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Merge branch 'jc/diff'
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* jc/diff:
  Libified diff-index: backward compatibility fix.
  Libify diff-index.
  Libify diff-files.
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Junio C Hamano committed Apr 26, 2006
2 parents 71459c1 + 5c21ac0 commit e9b5b75
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Showing 9 changed files with 2,111 additions and 2,136 deletions.
2 changes: 1 addition & 1 deletion Makefile
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Original file line number Diff line number Diff line change
Expand Up @@ -199,7 +199,7 @@ LIB_H = \
tree-walk.h log-tree.h

DIFF_OBJS = \
diff-lib.o diffcore-break.o diffcore-order.o \
diff.o diff-lib.o diffcore-break.o diffcore-order.o \
diffcore-pickaxe.o diffcore-rename.o tree-diff.o combine-diff.o \
diffcore-delta.o log-tree.o

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212 changes: 26 additions & 186 deletions diff-files.c
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Original file line number Diff line number Diff line change
Expand Up @@ -12,203 +12,43 @@ static const char diff_files_usage[] =
"git-diff-files [-q] [-0/-1/2/3 |-c|--cc] [<common diff options>] [<path>...]"
COMMON_DIFF_OPTIONS_HELP;

static struct rev_info rev;
static int silent = 0;
static int diff_unmerged_stage = 2;
static int combine_merges = 0;
static int dense_combined_merges = 0;

static void show_unmerge(const char *path)
{
diff_unmerge(&rev.diffopt, path);
}

static void show_file(int pfx, struct cache_entry *ce)
{
diff_addremove(&rev.diffopt, 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(&rev.diffopt, oldmode, mode, old_sha1, sha1, path, NULL);
}

int main(int argc, const char **argv)
{
const char **pathspec;
const char *prefix = setup_git_directory();
int entries, i;
struct rev_info rev;
int silent = 0;

git_config(git_diff_config);
diff_setup(&rev.diffopt);
init_revisions(&rev);
rev.abbrev = 0;

argc = setup_revisions(argc, argv, &rev, NULL);
while (1 < argc && argv[1][0] == '-') {
if (!strcmp(argv[1], "--")) {
argv++;
argc--;
break;
}
if (!strcmp(argv[1], "-0"))
diff_unmerged_stage = 0;
else if (!strcmp(argv[1], "-1"))
diff_unmerged_stage = 1;
else if (!strcmp(argv[1], "-2"))
diff_unmerged_stage = 2;
else if (!strcmp(argv[1], "-3"))
diff_unmerged_stage = 3;
else if (!strcmp(argv[1], "--base"))
diff_unmerged_stage = 1;
if (!strcmp(argv[1], "--base"))
rev.max_count = 1;
else if (!strcmp(argv[1], "--ours"))
diff_unmerged_stage = 2;
rev.max_count = 2;
else if (!strcmp(argv[1], "--theirs"))
diff_unmerged_stage = 3;
rev.max_count = 3;
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], "-c"))
combine_merges = 1;
else if (!strcmp(argv[1], "--cc"))
dense_combined_merges = combine_merges = 1;
else {
int diff_opt_cnt;
diff_opt_cnt = diff_opt_parse(&rev.diffopt,
argv+1, argc-1);
if (diff_opt_cnt < 0)
usage(diff_files_usage);
else if (diff_opt_cnt) {
argv += diff_opt_cnt;
argc -= diff_opt_cnt;
continue;
}
else
usage(diff_files_usage);
}
else
usage(diff_files_usage);
argv++; argc--;
}
if (dense_combined_merges)
rev.diffopt.output_format = DIFF_FORMAT_PATCH;

/* Find the directory, and set up the pathspec */
pathspec = get_pathspec(prefix, argv + 1);
entries = read_cache();

if (diff_setup_done(&rev.diffopt) < 0)
/*
* Make sure there are NO revision (i.e. pending object) parameter,
* rev.max_count is reasonable (0 <= n <= 3),
* there is no other revision filtering parameters.
*/
if (rev.pending_objects ||
rev.min_age != -1 || rev.max_age != -1)
usage(diff_files_usage);

/* At this point, if argc == 1, then we are doing everything.
* Otherwise argv[1] .. argv[argc-1] have the explicit paths.
/*
* Backward compatibility wart - "diff-files -s" used to
* defeat the common diff option "-s" which asked for
* DIFF_FORMAT_NO_OUTPUT.
*/
if (entries < 0) {
perror("read_cache");
exit(1);
}

for (i = 0; i < entries; i++) {
struct stat st;
unsigned int oldmode, newmode;
struct cache_entry *ce = active_cache[i];
int changed;

if (!ce_path_match(ce, pathspec))
continue;

if (ce_stage(ce)) {
struct {
struct combine_diff_path p;
struct combine_diff_parent filler[5];
} combine;
int num_compare_stages = 0;

combine.p.next = NULL;
combine.p.len = ce_namelen(ce);
combine.p.path = xmalloc(combine.p.len + 1);
memcpy(combine.p.path, ce->name, combine.p.len);
combine.p.path[combine.p.len] = 0;
combine.p.mode = 0;
memset(combine.p.sha1, 0, 20);
memset(&combine.p.parent[0], 0,
sizeof(combine.filler));

while (i < entries) {
struct cache_entry *nce = active_cache[i];
int stage;

if (strcmp(ce->name, nce->name))
break;

/* Stage #2 (ours) is the first parent,
* stage #3 (theirs) is the second.
*/
stage = ce_stage(nce);
if (2 <= stage) {
int mode = ntohl(nce->ce_mode);
num_compare_stages++;
memcpy(combine.p.parent[stage-2].sha1,
nce->sha1, 20);
combine.p.parent[stage-2].mode =
canon_mode(mode);
combine.p.parent[stage-2].status =
DIFF_STATUS_MODIFIED;
}

/* diff against the proper unmerged stage */
if (stage == diff_unmerged_stage)
ce = nce;
i++;
}
/*
* Compensate for loop update
*/
i--;

if (combine_merges && num_compare_stages == 2) {
show_combined_diff(&combine.p, 2,
dense_combined_merges,
&rev);
free(combine.p.path);
continue;
}
free(combine.p.path);

/*
* Show the diff for the 'ce' if we found the one
* from the desired stage.
*/
show_unmerge(ce->name);
if (ce_stage(ce) != diff_unmerged_stage)
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, 0);
if (!changed && !rev.diffopt.find_copies_harder)
continue;
oldmode = ntohl(ce->ce_mode);

newmode = canon_mode(st.st_mode);
if (!trust_executable_bit &&
S_ISREG(newmode) && S_ISREG(oldmode) &&
((newmode ^ oldmode) == 0111))
newmode = oldmode;
show_modified(oldmode, newmode,
ce->sha1, (changed ? null_sha1 : ce->sha1),
ce->name);
}
diffcore_std(&rev.diffopt);
diff_flush(&rev.diffopt);
return 0;
if (rev.diffopt.output_format == DIFF_FORMAT_NO_OUTPUT)
rev.diffopt.output_format = DIFF_FORMAT_RAW;
return run_diff_files(&rev, silent);
}
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