root/builtin/diff-index.c

DEFINITIONS

1. cmd_diff_index

#include "cache.h"
#include "diff.h"
#include "commit.h"
#include "revision.h"
#include "builtin.h"
#include "submodule.h"

static const char diff_cache_usage[] =
"git diff-index [-m] [--cached] "
"[<common-diff-options>] <tree-ish> [<path>...]"
COMMON_DIFF_OPTIONS_HELP;

int cmd_diff_index(int argc, const char **argv, const char *prefix)
{
        struct rev_info rev;
        int cached = 0;
        int i;
        int result;

        init_revisions(&rev, prefix);
        gitmodules_config();
        git_config(git_diff_basic_config, NULL); /* no "diff" UI options */
        rev.abbrev = 0;

        argc = setup_revisions(argc, argv, &rev, NULL);
        for (i = 1; i < argc; i++) {
                const char *arg = argv[i];

                if (!strcmp(arg, "--cached"))
                        cached = 1;
                else
                        usage(diff_cache_usage);
        }
        if (!rev.diffopt.output_format)
                rev.diffopt.output_format = DIFF_FORMAT_RAW;

        /*
         * Make sure there is one revision (i.e. pending object),
         * and there is no revision filtering parameters.
         */
        if (rev.pending.nr != 1 ||
            rev.max_count != -1 || rev.min_age != -1 || rev.max_age != -1)
                usage(diff_cache_usage);
        if (!cached) {
                setup_work_tree();
                if (read_cache_preload(&rev.diffopt.pathspec) < 0) {
                        perror("read_cache_preload");
                        return -1;
                }
        } else if (read_cache() < 0) {
                perror("read_cache");
                return -1;
        }
        result = run_diff_index(&rev, cached);
        return diff_result_code(&rev.diffopt, result);
}