diff options
Diffstat (limited to 'builtin/rev-parse.c')
| -rw-r--r-- | builtin/rev-parse.c | 733 |
1 files changed, 733 insertions, 0 deletions
diff --git a/builtin/rev-parse.c b/builtin/rev-parse.c new file mode 100644 index 000000000..8fbf9d0db --- /dev/null +++ b/builtin/rev-parse.c @@ -0,0 +1,733 @@ +/* + * 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=", + "--branches", + "--header", + "--max-age=", + "--max-count=", + "--min-age=", + "--no-merges", + "--objects", + "--objects-edge", + "--parents", + "--pretty", + "--remotes=", + "--remotes", + "--glob=", + "--sparse", + "--tags=", + "--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 int anti_reference(const char *refname, const unsigned char *sha1, int flag, void *cb_data) +{ + show_rev(REVERSED, 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"); +} + +static const char builtin_rev_parse_usage[] = +"git rev-parse --parseopt [options] -- [<args>...]\n" +" or: git rev-parse --sq-quote [<arg>...]\n" +" or: git rev-parse [options] [<arg>...]\n" +"\n" +"Run \"git rev-parse --parseopt -h\" for more information on the first usage."; + +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); + + if (argc == 2 && !strcmp("--local-env-vars", argv[1])) { + int i; + for (i = 0; local_repo_env[i]; i++) + printf("%s\n", local_repo_env[i]); + return 0; + } + + if (argc > 1 && !strcmp("-h", argv[1])) + usage(builtin_rev_parse_usage); + + 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, "--bisect")) { + for_each_ref_in("refs/bisect/bad", show_reference, NULL); + for_each_ref_in("refs/bisect/good", anti_reference, NULL); + continue; + } + if (!prefixcmp(arg, "--branches=")) { + for_each_glob_ref_in(show_reference, arg + 11, + "refs/heads/", NULL); + continue; + } + if (!strcmp(arg, "--branches")) { + for_each_branch_ref(show_reference, NULL); + continue; + } + if (!prefixcmp(arg, "--tags=")) { + for_each_glob_ref_in(show_reference, arg + 7, + "refs/tags/", NULL); + continue; + } + if (!strcmp(arg, "--tags")) { + for_each_tag_ref(show_reference, NULL); + continue; + } + if (!prefixcmp(arg, "--glob=")) { + for_each_glob_ref(show_reference, arg + 7, NULL); + continue; + } + if (!prefixcmp(arg, "--remotes=")) { + for_each_glob_ref_in(show_reference, arg + 10, + "refs/remotes/", NULL); + continue; + } + if (!strcmp(arg, "--remotes")) { + for_each_remote_ref(show_reference, NULL); + continue; + } + if (!strcmp(arg, "--show-toplevel")) { + const char *work_tree = get_git_work_tree(); + if (work_tree) + puts(work_tree); + 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]; + int len; + if (gitdir) { + puts(gitdir); + continue; + } + if (!prefix) { + puts(".git"); + continue; + } + if (!getcwd(cwd, PATH_MAX)) + die_errno("unable to get current working directory"); + len = strlen(cwd); + printf("%s%s.git\n", cwd, len && cwd[len-1] != '/' ? "/" : ""); + 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; +} |