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/*
* GIT - The information manager from hell
*
* Copyright (C) Linus Torvalds, 2005
*/
#include "cache.h"
#include "diff.h"
static const char *diff_files_usage =
"diff-files [-p] [-q] [-r] [-z] [paths...]";
static int generate_patch = 0;
static int line_termination = '\n';
static int silent = 0;
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;
}
static void show_unmerge(const char *path)
{
if (generate_patch)
diff_unmerge(path);
else
printf("U %s%c", path, line_termination);
}
static void show_file(int pfx, struct cache_entry *ce)
{
if (generate_patch)
diff_addremove(pfx, ntohl(ce->ce_mode), ce->sha1,
ce->name, NULL);
else
printf("%c%06o\t%s\t%s\t%s%c",
pfx, ntohl(ce->ce_mode), "blob",
sha1_to_hex(ce->sha1), ce->name, line_termination);
}
static void show_modified(int oldmode, int mode,
const unsigned char *old_sha1, const unsigned char *sha1,
char *path)
{
char old_sha1_hex[41];
strcpy(old_sha1_hex, sha1_to_hex(old_sha1));
if (generate_patch)
diff_change(oldmode, mode, old_sha1, sha1, path, NULL);
else
printf("*%06o->%06o\tblob\t%s->%s\t%s%c",
oldmode, mode, old_sha1_hex, sha1_to_hex(sha1), path,
line_termination);
}
int main(int argc, char **argv)
{
static const unsigned char null_sha1[20] = { 0, };
int entries = read_cache();
int i;
while (1 < argc && argv[1][0] == '-') {
if (!strcmp(argv[1], "-p"))
generate_patch = 1;
else if (!strcmp(argv[1], "-q"))
silent = 1;
else if (!strcmp(argv[1], "-r"))
; /* no-op */
else if (!strcmp(argv[1], "-s"))
; /* no-op */
else if (!strcmp(argv[1], "-z"))
line_termination = 0;
else
usage(diff_files_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);
}
for (i = 0; i < entries; i++) {
struct stat st;
unsigned int oldmode, mode;
struct cache_entry *ce = active_cache[i];
int changed;
if (1 < argc &&
! matches_pathspec(ce, argv+1, argc-1))
continue;
if (ce_stage(ce)) {
show_unmerge(ce->name);
while (i < entries &&
!strcmp(ce->name, active_cache[i]->name))
i++;
i--; /* compensate for loop control increments */
continue;
}
if (lstat(ce->name, &st) < 0) {
if (errno != ENOENT) {
perror(ce->name);
continue;
}
if (silent)
continue;
show_file('-', ce);
continue;
}
changed = ce_match_stat(ce, &st);
if (!changed)
continue;
oldmode = ntohl(ce->ce_mode);
mode = (S_ISLNK(st.st_mode) ? S_IFLNK :
S_IFREG | ce_permissions(st.st_mode));
show_modified(oldmode, mode, ce->sha1, null_sha1,
ce->name);
}
return 0;
}
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