/* * rev-parse.c * * Copyright (C) Linus Torvalds, 2005 */ #include "cache.h" #include "commit.h" #include "refs.h" #include "quote.h" #include "builtin.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; static int symbolic; static int abbrev; static int output_sq; static int revs_count; /* * 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 -, 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); } /* 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; revs_count++; if (type != show_type) putchar('^'); if (symbolic && name) show(name); else if (abbrev) show(find_unique_abbrev(sha1, abbrev)); else show(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 void 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; } } } 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; } int cmd_rev_parse(int argc, const char **argv, const char *prefix) { int i, as_is = 0, verify = 0; unsigned char sha1[20]; git_config(git_default_config); 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, "--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 = 1; 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; 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-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("Needed a single revision"); continue; } /* Not a flag argument */ if (try_difference(arg)) continue; if (!get_sha1(arg, sha1)) { show_rev(NORMAL, sha1, arg); continue; } if (*arg == '^' && !get_sha1(arg+1, sha1)) { show_rev(REVERSED, sha1, arg+1); continue; } as_is = 1; if (!show_file(arg)) continue; if (verify) die("Needed a single revision"); verify_filename(prefix, arg); } show_default(); if (verify && revs_count != 1) die("Needed a single revision"); return 0; }