| /* |
| * rev-parse.c |
| * |
| * Copyright (C) Linus Torvalds, 2005 |
| */ |
| #include "cache.h" |
| #include "commit.h" |
| #include "refs.h" |
| #include "quote.h" |
| #include "builtin.h" |
| #include "parse-options.h" |
| |
| #define DO_REVS 1 |
| #define DO_NOREV 2 |
| #define DO_FLAGS 4 |
| #define DO_NONFLAGS 8 |
| static int filter = ~0; |
| |
| static const char *def; |
| |
| #define NORMAL 0 |
| #define REVERSED 1 |
| static int show_type = NORMAL; |
| |
| #define SHOW_SYMBOLIC_ASIS 1 |
| #define SHOW_SYMBOLIC_FULL 2 |
| static int symbolic; |
| static int abbrev; |
| static int abbrev_ref; |
| static int abbrev_ref_strict; |
| static int output_sq; |
| |
| /* |
| * Some arguments are relevant "revision" arguments, |
| * others are about output format or other details. |
| * This sorts it all out. |
| */ |
| static int is_rev_argument(const char *arg) |
| { |
| static const char *rev_args[] = { |
| "--all", |
| "--bisect", |
| "--dense", |
| "--branches", |
| "--header", |
| "--max-age=", |
| "--max-count=", |
| "--min-age=", |
| "--no-merges", |
| "--objects", |
| "--objects-edge", |
| "--parents", |
| "--pretty", |
| "--remotes", |
| "--sparse", |
| "--tags", |
| "--topo-order", |
| "--date-order", |
| "--unpacked", |
| NULL |
| }; |
| const char **p = rev_args; |
| |
| /* accept -<digit>, like traditional "head" */ |
| if ((*arg == '-') && isdigit(arg[1])) |
| return 1; |
| |
| for (;;) { |
| const char *str = *p++; |
| int len; |
| if (!str) |
| return 0; |
| len = strlen(str); |
| if (!strcmp(arg, str) || |
| (str[len-1] == '=' && !strncmp(arg, str, len))) |
| return 1; |
| } |
| } |
| |
| /* Output argument as a string, either SQ or normal */ |
| static void show(const char *arg) |
| { |
| if (output_sq) { |
| int sq = '\'', ch; |
| |
| putchar(sq); |
| while ((ch = *arg++)) { |
| if (ch == sq) |
| fputs("'\\'", stdout); |
| putchar(ch); |
| } |
| putchar(sq); |
| putchar(' '); |
| } |
| else |
| puts(arg); |
| } |
| |
| /* Like show(), but with a negation prefix according to type */ |
| static void show_with_type(int type, const char *arg) |
| { |
| if (type != show_type) |
| putchar('^'); |
| show(arg); |
| } |
| |
| /* Output a revision, only if filter allows it */ |
| static void show_rev(int type, const unsigned char *sha1, const char *name) |
| { |
| if (!(filter & DO_REVS)) |
| return; |
| def = NULL; |
| |
| if ((symbolic || abbrev_ref) && name) { |
| if (symbolic == SHOW_SYMBOLIC_FULL || abbrev_ref) { |
| unsigned char discard[20]; |
| char *full; |
| |
| switch (dwim_ref(name, strlen(name), discard, &full)) { |
| case 0: |
| /* |
| * Not found -- not a ref. We could |
| * emit "name" here, but symbolic-full |
| * users are interested in finding the |
| * refs spelled in full, and they would |
| * need to filter non-refs if we did so. |
| */ |
| break; |
| case 1: /* happy */ |
| if (abbrev_ref) |
| full = shorten_unambiguous_ref(full, |
| abbrev_ref_strict); |
| show_with_type(type, full); |
| break; |
| default: /* ambiguous */ |
| error("refname '%s' is ambiguous", name); |
| break; |
| } |
| } else { |
| show_with_type(type, name); |
| } |
| } |
| else if (abbrev) |
| show_with_type(type, find_unique_abbrev(sha1, abbrev)); |
| else |
| show_with_type(type, sha1_to_hex(sha1)); |
| } |
| |
| /* Output a flag, only if filter allows it. */ |
| static int show_flag(const char *arg) |
| { |
| if (!(filter & DO_FLAGS)) |
| return 0; |
| if (filter & (is_rev_argument(arg) ? DO_REVS : DO_NOREV)) { |
| show(arg); |
| return 1; |
| } |
| return 0; |
| } |
| |
| static int show_default(void) |
| { |
| const char *s = def; |
| |
| if (s) { |
| unsigned char sha1[20]; |
| |
| def = NULL; |
| if (!get_sha1(s, sha1)) { |
| show_rev(NORMAL, sha1, s); |
| return 1; |
| } |
| } |
| return 0; |
| } |
| |
| static int show_reference(const char *refname, const unsigned char *sha1, int flag, void *cb_data) |
| { |
| show_rev(NORMAL, sha1, refname); |
| return 0; |
| } |
| |
| static void show_datestring(const char *flag, const char *datestr) |
| { |
| static char buffer[100]; |
| |
| /* date handling requires both flags and revs */ |
| if ((filter & (DO_FLAGS | DO_REVS)) != (DO_FLAGS | DO_REVS)) |
| return; |
| snprintf(buffer, sizeof(buffer), "%s%lu", flag, approxidate(datestr)); |
| show(buffer); |
| } |
| |
| static int show_file(const char *arg) |
| { |
| show_default(); |
| if ((filter & (DO_NONFLAGS|DO_NOREV)) == (DO_NONFLAGS|DO_NOREV)) { |
| show(arg); |
| return 1; |
| } |
| return 0; |
| } |
| |
| static int try_difference(const char *arg) |
| { |
| char *dotdot; |
| unsigned char sha1[20]; |
| unsigned char end[20]; |
| const char *next; |
| const char *this; |
| int symmetric; |
| |
| if (!(dotdot = strstr(arg, ".."))) |
| return 0; |
| next = dotdot + 2; |
| this = arg; |
| symmetric = (*next == '.'); |
| |
| *dotdot = 0; |
| next += symmetric; |
| |
| if (!*next) |
| next = "HEAD"; |
| if (dotdot == arg) |
| this = "HEAD"; |
| if (!get_sha1(this, sha1) && !get_sha1(next, end)) { |
| show_rev(NORMAL, end, next); |
| show_rev(symmetric ? NORMAL : REVERSED, sha1, this); |
| if (symmetric) { |
| struct commit_list *exclude; |
| struct commit *a, *b; |
| a = lookup_commit_reference(sha1); |
| b = lookup_commit_reference(end); |
| exclude = get_merge_bases(a, b, 1); |
| while (exclude) { |
| struct commit_list *n = exclude->next; |
| show_rev(REVERSED, |
| exclude->item->object.sha1,NULL); |
| free(exclude); |
| exclude = n; |
| } |
| } |
| return 1; |
| } |
| *dotdot = '.'; |
| return 0; |
| } |
| |
| static int try_parent_shorthands(const char *arg) |
| { |
| char *dotdot; |
| unsigned char sha1[20]; |
| struct commit *commit; |
| struct commit_list *parents; |
| int parents_only; |
| |
| if ((dotdot = strstr(arg, "^!"))) |
| parents_only = 0; |
| else if ((dotdot = strstr(arg, "^@"))) |
| parents_only = 1; |
| |
| if (!dotdot || dotdot[2]) |
| return 0; |
| |
| *dotdot = 0; |
| if (get_sha1(arg, sha1)) |
| return 0; |
| |
| if (!parents_only) |
| show_rev(NORMAL, sha1, arg); |
| commit = lookup_commit_reference(sha1); |
| for (parents = commit->parents; parents; parents = parents->next) |
| show_rev(parents_only ? NORMAL : REVERSED, |
| parents->item->object.sha1, arg); |
| |
| return 1; |
| } |
| |
| static int parseopt_dump(const struct option *o, const char *arg, int unset) |
| { |
| struct strbuf *parsed = o->value; |
| if (unset) |
| strbuf_addf(parsed, " --no-%s", o->long_name); |
| else if (o->short_name) |
| strbuf_addf(parsed, " -%c", o->short_name); |
| else |
| strbuf_addf(parsed, " --%s", o->long_name); |
| if (arg) { |
| strbuf_addch(parsed, ' '); |
| sq_quote_buf(parsed, arg); |
| } |
| return 0; |
| } |
| |
| static const char *skipspaces(const char *s) |
| { |
| while (isspace(*s)) |
| s++; |
| return s; |
| } |
| |
| static int cmd_parseopt(int argc, const char **argv, const char *prefix) |
| { |
| static int keep_dashdash = 0, stop_at_non_option = 0; |
| static char const * const parseopt_usage[] = { |
| "git rev-parse --parseopt [options] -- [<args>...]", |
| NULL |
| }; |
| static struct option parseopt_opts[] = { |
| OPT_BOOLEAN(0, "keep-dashdash", &keep_dashdash, |
| "keep the `--` passed as an arg"), |
| OPT_BOOLEAN(0, "stop-at-non-option", &stop_at_non_option, |
| "stop parsing after the " |
| "first non-option argument"), |
| OPT_END(), |
| }; |
| |
| struct strbuf sb = STRBUF_INIT, parsed = STRBUF_INIT; |
| const char **usage = NULL; |
| struct option *opts = NULL; |
| int onb = 0, osz = 0, unb = 0, usz = 0; |
| |
| strbuf_addstr(&parsed, "set --"); |
| argc = parse_options(argc, argv, prefix, parseopt_opts, parseopt_usage, |
| PARSE_OPT_KEEP_DASHDASH); |
| if (argc < 1 || strcmp(argv[0], "--")) |
| usage_with_options(parseopt_usage, parseopt_opts); |
| |
| /* get the usage up to the first line with a -- on it */ |
| for (;;) { |
| if (strbuf_getline(&sb, stdin, '\n') == EOF) |
| die("premature end of input"); |
| ALLOC_GROW(usage, unb + 1, usz); |
| if (!strcmp("--", sb.buf)) { |
| if (unb < 1) |
| die("no usage string given before the `--' separator"); |
| usage[unb] = NULL; |
| break; |
| } |
| usage[unb++] = strbuf_detach(&sb, NULL); |
| } |
| |
| /* parse: (<short>|<short>,<long>|<long>)[=?]? SP+ <help> */ |
| while (strbuf_getline(&sb, stdin, '\n') != EOF) { |
| const char *s; |
| struct option *o; |
| |
| if (!sb.len) |
| continue; |
| |
| ALLOC_GROW(opts, onb + 1, osz); |
| memset(opts + onb, 0, sizeof(opts[onb])); |
| |
| o = &opts[onb++]; |
| s = strchr(sb.buf, ' '); |
| if (!s || *sb.buf == ' ') { |
| o->type = OPTION_GROUP; |
| o->help = xstrdup(skipspaces(sb.buf)); |
| continue; |
| } |
| |
| o->type = OPTION_CALLBACK; |
| o->help = xstrdup(skipspaces(s)); |
| o->value = &parsed; |
| o->flags = PARSE_OPT_NOARG; |
| o->callback = &parseopt_dump; |
| while (s > sb.buf && strchr("*=?!", s[-1])) { |
| switch (*--s) { |
| case '=': |
| o->flags &= ~PARSE_OPT_NOARG; |
| break; |
| case '?': |
| o->flags &= ~PARSE_OPT_NOARG; |
| o->flags |= PARSE_OPT_OPTARG; |
| break; |
| case '!': |
| o->flags |= PARSE_OPT_NONEG; |
| break; |
| case '*': |
| o->flags |= PARSE_OPT_HIDDEN; |
| break; |
| } |
| } |
| |
| if (s - sb.buf == 1) /* short option only */ |
| o->short_name = *sb.buf; |
| else if (sb.buf[1] != ',') /* long option only */ |
| o->long_name = xmemdupz(sb.buf, s - sb.buf); |
| else { |
| o->short_name = *sb.buf; |
| o->long_name = xmemdupz(sb.buf + 2, s - sb.buf - 2); |
| } |
| } |
| strbuf_release(&sb); |
| |
| /* put an OPT_END() */ |
| ALLOC_GROW(opts, onb + 1, osz); |
| memset(opts + onb, 0, sizeof(opts[onb])); |
| argc = parse_options(argc, argv, prefix, opts, usage, |
| keep_dashdash ? PARSE_OPT_KEEP_DASHDASH : 0 | |
| stop_at_non_option ? PARSE_OPT_STOP_AT_NON_OPTION : 0); |
| |
| strbuf_addf(&parsed, " --"); |
| sq_quote_argv(&parsed, argv, 0); |
| puts(parsed.buf); |
| return 0; |
| } |
| |
| static int cmd_sq_quote(int argc, const char **argv) |
| { |
| struct strbuf buf = STRBUF_INIT; |
| |
| if (argc) |
| sq_quote_argv(&buf, argv, 0); |
| printf("%s\n", buf.buf); |
| strbuf_release(&buf); |
| |
| return 0; |
| } |
| |
| static void die_no_single_rev(int quiet) |
| { |
| if (quiet) |
| exit(1); |
| else |
| die("Needed a single revision"); |
| } |
| |
| int cmd_rev_parse(int argc, const char **argv, const char *prefix) |
| { |
| int i, as_is = 0, verify = 0, quiet = 0, revs_count = 0, type = 0; |
| unsigned char sha1[20]; |
| const char *name = NULL; |
| |
| if (argc > 1 && !strcmp("--parseopt", argv[1])) |
| return cmd_parseopt(argc - 1, argv + 1, prefix); |
| |
| if (argc > 1 && !strcmp("--sq-quote", argv[1])) |
| return cmd_sq_quote(argc - 2, argv + 2); |
| |
| prefix = setup_git_directory(); |
| git_config(git_default_config, NULL); |
| for (i = 1; i < argc; i++) { |
| const char *arg = argv[i]; |
| |
| if (as_is) { |
| if (show_file(arg) && as_is < 2) |
| verify_filename(prefix, arg); |
| continue; |
| } |
| if (!strcmp(arg,"-n")) { |
| if (++i >= argc) |
| die("-n requires an argument"); |
| if ((filter & DO_FLAGS) && (filter & DO_REVS)) { |
| show(arg); |
| show(argv[i]); |
| } |
| continue; |
| } |
| if (!prefixcmp(arg, "-n")) { |
| if ((filter & DO_FLAGS) && (filter & DO_REVS)) |
| show(arg); |
| continue; |
| } |
| |
| if (*arg == '-') { |
| if (!strcmp(arg, "--")) { |
| as_is = 2; |
| /* Pass on the "--" if we show anything but files.. */ |
| if (filter & (DO_FLAGS | DO_REVS)) |
| show_file(arg); |
| continue; |
| } |
| if (!strcmp(arg, "--default")) { |
| def = argv[i+1]; |
| i++; |
| continue; |
| } |
| if (!strcmp(arg, "--revs-only")) { |
| filter &= ~DO_NOREV; |
| continue; |
| } |
| if (!strcmp(arg, "--no-revs")) { |
| filter &= ~DO_REVS; |
| continue; |
| } |
| if (!strcmp(arg, "--flags")) { |
| filter &= ~DO_NONFLAGS; |
| continue; |
| } |
| if (!strcmp(arg, "--no-flags")) { |
| filter &= ~DO_FLAGS; |
| continue; |
| } |
| if (!strcmp(arg, "--verify")) { |
| filter &= ~(DO_FLAGS|DO_NOREV); |
| verify = 1; |
| continue; |
| } |
| if (!strcmp(arg, "--quiet") || !strcmp(arg, "-q")) { |
| quiet = 1; |
| continue; |
| } |
| if (!strcmp(arg, "--short") || |
| !prefixcmp(arg, "--short=")) { |
| filter &= ~(DO_FLAGS|DO_NOREV); |
| verify = 1; |
| abbrev = DEFAULT_ABBREV; |
| if (arg[7] == '=') |
| abbrev = strtoul(arg + 8, NULL, 10); |
| if (abbrev < MINIMUM_ABBREV) |
| abbrev = MINIMUM_ABBREV; |
| else if (40 <= abbrev) |
| abbrev = 40; |
| continue; |
| } |
| if (!strcmp(arg, "--sq")) { |
| output_sq = 1; |
| continue; |
| } |
| if (!strcmp(arg, "--not")) { |
| show_type ^= REVERSED; |
| continue; |
| } |
| if (!strcmp(arg, "--symbolic")) { |
| symbolic = SHOW_SYMBOLIC_ASIS; |
| continue; |
| } |
| if (!strcmp(arg, "--symbolic-full-name")) { |
| symbolic = SHOW_SYMBOLIC_FULL; |
| continue; |
| } |
| if (!prefixcmp(arg, "--abbrev-ref") && |
| (!arg[12] || arg[12] == '=')) { |
| abbrev_ref = 1; |
| abbrev_ref_strict = warn_ambiguous_refs; |
| if (arg[12] == '=') { |
| if (!strcmp(arg + 13, "strict")) |
| abbrev_ref_strict = 1; |
| else if (!strcmp(arg + 13, "loose")) |
| abbrev_ref_strict = 0; |
| else |
| die("unknown mode for %s", arg); |
| } |
| continue; |
| } |
| if (!strcmp(arg, "--all")) { |
| for_each_ref(show_reference, NULL); |
| continue; |
| } |
| if (!strcmp(arg, "--branches")) { |
| for_each_branch_ref(show_reference, NULL); |
| continue; |
| } |
| if (!strcmp(arg, "--tags")) { |
| for_each_tag_ref(show_reference, NULL); |
| continue; |
| } |
| if (!strcmp(arg, "--remotes")) { |
| for_each_remote_ref(show_reference, NULL); |
| continue; |
| } |
| if (!strcmp(arg, "--show-prefix")) { |
| if (prefix) |
| puts(prefix); |
| continue; |
| } |
| if (!strcmp(arg, "--show-cdup")) { |
| const char *pfx = prefix; |
| if (!is_inside_work_tree()) { |
| const char *work_tree = |
| get_git_work_tree(); |
| if (work_tree) |
| printf("%s\n", work_tree); |
| continue; |
| } |
| while (pfx) { |
| pfx = strchr(pfx, '/'); |
| if (pfx) { |
| pfx++; |
| printf("../"); |
| } |
| } |
| putchar('\n'); |
| continue; |
| } |
| if (!strcmp(arg, "--git-dir")) { |
| const char *gitdir = getenv(GIT_DIR_ENVIRONMENT); |
| static char cwd[PATH_MAX]; |
| if (gitdir) { |
| puts(gitdir); |
| continue; |
| } |
| if (!prefix) { |
| puts(".git"); |
| continue; |
| } |
| if (!getcwd(cwd, PATH_MAX)) |
| die_errno("unable to get current working directory"); |
| printf("%s/.git\n", cwd); |
| continue; |
| } |
| if (!strcmp(arg, "--is-inside-git-dir")) { |
| printf("%s\n", is_inside_git_dir() ? "true" |
| : "false"); |
| continue; |
| } |
| if (!strcmp(arg, "--is-inside-work-tree")) { |
| printf("%s\n", is_inside_work_tree() ? "true" |
| : "false"); |
| continue; |
| } |
| if (!strcmp(arg, "--is-bare-repository")) { |
| printf("%s\n", is_bare_repository() ? "true" |
| : "false"); |
| continue; |
| } |
| if (!prefixcmp(arg, "--since=")) { |
| show_datestring("--max-age=", arg+8); |
| continue; |
| } |
| if (!prefixcmp(arg, "--after=")) { |
| show_datestring("--max-age=", arg+8); |
| continue; |
| } |
| if (!prefixcmp(arg, "--before=")) { |
| show_datestring("--min-age=", arg+9); |
| continue; |
| } |
| if (!prefixcmp(arg, "--until=")) { |
| show_datestring("--min-age=", arg+8); |
| continue; |
| } |
| if (show_flag(arg) && verify) |
| die_no_single_rev(quiet); |
| continue; |
| } |
| |
| /* Not a flag argument */ |
| if (try_difference(arg)) |
| continue; |
| if (try_parent_shorthands(arg)) |
| continue; |
| name = arg; |
| type = NORMAL; |
| if (*arg == '^') { |
| name++; |
| type = REVERSED; |
| } |
| if (!get_sha1(name, sha1)) { |
| if (verify) |
| revs_count++; |
| else |
| show_rev(type, sha1, name); |
| continue; |
| } |
| if (verify) |
| die_no_single_rev(quiet); |
| as_is = 1; |
| if (!show_file(arg)) |
| continue; |
| verify_filename(prefix, arg); |
| } |
| if (verify) { |
| if (revs_count == 1) { |
| show_rev(type, sha1, name); |
| return 0; |
| } else if (revs_count == 0 && show_default()) |
| return 0; |
| die_no_single_rev(quiet); |
| } else |
| show_default(); |
| return 0; |
| } |