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0f5a1d449b
There is currently no easy way to take the diff between the working tree or index and the merge base between an arbitrary commit and HEAD. Even diff's `...` notation doesn't allow this because it only works between commits. However, the ability to do this would be desirable to a user who would like to see all the changes they've made on a branch plus uncommitted changes without taking into account changes made in the upstream branch. Teach diff-index and diff (with one commit) the --merge-base option which allows a user to use the merge base of a commit and HEAD as the "before" side. Signed-off-by: Denton Liu <liu.denton@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
64 lines
1.6 KiB
C
64 lines
1.6 KiB
C
#define USE_THE_INDEX_COMPATIBILITY_MACROS
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#include "cache.h"
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#include "config.h"
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#include "diff.h"
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#include "commit.h"
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#include "revision.h"
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#include "builtin.h"
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#include "submodule.h"
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static const char diff_cache_usage[] =
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"git diff-index [-m] [--cached] "
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"[<common-diff-options>] <tree-ish> [<path>...]"
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COMMON_DIFF_OPTIONS_HELP;
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int cmd_diff_index(int argc, const char **argv, const char *prefix)
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{
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struct rev_info rev;
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unsigned int option = 0;
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int i;
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int result;
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if (argc == 2 && !strcmp(argv[1], "-h"))
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usage(diff_cache_usage);
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git_config(git_diff_basic_config, NULL); /* no "diff" UI options */
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repo_init_revisions(the_repository, &rev, prefix);
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rev.abbrev = 0;
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precompose_argv(argc, argv);
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argc = setup_revisions(argc, argv, &rev, NULL);
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for (i = 1; i < argc; i++) {
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const char *arg = argv[i];
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if (!strcmp(arg, "--cached"))
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option |= DIFF_INDEX_CACHED;
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else if (!strcmp(arg, "--merge-base"))
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option |= DIFF_INDEX_MERGE_BASE;
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else
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usage(diff_cache_usage);
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}
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if (!rev.diffopt.output_format)
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rev.diffopt.output_format = DIFF_FORMAT_RAW;
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/*
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* Make sure there is one revision (i.e. pending object),
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* and there is no revision filtering parameters.
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*/
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if (rev.pending.nr != 1 ||
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rev.max_count != -1 || rev.min_age != -1 || rev.max_age != -1)
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usage(diff_cache_usage);
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if (!(option & DIFF_INDEX_CACHED)) {
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setup_work_tree();
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if (read_cache_preload(&rev.diffopt.pathspec) < 0) {
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perror("read_cache_preload");
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return -1;
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}
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} else if (read_cache() < 0) {
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perror("read_cache");
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return -1;
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}
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result = run_diff_index(&rev, option);
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UNLEAK(rev);
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return diff_result_code(&rev.diffopt, result);
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}
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