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fd0ffd3ad1
When git-local-pull with -l option gets ENOENT attempting to create a hard link, there is no point falling back to other copy methods. With this patch, git-local-pull detects such a case and gives up copying the file early. Signed-off-by: Junio C Hamano <junkio@cox.net>
135 lines
3.1 KiB
C
135 lines
3.1 KiB
C
/*
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* Copyright (C) 2005 Junio C Hamano
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*/
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#include <fcntl.h>
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#include <unistd.h>
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#include <string.h>
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#include <stdlib.h>
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#include "cache.h"
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#include "commit.h"
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#include <errno.h>
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#include <stdio.h>
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#include "pull.h"
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static int use_link = 0;
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static int use_symlink = 0;
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static int use_filecopy = 1;
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static int verbose = 0;
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static char *path;
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static void say(const char *fmt, const char *hex) {
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if (verbose)
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fprintf(stderr, fmt, hex);
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}
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int fetch(unsigned char *sha1)
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{
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static int object_name_start = -1;
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static char filename[PATH_MAX];
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char *hex = sha1_to_hex(sha1);
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const char *dest_filename = sha1_file_name(sha1);
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if (object_name_start < 0) {
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strcpy(filename, path); /* e.g. git.git */
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strcat(filename, "/objects/");
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object_name_start = strlen(filename);
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}
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filename[object_name_start+0] = hex[0];
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filename[object_name_start+1] = hex[1];
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filename[object_name_start+2] = '/';
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strcpy(filename + object_name_start + 3, hex + 2);
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if (use_link) {
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if (!link(filename, dest_filename)) {
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say("link %s\n", hex);
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return 0;
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}
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/* If we got ENOENT there is no point continuing. */
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if (errno == ENOENT) {
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fprintf(stderr, "does not exist %s\n", filename);
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return -1;
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}
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}
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if (use_symlink && !symlink(filename, dest_filename)) {
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say("symlink %s\n", hex);
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return 0;
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}
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if (use_filecopy) {
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int ifd, ofd, status;
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struct stat st;
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void *map;
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ifd = open(filename, O_RDONLY);
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if (ifd < 0 || fstat(ifd, &st) < 0) {
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close(ifd);
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fprintf(stderr, "cannot open %s\n", filename);
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return -1;
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}
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map = mmap(NULL, st.st_size, PROT_READ, MAP_PRIVATE, ifd, 0);
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close(ifd);
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if (-1 == (int)(long)map) {
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fprintf(stderr, "cannot mmap %s\n", filename);
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return -1;
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}
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ofd = open(dest_filename, O_WRONLY | O_CREAT | O_EXCL, 0666);
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status = ((ofd < 0) ||
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(write(ofd, map, st.st_size) != st.st_size));
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munmap(map, st.st_size);
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close(ofd);
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if (status)
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fprintf(stderr, "cannot write %s (%ld bytes)\n",
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dest_filename, st.st_size);
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else
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say("copy %s\n", hex);
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return status;
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}
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fprintf(stderr, "failed to copy %s with given copy methods.\n", hex);
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return -1;
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}
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static const char *local_pull_usage =
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"git-local-pull [-c] [-t] [-a] [-l] [-s] [-n] [-v] commit-id path";
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/*
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* By default we only use file copy.
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* If -l is specified, a hard link is attempted.
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* If -s is specified, then a symlink is attempted.
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* If -n is _not_ specified, then a regular file-to-file copy is done.
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*/
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int main(int argc, char **argv)
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{
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char *commit_id;
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int arg = 1;
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while (arg < argc && argv[arg][0] == '-') {
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if (argv[arg][1] == 't')
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get_tree = 1;
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else if (argv[arg][1] == 'c')
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get_history = 1;
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else if (argv[arg][1] == 'a') {
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get_all = 1;
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get_tree = 1;
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get_history = 1;
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}
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else if (argv[arg][1] == 'l')
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use_link = 1;
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else if (argv[arg][1] == 's')
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use_symlink = 1;
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else if (argv[arg][1] == 'n')
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use_filecopy = 0;
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else if (argv[arg][1] == 'v')
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verbose = 1;
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else
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usage(local_pull_usage);
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arg++;
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}
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if (argc < arg + 2)
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usage(local_pull_usage);
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commit_id = argv[arg];
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path = argv[arg + 1];
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if (pull(commit_id))
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return 1;
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return 0;
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}
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