Merge branch 'jt/http-redact-cookies' into maint
[git.git] / builtin / diff-index.c
blob522f4fdffd064de2e50232934cb7d616246c92e4
1 #include "cache.h"
2 #include "config.h"
3 #include "diff.h"
4 #include "commit.h"
5 #include "revision.h"
6 #include "builtin.h"
7 #include "submodule.h"
9 static const char diff_cache_usage[] =
10 "git diff-index [-m] [--cached] "
11 "[<common-diff-options>] <tree-ish> [<path>...]"
12 COMMON_DIFF_OPTIONS_HELP;
14 int cmd_diff_index(int argc, const char **argv, const char *prefix)
16 struct rev_info rev;
17 int cached = 0;
18 int i;
19 int result;
21 if (argc == 2 && !strcmp(argv[1], "-h"))
22 usage(diff_cache_usage);
24 git_config(git_diff_basic_config, NULL); /* no "diff" UI options */
25 init_revisions(&rev, prefix);
26 rev.abbrev = 0;
27 precompose_argv(argc, argv);
29 argc = setup_revisions(argc, argv, &rev, NULL);
30 for (i = 1; i < argc; i++) {
31 const char *arg = argv[i];
33 if (!strcmp(arg, "--cached"))
34 cached = 1;
35 else
36 usage(diff_cache_usage);
38 if (!rev.diffopt.output_format)
39 rev.diffopt.output_format = DIFF_FORMAT_RAW;
42 * Make sure there is one revision (i.e. pending object),
43 * and there is no revision filtering parameters.
45 if (rev.pending.nr != 1 ||
46 rev.max_count != -1 || rev.min_age != -1 || rev.max_age != -1)
47 usage(diff_cache_usage);
48 if (!cached) {
49 setup_work_tree();
50 if (read_cache_preload(&rev.diffopt.pathspec) < 0) {
51 perror("read_cache_preload");
52 return -1;
54 } else if (read_cache() < 0) {
55 perror("read_cache");
56 return -1;
58 result = run_diff_index(&rev, cached);
59 UNLEAK(rev);
60 return diff_result_code(&rev.diffopt, result);