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![Junio C Hamano](/assets/img/avatar_default.png)
The previous round forgot to make sure there actually are two versions to compare against the working tree version. Otherwise using -c/--cc would not make much sense. Also plug a small memory leak. Signed-off-by: Junio C Hamano <junkio@cox.net>
206 lines
4.8 KiB
C
206 lines
4.8 KiB
C
/*
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* GIT - The information manager from hell
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*
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* Copyright (C) Linus Torvalds, 2005
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*/
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#include "cache.h"
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#include "diff.h"
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static const char diff_files_usage[] =
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"git-diff-files [-q] [-0/-1/2/3 |-c|--cc] [<common diff options>] [<path>...]"
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COMMON_DIFF_OPTIONS_HELP;
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static struct diff_options diff_options;
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static int silent = 0;
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static int diff_unmerged_stage = 2;
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static int combine_merges = 0;
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static int dense_combined_merges = 0;
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static void show_unmerge(const char *path)
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{
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diff_unmerge(&diff_options, path);
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}
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static void show_file(int pfx, struct cache_entry *ce)
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{
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diff_addremove(&diff_options, pfx, ntohl(ce->ce_mode),
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ce->sha1, ce->name, NULL);
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}
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static void show_modified(int oldmode, int mode,
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const unsigned char *old_sha1, const unsigned char *sha1,
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char *path)
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{
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diff_change(&diff_options, oldmode, mode, old_sha1, sha1, path, NULL);
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}
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int main(int argc, const char **argv)
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{
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const char **pathspec;
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const char *prefix = setup_git_directory();
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int entries, i;
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git_config(git_diff_config);
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diff_setup(&diff_options);
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while (1 < argc && argv[1][0] == '-') {
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if (!strcmp(argv[1], "--")) {
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argv++;
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argc--;
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break;
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}
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if (!strcmp(argv[1], "-0"))
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diff_unmerged_stage = 0;
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else if (!strcmp(argv[1], "-1"))
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diff_unmerged_stage = 1;
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else if (!strcmp(argv[1], "-2"))
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diff_unmerged_stage = 2;
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else if (!strcmp(argv[1], "-3"))
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diff_unmerged_stage = 3;
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else if (!strcmp(argv[1], "--base"))
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diff_unmerged_stage = 1;
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else if (!strcmp(argv[1], "--ours"))
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diff_unmerged_stage = 2;
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else if (!strcmp(argv[1], "--theirs"))
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diff_unmerged_stage = 3;
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else if (!strcmp(argv[1], "-q"))
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silent = 1;
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else if (!strcmp(argv[1], "-r"))
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; /* no-op */
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else if (!strcmp(argv[1], "-s"))
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; /* no-op */
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else if (!strcmp(argv[1], "-c"))
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combine_merges = 1;
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else if (!strcmp(argv[1], "--cc"))
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dense_combined_merges = combine_merges = 1;
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else {
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int diff_opt_cnt;
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diff_opt_cnt = diff_opt_parse(&diff_options,
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argv+1, argc-1);
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if (diff_opt_cnt < 0)
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usage(diff_files_usage);
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else if (diff_opt_cnt) {
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argv += diff_opt_cnt;
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argc -= diff_opt_cnt;
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continue;
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}
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else
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usage(diff_files_usage);
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}
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argv++; argc--;
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}
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if (combine_merges) {
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diff_options.output_format = DIFF_FORMAT_PATCH;
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}
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/* Find the directory, and set up the pathspec */
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pathspec = get_pathspec(prefix, argv + 1);
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entries = read_cache();
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if (diff_setup_done(&diff_options) < 0)
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usage(diff_files_usage);
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/* At this point, if argc == 1, then we are doing everything.
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* Otherwise argv[1] .. argv[argc-1] have the explicit paths.
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*/
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if (entries < 0) {
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perror("read_cache");
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exit(1);
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}
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for (i = 0; i < entries; i++) {
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struct stat st;
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unsigned int oldmode, newmode;
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struct cache_entry *ce = active_cache[i];
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int changed;
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if (!ce_path_match(ce, pathspec))
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continue;
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if (ce_stage(ce)) {
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struct {
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struct combine_diff_path p;
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unsigned char fill[4][20];
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} combine;
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int num_compare_stages = 0;
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combine.p.next = NULL;
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combine.p.len = ce_namelen(ce);
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combine.p.path = xmalloc(combine.p.len + 1);
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memcpy(combine.p.path, ce->name, combine.p.len);
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combine.p.path[combine.p.len] = 0;
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memset(combine.p.sha1, 0, 100);
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while (i < entries) {
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struct cache_entry *nce = active_cache[i];
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int stage;
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if (strcmp(ce->name, nce->name))
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break;
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/* Stage #2 (ours) is the first parent,
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* stage #3 (theirs) is the second.
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*/
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stage = ce_stage(nce);
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if (2 <= stage) {
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num_compare_stages++;
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memcpy(combine.p.parent_sha1[stage-2],
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nce->sha1, 20);
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}
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/* diff against the proper unmerged stage */
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if (stage == diff_unmerged_stage)
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ce = nce;
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i++;
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}
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/*
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* Compensate for loop update
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*/
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i--;
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if (combine_merges && num_compare_stages == 2) {
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show_combined_diff(&combine.p, 2,
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dense_combined_merges,
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NULL, 0);
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free(combine.p.path);
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continue;
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}
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free(combine.p.path);
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/*
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* Show the diff for the 'ce' if we found the one
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* from the desired stage.
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*/
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show_unmerge(ce->name);
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if (ce_stage(ce) != diff_unmerged_stage)
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continue;
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}
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if (lstat(ce->name, &st) < 0) {
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if (errno != ENOENT && errno != ENOTDIR) {
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perror(ce->name);
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continue;
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}
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if (silent)
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continue;
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show_file('-', ce);
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continue;
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}
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changed = ce_match_stat(ce, &st);
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if (!changed && !diff_options.find_copies_harder)
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continue;
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oldmode = ntohl(ce->ce_mode);
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newmode = DIFF_FILE_CANON_MODE(st.st_mode);
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if (!trust_executable_bit &&
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S_ISREG(newmode) && S_ISREG(oldmode) &&
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((newmode ^ oldmode) == 0111))
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newmode = oldmode;
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show_modified(oldmode, newmode,
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ce->sha1, (changed ? null_sha1 : ce->sha1),
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ce->name);
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}
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diffcore_std(&diff_options);
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diff_flush(&diff_options);
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return 0;
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}
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