mirror of
https://github.com/git/git.git
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2915 lines
70 KiB
C
2915 lines
70 KiB
C
/*
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* apply.c
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*
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* Copyright (C) Linus Torvalds, 2005
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*
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* This applies patches on top of some (arbitrary) version of the SCM.
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*
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*/
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#include "cache.h"
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#include "cache-tree.h"
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#include "quote.h"
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#include "blob.h"
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#include "delta.h"
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#include "builtin.h"
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/*
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* --check turns on checking that the working tree matches the
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* files that are being modified, but doesn't apply the patch
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* --stat does just a diffstat, and doesn't actually apply
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* --numstat does numeric diffstat, and doesn't actually apply
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* --index-info shows the old and new index info for paths if available.
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* --index updates the cache as well.
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* --cached updates only the cache without ever touching the working tree.
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*/
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static const char *prefix;
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static int prefix_length = -1;
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static int newfd = -1;
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static int unidiff_zero;
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static int p_value = 1;
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static int p_value_known;
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static int check_index;
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static int update_index;
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static int cached;
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static int diffstat;
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static int numstat;
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static int summary;
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static int check;
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static int apply = 1;
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static int apply_in_reverse;
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static int apply_with_reject;
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static int apply_verbosely;
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static int no_add;
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static int show_index_info;
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static int line_termination = '\n';
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static unsigned long p_context = ULONG_MAX;
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static const char apply_usage[] =
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"git-apply [--stat] [--numstat] [--summary] [--check] [--index] [--cached] [--apply] [--no-add] [--index-info] [--allow-binary-replacement] [--reverse] [--reject] [--verbose] [-z] [-pNUM] [-CNUM] [--whitespace=<nowarn|warn|error|error-all|strip>] <patch>...";
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static enum whitespace_eol {
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nowarn_whitespace,
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warn_on_whitespace,
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error_on_whitespace,
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strip_whitespace,
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} new_whitespace = warn_on_whitespace;
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static int whitespace_error;
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static int squelch_whitespace_errors = 5;
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static int applied_after_fixing_ws;
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static const char *patch_input_file;
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static void parse_whitespace_option(const char *option)
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{
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if (!option) {
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new_whitespace = warn_on_whitespace;
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return;
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}
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if (!strcmp(option, "warn")) {
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new_whitespace = warn_on_whitespace;
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return;
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}
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if (!strcmp(option, "nowarn")) {
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new_whitespace = nowarn_whitespace;
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return;
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}
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if (!strcmp(option, "error")) {
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new_whitespace = error_on_whitespace;
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return;
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}
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if (!strcmp(option, "error-all")) {
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new_whitespace = error_on_whitespace;
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squelch_whitespace_errors = 0;
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return;
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}
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if (!strcmp(option, "strip")) {
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new_whitespace = strip_whitespace;
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return;
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}
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die("unrecognized whitespace option '%s'", option);
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}
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static void set_default_whitespace_mode(const char *whitespace_option)
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{
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if (!whitespace_option && !apply_default_whitespace) {
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new_whitespace = (apply
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? warn_on_whitespace
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: nowarn_whitespace);
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}
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}
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/*
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* For "diff-stat" like behaviour, we keep track of the biggest change
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* we've seen, and the longest filename. That allows us to do simple
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* scaling.
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*/
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static int max_change, max_len;
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/*
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* Various "current state", notably line numbers and what
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* file (and how) we're patching right now.. The "is_xxxx"
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* things are flags, where -1 means "don't know yet".
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*/
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static int linenr = 1;
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/*
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* This represents one "hunk" from a patch, starting with
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* "@@ -oldpos,oldlines +newpos,newlines @@" marker. The
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* patch text is pointed at by patch, and its byte length
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* is stored in size. leading and trailing are the number
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* of context lines.
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*/
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struct fragment {
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unsigned long leading, trailing;
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unsigned long oldpos, oldlines;
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unsigned long newpos, newlines;
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const char *patch;
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int size;
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int rejected;
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struct fragment *next;
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};
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/*
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* When dealing with a binary patch, we reuse "leading" field
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* to store the type of the binary hunk, either deflated "delta"
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* or deflated "literal".
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*/
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#define binary_patch_method leading
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#define BINARY_DELTA_DEFLATED 1
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#define BINARY_LITERAL_DEFLATED 2
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struct patch {
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char *new_name, *old_name, *def_name;
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unsigned int old_mode, new_mode;
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int is_new, is_delete; /* -1 = unknown, 0 = false, 1 = true */
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int rejected;
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unsigned long deflate_origlen;
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int lines_added, lines_deleted;
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int score;
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unsigned int is_toplevel_relative:1;
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unsigned int inaccurate_eof:1;
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unsigned int is_binary:1;
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unsigned int is_copy:1;
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unsigned int is_rename:1;
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struct fragment *fragments;
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char *result;
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unsigned long resultsize;
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char old_sha1_prefix[41];
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char new_sha1_prefix[41];
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struct patch *next;
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};
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static void say_patch_name(FILE *output, const char *pre, struct patch *patch, const char *post)
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{
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fputs(pre, output);
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if (patch->old_name && patch->new_name &&
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strcmp(patch->old_name, patch->new_name)) {
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write_name_quoted(NULL, 0, patch->old_name, 1, output);
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fputs(" => ", output);
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write_name_quoted(NULL, 0, patch->new_name, 1, output);
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}
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else {
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const char *n = patch->new_name;
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if (!n)
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n = patch->old_name;
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write_name_quoted(NULL, 0, n, 1, output);
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}
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fputs(post, output);
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}
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#define CHUNKSIZE (8192)
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#define SLOP (16)
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static void *read_patch_file(int fd, unsigned long *sizep)
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{
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unsigned long size = 0, alloc = CHUNKSIZE;
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void *buffer = xmalloc(alloc);
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for (;;) {
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ssize_t nr = alloc - size;
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if (nr < 1024) {
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alloc += CHUNKSIZE;
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buffer = xrealloc(buffer, alloc);
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nr = alloc - size;
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}
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nr = xread(fd, (char *) buffer + size, nr);
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if (!nr)
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break;
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if (nr < 0)
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die("git-apply: read returned %s", strerror(errno));
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size += nr;
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}
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*sizep = size;
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/*
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* Make sure that we have some slop in the buffer
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* so that we can do speculative "memcmp" etc, and
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* see to it that it is NUL-filled.
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*/
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if (alloc < size + SLOP)
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buffer = xrealloc(buffer, size + SLOP);
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memset((char *) buffer + size, 0, SLOP);
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return buffer;
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}
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static unsigned long linelen(const char *buffer, unsigned long size)
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{
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unsigned long len = 0;
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while (size--) {
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len++;
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if (*buffer++ == '\n')
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break;
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}
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return len;
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}
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static int is_dev_null(const char *str)
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{
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return !memcmp("/dev/null", str, 9) && isspace(str[9]);
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}
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#define TERM_SPACE 1
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#define TERM_TAB 2
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static int name_terminate(const char *name, int namelen, int c, int terminate)
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{
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if (c == ' ' && !(terminate & TERM_SPACE))
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return 0;
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if (c == '\t' && !(terminate & TERM_TAB))
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return 0;
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return 1;
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}
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static char *find_name(const char *line, char *def, int p_value, int terminate)
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{
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int len;
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const char *start = line;
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char *name;
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if (*line == '"') {
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/* Proposed "new-style" GNU patch/diff format; see
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* http://marc.theaimsgroup.com/?l=git&m=112927316408690&w=2
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*/
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name = unquote_c_style(line, NULL);
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if (name) {
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char *cp = name;
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while (p_value) {
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cp = strchr(name, '/');
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if (!cp)
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break;
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cp++;
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p_value--;
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}
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if (cp) {
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/* name can later be freed, so we need
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* to memmove, not just return cp
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*/
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memmove(name, cp, strlen(cp) + 1);
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free(def);
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return name;
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}
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else {
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free(name);
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name = NULL;
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}
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}
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}
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for (;;) {
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char c = *line;
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if (isspace(c)) {
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if (c == '\n')
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break;
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if (name_terminate(start, line-start, c, terminate))
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break;
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}
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line++;
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if (c == '/' && !--p_value)
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start = line;
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}
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if (!start)
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return def;
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len = line - start;
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if (!len)
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return def;
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/*
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* Generally we prefer the shorter name, especially
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* if the other one is just a variation of that with
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* something else tacked on to the end (ie "file.orig"
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* or "file~").
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*/
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if (def) {
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int deflen = strlen(def);
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if (deflen < len && !strncmp(start, def, deflen))
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return def;
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}
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name = xmalloc(len + 1);
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memcpy(name, start, len);
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name[len] = 0;
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free(def);
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return name;
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}
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static int count_slashes(const char *cp)
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{
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int cnt = 0;
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char ch;
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while ((ch = *cp++))
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if (ch == '/')
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cnt++;
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return cnt;
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}
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/*
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* Given the string after "--- " or "+++ ", guess the appropriate
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* p_value for the given patch.
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*/
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static int guess_p_value(const char *nameline)
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{
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char *name, *cp;
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int val = -1;
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if (is_dev_null(nameline))
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return -1;
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name = find_name(nameline, NULL, 0, TERM_SPACE | TERM_TAB);
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if (!name)
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return -1;
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cp = strchr(name, '/');
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if (!cp)
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val = 0;
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else if (prefix) {
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/*
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* Does it begin with "a/$our-prefix" and such? Then this is
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* very likely to apply to our directory.
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*/
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if (!strncmp(name, prefix, prefix_length))
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val = count_slashes(prefix);
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else {
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cp++;
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if (!strncmp(cp, prefix, prefix_length))
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val = count_slashes(prefix) + 1;
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}
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}
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free(name);
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return val;
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}
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/*
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* Get the name etc info from the --/+++ lines of a traditional patch header
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*
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* FIXME! The end-of-filename heuristics are kind of screwy. For existing
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* files, we can happily check the index for a match, but for creating a
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* new file we should try to match whatever "patch" does. I have no idea.
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*/
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static void parse_traditional_patch(const char *first, const char *second, struct patch *patch)
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{
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char *name;
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first += 4; /* skip "--- " */
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second += 4; /* skip "+++ " */
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if (!p_value_known) {
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int p, q;
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p = guess_p_value(first);
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q = guess_p_value(second);
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if (p < 0) p = q;
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if (0 <= p && p == q) {
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p_value = p;
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p_value_known = 1;
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}
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}
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if (is_dev_null(first)) {
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patch->is_new = 1;
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patch->is_delete = 0;
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name = find_name(second, NULL, p_value, TERM_SPACE | TERM_TAB);
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patch->new_name = name;
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} else if (is_dev_null(second)) {
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patch->is_new = 0;
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patch->is_delete = 1;
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name = find_name(first, NULL, p_value, TERM_SPACE | TERM_TAB);
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patch->old_name = name;
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} else {
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name = find_name(first, NULL, p_value, TERM_SPACE | TERM_TAB);
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name = find_name(second, name, p_value, TERM_SPACE | TERM_TAB);
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patch->old_name = patch->new_name = name;
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}
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if (!name)
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die("unable to find filename in patch at line %d", linenr);
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}
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static int gitdiff_hdrend(const char *line, struct patch *patch)
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{
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return -1;
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}
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/*
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* We're anal about diff header consistency, to make
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* sure that we don't end up having strange ambiguous
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* patches floating around.
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*
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* As a result, gitdiff_{old|new}name() will check
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* their names against any previous information, just
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* to make sure..
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*/
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static char *gitdiff_verify_name(const char *line, int isnull, char *orig_name, const char *oldnew)
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{
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if (!orig_name && !isnull)
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return find_name(line, NULL, p_value, TERM_TAB);
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if (orig_name) {
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int len;
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const char *name;
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char *another;
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name = orig_name;
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len = strlen(name);
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if (isnull)
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die("git-apply: bad git-diff - expected /dev/null, got %s on line %d", name, linenr);
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another = find_name(line, NULL, p_value, TERM_TAB);
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if (!another || memcmp(another, name, len))
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die("git-apply: bad git-diff - inconsistent %s filename on line %d", oldnew, linenr);
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free(another);
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return orig_name;
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}
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else {
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/* expect "/dev/null" */
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if (memcmp("/dev/null", line, 9) || line[9] != '\n')
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die("git-apply: bad git-diff - expected /dev/null on line %d", linenr);
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return NULL;
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}
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}
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static int gitdiff_oldname(const char *line, struct patch *patch)
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{
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patch->old_name = gitdiff_verify_name(line, patch->is_new, patch->old_name, "old");
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return 0;
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}
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static int gitdiff_newname(const char *line, struct patch *patch)
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{
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patch->new_name = gitdiff_verify_name(line, patch->is_delete, patch->new_name, "new");
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return 0;
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}
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static int gitdiff_oldmode(const char *line, struct patch *patch)
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{
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patch->old_mode = strtoul(line, NULL, 8);
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return 0;
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}
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static int gitdiff_newmode(const char *line, struct patch *patch)
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{
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patch->new_mode = strtoul(line, NULL, 8);
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return 0;
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}
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static int gitdiff_delete(const char *line, struct patch *patch)
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{
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patch->is_delete = 1;
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patch->old_name = patch->def_name;
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return gitdiff_oldmode(line, patch);
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}
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static int gitdiff_newfile(const char *line, struct patch *patch)
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{
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patch->is_new = 1;
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patch->new_name = patch->def_name;
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return gitdiff_newmode(line, patch);
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}
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static int gitdiff_copysrc(const char *line, struct patch *patch)
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{
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patch->is_copy = 1;
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patch->old_name = find_name(line, NULL, 0, 0);
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return 0;
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}
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static int gitdiff_copydst(const char *line, struct patch *patch)
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{
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patch->is_copy = 1;
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patch->new_name = find_name(line, NULL, 0, 0);
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return 0;
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}
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static int gitdiff_renamesrc(const char *line, struct patch *patch)
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{
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patch->is_rename = 1;
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patch->old_name = find_name(line, NULL, 0, 0);
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return 0;
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}
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static int gitdiff_renamedst(const char *line, struct patch *patch)
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{
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patch->is_rename = 1;
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patch->new_name = find_name(line, NULL, 0, 0);
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return 0;
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}
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static int gitdiff_similarity(const char *line, struct patch *patch)
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{
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if ((patch->score = strtoul(line, NULL, 10)) == ULONG_MAX)
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patch->score = 0;
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return 0;
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}
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static int gitdiff_dissimilarity(const char *line, struct patch *patch)
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{
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if ((patch->score = strtoul(line, NULL, 10)) == ULONG_MAX)
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patch->score = 0;
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return 0;
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}
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static int gitdiff_index(const char *line, struct patch *patch)
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{
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/* index line is N hexadecimal, "..", N hexadecimal,
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* and optional space with octal mode.
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*/
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|
const char *ptr, *eol;
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int len;
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ptr = strchr(line, '.');
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if (!ptr || ptr[1] != '.' || 40 < ptr - line)
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return 0;
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len = ptr - line;
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memcpy(patch->old_sha1_prefix, line, len);
|
|
patch->old_sha1_prefix[len] = 0;
|
|
|
|
line = ptr + 2;
|
|
ptr = strchr(line, ' ');
|
|
eol = strchr(line, '\n');
|
|
|
|
if (!ptr || eol < ptr)
|
|
ptr = eol;
|
|
len = ptr - line;
|
|
|
|
if (40 < len)
|
|
return 0;
|
|
memcpy(patch->new_sha1_prefix, line, len);
|
|
patch->new_sha1_prefix[len] = 0;
|
|
if (*ptr == ' ')
|
|
patch->new_mode = patch->old_mode = strtoul(ptr+1, NULL, 8);
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* This is normal for a diff that doesn't change anything: we'll fall through
|
|
* into the next diff. Tell the parser to break out.
|
|
*/
|
|
static int gitdiff_unrecognized(const char *line, struct patch *patch)
|
|
{
|
|
return -1;
|
|
}
|
|
|
|
static const char *stop_at_slash(const char *line, int llen)
|
|
{
|
|
int i;
|
|
|
|
for (i = 0; i < llen; i++) {
|
|
int ch = line[i];
|
|
if (ch == '/')
|
|
return line + i;
|
|
}
|
|
return NULL;
|
|
}
|
|
|
|
/* This is to extract the same name that appears on "diff --git"
|
|
* line. We do not find and return anything if it is a rename
|
|
* patch, and it is OK because we will find the name elsewhere.
|
|
* We need to reliably find name only when it is mode-change only,
|
|
* creation or deletion of an empty file. In any of these cases,
|
|
* both sides are the same name under a/ and b/ respectively.
|
|
*/
|
|
static char *git_header_name(char *line, int llen)
|
|
{
|
|
int len;
|
|
const char *name;
|
|
const char *second = NULL;
|
|
|
|
line += strlen("diff --git ");
|
|
llen -= strlen("diff --git ");
|
|
|
|
if (*line == '"') {
|
|
const char *cp;
|
|
char *first = unquote_c_style(line, &second);
|
|
if (!first)
|
|
return NULL;
|
|
|
|
/* advance to the first slash */
|
|
cp = stop_at_slash(first, strlen(first));
|
|
if (!cp || cp == first) {
|
|
/* we do not accept absolute paths */
|
|
free_first_and_fail:
|
|
free(first);
|
|
return NULL;
|
|
}
|
|
len = strlen(cp+1);
|
|
memmove(first, cp+1, len+1); /* including NUL */
|
|
|
|
/* second points at one past closing dq of name.
|
|
* find the second name.
|
|
*/
|
|
while ((second < line + llen) && isspace(*second))
|
|
second++;
|
|
|
|
if (line + llen <= second)
|
|
goto free_first_and_fail;
|
|
if (*second == '"') {
|
|
char *sp = unquote_c_style(second, NULL);
|
|
if (!sp)
|
|
goto free_first_and_fail;
|
|
cp = stop_at_slash(sp, strlen(sp));
|
|
if (!cp || cp == sp) {
|
|
free_both_and_fail:
|
|
free(sp);
|
|
goto free_first_and_fail;
|
|
}
|
|
/* They must match, otherwise ignore */
|
|
if (strcmp(cp+1, first))
|
|
goto free_both_and_fail;
|
|
free(sp);
|
|
return first;
|
|
}
|
|
|
|
/* unquoted second */
|
|
cp = stop_at_slash(second, line + llen - second);
|
|
if (!cp || cp == second)
|
|
goto free_first_and_fail;
|
|
cp++;
|
|
if (line + llen - cp != len + 1 ||
|
|
memcmp(first, cp, len))
|
|
goto free_first_and_fail;
|
|
return first;
|
|
}
|
|
|
|
/* unquoted first name */
|
|
name = stop_at_slash(line, llen);
|
|
if (!name || name == line)
|
|
return NULL;
|
|
|
|
name++;
|
|
|
|
/* since the first name is unquoted, a dq if exists must be
|
|
* the beginning of the second name.
|
|
*/
|
|
for (second = name; second < line + llen; second++) {
|
|
if (*second == '"') {
|
|
const char *cp = second;
|
|
const char *np;
|
|
char *sp = unquote_c_style(second, NULL);
|
|
|
|
if (!sp)
|
|
return NULL;
|
|
np = stop_at_slash(sp, strlen(sp));
|
|
if (!np || np == sp) {
|
|
free_second_and_fail:
|
|
free(sp);
|
|
return NULL;
|
|
}
|
|
np++;
|
|
len = strlen(np);
|
|
if (len < cp - name &&
|
|
!strncmp(np, name, len) &&
|
|
isspace(name[len])) {
|
|
/* Good */
|
|
memmove(sp, np, len + 1);
|
|
return sp;
|
|
}
|
|
goto free_second_and_fail;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Accept a name only if it shows up twice, exactly the same
|
|
* form.
|
|
*/
|
|
for (len = 0 ; ; len++) {
|
|
switch (name[len]) {
|
|
default:
|
|
continue;
|
|
case '\n':
|
|
return NULL;
|
|
case '\t': case ' ':
|
|
second = name+len;
|
|
for (;;) {
|
|
char c = *second++;
|
|
if (c == '\n')
|
|
return NULL;
|
|
if (c == '/')
|
|
break;
|
|
}
|
|
if (second[len] == '\n' && !memcmp(name, second, len)) {
|
|
char *ret = xmalloc(len + 1);
|
|
memcpy(ret, name, len);
|
|
ret[len] = 0;
|
|
return ret;
|
|
}
|
|
}
|
|
}
|
|
return NULL;
|
|
}
|
|
|
|
/* Verify that we recognize the lines following a git header */
|
|
static int parse_git_header(char *line, int len, unsigned int size, struct patch *patch)
|
|
{
|
|
unsigned long offset;
|
|
|
|
/* A git diff has explicit new/delete information, so we don't guess */
|
|
patch->is_new = 0;
|
|
patch->is_delete = 0;
|
|
|
|
/*
|
|
* Some things may not have the old name in the
|
|
* rest of the headers anywhere (pure mode changes,
|
|
* or removing or adding empty files), so we get
|
|
* the default name from the header.
|
|
*/
|
|
patch->def_name = git_header_name(line, len);
|
|
|
|
line += len;
|
|
size -= len;
|
|
linenr++;
|
|
for (offset = len ; size > 0 ; offset += len, size -= len, line += len, linenr++) {
|
|
static const struct opentry {
|
|
const char *str;
|
|
int (*fn)(const char *, struct patch *);
|
|
} optable[] = {
|
|
{ "@@ -", gitdiff_hdrend },
|
|
{ "--- ", gitdiff_oldname },
|
|
{ "+++ ", gitdiff_newname },
|
|
{ "old mode ", gitdiff_oldmode },
|
|
{ "new mode ", gitdiff_newmode },
|
|
{ "deleted file mode ", gitdiff_delete },
|
|
{ "new file mode ", gitdiff_newfile },
|
|
{ "copy from ", gitdiff_copysrc },
|
|
{ "copy to ", gitdiff_copydst },
|
|
{ "rename old ", gitdiff_renamesrc },
|
|
{ "rename new ", gitdiff_renamedst },
|
|
{ "rename from ", gitdiff_renamesrc },
|
|
{ "rename to ", gitdiff_renamedst },
|
|
{ "similarity index ", gitdiff_similarity },
|
|
{ "dissimilarity index ", gitdiff_dissimilarity },
|
|
{ "index ", gitdiff_index },
|
|
{ "", gitdiff_unrecognized },
|
|
};
|
|
int i;
|
|
|
|
len = linelen(line, size);
|
|
if (!len || line[len-1] != '\n')
|
|
break;
|
|
for (i = 0; i < ARRAY_SIZE(optable); i++) {
|
|
const struct opentry *p = optable + i;
|
|
int oplen = strlen(p->str);
|
|
if (len < oplen || memcmp(p->str, line, oplen))
|
|
continue;
|
|
if (p->fn(line + oplen, patch) < 0)
|
|
return offset;
|
|
break;
|
|
}
|
|
}
|
|
|
|
return offset;
|
|
}
|
|
|
|
static int parse_num(const char *line, unsigned long *p)
|
|
{
|
|
char *ptr;
|
|
|
|
if (!isdigit(*line))
|
|
return 0;
|
|
*p = strtoul(line, &ptr, 10);
|
|
return ptr - line;
|
|
}
|
|
|
|
static int parse_range(const char *line, int len, int offset, const char *expect,
|
|
unsigned long *p1, unsigned long *p2)
|
|
{
|
|
int digits, ex;
|
|
|
|
if (offset < 0 || offset >= len)
|
|
return -1;
|
|
line += offset;
|
|
len -= offset;
|
|
|
|
digits = parse_num(line, p1);
|
|
if (!digits)
|
|
return -1;
|
|
|
|
offset += digits;
|
|
line += digits;
|
|
len -= digits;
|
|
|
|
*p2 = 1;
|
|
if (*line == ',') {
|
|
digits = parse_num(line+1, p2);
|
|
if (!digits)
|
|
return -1;
|
|
|
|
offset += digits+1;
|
|
line += digits+1;
|
|
len -= digits+1;
|
|
}
|
|
|
|
ex = strlen(expect);
|
|
if (ex > len)
|
|
return -1;
|
|
if (memcmp(line, expect, ex))
|
|
return -1;
|
|
|
|
return offset + ex;
|
|
}
|
|
|
|
/*
|
|
* Parse a unified diff fragment header of the
|
|
* form "@@ -a,b +c,d @@"
|
|
*/
|
|
static int parse_fragment_header(char *line, int len, struct fragment *fragment)
|
|
{
|
|
int offset;
|
|
|
|
if (!len || line[len-1] != '\n')
|
|
return -1;
|
|
|
|
/* Figure out the number of lines in a fragment */
|
|
offset = parse_range(line, len, 4, " +", &fragment->oldpos, &fragment->oldlines);
|
|
offset = parse_range(line, len, offset, " @@", &fragment->newpos, &fragment->newlines);
|
|
|
|
return offset;
|
|
}
|
|
|
|
static int find_header(char *line, unsigned long size, int *hdrsize, struct patch *patch)
|
|
{
|
|
unsigned long offset, len;
|
|
|
|
patch->is_toplevel_relative = 0;
|
|
patch->is_rename = patch->is_copy = 0;
|
|
patch->is_new = patch->is_delete = -1;
|
|
patch->old_mode = patch->new_mode = 0;
|
|
patch->old_name = patch->new_name = NULL;
|
|
for (offset = 0; size > 0; offset += len, size -= len, line += len, linenr++) {
|
|
unsigned long nextlen;
|
|
|
|
len = linelen(line, size);
|
|
if (!len)
|
|
break;
|
|
|
|
/* Testing this early allows us to take a few shortcuts.. */
|
|
if (len < 6)
|
|
continue;
|
|
|
|
/*
|
|
* Make sure we don't find any unconnected patch fragments.
|
|
* That's a sign that we didn't find a header, and that a
|
|
* patch has become corrupted/broken up.
|
|
*/
|
|
if (!memcmp("@@ -", line, 4)) {
|
|
struct fragment dummy;
|
|
if (parse_fragment_header(line, len, &dummy) < 0)
|
|
continue;
|
|
die("patch fragment without header at line %d: %.*s",
|
|
linenr, (int)len-1, line);
|
|
}
|
|
|
|
if (size < len + 6)
|
|
break;
|
|
|
|
/*
|
|
* Git patch? It might not have a real patch, just a rename
|
|
* or mode change, so we handle that specially
|
|
*/
|
|
if (!memcmp("diff --git ", line, 11)) {
|
|
int git_hdr_len = parse_git_header(line, len, size, patch);
|
|
if (git_hdr_len <= len)
|
|
continue;
|
|
if (!patch->old_name && !patch->new_name) {
|
|
if (!patch->def_name)
|
|
die("git diff header lacks filename information (line %d)", linenr);
|
|
patch->old_name = patch->new_name = patch->def_name;
|
|
}
|
|
patch->is_toplevel_relative = 1;
|
|
*hdrsize = git_hdr_len;
|
|
return offset;
|
|
}
|
|
|
|
/** --- followed by +++ ? */
|
|
if (memcmp("--- ", line, 4) || memcmp("+++ ", line + len, 4))
|
|
continue;
|
|
|
|
/*
|
|
* We only accept unified patches, so we want it to
|
|
* at least have "@@ -a,b +c,d @@\n", which is 14 chars
|
|
* minimum
|
|
*/
|
|
nextlen = linelen(line + len, size - len);
|
|
if (size < nextlen + 14 || memcmp("@@ -", line + len + nextlen, 4))
|
|
continue;
|
|
|
|
/* Ok, we'll consider it a patch */
|
|
parse_traditional_patch(line, line+len, patch);
|
|
*hdrsize = len + nextlen;
|
|
linenr += 2;
|
|
return offset;
|
|
}
|
|
return -1;
|
|
}
|
|
|
|
static void check_whitespace(const char *line, int len)
|
|
{
|
|
const char *err = "Adds trailing whitespace";
|
|
int seen_space = 0;
|
|
int i;
|
|
|
|
/*
|
|
* We know len is at least two, since we have a '+' and we
|
|
* checked that the last character was a '\n' before calling
|
|
* this function. That is, an addition of an empty line would
|
|
* check the '+' here. Sneaky...
|
|
*/
|
|
if (isspace(line[len-2]))
|
|
goto error;
|
|
|
|
/*
|
|
* Make sure that there is no space followed by a tab in
|
|
* indentation.
|
|
*/
|
|
err = "Space in indent is followed by a tab";
|
|
for (i = 1; i < len; i++) {
|
|
if (line[i] == '\t') {
|
|
if (seen_space)
|
|
goto error;
|
|
}
|
|
else if (line[i] == ' ')
|
|
seen_space = 1;
|
|
else
|
|
break;
|
|
}
|
|
return;
|
|
|
|
error:
|
|
whitespace_error++;
|
|
if (squelch_whitespace_errors &&
|
|
squelch_whitespace_errors < whitespace_error)
|
|
;
|
|
else
|
|
fprintf(stderr, "%s.\n%s:%d:%.*s\n",
|
|
err, patch_input_file, linenr, len-2, line+1);
|
|
}
|
|
|
|
|
|
/*
|
|
* Parse a unified diff. Note that this really needs to parse each
|
|
* fragment separately, since the only way to know the difference
|
|
* between a "---" that is part of a patch, and a "---" that starts
|
|
* the next patch is to look at the line counts..
|
|
*/
|
|
static int parse_fragment(char *line, unsigned long size, struct patch *patch, struct fragment *fragment)
|
|
{
|
|
int added, deleted;
|
|
int len = linelen(line, size), offset;
|
|
unsigned long oldlines, newlines;
|
|
unsigned long leading, trailing;
|
|
|
|
offset = parse_fragment_header(line, len, fragment);
|
|
if (offset < 0)
|
|
return -1;
|
|
oldlines = fragment->oldlines;
|
|
newlines = fragment->newlines;
|
|
leading = 0;
|
|
trailing = 0;
|
|
|
|
/* Parse the thing.. */
|
|
line += len;
|
|
size -= len;
|
|
linenr++;
|
|
added = deleted = 0;
|
|
for (offset = len;
|
|
0 < size;
|
|
offset += len, size -= len, line += len, linenr++) {
|
|
if (!oldlines && !newlines)
|
|
break;
|
|
len = linelen(line, size);
|
|
if (!len || line[len-1] != '\n')
|
|
return -1;
|
|
switch (*line) {
|
|
default:
|
|
return -1;
|
|
case '\n': /* newer GNU diff, an empty context line */
|
|
case ' ':
|
|
oldlines--;
|
|
newlines--;
|
|
if (!deleted && !added)
|
|
leading++;
|
|
trailing++;
|
|
break;
|
|
case '-':
|
|
if (apply_in_reverse &&
|
|
new_whitespace != nowarn_whitespace)
|
|
check_whitespace(line, len);
|
|
deleted++;
|
|
oldlines--;
|
|
trailing = 0;
|
|
break;
|
|
case '+':
|
|
if (!apply_in_reverse &&
|
|
new_whitespace != nowarn_whitespace)
|
|
check_whitespace(line, len);
|
|
added++;
|
|
newlines--;
|
|
trailing = 0;
|
|
break;
|
|
|
|
/* We allow "\ No newline at end of file". Depending
|
|
* on locale settings when the patch was produced we
|
|
* don't know what this line looks like. The only
|
|
* thing we do know is that it begins with "\ ".
|
|
* Checking for 12 is just for sanity check -- any
|
|
* l10n of "\ No newline..." is at least that long.
|
|
*/
|
|
case '\\':
|
|
if (len < 12 || memcmp(line, "\\ ", 2))
|
|
return -1;
|
|
break;
|
|
}
|
|
}
|
|
if (oldlines || newlines)
|
|
return -1;
|
|
fragment->leading = leading;
|
|
fragment->trailing = trailing;
|
|
|
|
/* If a fragment ends with an incomplete line, we failed to include
|
|
* it in the above loop because we hit oldlines == newlines == 0
|
|
* before seeing it.
|
|
*/
|
|
if (12 < size && !memcmp(line, "\\ ", 2))
|
|
offset += linelen(line, size);
|
|
|
|
patch->lines_added += added;
|
|
patch->lines_deleted += deleted;
|
|
|
|
if (0 < patch->is_new && oldlines)
|
|
return error("new file depends on old contents");
|
|
if (0 < patch->is_delete && newlines)
|
|
return error("deleted file still has contents");
|
|
return offset;
|
|
}
|
|
|
|
static int parse_single_patch(char *line, unsigned long size, struct patch *patch)
|
|
{
|
|
unsigned long offset = 0;
|
|
unsigned long oldlines = 0, newlines = 0, context = 0;
|
|
struct fragment **fragp = &patch->fragments;
|
|
|
|
while (size > 4 && !memcmp(line, "@@ -", 4)) {
|
|
struct fragment *fragment;
|
|
int len;
|
|
|
|
fragment = xcalloc(1, sizeof(*fragment));
|
|
len = parse_fragment(line, size, patch, fragment);
|
|
if (len <= 0)
|
|
die("corrupt patch at line %d", linenr);
|
|
fragment->patch = line;
|
|
fragment->size = len;
|
|
oldlines += fragment->oldlines;
|
|
newlines += fragment->newlines;
|
|
context += fragment->leading + fragment->trailing;
|
|
|
|
*fragp = fragment;
|
|
fragp = &fragment->next;
|
|
|
|
offset += len;
|
|
line += len;
|
|
size -= len;
|
|
}
|
|
|
|
/*
|
|
* If something was removed (i.e. we have old-lines) it cannot
|
|
* be creation, and if something was added it cannot be
|
|
* deletion. However, the reverse is not true; --unified=0
|
|
* patches that only add are not necessarily creation even
|
|
* though they do not have any old lines, and ones that only
|
|
* delete are not necessarily deletion.
|
|
*
|
|
* Unfortunately, a real creation/deletion patch do _not_ have
|
|
* any context line by definition, so we cannot safely tell it
|
|
* apart with --unified=0 insanity. At least if the patch has
|
|
* more than one hunk it is not creation or deletion.
|
|
*/
|
|
if (patch->is_new < 0 &&
|
|
(oldlines || (patch->fragments && patch->fragments->next)))
|
|
patch->is_new = 0;
|
|
if (patch->is_delete < 0 &&
|
|
(newlines || (patch->fragments && patch->fragments->next)))
|
|
patch->is_delete = 0;
|
|
if (!unidiff_zero || context) {
|
|
/* If the user says the patch is not generated with
|
|
* --unified=0, or if we have seen context lines,
|
|
* then not having oldlines means the patch is creation,
|
|
* and not having newlines means the patch is deletion.
|
|
*/
|
|
if (patch->is_new < 0 && !oldlines) {
|
|
patch->is_new = 1;
|
|
patch->old_name = NULL;
|
|
}
|
|
if (patch->is_delete < 0 && !newlines) {
|
|
patch->is_delete = 1;
|
|
patch->new_name = NULL;
|
|
}
|
|
}
|
|
|
|
if (0 < patch->is_new && oldlines)
|
|
die("new file %s depends on old contents", patch->new_name);
|
|
if (0 < patch->is_delete && newlines)
|
|
die("deleted file %s still has contents", patch->old_name);
|
|
if (!patch->is_delete && !newlines && context)
|
|
fprintf(stderr, "** warning: file %s becomes empty but "
|
|
"is not deleted\n", patch->new_name);
|
|
|
|
return offset;
|
|
}
|
|
|
|
static inline int metadata_changes(struct patch *patch)
|
|
{
|
|
return patch->is_rename > 0 ||
|
|
patch->is_copy > 0 ||
|
|
patch->is_new > 0 ||
|
|
patch->is_delete ||
|
|
(patch->old_mode && patch->new_mode &&
|
|
patch->old_mode != patch->new_mode);
|
|
}
|
|
|
|
static char *inflate_it(const void *data, unsigned long size,
|
|
unsigned long inflated_size)
|
|
{
|
|
z_stream stream;
|
|
void *out;
|
|
int st;
|
|
|
|
memset(&stream, 0, sizeof(stream));
|
|
|
|
stream.next_in = (unsigned char *)data;
|
|
stream.avail_in = size;
|
|
stream.next_out = out = xmalloc(inflated_size);
|
|
stream.avail_out = inflated_size;
|
|
inflateInit(&stream);
|
|
st = inflate(&stream, Z_FINISH);
|
|
if ((st != Z_STREAM_END) || stream.total_out != inflated_size) {
|
|
free(out);
|
|
return NULL;
|
|
}
|
|
return out;
|
|
}
|
|
|
|
static struct fragment *parse_binary_hunk(char **buf_p,
|
|
unsigned long *sz_p,
|
|
int *status_p,
|
|
int *used_p)
|
|
{
|
|
/* Expect a line that begins with binary patch method ("literal"
|
|
* or "delta"), followed by the length of data before deflating.
|
|
* a sequence of 'length-byte' followed by base-85 encoded data
|
|
* should follow, terminated by a newline.
|
|
*
|
|
* Each 5-byte sequence of base-85 encodes up to 4 bytes,
|
|
* and we would limit the patch line to 66 characters,
|
|
* so one line can fit up to 13 groups that would decode
|
|
* to 52 bytes max. The length byte 'A'-'Z' corresponds
|
|
* to 1-26 bytes, and 'a'-'z' corresponds to 27-52 bytes.
|
|
*/
|
|
int llen, used;
|
|
unsigned long size = *sz_p;
|
|
char *buffer = *buf_p;
|
|
int patch_method;
|
|
unsigned long origlen;
|
|
char *data = NULL;
|
|
int hunk_size = 0;
|
|
struct fragment *frag;
|
|
|
|
llen = linelen(buffer, size);
|
|
used = llen;
|
|
|
|
*status_p = 0;
|
|
|
|
if (!prefixcmp(buffer, "delta ")) {
|
|
patch_method = BINARY_DELTA_DEFLATED;
|
|
origlen = strtoul(buffer + 6, NULL, 10);
|
|
}
|
|
else if (!prefixcmp(buffer, "literal ")) {
|
|
patch_method = BINARY_LITERAL_DEFLATED;
|
|
origlen = strtoul(buffer + 8, NULL, 10);
|
|
}
|
|
else
|
|
return NULL;
|
|
|
|
linenr++;
|
|
buffer += llen;
|
|
while (1) {
|
|
int byte_length, max_byte_length, newsize;
|
|
llen = linelen(buffer, size);
|
|
used += llen;
|
|
linenr++;
|
|
if (llen == 1) {
|
|
/* consume the blank line */
|
|
buffer++;
|
|
size--;
|
|
break;
|
|
}
|
|
/* Minimum line is "A00000\n" which is 7-byte long,
|
|
* and the line length must be multiple of 5 plus 2.
|
|
*/
|
|
if ((llen < 7) || (llen-2) % 5)
|
|
goto corrupt;
|
|
max_byte_length = (llen - 2) / 5 * 4;
|
|
byte_length = *buffer;
|
|
if ('A' <= byte_length && byte_length <= 'Z')
|
|
byte_length = byte_length - 'A' + 1;
|
|
else if ('a' <= byte_length && byte_length <= 'z')
|
|
byte_length = byte_length - 'a' + 27;
|
|
else
|
|
goto corrupt;
|
|
/* if the input length was not multiple of 4, we would
|
|
* have filler at the end but the filler should never
|
|
* exceed 3 bytes
|
|
*/
|
|
if (max_byte_length < byte_length ||
|
|
byte_length <= max_byte_length - 4)
|
|
goto corrupt;
|
|
newsize = hunk_size + byte_length;
|
|
data = xrealloc(data, newsize);
|
|
if (decode_85(data + hunk_size, buffer + 1, byte_length))
|
|
goto corrupt;
|
|
hunk_size = newsize;
|
|
buffer += llen;
|
|
size -= llen;
|
|
}
|
|
|
|
frag = xcalloc(1, sizeof(*frag));
|
|
frag->patch = inflate_it(data, hunk_size, origlen);
|
|
if (!frag->patch)
|
|
goto corrupt;
|
|
free(data);
|
|
frag->size = origlen;
|
|
*buf_p = buffer;
|
|
*sz_p = size;
|
|
*used_p = used;
|
|
frag->binary_patch_method = patch_method;
|
|
return frag;
|
|
|
|
corrupt:
|
|
free(data);
|
|
*status_p = -1;
|
|
error("corrupt binary patch at line %d: %.*s",
|
|
linenr-1, llen-1, buffer);
|
|
return NULL;
|
|
}
|
|
|
|
static int parse_binary(char *buffer, unsigned long size, struct patch *patch)
|
|
{
|
|
/* We have read "GIT binary patch\n"; what follows is a line
|
|
* that says the patch method (currently, either "literal" or
|
|
* "delta") and the length of data before deflating; a
|
|
* sequence of 'length-byte' followed by base-85 encoded data
|
|
* follows.
|
|
*
|
|
* When a binary patch is reversible, there is another binary
|
|
* hunk in the same format, starting with patch method (either
|
|
* "literal" or "delta") with the length of data, and a sequence
|
|
* of length-byte + base-85 encoded data, terminated with another
|
|
* empty line. This data, when applied to the postimage, produces
|
|
* the preimage.
|
|
*/
|
|
struct fragment *forward;
|
|
struct fragment *reverse;
|
|
int status;
|
|
int used, used_1;
|
|
|
|
forward = parse_binary_hunk(&buffer, &size, &status, &used);
|
|
if (!forward && !status)
|
|
/* there has to be one hunk (forward hunk) */
|
|
return error("unrecognized binary patch at line %d", linenr-1);
|
|
if (status)
|
|
/* otherwise we already gave an error message */
|
|
return status;
|
|
|
|
reverse = parse_binary_hunk(&buffer, &size, &status, &used_1);
|
|
if (reverse)
|
|
used += used_1;
|
|
else if (status) {
|
|
/* not having reverse hunk is not an error, but having
|
|
* a corrupt reverse hunk is.
|
|
*/
|
|
free((void*) forward->patch);
|
|
free(forward);
|
|
return status;
|
|
}
|
|
forward->next = reverse;
|
|
patch->fragments = forward;
|
|
patch->is_binary = 1;
|
|
return used;
|
|
}
|
|
|
|
static int parse_chunk(char *buffer, unsigned long size, struct patch *patch)
|
|
{
|
|
int hdrsize, patchsize;
|
|
int offset = find_header(buffer, size, &hdrsize, patch);
|
|
|
|
if (offset < 0)
|
|
return offset;
|
|
|
|
patchsize = parse_single_patch(buffer + offset + hdrsize, size - offset - hdrsize, patch);
|
|
|
|
if (!patchsize) {
|
|
static const char *binhdr[] = {
|
|
"Binary files ",
|
|
"Files ",
|
|
NULL,
|
|
};
|
|
static const char git_binary[] = "GIT binary patch\n";
|
|
int i;
|
|
int hd = hdrsize + offset;
|
|
unsigned long llen = linelen(buffer + hd, size - hd);
|
|
|
|
if (llen == sizeof(git_binary) - 1 &&
|
|
!memcmp(git_binary, buffer + hd, llen)) {
|
|
int used;
|
|
linenr++;
|
|
used = parse_binary(buffer + hd + llen,
|
|
size - hd - llen, patch);
|
|
if (used)
|
|
patchsize = used + llen;
|
|
else
|
|
patchsize = 0;
|
|
}
|
|
else if (!memcmp(" differ\n", buffer + hd + llen - 8, 8)) {
|
|
for (i = 0; binhdr[i]; i++) {
|
|
int len = strlen(binhdr[i]);
|
|
if (len < size - hd &&
|
|
!memcmp(binhdr[i], buffer + hd, len)) {
|
|
linenr++;
|
|
patch->is_binary = 1;
|
|
patchsize = llen;
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
/* Empty patch cannot be applied if it is a text patch
|
|
* without metadata change. A binary patch appears
|
|
* empty to us here.
|
|
*/
|
|
if ((apply || check) &&
|
|
(!patch->is_binary && !metadata_changes(patch)))
|
|
die("patch with only garbage at line %d", linenr);
|
|
}
|
|
|
|
return offset + hdrsize + patchsize;
|
|
}
|
|
|
|
#define swap(a,b) myswap((a),(b),sizeof(a))
|
|
|
|
#define myswap(a, b, size) do { \
|
|
unsigned char mytmp[size]; \
|
|
memcpy(mytmp, &a, size); \
|
|
memcpy(&a, &b, size); \
|
|
memcpy(&b, mytmp, size); \
|
|
} while (0)
|
|
|
|
static void reverse_patches(struct patch *p)
|
|
{
|
|
for (; p; p = p->next) {
|
|
struct fragment *frag = p->fragments;
|
|
|
|
swap(p->new_name, p->old_name);
|
|
swap(p->new_mode, p->old_mode);
|
|
swap(p->is_new, p->is_delete);
|
|
swap(p->lines_added, p->lines_deleted);
|
|
swap(p->old_sha1_prefix, p->new_sha1_prefix);
|
|
|
|
for (; frag; frag = frag->next) {
|
|
swap(frag->newpos, frag->oldpos);
|
|
swap(frag->newlines, frag->oldlines);
|
|
}
|
|
}
|
|
}
|
|
|
|
static const char pluses[] = "++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++";
|
|
static const char minuses[]= "----------------------------------------------------------------------";
|
|
|
|
static void show_stats(struct patch *patch)
|
|
{
|
|
const char *prefix = "";
|
|
char *name = patch->new_name;
|
|
char *qname = NULL;
|
|
int len, max, add, del, total;
|
|
|
|
if (!name)
|
|
name = patch->old_name;
|
|
|
|
if (0 < (len = quote_c_style(name, NULL, NULL, 0))) {
|
|
qname = xmalloc(len + 1);
|
|
quote_c_style(name, qname, NULL, 0);
|
|
name = qname;
|
|
}
|
|
|
|
/*
|
|
* "scale" the filename
|
|
*/
|
|
len = strlen(name);
|
|
max = max_len;
|
|
if (max > 50)
|
|
max = 50;
|
|
if (len > max) {
|
|
char *slash;
|
|
prefix = "...";
|
|
max -= 3;
|
|
name += len - max;
|
|
slash = strchr(name, '/');
|
|
if (slash)
|
|
name = slash;
|
|
}
|
|
len = max;
|
|
|
|
/*
|
|
* scale the add/delete
|
|
*/
|
|
max = max_change;
|
|
if (max + len > 70)
|
|
max = 70 - len;
|
|
|
|
add = patch->lines_added;
|
|
del = patch->lines_deleted;
|
|
total = add + del;
|
|
|
|
if (max_change > 0) {
|
|
total = (total * max + max_change / 2) / max_change;
|
|
add = (add * max + max_change / 2) / max_change;
|
|
del = total - add;
|
|
}
|
|
if (patch->is_binary)
|
|
printf(" %s%-*s | Bin\n", prefix, len, name);
|
|
else
|
|
printf(" %s%-*s |%5d %.*s%.*s\n", prefix,
|
|
len, name, patch->lines_added + patch->lines_deleted,
|
|
add, pluses, del, minuses);
|
|
free(qname);
|
|
}
|
|
|
|
static int read_old_data(struct stat *st, const char *path, char **buf_p, unsigned long *alloc_p, unsigned long *size_p)
|
|
{
|
|
int fd;
|
|
unsigned long got;
|
|
unsigned long nsize;
|
|
char *nbuf;
|
|
unsigned long size = *size_p;
|
|
char *buf = *buf_p;
|
|
|
|
switch (st->st_mode & S_IFMT) {
|
|
case S_IFLNK:
|
|
return readlink(path, buf, size) != size;
|
|
case S_IFREG:
|
|
fd = open(path, O_RDONLY);
|
|
if (fd < 0)
|
|
return error("unable to open %s", path);
|
|
got = 0;
|
|
for (;;) {
|
|
ssize_t ret = xread(fd, buf + got, size - got);
|
|
if (ret <= 0)
|
|
break;
|
|
got += ret;
|
|
}
|
|
close(fd);
|
|
nsize = got;
|
|
nbuf = convert_to_git(path, buf, &nsize);
|
|
if (nbuf) {
|
|
free(buf);
|
|
*buf_p = nbuf;
|
|
*alloc_p = nsize;
|
|
*size_p = nsize;
|
|
}
|
|
return got != size;
|
|
default:
|
|
return -1;
|
|
}
|
|
}
|
|
|
|
static int find_offset(const char *buf, unsigned long size, const char *fragment, unsigned long fragsize, int line, int *lines)
|
|
{
|
|
int i;
|
|
unsigned long start, backwards, forwards;
|
|
|
|
if (fragsize > size)
|
|
return -1;
|
|
|
|
start = 0;
|
|
if (line > 1) {
|
|
unsigned long offset = 0;
|
|
i = line-1;
|
|
while (offset + fragsize <= size) {
|
|
if (buf[offset++] == '\n') {
|
|
start = offset;
|
|
if (!--i)
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
/* Exact line number? */
|
|
if (!memcmp(buf + start, fragment, fragsize))
|
|
return start;
|
|
|
|
/*
|
|
* There's probably some smart way to do this, but I'll leave
|
|
* that to the smart and beautiful people. I'm simple and stupid.
|
|
*/
|
|
backwards = start;
|
|
forwards = start;
|
|
for (i = 0; ; i++) {
|
|
unsigned long try;
|
|
int n;
|
|
|
|
/* "backward" */
|
|
if (i & 1) {
|
|
if (!backwards) {
|
|
if (forwards + fragsize > size)
|
|
break;
|
|
continue;
|
|
}
|
|
do {
|
|
--backwards;
|
|
} while (backwards && buf[backwards-1] != '\n');
|
|
try = backwards;
|
|
} else {
|
|
while (forwards + fragsize <= size) {
|
|
if (buf[forwards++] == '\n')
|
|
break;
|
|
}
|
|
try = forwards;
|
|
}
|
|
|
|
if (try + fragsize > size)
|
|
continue;
|
|
if (memcmp(buf + try, fragment, fragsize))
|
|
continue;
|
|
n = (i >> 1)+1;
|
|
if (i & 1)
|
|
n = -n;
|
|
*lines = n;
|
|
return try;
|
|
}
|
|
|
|
/*
|
|
* We should start searching forward and backward.
|
|
*/
|
|
return -1;
|
|
}
|
|
|
|
static void remove_first_line(const char **rbuf, int *rsize)
|
|
{
|
|
const char *buf = *rbuf;
|
|
int size = *rsize;
|
|
unsigned long offset;
|
|
offset = 0;
|
|
while (offset <= size) {
|
|
if (buf[offset++] == '\n')
|
|
break;
|
|
}
|
|
*rsize = size - offset;
|
|
*rbuf = buf + offset;
|
|
}
|
|
|
|
static void remove_last_line(const char **rbuf, int *rsize)
|
|
{
|
|
const char *buf = *rbuf;
|
|
int size = *rsize;
|
|
unsigned long offset;
|
|
offset = size - 1;
|
|
while (offset > 0) {
|
|
if (buf[--offset] == '\n')
|
|
break;
|
|
}
|
|
*rsize = offset + 1;
|
|
}
|
|
|
|
struct buffer_desc {
|
|
char *buffer;
|
|
unsigned long size;
|
|
unsigned long alloc;
|
|
};
|
|
|
|
static int apply_line(char *output, const char *patch, int plen)
|
|
{
|
|
/* plen is number of bytes to be copied from patch,
|
|
* starting at patch+1 (patch[0] is '+'). Typically
|
|
* patch[plen] is '\n', unless this is the incomplete
|
|
* last line.
|
|
*/
|
|
int i;
|
|
int add_nl_to_tail = 0;
|
|
int fixed = 0;
|
|
int last_tab_in_indent = -1;
|
|
int last_space_in_indent = -1;
|
|
int need_fix_leading_space = 0;
|
|
char *buf;
|
|
|
|
if ((new_whitespace != strip_whitespace) || !whitespace_error ||
|
|
*patch != '+') {
|
|
memcpy(output, patch + 1, plen);
|
|
return plen;
|
|
}
|
|
|
|
if (1 < plen && isspace(patch[plen-1])) {
|
|
if (patch[plen] == '\n')
|
|
add_nl_to_tail = 1;
|
|
plen--;
|
|
while (0 < plen && isspace(patch[plen]))
|
|
plen--;
|
|
fixed = 1;
|
|
}
|
|
|
|
for (i = 1; i < plen; i++) {
|
|
char ch = patch[i];
|
|
if (ch == '\t') {
|
|
last_tab_in_indent = i;
|
|
if (0 <= last_space_in_indent)
|
|
need_fix_leading_space = 1;
|
|
}
|
|
else if (ch == ' ')
|
|
last_space_in_indent = i;
|
|
else
|
|
break;
|
|
}
|
|
|
|
buf = output;
|
|
if (need_fix_leading_space) {
|
|
/* between patch[1..last_tab_in_indent] strip the
|
|
* funny spaces, updating them to tab as needed.
|
|
*/
|
|
for (i = 1; i < last_tab_in_indent; i++, plen--) {
|
|
char ch = patch[i];
|
|
if (ch != ' ')
|
|
*output++ = ch;
|
|
else if ((i % 8) == 0)
|
|
*output++ = '\t';
|
|
}
|
|
fixed = 1;
|
|
i = last_tab_in_indent;
|
|
}
|
|
else
|
|
i = 1;
|
|
|
|
memcpy(output, patch + i, plen);
|
|
if (add_nl_to_tail)
|
|
output[plen++] = '\n';
|
|
if (fixed)
|
|
applied_after_fixing_ws++;
|
|
return output + plen - buf;
|
|
}
|
|
|
|
static int apply_one_fragment(struct buffer_desc *desc, struct fragment *frag, int inaccurate_eof)
|
|
{
|
|
int match_beginning, match_end;
|
|
char *buf = desc->buffer;
|
|
const char *patch = frag->patch;
|
|
int offset, size = frag->size;
|
|
char *old = xmalloc(size);
|
|
char *new = xmalloc(size);
|
|
const char *oldlines, *newlines;
|
|
int oldsize = 0, newsize = 0;
|
|
int new_blank_lines_at_end = 0;
|
|
unsigned long leading, trailing;
|
|
int pos, lines;
|
|
|
|
while (size > 0) {
|
|
char first;
|
|
int len = linelen(patch, size);
|
|
int plen;
|
|
int added_blank_line = 0;
|
|
|
|
if (!len)
|
|
break;
|
|
|
|
/*
|
|
* "plen" is how much of the line we should use for
|
|
* the actual patch data. Normally we just remove the
|
|
* first character on the line, but if the line is
|
|
* followed by "\ No newline", then we also remove the
|
|
* last one (which is the newline, of course).
|
|
*/
|
|
plen = len-1;
|
|
if (len < size && patch[len] == '\\')
|
|
plen--;
|
|
first = *patch;
|
|
if (apply_in_reverse) {
|
|
if (first == '-')
|
|
first = '+';
|
|
else if (first == '+')
|
|
first = '-';
|
|
}
|
|
|
|
switch (first) {
|
|
case '\n':
|
|
/* Newer GNU diff, empty context line */
|
|
if (plen < 0)
|
|
/* ... followed by '\No newline'; nothing */
|
|
break;
|
|
old[oldsize++] = '\n';
|
|
new[newsize++] = '\n';
|
|
break;
|
|
case ' ':
|
|
case '-':
|
|
memcpy(old + oldsize, patch + 1, plen);
|
|
oldsize += plen;
|
|
if (first == '-')
|
|
break;
|
|
/* Fall-through for ' ' */
|
|
case '+':
|
|
if (first != '+' || !no_add) {
|
|
int added = apply_line(new + newsize, patch,
|
|
plen);
|
|
newsize += added;
|
|
if (first == '+' &&
|
|
added == 1 && new[newsize-1] == '\n')
|
|
added_blank_line = 1;
|
|
}
|
|
break;
|
|
case '@': case '\\':
|
|
/* Ignore it, we already handled it */
|
|
break;
|
|
default:
|
|
if (apply_verbosely)
|
|
error("invalid start of line: '%c'", first);
|
|
return -1;
|
|
}
|
|
if (added_blank_line)
|
|
new_blank_lines_at_end++;
|
|
else
|
|
new_blank_lines_at_end = 0;
|
|
patch += len;
|
|
size -= len;
|
|
}
|
|
|
|
if (inaccurate_eof && oldsize > 0 && old[oldsize - 1] == '\n' &&
|
|
newsize > 0 && new[newsize - 1] == '\n') {
|
|
oldsize--;
|
|
newsize--;
|
|
}
|
|
|
|
oldlines = old;
|
|
newlines = new;
|
|
leading = frag->leading;
|
|
trailing = frag->trailing;
|
|
|
|
/*
|
|
* If we don't have any leading/trailing data in the patch,
|
|
* we want it to match at the beginning/end of the file.
|
|
*
|
|
* But that would break if the patch is generated with
|
|
* --unified=0; sane people wouldn't do that to cause us
|
|
* trouble, but we try to please not so sane ones as well.
|
|
*/
|
|
if (unidiff_zero) {
|
|
match_beginning = (!leading && !frag->oldpos);
|
|
match_end = 0;
|
|
}
|
|
else {
|
|
match_beginning = !leading && (frag->oldpos == 1);
|
|
match_end = !trailing;
|
|
}
|
|
|
|
lines = 0;
|
|
pos = frag->newpos;
|
|
for (;;) {
|
|
offset = find_offset(buf, desc->size,
|
|
oldlines, oldsize, pos, &lines);
|
|
if (match_end && offset + oldsize != desc->size)
|
|
offset = -1;
|
|
if (match_beginning && offset)
|
|
offset = -1;
|
|
if (offset >= 0) {
|
|
int diff;
|
|
unsigned long size, alloc;
|
|
|
|
if (new_whitespace == strip_whitespace &&
|
|
(desc->size - oldsize - offset == 0)) /* end of file? */
|
|
newsize -= new_blank_lines_at_end;
|
|
|
|
diff = newsize - oldsize;
|
|
size = desc->size + diff;
|
|
alloc = desc->alloc;
|
|
|
|
/* Warn if it was necessary to reduce the number
|
|
* of context lines.
|
|
*/
|
|
if ((leading != frag->leading) ||
|
|
(trailing != frag->trailing))
|
|
fprintf(stderr, "Context reduced to (%ld/%ld)"
|
|
" to apply fragment at %d\n",
|
|
leading, trailing, pos + lines);
|
|
|
|
if (size > alloc) {
|
|
alloc = size + 8192;
|
|
desc->alloc = alloc;
|
|
buf = xrealloc(buf, alloc);
|
|
desc->buffer = buf;
|
|
}
|
|
desc->size = size;
|
|
memmove(buf + offset + newsize,
|
|
buf + offset + oldsize,
|
|
size - offset - newsize);
|
|
memcpy(buf + offset, newlines, newsize);
|
|
offset = 0;
|
|
|
|
break;
|
|
}
|
|
|
|
/* Am I at my context limits? */
|
|
if ((leading <= p_context) && (trailing <= p_context))
|
|
break;
|
|
if (match_beginning || match_end) {
|
|
match_beginning = match_end = 0;
|
|
continue;
|
|
}
|
|
/* Reduce the number of context lines
|
|
* Reduce both leading and trailing if they are equal
|
|
* otherwise just reduce the larger context.
|
|
*/
|
|
if (leading >= trailing) {
|
|
remove_first_line(&oldlines, &oldsize);
|
|
remove_first_line(&newlines, &newsize);
|
|
pos--;
|
|
leading--;
|
|
}
|
|
if (trailing > leading) {
|
|
remove_last_line(&oldlines, &oldsize);
|
|
remove_last_line(&newlines, &newsize);
|
|
trailing--;
|
|
}
|
|
}
|
|
|
|
if (offset && apply_verbosely)
|
|
error("while searching for:\n%.*s", oldsize, oldlines);
|
|
|
|
free(old);
|
|
free(new);
|
|
return offset;
|
|
}
|
|
|
|
static int apply_binary_fragment(struct buffer_desc *desc, struct patch *patch)
|
|
{
|
|
unsigned long dst_size;
|
|
struct fragment *fragment = patch->fragments;
|
|
void *data;
|
|
void *result;
|
|
|
|
/* Binary patch is irreversible without the optional second hunk */
|
|
if (apply_in_reverse) {
|
|
if (!fragment->next)
|
|
return error("cannot reverse-apply a binary patch "
|
|
"without the reverse hunk to '%s'",
|
|
patch->new_name
|
|
? patch->new_name : patch->old_name);
|
|
fragment = fragment->next;
|
|
}
|
|
data = (void*) fragment->patch;
|
|
switch (fragment->binary_patch_method) {
|
|
case BINARY_DELTA_DEFLATED:
|
|
result = patch_delta(desc->buffer, desc->size,
|
|
data,
|
|
fragment->size,
|
|
&dst_size);
|
|
free(desc->buffer);
|
|
desc->buffer = result;
|
|
break;
|
|
case BINARY_LITERAL_DEFLATED:
|
|
free(desc->buffer);
|
|
desc->buffer = data;
|
|
dst_size = fragment->size;
|
|
break;
|
|
}
|
|
if (!desc->buffer)
|
|
return -1;
|
|
desc->size = desc->alloc = dst_size;
|
|
return 0;
|
|
}
|
|
|
|
static int apply_binary(struct buffer_desc *desc, struct patch *patch)
|
|
{
|
|
const char *name = patch->old_name ? patch->old_name : patch->new_name;
|
|
unsigned char sha1[20];
|
|
|
|
/* For safety, we require patch index line to contain
|
|
* full 40-byte textual SHA1 for old and new, at least for now.
|
|
*/
|
|
if (strlen(patch->old_sha1_prefix) != 40 ||
|
|
strlen(patch->new_sha1_prefix) != 40 ||
|
|
get_sha1_hex(patch->old_sha1_prefix, sha1) ||
|
|
get_sha1_hex(patch->new_sha1_prefix, sha1))
|
|
return error("cannot apply binary patch to '%s' "
|
|
"without full index line", name);
|
|
|
|
if (patch->old_name) {
|
|
/* See if the old one matches what the patch
|
|
* applies to.
|
|
*/
|
|
hash_sha1_file(desc->buffer, desc->size, blob_type, sha1);
|
|
if (strcmp(sha1_to_hex(sha1), patch->old_sha1_prefix))
|
|
return error("the patch applies to '%s' (%s), "
|
|
"which does not match the "
|
|
"current contents.",
|
|
name, sha1_to_hex(sha1));
|
|
}
|
|
else {
|
|
/* Otherwise, the old one must be empty. */
|
|
if (desc->size)
|
|
return error("the patch applies to an empty "
|
|
"'%s' but it is not empty", name);
|
|
}
|
|
|
|
get_sha1_hex(patch->new_sha1_prefix, sha1);
|
|
if (is_null_sha1(sha1)) {
|
|
free(desc->buffer);
|
|
desc->alloc = desc->size = 0;
|
|
desc->buffer = NULL;
|
|
return 0; /* deletion patch */
|
|
}
|
|
|
|
if (has_sha1_file(sha1)) {
|
|
/* We already have the postimage */
|
|
enum object_type type;
|
|
unsigned long size;
|
|
|
|
free(desc->buffer);
|
|
desc->buffer = read_sha1_file(sha1, &type, &size);
|
|
if (!desc->buffer)
|
|
return error("the necessary postimage %s for "
|
|
"'%s' cannot be read",
|
|
patch->new_sha1_prefix, name);
|
|
desc->alloc = desc->size = size;
|
|
}
|
|
else {
|
|
/* We have verified desc matches the preimage;
|
|
* apply the patch data to it, which is stored
|
|
* in the patch->fragments->{patch,size}.
|
|
*/
|
|
if (apply_binary_fragment(desc, patch))
|
|
return error("binary patch does not apply to '%s'",
|
|
name);
|
|
|
|
/* verify that the result matches */
|
|
hash_sha1_file(desc->buffer, desc->size, blob_type, sha1);
|
|
if (strcmp(sha1_to_hex(sha1), patch->new_sha1_prefix))
|
|
return error("binary patch to '%s' creates incorrect result (expecting %s, got %s)", name, patch->new_sha1_prefix, sha1_to_hex(sha1));
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int apply_fragments(struct buffer_desc *desc, struct patch *patch)
|
|
{
|
|
struct fragment *frag = patch->fragments;
|
|
const char *name = patch->old_name ? patch->old_name : patch->new_name;
|
|
|
|
if (patch->is_binary)
|
|
return apply_binary(desc, patch);
|
|
|
|
while (frag) {
|
|
if (apply_one_fragment(desc, frag, patch->inaccurate_eof)) {
|
|
error("patch failed: %s:%ld", name, frag->oldpos);
|
|
if (!apply_with_reject)
|
|
return -1;
|
|
frag->rejected = 1;
|
|
}
|
|
frag = frag->next;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static int apply_data(struct patch *patch, struct stat *st, struct cache_entry *ce)
|
|
{
|
|
char *buf;
|
|
unsigned long size, alloc;
|
|
struct buffer_desc desc;
|
|
|
|
size = 0;
|
|
alloc = 0;
|
|
buf = NULL;
|
|
if (cached) {
|
|
if (ce) {
|
|
enum object_type type;
|
|
buf = read_sha1_file(ce->sha1, &type, &size);
|
|
if (!buf)
|
|
return error("read of %s failed",
|
|
patch->old_name);
|
|
alloc = size;
|
|
}
|
|
}
|
|
else if (patch->old_name) {
|
|
size = xsize_t(st->st_size);
|
|
alloc = size + 8192;
|
|
buf = xmalloc(alloc);
|
|
if (read_old_data(st, patch->old_name, &buf, &alloc, &size))
|
|
return error("read of %s failed", patch->old_name);
|
|
}
|
|
|
|
desc.size = size;
|
|
desc.alloc = alloc;
|
|
desc.buffer = buf;
|
|
|
|
if (apply_fragments(&desc, patch) < 0)
|
|
return -1; /* note with --reject this succeeds. */
|
|
|
|
/* NUL terminate the result */
|
|
if (desc.alloc <= desc.size)
|
|
desc.buffer = xrealloc(desc.buffer, desc.size + 1);
|
|
desc.buffer[desc.size] = 0;
|
|
|
|
patch->result = desc.buffer;
|
|
patch->resultsize = desc.size;
|
|
|
|
if (0 < patch->is_delete && patch->resultsize)
|
|
return error("removal patch leaves file contents");
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int check_to_create_blob(const char *new_name, int ok_if_exists)
|
|
{
|
|
struct stat nst;
|
|
if (!lstat(new_name, &nst)) {
|
|
if (S_ISDIR(nst.st_mode) || ok_if_exists)
|
|
return 0;
|
|
/*
|
|
* A leading component of new_name might be a symlink
|
|
* that is going to be removed with this patch, but
|
|
* still pointing at somewhere that has the path.
|
|
* In such a case, path "new_name" does not exist as
|
|
* far as git is concerned.
|
|
*/
|
|
if (has_symlink_leading_path(new_name, NULL))
|
|
return 0;
|
|
|
|
return error("%s: already exists in working directory", new_name);
|
|
}
|
|
else if ((errno != ENOENT) && (errno != ENOTDIR))
|
|
return error("%s: %s", new_name, strerror(errno));
|
|
return 0;
|
|
}
|
|
|
|
static int check_patch(struct patch *patch, struct patch *prev_patch)
|
|
{
|
|
struct stat st;
|
|
const char *old_name = patch->old_name;
|
|
const char *new_name = patch->new_name;
|
|
const char *name = old_name ? old_name : new_name;
|
|
struct cache_entry *ce = NULL;
|
|
int ok_if_exists;
|
|
|
|
patch->rejected = 1; /* we will drop this after we succeed */
|
|
if (old_name) {
|
|
int changed = 0;
|
|
int stat_ret = 0;
|
|
unsigned st_mode = 0;
|
|
|
|
if (!cached)
|
|
stat_ret = lstat(old_name, &st);
|
|
if (check_index) {
|
|
int pos = cache_name_pos(old_name, strlen(old_name));
|
|
if (pos < 0)
|
|
return error("%s: does not exist in index",
|
|
old_name);
|
|
ce = active_cache[pos];
|
|
if (stat_ret < 0) {
|
|
struct checkout costate;
|
|
if (errno != ENOENT)
|
|
return error("%s: %s", old_name,
|
|
strerror(errno));
|
|
/* checkout */
|
|
costate.base_dir = "";
|
|
costate.base_dir_len = 0;
|
|
costate.force = 0;
|
|
costate.quiet = 0;
|
|
costate.not_new = 0;
|
|
costate.refresh_cache = 1;
|
|
if (checkout_entry(ce,
|
|
&costate,
|
|
NULL) ||
|
|
lstat(old_name, &st))
|
|
return -1;
|
|
}
|
|
if (!cached)
|
|
changed = ce_match_stat(ce, &st, 1);
|
|
if (changed)
|
|
return error("%s: does not match index",
|
|
old_name);
|
|
if (cached)
|
|
st_mode = ntohl(ce->ce_mode);
|
|
}
|
|
else if (stat_ret < 0)
|
|
return error("%s: %s", old_name, strerror(errno));
|
|
|
|
if (!cached)
|
|
st_mode = ntohl(ce_mode_from_stat(ce, st.st_mode));
|
|
|
|
if (patch->is_new < 0)
|
|
patch->is_new = 0;
|
|
if (!patch->old_mode)
|
|
patch->old_mode = st_mode;
|
|
if ((st_mode ^ patch->old_mode) & S_IFMT)
|
|
return error("%s: wrong type", old_name);
|
|
if (st_mode != patch->old_mode)
|
|
fprintf(stderr, "warning: %s has type %o, expected %o\n",
|
|
old_name, st_mode, patch->old_mode);
|
|
}
|
|
|
|
if (new_name && prev_patch && 0 < prev_patch->is_delete &&
|
|
!strcmp(prev_patch->old_name, new_name))
|
|
/* A type-change diff is always split into a patch to
|
|
* delete old, immediately followed by a patch to
|
|
* create new (see diff.c::run_diff()); in such a case
|
|
* it is Ok that the entry to be deleted by the
|
|
* previous patch is still in the working tree and in
|
|
* the index.
|
|
*/
|
|
ok_if_exists = 1;
|
|
else
|
|
ok_if_exists = 0;
|
|
|
|
if (new_name &&
|
|
((0 < patch->is_new) | (0 < patch->is_rename) | patch->is_copy)) {
|
|
if (check_index &&
|
|
cache_name_pos(new_name, strlen(new_name)) >= 0 &&
|
|
!ok_if_exists)
|
|
return error("%s: already exists in index", new_name);
|
|
if (!cached) {
|
|
int err = check_to_create_blob(new_name, ok_if_exists);
|
|
if (err)
|
|
return err;
|
|
}
|
|
if (!patch->new_mode) {
|
|
if (0 < patch->is_new)
|
|
patch->new_mode = S_IFREG | 0644;
|
|
else
|
|
patch->new_mode = patch->old_mode;
|
|
}
|
|
}
|
|
|
|
if (new_name && old_name) {
|
|
int same = !strcmp(old_name, new_name);
|
|
if (!patch->new_mode)
|
|
patch->new_mode = patch->old_mode;
|
|
if ((patch->old_mode ^ patch->new_mode) & S_IFMT)
|
|
return error("new mode (%o) of %s does not match old mode (%o)%s%s",
|
|
patch->new_mode, new_name, patch->old_mode,
|
|
same ? "" : " of ", same ? "" : old_name);
|
|
}
|
|
|
|
if (apply_data(patch, &st, ce) < 0)
|
|
return error("%s: patch does not apply", name);
|
|
patch->rejected = 0;
|
|
return 0;
|
|
}
|
|
|
|
static int check_patch_list(struct patch *patch)
|
|
{
|
|
struct patch *prev_patch = NULL;
|
|
int err = 0;
|
|
|
|
for (prev_patch = NULL; patch ; patch = patch->next) {
|
|
if (apply_verbosely)
|
|
say_patch_name(stderr,
|
|
"Checking patch ", patch, "...\n");
|
|
err |= check_patch(patch, prev_patch);
|
|
prev_patch = patch;
|
|
}
|
|
return err;
|
|
}
|
|
|
|
static void show_index_list(struct patch *list)
|
|
{
|
|
struct patch *patch;
|
|
|
|
/* Once we start supporting the reverse patch, it may be
|
|
* worth showing the new sha1 prefix, but until then...
|
|
*/
|
|
for (patch = list; patch; patch = patch->next) {
|
|
const unsigned char *sha1_ptr;
|
|
unsigned char sha1[20];
|
|
const char *name;
|
|
|
|
name = patch->old_name ? patch->old_name : patch->new_name;
|
|
if (0 < patch->is_new)
|
|
sha1_ptr = null_sha1;
|
|
else if (get_sha1(patch->old_sha1_prefix, sha1))
|
|
die("sha1 information is lacking or useless (%s).",
|
|
name);
|
|
else
|
|
sha1_ptr = sha1;
|
|
|
|
printf("%06o %s ",patch->old_mode, sha1_to_hex(sha1_ptr));
|
|
if (line_termination && quote_c_style(name, NULL, NULL, 0))
|
|
quote_c_style(name, NULL, stdout, 0);
|
|
else
|
|
fputs(name, stdout);
|
|
putchar(line_termination);
|
|
}
|
|
}
|
|
|
|
static void stat_patch_list(struct patch *patch)
|
|
{
|
|
int files, adds, dels;
|
|
|
|
for (files = adds = dels = 0 ; patch ; patch = patch->next) {
|
|
files++;
|
|
adds += patch->lines_added;
|
|
dels += patch->lines_deleted;
|
|
show_stats(patch);
|
|
}
|
|
|
|
printf(" %d files changed, %d insertions(+), %d deletions(-)\n", files, adds, dels);
|
|
}
|
|
|
|
static void numstat_patch_list(struct patch *patch)
|
|
{
|
|
for ( ; patch; patch = patch->next) {
|
|
const char *name;
|
|
name = patch->new_name ? patch->new_name : patch->old_name;
|
|
if (patch->is_binary)
|
|
printf("-\t-\t");
|
|
else
|
|
printf("%d\t%d\t",
|
|
patch->lines_added, patch->lines_deleted);
|
|
if (line_termination && quote_c_style(name, NULL, NULL, 0))
|
|
quote_c_style(name, NULL, stdout, 0);
|
|
else
|
|
fputs(name, stdout);
|
|
putchar(line_termination);
|
|
}
|
|
}
|
|
|
|
static void show_file_mode_name(const char *newdelete, unsigned int mode, const char *name)
|
|
{
|
|
if (mode)
|
|
printf(" %s mode %06o %s\n", newdelete, mode, name);
|
|
else
|
|
printf(" %s %s\n", newdelete, name);
|
|
}
|
|
|
|
static void show_mode_change(struct patch *p, int show_name)
|
|
{
|
|
if (p->old_mode && p->new_mode && p->old_mode != p->new_mode) {
|
|
if (show_name)
|
|
printf(" mode change %06o => %06o %s\n",
|
|
p->old_mode, p->new_mode, p->new_name);
|
|
else
|
|
printf(" mode change %06o => %06o\n",
|
|
p->old_mode, p->new_mode);
|
|
}
|
|
}
|
|
|
|
static void show_rename_copy(struct patch *p)
|
|
{
|
|
const char *renamecopy = p->is_rename ? "rename" : "copy";
|
|
const char *old, *new;
|
|
|
|
/* Find common prefix */
|
|
old = p->old_name;
|
|
new = p->new_name;
|
|
while (1) {
|
|
const char *slash_old, *slash_new;
|
|
slash_old = strchr(old, '/');
|
|
slash_new = strchr(new, '/');
|
|
if (!slash_old ||
|
|
!slash_new ||
|
|
slash_old - old != slash_new - new ||
|
|
memcmp(old, new, slash_new - new))
|
|
break;
|
|
old = slash_old + 1;
|
|
new = slash_new + 1;
|
|
}
|
|
/* p->old_name thru old is the common prefix, and old and new
|
|
* through the end of names are renames
|
|
*/
|
|
if (old != p->old_name)
|
|
printf(" %s %.*s{%s => %s} (%d%%)\n", renamecopy,
|
|
(int)(old - p->old_name), p->old_name,
|
|
old, new, p->score);
|
|
else
|
|
printf(" %s %s => %s (%d%%)\n", renamecopy,
|
|
p->old_name, p->new_name, p->score);
|
|
show_mode_change(p, 0);
|
|
}
|
|
|
|
static void summary_patch_list(struct patch *patch)
|
|
{
|
|
struct patch *p;
|
|
|
|
for (p = patch; p; p = p->next) {
|
|
if (p->is_new)
|
|
show_file_mode_name("create", p->new_mode, p->new_name);
|
|
else if (p->is_delete)
|
|
show_file_mode_name("delete", p->old_mode, p->old_name);
|
|
else {
|
|
if (p->is_rename || p->is_copy)
|
|
show_rename_copy(p);
|
|
else {
|
|
if (p->score) {
|
|
printf(" rewrite %s (%d%%)\n",
|
|
p->new_name, p->score);
|
|
show_mode_change(p, 0);
|
|
}
|
|
else
|
|
show_mode_change(p, 1);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
static void patch_stats(struct patch *patch)
|
|
{
|
|
int lines = patch->lines_added + patch->lines_deleted;
|
|
|
|
if (lines > max_change)
|
|
max_change = lines;
|
|
if (patch->old_name) {
|
|
int len = quote_c_style(patch->old_name, NULL, NULL, 0);
|
|
if (!len)
|
|
len = strlen(patch->old_name);
|
|
if (len > max_len)
|
|
max_len = len;
|
|
}
|
|
if (patch->new_name) {
|
|
int len = quote_c_style(patch->new_name, NULL, NULL, 0);
|
|
if (!len)
|
|
len = strlen(patch->new_name);
|
|
if (len > max_len)
|
|
max_len = len;
|
|
}
|
|
}
|
|
|
|
static void remove_file(struct patch *patch, int rmdir_empty)
|
|
{
|
|
if (update_index) {
|
|
if (remove_file_from_cache(patch->old_name) < 0)
|
|
die("unable to remove %s from index", patch->old_name);
|
|
cache_tree_invalidate_path(active_cache_tree, patch->old_name);
|
|
}
|
|
if (!cached) {
|
|
if (!unlink(patch->old_name) && rmdir_empty) {
|
|
char *name = xstrdup(patch->old_name);
|
|
char *end = strrchr(name, '/');
|
|
while (end) {
|
|
*end = 0;
|
|
if (rmdir(name))
|
|
break;
|
|
end = strrchr(name, '/');
|
|
}
|
|
free(name);
|
|
}
|
|
}
|
|
}
|
|
|
|
static void add_index_file(const char *path, unsigned mode, void *buf, unsigned long size)
|
|
{
|
|
struct stat st;
|
|
struct cache_entry *ce;
|
|
int namelen = strlen(path);
|
|
unsigned ce_size = cache_entry_size(namelen);
|
|
|
|
if (!update_index)
|
|
return;
|
|
|
|
ce = xcalloc(1, ce_size);
|
|
memcpy(ce->name, path, namelen);
|
|
ce->ce_mode = create_ce_mode(mode);
|
|
ce->ce_flags = htons(namelen);
|
|
if (!cached) {
|
|
if (lstat(path, &st) < 0)
|
|
die("unable to stat newly created file %s", path);
|
|
fill_stat_cache_info(ce, &st);
|
|
}
|
|
if (write_sha1_file(buf, size, blob_type, ce->sha1) < 0)
|
|
die("unable to create backing store for newly created file %s", path);
|
|
if (add_cache_entry(ce, ADD_CACHE_OK_TO_ADD) < 0)
|
|
die("unable to add cache entry for %s", path);
|
|
}
|
|
|
|
static int try_create_file(const char *path, unsigned int mode, const char *buf, unsigned long size)
|
|
{
|
|
int fd;
|
|
char *nbuf;
|
|
|
|
if (has_symlinks && S_ISLNK(mode))
|
|
/* Although buf:size is counted string, it also is NUL
|
|
* terminated.
|
|
*/
|
|
return symlink(buf, path);
|
|
|
|
fd = open(path, O_CREAT | O_EXCL | O_WRONLY, (mode & 0100) ? 0777 : 0666);
|
|
if (fd < 0)
|
|
return -1;
|
|
|
|
nbuf = convert_to_working_tree(path, buf, &size);
|
|
if (nbuf)
|
|
buf = nbuf;
|
|
|
|
while (size) {
|
|
int written = xwrite(fd, buf, size);
|
|
if (written < 0)
|
|
die("writing file %s: %s", path, strerror(errno));
|
|
if (!written)
|
|
die("out of space writing file %s", path);
|
|
buf += written;
|
|
size -= written;
|
|
}
|
|
if (close(fd) < 0)
|
|
die("closing file %s: %s", path, strerror(errno));
|
|
if (nbuf)
|
|
free(nbuf);
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* We optimistically assume that the directories exist,
|
|
* which is true 99% of the time anyway. If they don't,
|
|
* we create them and try again.
|
|
*/
|
|
static void create_one_file(char *path, unsigned mode, const char *buf, unsigned long size)
|
|
{
|
|
if (cached)
|
|
return;
|
|
if (!try_create_file(path, mode, buf, size))
|
|
return;
|
|
|
|
if (errno == ENOENT) {
|
|
if (safe_create_leading_directories(path))
|
|
return;
|
|
if (!try_create_file(path, mode, buf, size))
|
|
return;
|
|
}
|
|
|
|
if (errno == EEXIST || errno == EACCES) {
|
|
/* We may be trying to create a file where a directory
|
|
* used to be.
|
|
*/
|
|
struct stat st;
|
|
if (!lstat(path, &st) && (!S_ISDIR(st.st_mode) || !rmdir(path)))
|
|
errno = EEXIST;
|
|
}
|
|
|
|
if (errno == EEXIST) {
|
|
unsigned int nr = getpid();
|
|
|
|
for (;;) {
|
|
const char *newpath;
|
|
newpath = mkpath("%s~%u", path, nr);
|
|
if (!try_create_file(newpath, mode, buf, size)) {
|
|
if (!rename(newpath, path))
|
|
return;
|
|
unlink(newpath);
|
|
break;
|
|
}
|
|
if (errno != EEXIST)
|
|
break;
|
|
++nr;
|
|
}
|
|
}
|
|
die("unable to write file %s mode %o", path, mode);
|
|
}
|
|
|
|
static void create_file(struct patch *patch)
|
|
{
|
|
char *path = patch->new_name;
|
|
unsigned mode = patch->new_mode;
|
|
unsigned long size = patch->resultsize;
|
|
char *buf = patch->result;
|
|
|
|
if (!mode)
|
|
mode = S_IFREG | 0644;
|
|
create_one_file(path, mode, buf, size);
|
|
add_index_file(path, mode, buf, size);
|
|
cache_tree_invalidate_path(active_cache_tree, path);
|
|
}
|
|
|
|
/* phase zero is to remove, phase one is to create */
|
|
static void write_out_one_result(struct patch *patch, int phase)
|
|
{
|
|
if (patch->is_delete > 0) {
|
|
if (phase == 0)
|
|
remove_file(patch, 1);
|
|
return;
|
|
}
|
|
if (patch->is_new > 0 || patch->is_copy) {
|
|
if (phase == 1)
|
|
create_file(patch);
|
|
return;
|
|
}
|
|
/*
|
|
* Rename or modification boils down to the same
|
|
* thing: remove the old, write the new
|
|
*/
|
|
if (phase == 0)
|
|
remove_file(patch, 0);
|
|
if (phase == 1)
|
|
create_file(patch);
|
|
}
|
|
|
|
static int write_out_one_reject(struct patch *patch)
|
|
{
|
|
FILE *rej;
|
|
char namebuf[PATH_MAX];
|
|
struct fragment *frag;
|
|
int cnt = 0;
|
|
|
|
for (cnt = 0, frag = patch->fragments; frag; frag = frag->next) {
|
|
if (!frag->rejected)
|
|
continue;
|
|
cnt++;
|
|
}
|
|
|
|
if (!cnt) {
|
|
if (apply_verbosely)
|
|
say_patch_name(stderr,
|
|
"Applied patch ", patch, " cleanly.\n");
|
|
return 0;
|
|
}
|
|
|
|
/* This should not happen, because a removal patch that leaves
|
|
* contents are marked "rejected" at the patch level.
|
|
*/
|
|
if (!patch->new_name)
|
|
die("internal error");
|
|
|
|
/* Say this even without --verbose */
|
|
say_patch_name(stderr, "Applying patch ", patch, " with");
|
|
fprintf(stderr, " %d rejects...\n", cnt);
|
|
|
|
cnt = strlen(patch->new_name);
|
|
if (ARRAY_SIZE(namebuf) <= cnt + 5) {
|
|
cnt = ARRAY_SIZE(namebuf) - 5;
|
|
fprintf(stderr,
|
|
"warning: truncating .rej filename to %.*s.rej",
|
|
cnt - 1, patch->new_name);
|
|
}
|
|
memcpy(namebuf, patch->new_name, cnt);
|
|
memcpy(namebuf + cnt, ".rej", 5);
|
|
|
|
rej = fopen(namebuf, "w");
|
|
if (!rej)
|
|
return error("cannot open %s: %s", namebuf, strerror(errno));
|
|
|
|
/* Normal git tools never deal with .rej, so do not pretend
|
|
* this is a git patch by saying --git nor give extended
|
|
* headers. While at it, maybe please "kompare" that wants
|
|
* the trailing TAB and some garbage at the end of line ;-).
|
|
*/
|
|
fprintf(rej, "diff a/%s b/%s\t(rejected hunks)\n",
|
|
patch->new_name, patch->new_name);
|
|
for (cnt = 1, frag = patch->fragments;
|
|
frag;
|
|
cnt++, frag = frag->next) {
|
|
if (!frag->rejected) {
|
|
fprintf(stderr, "Hunk #%d applied cleanly.\n", cnt);
|
|
continue;
|
|
}
|
|
fprintf(stderr, "Rejected hunk #%d.\n", cnt);
|
|
fprintf(rej, "%.*s", frag->size, frag->patch);
|
|
if (frag->patch[frag->size-1] != '\n')
|
|
fputc('\n', rej);
|
|
}
|
|
fclose(rej);
|
|
return -1;
|
|
}
|
|
|
|
static int write_out_results(struct patch *list, int skipped_patch)
|
|
{
|
|
int phase;
|
|
int errs = 0;
|
|
struct patch *l;
|
|
|
|
if (!list && !skipped_patch)
|
|
return error("No changes");
|
|
|
|
for (phase = 0; phase < 2; phase++) {
|
|
l = list;
|
|
while (l) {
|
|
if (l->rejected)
|
|
errs = 1;
|
|
else {
|
|
write_out_one_result(l, phase);
|
|
if (phase == 1 && write_out_one_reject(l))
|
|
errs = 1;
|
|
}
|
|
l = l->next;
|
|
}
|
|
}
|
|
return errs;
|
|
}
|
|
|
|
static struct lock_file lock_file;
|
|
|
|
static struct excludes {
|
|
struct excludes *next;
|
|
const char *path;
|
|
} *excludes;
|
|
|
|
static int use_patch(struct patch *p)
|
|
{
|
|
const char *pathname = p->new_name ? p->new_name : p->old_name;
|
|
struct excludes *x = excludes;
|
|
while (x) {
|
|
if (fnmatch(x->path, pathname, 0) == 0)
|
|
return 0;
|
|
x = x->next;
|
|
}
|
|
if (0 < prefix_length) {
|
|
int pathlen = strlen(pathname);
|
|
if (pathlen <= prefix_length ||
|
|
memcmp(prefix, pathname, prefix_length))
|
|
return 0;
|
|
}
|
|
return 1;
|
|
}
|
|
|
|
static void prefix_one(char **name)
|
|
{
|
|
char *old_name = *name;
|
|
if (!old_name)
|
|
return;
|
|
*name = xstrdup(prefix_filename(prefix, prefix_length, *name));
|
|
free(old_name);
|
|
}
|
|
|
|
static void prefix_patches(struct patch *p)
|
|
{
|
|
if (!prefix || p->is_toplevel_relative)
|
|
return;
|
|
for ( ; p; p = p->next) {
|
|
if (p->new_name == p->old_name) {
|
|
char *prefixed = p->new_name;
|
|
prefix_one(&prefixed);
|
|
p->new_name = p->old_name = prefixed;
|
|
}
|
|
else {
|
|
prefix_one(&p->new_name);
|
|
prefix_one(&p->old_name);
|
|
}
|
|
}
|
|
}
|
|
|
|
static int apply_patch(int fd, const char *filename, int inaccurate_eof)
|
|
{
|
|
unsigned long offset, size;
|
|
char *buffer = read_patch_file(fd, &size);
|
|
struct patch *list = NULL, **listp = &list;
|
|
int skipped_patch = 0;
|
|
|
|
patch_input_file = filename;
|
|
if (!buffer)
|
|
return -1;
|
|
offset = 0;
|
|
while (size > 0) {
|
|
struct patch *patch;
|
|
int nr;
|
|
|
|
patch = xcalloc(1, sizeof(*patch));
|
|
patch->inaccurate_eof = inaccurate_eof;
|
|
nr = parse_chunk(buffer + offset, size, patch);
|
|
if (nr < 0)
|
|
break;
|
|
if (apply_in_reverse)
|
|
reverse_patches(patch);
|
|
if (prefix)
|
|
prefix_patches(patch);
|
|
if (use_patch(patch)) {
|
|
patch_stats(patch);
|
|
*listp = patch;
|
|
listp = &patch->next;
|
|
}
|
|
else {
|
|
/* perhaps free it a bit better? */
|
|
free(patch);
|
|
skipped_patch++;
|
|
}
|
|
offset += nr;
|
|
size -= nr;
|
|
}
|
|
|
|
if (whitespace_error && (new_whitespace == error_on_whitespace))
|
|
apply = 0;
|
|
|
|
update_index = check_index && apply;
|
|
if (update_index && newfd < 0)
|
|
newfd = hold_locked_index(&lock_file, 1);
|
|
|
|
if (check_index) {
|
|
if (read_cache() < 0)
|
|
die("unable to read index file");
|
|
}
|
|
|
|
if ((check || apply) &&
|
|
check_patch_list(list) < 0 &&
|
|
!apply_with_reject)
|
|
exit(1);
|
|
|
|
if (apply && write_out_results(list, skipped_patch))
|
|
exit(1);
|
|
|
|
if (show_index_info)
|
|
show_index_list(list);
|
|
|
|
if (diffstat)
|
|
stat_patch_list(list);
|
|
|
|
if (numstat)
|
|
numstat_patch_list(list);
|
|
|
|
if (summary)
|
|
summary_patch_list(list);
|
|
|
|
free(buffer);
|
|
return 0;
|
|
}
|
|
|
|
static int git_apply_config(const char *var, const char *value)
|
|
{
|
|
if (!strcmp(var, "apply.whitespace")) {
|
|
apply_default_whitespace = xstrdup(value);
|
|
return 0;
|
|
}
|
|
return git_default_config(var, value);
|
|
}
|
|
|
|
|
|
int cmd_apply(int argc, const char **argv, const char *unused_prefix)
|
|
{
|
|
int i;
|
|
int read_stdin = 1;
|
|
int inaccurate_eof = 0;
|
|
int errs = 0;
|
|
int is_not_gitdir = 0;
|
|
|
|
const char *whitespace_option = NULL;
|
|
|
|
prefix = setup_git_directory_gently(&is_not_gitdir);
|
|
prefix_length = prefix ? strlen(prefix) : 0;
|
|
git_config(git_apply_config);
|
|
if (apply_default_whitespace)
|
|
parse_whitespace_option(apply_default_whitespace);
|
|
|
|
for (i = 1; i < argc; i++) {
|
|
const char *arg = argv[i];
|
|
char *end;
|
|
int fd;
|
|
|
|
if (!strcmp(arg, "-")) {
|
|
errs |= apply_patch(0, "<stdin>", inaccurate_eof);
|
|
read_stdin = 0;
|
|
continue;
|
|
}
|
|
if (!prefixcmp(arg, "--exclude=")) {
|
|
struct excludes *x = xmalloc(sizeof(*x));
|
|
x->path = arg + 10;
|
|
x->next = excludes;
|
|
excludes = x;
|
|
continue;
|
|
}
|
|
if (!prefixcmp(arg, "-p")) {
|
|
p_value = atoi(arg + 2);
|
|
p_value_known = 1;
|
|
continue;
|
|
}
|
|
if (!strcmp(arg, "--no-add")) {
|
|
no_add = 1;
|
|
continue;
|
|
}
|
|
if (!strcmp(arg, "--stat")) {
|
|
apply = 0;
|
|
diffstat = 1;
|
|
continue;
|
|
}
|
|
if (!strcmp(arg, "--allow-binary-replacement") ||
|
|
!strcmp(arg, "--binary")) {
|
|
continue; /* now no-op */
|
|
}
|
|
if (!strcmp(arg, "--numstat")) {
|
|
apply = 0;
|
|
numstat = 1;
|
|
continue;
|
|
}
|
|
if (!strcmp(arg, "--summary")) {
|
|
apply = 0;
|
|
summary = 1;
|
|
continue;
|
|
}
|
|
if (!strcmp(arg, "--check")) {
|
|
apply = 0;
|
|
check = 1;
|
|
continue;
|
|
}
|
|
if (!strcmp(arg, "--index")) {
|
|
if (is_not_gitdir)
|
|
die("--index outside a repository");
|
|
check_index = 1;
|
|
continue;
|
|
}
|
|
if (!strcmp(arg, "--cached")) {
|
|
if (is_not_gitdir)
|
|
die("--cached outside a repository");
|
|
check_index = 1;
|
|
cached = 1;
|
|
continue;
|
|
}
|
|
if (!strcmp(arg, "--apply")) {
|
|
apply = 1;
|
|
continue;
|
|
}
|
|
if (!strcmp(arg, "--index-info")) {
|
|
apply = 0;
|
|
show_index_info = 1;
|
|
continue;
|
|
}
|
|
if (!strcmp(arg, "-z")) {
|
|
line_termination = 0;
|
|
continue;
|
|
}
|
|
if (!prefixcmp(arg, "-C")) {
|
|
p_context = strtoul(arg + 2, &end, 0);
|
|
if (*end != '\0')
|
|
die("unrecognized context count '%s'", arg + 2);
|
|
continue;
|
|
}
|
|
if (!prefixcmp(arg, "--whitespace=")) {
|
|
whitespace_option = arg + 13;
|
|
parse_whitespace_option(arg + 13);
|
|
continue;
|
|
}
|
|
if (!strcmp(arg, "-R") || !strcmp(arg, "--reverse")) {
|
|
apply_in_reverse = 1;
|
|
continue;
|
|
}
|
|
if (!strcmp(arg, "--unidiff-zero")) {
|
|
unidiff_zero = 1;
|
|
continue;
|
|
}
|
|
if (!strcmp(arg, "--reject")) {
|
|
apply = apply_with_reject = apply_verbosely = 1;
|
|
continue;
|
|
}
|
|
if (!strcmp(arg, "-v") || !strcmp(arg, "--verbose")) {
|
|
apply_verbosely = 1;
|
|
continue;
|
|
}
|
|
if (!strcmp(arg, "--inaccurate-eof")) {
|
|
inaccurate_eof = 1;
|
|
continue;
|
|
}
|
|
if (0 < prefix_length)
|
|
arg = prefix_filename(prefix, prefix_length, arg);
|
|
|
|
fd = open(arg, O_RDONLY);
|
|
if (fd < 0)
|
|
usage(apply_usage);
|
|
read_stdin = 0;
|
|
set_default_whitespace_mode(whitespace_option);
|
|
errs |= apply_patch(fd, arg, inaccurate_eof);
|
|
close(fd);
|
|
}
|
|
set_default_whitespace_mode(whitespace_option);
|
|
if (read_stdin)
|
|
errs |= apply_patch(0, "<stdin>", inaccurate_eof);
|
|
if (whitespace_error) {
|
|
if (squelch_whitespace_errors &&
|
|
squelch_whitespace_errors < whitespace_error) {
|
|
int squelched =
|
|
whitespace_error - squelch_whitespace_errors;
|
|
fprintf(stderr, "warning: squelched %d "
|
|
"whitespace error%s\n",
|
|
squelched,
|
|
squelched == 1 ? "" : "s");
|
|
}
|
|
if (new_whitespace == error_on_whitespace)
|
|
die("%d line%s add%s whitespace errors.",
|
|
whitespace_error,
|
|
whitespace_error == 1 ? "" : "s",
|
|
whitespace_error == 1 ? "s" : "");
|
|
if (applied_after_fixing_ws)
|
|
fprintf(stderr, "warning: %d line%s applied after"
|
|
" fixing whitespace errors.\n",
|
|
applied_after_fixing_ws,
|
|
applied_after_fixing_ws == 1 ? "" : "s");
|
|
else if (whitespace_error)
|
|
fprintf(stderr, "warning: %d line%s add%s whitespace errors.\n",
|
|
whitespace_error,
|
|
whitespace_error == 1 ? "" : "s",
|
|
whitespace_error == 1 ? "s" : "");
|
|
}
|
|
|
|
if (update_index) {
|
|
if (write_cache(newfd, active_cache, active_nr) ||
|
|
close(newfd) || commit_locked_index(&lock_file))
|
|
die("Unable to write new index file");
|
|
}
|
|
|
|
return !!errs;
|
|
}
|