2 * GIT - The information manager from hell
4 * Copyright (C) Linus Torvalds, 2005
8 static char *diff_cmd = "diff -L '%s' -u -N - '%s'";
10 /* Help to copy the thing properly quoted for the shell safety.
11 * any single quote is replaced with '\'', and the caller is
12 * expected to enclose the result within a single quote pair.
15 * original sq_expand result
16 * name ==> name ==> 'name'
17 * a b ==> a b ==> 'a b'
18 * a'b ==> a'\''b ==> 'a'\''b'
20 * NOTE! The returned memory belongs to this function so
23 static char *sq_expand(char *src)
25 static char *buf = NULL;
26 static int buf_size = -1;
30 /* count single quote characters */
31 for (cnt = 0, cp = src; *cp; cnt++, cp++)
42 while ((c = *src++)) {
46 cp = strcpy(cp, "'\\''");
54 static void show_differences(char *name, void *old_contents,
55 unsigned long long old_size)
58 static char *cmd = NULL;
59 static int cmd_size = -1;
61 char *name_sq = sq_expand(name);
62 int cmd_required_length = strlen(name_sq) * 2 + strlen(diff_cmd);
64 if (cmd_size < cmd_required_length) {
66 cmd_size = cmd_required_length;
67 cmd = malloc(cmd_required_length);
69 snprintf(cmd, cmd_size, diff_cmd, name_sq, name_sq);
72 fwrite(old_contents, old_size, 1, f);
76 static void show_diff_empty(struct cache_entry *ce)
79 unsigned long int size;
81 unsigned char type[20], *p, *end;
83 old = read_sha1_file(ce->sha1, type, &size);
88 printf("--- %s\n", ce->name);
89 printf("+++ /dev/null\n");
95 printf("@@ -1,%d +0,0 @@\n", lines);
113 static const char *show_diff_usage = "show-diff [-q] [-s] [-z] [paths...]";
115 static int matches_pathspec(struct cache_entry *ce, char **spec, int cnt)
118 int namelen = ce_namelen(ce);
119 for (i = 0; i < cnt; i++) {
120 int speclen = strlen(spec[i]);
121 if (! strncmp(spec[i], ce->name, speclen) &&
122 speclen <= namelen &&
123 (ce->name[speclen] == 0 ||
124 ce->name[speclen] == '/'))
130 int main(int argc, char **argv)
133 int silent_on_nonexisting_files = 0;
134 int machine_readable = 0;
135 int entries = read_cache();
138 while (1 < argc && argv[1][0] == '-') {
139 if (!strcmp(argv[1], "-s"))
140 silent_on_nonexisting_files = silent = 1;
141 else if (!strcmp(argv[1], "-q"))
142 silent_on_nonexisting_files = 1;
143 else if (!strcmp(argv[1], "-z"))
144 machine_readable = 1;
146 usage(show_diff_usage);
150 /* At this point, if argc == 1, then we are doing everything.
151 * Otherwise argv[1] .. argv[argc-1] have the explicit paths.
154 perror("read_cache");
157 for (i = 0; i < entries; i++) {
159 struct cache_entry *ce = active_cache[i];
166 ! matches_pathspec(ce, argv+1, argc-1))
170 if (machine_readable)
171 printf("U %s%c", ce->name, 0);
173 printf("%s: Unmerged\n",
175 while (i < entries &&
176 !strcmp(ce->name, active_cache[i]->name))
178 i--; /* compensate for loop control increments */
182 if (stat(ce->name, &st) < 0) {
183 if (errno == ENOENT && silent_on_nonexisting_files)
185 if (machine_readable)
186 printf("X %s%c", ce->name, 0);
188 printf("%s: %s\n", ce->name, strerror(errno));
194 changed = cache_match_stat(ce, &st);
197 if (!machine_readable)
198 printf("%s: %s\n", ce->name, sha1_to_hex(ce->sha1));
200 printf("%s %s%c", sha1_to_hex(ce->sha1), ce->name, 0);
207 old = read_sha1_file(ce->sha1, type, &size);
208 show_differences(ce->name, old, size);