2 * GIT - The information manager from hell
4 * Copyright (C) Linus Torvalds, 2005
9 static char *diff_cmd
= "diff -L '%s' -u -N - '%s'";
11 /* Help to copy the thing properly quoted for the shell safety.
12 * any single quote is replaced with '\'', and the caller is
13 * expected to enclose the result within a single quote pair.
16 * original sq_expand result
17 * name ==> name ==> 'name'
18 * a b ==> a b ==> 'a b'
19 * a'b ==> a'\''b ==> 'a'\''b'
21 * NOTE! The returned memory belongs to this function so
24 static char *sq_expand(char *src
)
26 static char *buf
= NULL
;
27 static int buf_size
= -1;
31 /* count single quote characters */
32 for (cnt
= 0, cp
= src
; *cp
; cnt
++, cp
++)
43 while ((c
= *src
++)) {
47 cp
= strcpy(cp
, "'\\''");
55 static void show_differences(char *name
, void *old_contents
,
56 unsigned long long old_size
)
59 static char *cmd
= NULL
;
60 static int cmd_size
= -1;
62 char *name_sq
= sq_expand(name
);
63 int cmd_required_length
= strlen(name_sq
) * 2 + strlen(diff_cmd
);
65 if (cmd_size
< cmd_required_length
) {
67 cmd_size
= cmd_required_length
;
68 cmd
= malloc(cmd_required_length
);
70 snprintf(cmd
, cmd_size
, diff_cmd
, name_sq
, name_sq
);
73 fwrite(old_contents
, old_size
, 1, f
);
77 static void show_diff_empty(struct cache_entry
*ce
)
80 unsigned long int size
;
82 unsigned char type
[20], *p
, *end
;
84 old
= read_sha1_file(ce
->sha1
, type
, &size
);
89 printf("--- %s\n", ce
->name
);
90 printf("+++ /dev/null\n");
96 printf("@@ -1,%d +0,0 @@\n", lines
);
114 static const char *show_diff_usage
= "show-diff [-s] [-q] [-z] [paths...]";
116 static int matches_pathspec(struct cache_entry
*ce
, char **spec
, int cnt
)
119 int namelen
= ce_namelen(ce
);
120 for (i
= 0; i
< cnt
; i
++) {
121 int speclen
= strlen(spec
[i
]);
122 if (! strncmp(spec
[i
], ce
->name
, speclen
) &&
123 speclen
<= namelen
&&
124 (ce
->name
[speclen
] == 0 ||
125 ce
->name
[speclen
] == '/'))
131 int main(int argc
, char **argv
)
134 int silent_on_nonexisting_files
= 0;
135 int machine_readable
= 0;
136 int entries
= read_cache();
139 while (1 < argc
&& argv
[1][0] == '-') {
140 if (!strcmp(argv
[1], "-s"))
141 silent_on_nonexisting_files
= silent
= 1;
142 else if (!strcmp(argv
[1], "-q"))
143 silent_on_nonexisting_files
= 1;
144 else if (!strcmp(argv
[1], "-z")) {
145 machine_readable
= 1;
148 usage(show_diff_usage
);
152 /* At this point, if argc == 1, then we are doing everything.
153 * Otherwise argv[1] .. argv[argc-1] have the explicit paths.
156 perror("read_cache");
159 for (i
= 0; i
< entries
; i
++) {
161 struct cache_entry
*ce
= active_cache
[i
];
168 ! matches_pathspec(ce
, argv
+1, argc
-1))
171 if (stat(ce
->name
, &st
) < 0) {
172 if (errno
== ENOENT
&& silent_on_nonexisting_files
)
174 if (machine_readable
)
175 printf("X %s%c", ce
->name
, 0);
177 printf("%s: %s\n", ce
->name
, strerror(errno
));
183 changed
= cache_match_stat(ce
, &st
);
186 if (!machine_readable
)
187 printf("%s: %s\n", ce
->name
, sha1_to_hex(ce
->sha1
));
189 printf("%s %s%c", sha1_to_hex(ce
->sha1
), ce
->name
, 0);
196 old
= read_sha1_file(ce
->sha1
, type
, &size
);
197 show_differences(ce
->name
, old
, size
);