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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 =
"git-diff-files [-p] [-q] [-r] [-z] [-M] [-C] [-R] [-S<string>] [paths...]";
static int diff_output_format = DIFF_FORMAT_HUMAN;
static int detect_rename = 0;
static int reverse_diff = 0;
static int diff_score_opt = 0;
static const char *pickaxe = NULL;
static int silent = 0;
static void show_unmerge(const char *path)
{
diff_unmerge(path);
}
static void show_file(int pfx, struct cache_entry *ce)
{
diff_addremove(pfx, ntohl(ce->ce_mode), ce->sha1, ce->name, NULL);
}
static void show_modified(int oldmode, int mode,
const unsigned char *old_sha1, const unsigned char *sha1,
char *path)
{
diff_change(oldmode, mode, old_sha1, sha1, path, NULL);
}
int main(int argc, const 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"))
diff_output_format = DIFF_FORMAT_PATCH;
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"))
diff_output_format = DIFF_FORMAT_MACHINE;
else if (!strcmp(argv[1], "-R"))
reverse_diff = 1;
else if (!strcmp(argv[1], "-S"))
pickaxe = argv[1] + 2;
else if (!strncmp(argv[1], "-M", 2)) {
diff_score_opt = diff_scoreopt_parse(argv[1]);
detect_rename = DIFF_DETECT_RENAME;
}
else if (!strncmp(argv[1], "-C", 2)) {
diff_score_opt = diff_scoreopt_parse(argv[1]);
detect_rename = DIFF_DETECT_COPY;
}
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);
}
diff_setup(reverse_diff);
for (i = 0; i < entries; i++) {
struct stat st;
unsigned int oldmode, mode;
struct cache_entry *ce = active_cache[i];
int changed;
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 && errno != ENOTDIR) {
perror(ce->name);
continue;
}
if (silent)
continue;
show_file('-', ce);
continue;
}
changed = ce_match_stat(ce, &st);
if (!changed && detect_rename < DIFF_DETECT_COPY)
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);
}
if (detect_rename)
diffcore_rename(detect_rename, diff_score_opt);
diffcore_prune();
if (pickaxe)
diffcore_pickaxe(pickaxe);
if (1 < argc)
diffcore_pathspec(argv + 1);
diff_flush(diff_output_format);
return 0;
}
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