50ad8561de
"git $cmd -h" for builtin commands calls the implementation of the
command (i.e. cmd_$cmd() function) without doing any repository
set-up, and the commands that expect RUN_SETUP is done by the Git
potty needs to be prepared to show the help text without barfing.
* jk/consistent-h:
t0012: test "-h" with builtins
git: add hidden --list-builtins option
version: convert to parse-options
diff- and log- family: handle "git cmd -h" early
submodule--helper: show usage for "-h"
remote-{ext,fd}: print usage message on invalid arguments
upload-archive: handle "-h" option early
credential: handle invalid arguments earlier
61 lines
1.4 KiB
C
61 lines
1.4 KiB
C
#include "cache.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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int cached = 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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init_revisions(&rev, prefix);
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gitmodules_config();
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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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cached = 1;
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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 (!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, cached);
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return diff_result_code(&rev.diffopt, result);
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}
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