/* * 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 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 && name) { if (symbolic == SHOW_SYMBOLIC_FULL) { 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 */ 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; 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_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, 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, opts, usage, keep_dashdash ? PARSE_OPT_KEEP_DASHDASH : 0); strbuf_addf(&parsed, " --"); sq_quote_argv(&parsed, argv, 0); puts(parsed.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); 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 (!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("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; }