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/*
* GIT - The information manager from hell
*
* Copyright (C) Linus Torvalds, 2005
*/
#include "cache.h"
#include "diff.h"
static const char *show_diff_usage = "show-diff [-q] [-s] [-z] [paths...]";
static int matches_pathspec(struct cache_entry *ce, char **spec, int cnt)
{
int i;
int namelen = ce_namelen(ce);
for (i = 0; i < cnt; i++) {
int speclen = strlen(spec[i]);
if (! strncmp(spec[i], ce->name, speclen) &&
speclen <= namelen &&
(ce->name[speclen] == 0 ||
ce->name[speclen] == '/'))
return 1;
}
return 0;
}
int main(int argc, char **argv)
{
int silent = 0;
int silent_on_nonexisting_files = 0;
int machine_readable = 0;
int reverse = 0;
int entries = read_cache();
int i;
while (1 < argc && argv[1][0] == '-') {
if (!strcmp(argv[1], "-R"))
reverse = 1;
else if (!strcmp(argv[1], "-s"))
silent_on_nonexisting_files = silent = 1;
else if (!strcmp(argv[1], "-q"))
silent_on_nonexisting_files = 1;
else if (!strcmp(argv[1], "-z"))
machine_readable = 1;
else
usage(show_diff_usage);
argv++; argc--;
}
/* At this point, if argc == 1, then we are doing everything.
* Otherwise argv[1] .. argv[argc-1] have the explicit paths.
*/
if (entries < 0) {
perror("read_cache");
exit(1);
}
prepare_diff_cmd();
for (i = 0; i < entries; i++) {
struct stat st;
struct cache_entry *ce = active_cache[i];
int changed;
unsigned long size;
char type[20];
void *old;
if (1 < argc &&
! matches_pathspec(ce, argv+1, argc-1))
continue;
if (ce_stage(ce)) {
if (machine_readable)
printf("U %s%c", ce->name, 0);
else
printf("%s: Unmerged\n",
ce->name);
while (i < entries &&
!strcmp(ce->name, active_cache[i]->name))
i++;
i--; /* compensate for loop control increments */
continue;
}
if (stat(ce->name, &st) < 0) {
if (errno == ENOENT && silent_on_nonexisting_files)
continue;
if (machine_readable)
printf("X %s%c", ce->name, 0);
else {
printf("%s: %s\n", ce->name, strerror(errno));
if (errno == ENOENT)
show_diff_empty(ce->sha1, ce->name,
reverse);
}
continue;
}
changed = cache_match_stat(ce, &st);
if (!changed)
continue;
if (!machine_readable)
printf("%s: %s\n", ce->name, sha1_to_hex(ce->sha1));
else {
printf("%s %s%c", sha1_to_hex(ce->sha1), ce->name, 0);
continue;
}
if (silent)
continue;
old = read_sha1_file(ce->sha1, type, &size);
if (! old)
error("unable to read blob object for %s (%s)",
ce->name, sha1_to_hex(ce->sha1));
else
show_differences(ce->name, ce->name, old, size,
reverse);
free(old);
}
return 0;
}
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