mirror of
https://github.com/git/git.git
synced 2024-11-27 20:14:30 +08:00
000182eacf
You can ask to print out "raw" format (full headers, full body), "medium" format (author and date, full body) or "short" format (author only, condensed body). Use "git-rev-list --pretty=short HEAD | less -S" for an example.
540 lines
12 KiB
C
540 lines
12 KiB
C
#include <ctype.h>
|
|
#include "cache.h"
|
|
#include "diff.h"
|
|
#include "commit.h"
|
|
|
|
static int show_root_diff = 0;
|
|
static int verbose_header = 0;
|
|
static int ignore_merges = 1;
|
|
static int recursive = 0;
|
|
static int show_tree_entry_in_recursive = 0;
|
|
static int read_stdin = 0;
|
|
static int diff_output_format = DIFF_FORMAT_HUMAN;
|
|
static int detect_rename = 0;
|
|
static int diff_setup_opt = 0;
|
|
static int diff_score_opt = 0;
|
|
static const char *pickaxe = NULL;
|
|
static int pickaxe_opts = 0;
|
|
static int diff_break_opt = -1;
|
|
static const char *orderfile = NULL;
|
|
static const char *header = NULL;
|
|
static const char *header_prefix = "";
|
|
static enum cmit_fmt commit_format = CMIT_FMT_RAW;
|
|
|
|
// What paths are we interested in?
|
|
static int nr_paths = 0;
|
|
static const char **paths = NULL;
|
|
static int *pathlens = NULL;
|
|
|
|
static int diff_tree_sha1(const unsigned char *old, const unsigned char *new, const char *base);
|
|
|
|
static void update_tree_entry(void **bufp, unsigned long *sizep)
|
|
{
|
|
void *buf = *bufp;
|
|
unsigned long size = *sizep;
|
|
int len = strlen(buf) + 1 + 20;
|
|
|
|
if (size < len)
|
|
die("corrupt tree file");
|
|
*bufp = buf + len;
|
|
*sizep = size - len;
|
|
}
|
|
|
|
static const unsigned char *extract(void *tree, unsigned long size, const char **pathp, unsigned int *modep)
|
|
{
|
|
int len = strlen(tree)+1;
|
|
const unsigned char *sha1 = tree + len;
|
|
const char *path = strchr(tree, ' ');
|
|
unsigned int mode;
|
|
|
|
if (!path || size < len + 20 || sscanf(tree, "%o", &mode) != 1)
|
|
die("corrupt tree file");
|
|
*pathp = path+1;
|
|
*modep = DIFF_FILE_CANON_MODE(mode);
|
|
return sha1;
|
|
}
|
|
|
|
static char *malloc_base(const char *base, const char *path, int pathlen)
|
|
{
|
|
int baselen = strlen(base);
|
|
char *newbase = xmalloc(baselen + pathlen + 2);
|
|
memcpy(newbase, base, baselen);
|
|
memcpy(newbase + baselen, path, pathlen);
|
|
memcpy(newbase + baselen + pathlen, "/", 2);
|
|
return newbase;
|
|
}
|
|
|
|
static void show_file(const char *prefix, void *tree, unsigned long size, const char *base);
|
|
static void show_tree(const char *prefix, void *tree, unsigned long size, const char *base);
|
|
|
|
/* A file entry went away or appeared */
|
|
static void show_file(const char *prefix, void *tree, unsigned long size, const char *base)
|
|
{
|
|
unsigned mode;
|
|
const char *path;
|
|
const unsigned char *sha1 = extract(tree, size, &path, &mode);
|
|
|
|
if (recursive && S_ISDIR(mode)) {
|
|
char type[20];
|
|
unsigned long size;
|
|
char *newbase = malloc_base(base, path, strlen(path));
|
|
void *tree;
|
|
|
|
tree = read_sha1_file(sha1, type, &size);
|
|
if (!tree || strcmp(type, "tree"))
|
|
die("corrupt tree sha %s", sha1_to_hex(sha1));
|
|
|
|
show_tree(prefix, tree, size, newbase);
|
|
|
|
free(tree);
|
|
free(newbase);
|
|
return;
|
|
}
|
|
|
|
diff_addremove(prefix[0], mode, sha1, base, path);
|
|
}
|
|
|
|
static int compare_tree_entry(void *tree1, unsigned long size1, void *tree2, unsigned long size2, const char *base)
|
|
{
|
|
unsigned mode1, mode2;
|
|
const char *path1, *path2;
|
|
const unsigned char *sha1, *sha2;
|
|
int cmp, pathlen1, pathlen2;
|
|
|
|
sha1 = extract(tree1, size1, &path1, &mode1);
|
|
sha2 = extract(tree2, size2, &path2, &mode2);
|
|
|
|
pathlen1 = strlen(path1);
|
|
pathlen2 = strlen(path2);
|
|
cmp = base_name_compare(path1, pathlen1, mode1, path2, pathlen2, mode2);
|
|
if (cmp < 0) {
|
|
show_file("-", tree1, size1, base);
|
|
return -1;
|
|
}
|
|
if (cmp > 0) {
|
|
show_file("+", tree2, size2, base);
|
|
return 1;
|
|
}
|
|
if (!memcmp(sha1, sha2, 20) && mode1 == mode2)
|
|
return 0;
|
|
|
|
/*
|
|
* If the filemode has changed to/from a directory from/to a regular
|
|
* file, we need to consider it a remove and an add.
|
|
*/
|
|
if (S_ISDIR(mode1) != S_ISDIR(mode2)) {
|
|
show_file("-", tree1, size1, base);
|
|
show_file("+", tree2, size2, base);
|
|
return 0;
|
|
}
|
|
|
|
if (recursive && S_ISDIR(mode1)) {
|
|
int retval;
|
|
char *newbase = malloc_base(base, path1, pathlen1);
|
|
if (show_tree_entry_in_recursive)
|
|
diff_change(mode1, mode2, sha1, sha2, base, path1);
|
|
retval = diff_tree_sha1(sha1, sha2, newbase);
|
|
free(newbase);
|
|
return retval;
|
|
}
|
|
|
|
diff_change(mode1, mode2, sha1, sha2, base, path1);
|
|
return 0;
|
|
}
|
|
|
|
static int interesting(void *tree, unsigned long size, const char *base)
|
|
{
|
|
const char *path;
|
|
unsigned mode;
|
|
int i;
|
|
int baselen, pathlen;
|
|
|
|
if (!nr_paths)
|
|
return 1;
|
|
|
|
(void)extract(tree, size, &path, &mode);
|
|
|
|
pathlen = strlen(path);
|
|
baselen = strlen(base);
|
|
|
|
for (i=0; i < nr_paths; i++) {
|
|
const char *match = paths[i];
|
|
int matchlen = pathlens[i];
|
|
|
|
if (baselen >= matchlen) {
|
|
/* If it doesn't match, move along... */
|
|
if (strncmp(base, match, matchlen))
|
|
continue;
|
|
|
|
/* The base is a subdirectory of a path which was specified. */
|
|
return 1;
|
|
}
|
|
|
|
/* Does the base match? */
|
|
if (strncmp(base, match, baselen))
|
|
continue;
|
|
|
|
match += baselen;
|
|
matchlen -= baselen;
|
|
|
|
if (pathlen > matchlen)
|
|
continue;
|
|
|
|
if (matchlen > pathlen) {
|
|
if (match[pathlen] != '/')
|
|
continue;
|
|
if (!S_ISDIR(mode))
|
|
continue;
|
|
}
|
|
|
|
if (strncmp(path, match, pathlen))
|
|
continue;
|
|
|
|
return 1;
|
|
}
|
|
return 0; /* No matches */
|
|
}
|
|
|
|
/* A whole sub-tree went away or appeared */
|
|
static void show_tree(const char *prefix, void *tree, unsigned long size, const char *base)
|
|
{
|
|
while (size) {
|
|
if (interesting(tree, size, base))
|
|
show_file(prefix, tree, size, base);
|
|
update_tree_entry(&tree, &size);
|
|
}
|
|
}
|
|
|
|
static int diff_tree(void *tree1, unsigned long size1, void *tree2, unsigned long size2, const char *base)
|
|
{
|
|
while (size1 | size2) {
|
|
if (nr_paths && size1 && !interesting(tree1, size1, base)) {
|
|
update_tree_entry(&tree1, &size1);
|
|
continue;
|
|
}
|
|
if (nr_paths && size2 && !interesting(tree2, size2, base)) {
|
|
update_tree_entry(&tree2, &size2);
|
|
continue;
|
|
}
|
|
if (!size1) {
|
|
show_file("+", tree2, size2, base);
|
|
update_tree_entry(&tree2, &size2);
|
|
continue;
|
|
}
|
|
if (!size2) {
|
|
show_file("-", tree1, size1, base);
|
|
update_tree_entry(&tree1, &size1);
|
|
continue;
|
|
}
|
|
switch (compare_tree_entry(tree1, size1, tree2, size2, base)) {
|
|
case -1:
|
|
update_tree_entry(&tree1, &size1);
|
|
continue;
|
|
case 0:
|
|
update_tree_entry(&tree1, &size1);
|
|
/* Fallthrough */
|
|
case 1:
|
|
update_tree_entry(&tree2, &size2);
|
|
continue;
|
|
}
|
|
die("git-diff-tree: internal error");
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static int diff_tree_sha1(const unsigned char *old, const unsigned char *new, const char *base)
|
|
{
|
|
void *tree1, *tree2;
|
|
unsigned long size1, size2;
|
|
int retval;
|
|
|
|
tree1 = read_object_with_reference(old, "tree", &size1, NULL);
|
|
if (!tree1)
|
|
die("unable to read source tree (%s)", sha1_to_hex(old));
|
|
tree2 = read_object_with_reference(new, "tree", &size2, NULL);
|
|
if (!tree2)
|
|
die("unable to read destination tree (%s)", sha1_to_hex(new));
|
|
retval = diff_tree(tree1, size1, tree2, size2, base);
|
|
free(tree1);
|
|
free(tree2);
|
|
return retval;
|
|
}
|
|
|
|
static void call_diff_setup(void)
|
|
{
|
|
diff_setup(diff_setup_opt);
|
|
}
|
|
|
|
static int call_diff_flush(void)
|
|
{
|
|
diffcore_std(0,
|
|
detect_rename, diff_score_opt,
|
|
pickaxe, pickaxe_opts,
|
|
diff_break_opt,
|
|
orderfile);
|
|
if (diff_queue_is_empty()) {
|
|
diff_flush(DIFF_FORMAT_NO_OUTPUT, 0);
|
|
return 0;
|
|
}
|
|
if (header) {
|
|
const char *fmt = "%s";
|
|
if (diff_output_format == DIFF_FORMAT_MACHINE)
|
|
fmt = "%s%c";
|
|
|
|
printf(fmt, header, 0);
|
|
header = NULL;
|
|
}
|
|
diff_flush(diff_output_format, 1);
|
|
return 1;
|
|
}
|
|
|
|
static int diff_tree_sha1_top(const unsigned char *old,
|
|
const unsigned char *new, const char *base)
|
|
{
|
|
int ret;
|
|
|
|
call_diff_setup();
|
|
ret = diff_tree_sha1(old, new, base);
|
|
call_diff_flush();
|
|
return ret;
|
|
}
|
|
|
|
static int diff_root_tree(const unsigned char *new, const char *base)
|
|
{
|
|
int retval;
|
|
void *tree;
|
|
unsigned long size;
|
|
|
|
call_diff_setup();
|
|
tree = read_object_with_reference(new, "tree", &size, NULL);
|
|
if (!tree)
|
|
die("unable to read root tree (%s)", sha1_to_hex(new));
|
|
retval = diff_tree("", 0, tree, size, base);
|
|
free(tree);
|
|
call_diff_flush();
|
|
return retval;
|
|
}
|
|
|
|
static char *generate_header(const char *commit, const char *parent, const char *msg, unsigned long len)
|
|
{
|
|
static char this_header[16384];
|
|
int offset;
|
|
|
|
offset = sprintf(this_header, "%s%s (from %s)\n", header_prefix, commit, parent);
|
|
if (verbose_header) {
|
|
offset += pretty_print_commit(commit_format, msg, len, this_header + offset, sizeof(this_header) - offset);
|
|
this_header[offset++] = '\n';
|
|
this_header[offset++] = 0;
|
|
}
|
|
|
|
return this_header;
|
|
}
|
|
|
|
static int diff_tree_commit(const unsigned char *commit, const char *name)
|
|
{
|
|
unsigned long size, offset;
|
|
char *buf = read_object_with_reference(commit, "commit", &size, NULL);
|
|
|
|
if (!buf)
|
|
return -1;
|
|
|
|
if (!name) {
|
|
static char commit_name[60];
|
|
strcpy(commit_name, sha1_to_hex(commit));
|
|
name = commit_name;
|
|
}
|
|
|
|
/* Root commit? */
|
|
if (show_root_diff && memcmp(buf + 46, "parent ", 7)) {
|
|
header = generate_header(name, "root", buf, size);
|
|
diff_root_tree(commit, "");
|
|
}
|
|
|
|
/* More than one parent? */
|
|
if (ignore_merges) {
|
|
if (!memcmp(buf + 46 + 48, "parent ", 7))
|
|
return 0;
|
|
}
|
|
|
|
offset = 46;
|
|
while (offset + 48 < size && !memcmp(buf + offset, "parent ", 7)) {
|
|
unsigned char parent[20];
|
|
if (get_sha1_hex(buf + offset + 7, parent))
|
|
return -1;
|
|
header = generate_header(name, sha1_to_hex(parent), buf, size);
|
|
diff_tree_sha1_top(parent, commit, "");
|
|
if (!header && verbose_header) {
|
|
header_prefix = "\ndiff-tree ";
|
|
/*
|
|
* Don't print multiple merge entries if we
|
|
* don't print the diffs.
|
|
*/
|
|
}
|
|
offset += 48;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static int diff_tree_stdin(char *line)
|
|
{
|
|
int len = strlen(line);
|
|
unsigned char commit[20], parent[20];
|
|
static char this_header[1000];
|
|
|
|
if (!len || line[len-1] != '\n')
|
|
return -1;
|
|
line[len-1] = 0;
|
|
if (get_sha1_hex(line, commit))
|
|
return -1;
|
|
if (isspace(line[40]) && !get_sha1_hex(line+41, parent)) {
|
|
line[40] = 0;
|
|
line[81] = 0;
|
|
sprintf(this_header, "%s (from %s)\n", line, line+41);
|
|
header = this_header;
|
|
return diff_tree_sha1_top(parent, commit, "");
|
|
}
|
|
line[40] = 0;
|
|
return diff_tree_commit(commit, line);
|
|
}
|
|
|
|
static char *diff_tree_usage =
|
|
"git-diff-tree [-p] [-r] [-z] [--stdin] [-M] [-C] [-R] [-S<string>] [-O<orderfile>] [-m] [-s] [-v] [-t] <tree-ish> <tree-ish>";
|
|
|
|
int main(int argc, const char **argv)
|
|
{
|
|
int nr_sha1;
|
|
char line[1000];
|
|
unsigned char sha1[2][20];
|
|
|
|
nr_sha1 = 0;
|
|
for (;;) {
|
|
const char *arg;
|
|
|
|
argv++;
|
|
argc--;
|
|
arg = *argv;
|
|
if (!arg)
|
|
break;
|
|
|
|
if (*arg != '-') {
|
|
if (nr_sha1 < 2 && !get_sha1(arg, sha1[nr_sha1])) {
|
|
nr_sha1++;
|
|
continue;
|
|
}
|
|
break;
|
|
}
|
|
|
|
if (!strcmp(arg, "--")) {
|
|
argv++;
|
|
argc--;
|
|
break;
|
|
}
|
|
if (!strcmp(arg, "-r")) {
|
|
recursive = 1;
|
|
continue;
|
|
}
|
|
if (!strcmp(arg, "-t")) {
|
|
recursive = show_tree_entry_in_recursive = 1;
|
|
continue;
|
|
}
|
|
if (!strcmp(arg, "-R")) {
|
|
diff_setup_opt |= DIFF_SETUP_REVERSE;
|
|
continue;
|
|
}
|
|
if (!strcmp(arg, "-p")) {
|
|
diff_output_format = DIFF_FORMAT_PATCH;
|
|
recursive = 1;
|
|
continue;
|
|
}
|
|
if (!strncmp(arg, "-S", 2)) {
|
|
pickaxe = arg + 2;
|
|
continue;
|
|
}
|
|
if (!strncmp(arg, "-O", 2)) {
|
|
orderfile = arg + 2;
|
|
continue;
|
|
}
|
|
if (!strcmp(arg, "--pickaxe-all")) {
|
|
pickaxe_opts = DIFF_PICKAXE_ALL;
|
|
continue;
|
|
}
|
|
if (!strncmp(arg, "-M", 2)) {
|
|
detect_rename = DIFF_DETECT_RENAME;
|
|
if ((diff_score_opt = diff_scoreopt_parse(arg)) == -1)
|
|
usage(diff_tree_usage);
|
|
continue;
|
|
}
|
|
if (!strncmp(arg, "-C", 2)) {
|
|
detect_rename = DIFF_DETECT_COPY;
|
|
if ((diff_score_opt = diff_scoreopt_parse(arg)) == -1)
|
|
usage(diff_tree_usage);
|
|
continue;
|
|
}
|
|
if (!strncmp(arg, "-B", 2)) {
|
|
if ((diff_break_opt = diff_scoreopt_parse(arg)) == -1)
|
|
usage(diff_tree_usage);
|
|
continue;
|
|
}
|
|
if (!strcmp(arg, "-z")) {
|
|
diff_output_format = DIFF_FORMAT_MACHINE;
|
|
continue;
|
|
}
|
|
if (!strcmp(arg, "-m")) {
|
|
ignore_merges = 0;
|
|
continue;
|
|
}
|
|
if (!strcmp(arg, "-s")) {
|
|
diff_output_format = DIFF_FORMAT_NO_OUTPUT;
|
|
continue;
|
|
}
|
|
if (!strcmp(arg, "-v")) {
|
|
verbose_header = 1;
|
|
header_prefix = "diff-tree ";
|
|
continue;
|
|
}
|
|
if (!strcmp(arg, "--stdin")) {
|
|
read_stdin = 1;
|
|
continue;
|
|
}
|
|
if (!strcmp(arg, "--root")) {
|
|
show_root_diff = 1;
|
|
continue;
|
|
}
|
|
usage(diff_tree_usage);
|
|
}
|
|
|
|
if (argc > 0) {
|
|
int i;
|
|
|
|
paths = argv;
|
|
nr_paths = argc;
|
|
pathlens = xmalloc(nr_paths * sizeof(int));
|
|
for (i=0; i<nr_paths; i++)
|
|
pathlens[i] = strlen(paths[i]);
|
|
}
|
|
|
|
switch (nr_sha1) {
|
|
case 0:
|
|
if (!read_stdin)
|
|
usage(diff_tree_usage);
|
|
break;
|
|
case 1:
|
|
diff_tree_commit(sha1[0], NULL);
|
|
break;
|
|
case 2:
|
|
diff_tree_sha1_top(sha1[0], sha1[1], "");
|
|
break;
|
|
}
|
|
|
|
if (!read_stdin)
|
|
return 0;
|
|
|
|
if (detect_rename)
|
|
diff_setup_opt |= (DIFF_SETUP_USE_SIZE_CACHE |
|
|
DIFF_SETUP_USE_CACHE);
|
|
while (fgets(line, sizeof(line), stdin))
|
|
diff_tree_stdin(line);
|
|
|
|
return 0;
|
|
}
|