diff options
Diffstat (limited to 'builtin-show-ref.c')
| -rw-r--r-- | builtin-show-ref.c | 139 |
1 files changed, 121 insertions, 18 deletions
diff --git a/builtin-show-ref.c b/builtin-show-ref.c index 06ec400..853f13f 100644 --- a/builtin-show-ref.c +++ b/builtin-show-ref.c @@ -2,17 +2,28 @@ #include "refs.h" #include "object.h" #include "tag.h" +#include "path-list.h" -static const char show_ref_usage[] = "git show-ref [-q|--quiet] [--verify] [-h|--head] [-d|--dereference] [-s|--hash[=<length>]] [--abbrev[=<length>]] [--tags] [--heads] [--] [pattern*]"; +static const char show_ref_usage[] = "git show-ref [-q|--quiet] [--verify] [-h|--head] [-d|--dereference] [-s|--hash[=<length>]] [--abbrev[=<length>]] [--tags] [--heads] [--] [pattern*] < ref-list"; static int deref_tags = 0, show_head = 0, tags_only = 0, heads_only = 0, found_match = 0, verify = 0, quiet = 0, hash_only = 0, abbrev = 0; static const char **pattern; +static void show_one(const char *refname, const unsigned char *sha1) +{ + const char *hex = find_unique_abbrev(sha1, abbrev); + if (hash_only) + printf("%s\n", hex); + else + printf("%s %s\n", hex, refname); +} + static int show_ref(const char *refname, const unsigned char *sha1, int flag, void *cbdata) { struct object *obj; const char *hex; + unsigned char peeled[20]; if (tags_only || heads_only) { int match; @@ -44,24 +55,93 @@ static int show_ref(const char *refname, const unsigned char *sha1, int flag, vo match: found_match++; - obj = parse_object(sha1); - if (!obj) { - if (quiet) - return 0; - die("git-show-ref: bad ref %s (%s)", refname, sha1_to_hex(sha1)); - } + + /* This changes the semantics slightly that even under quiet we + * detect and return error if the repository is corrupt and + * ref points at a nonexistent object. + */ + if (!has_sha1_file(sha1)) + die("git-show-ref: bad ref %s (%s)", refname, + sha1_to_hex(sha1)); + if (quiet) return 0; - hex = find_unique_abbrev(sha1, abbrev); - if (hash_only) - printf("%s\n", hex); - else - printf("%s %s\n", hex, refname); - if (deref_tags && obj->type == OBJ_TAG) { - obj = deref_tag(obj, refname, 0); - hex = find_unique_abbrev(obj->sha1, abbrev); - printf("%s %s^{}\n", hex, refname); + show_one(refname, sha1); + + if (!deref_tags) + return 0; + + if ((flag & REF_ISPACKED) && !peel_ref(refname, peeled)) { + if (!is_null_sha1(peeled)) { + hex = find_unique_abbrev(peeled, abbrev); + printf("%s %s^{}\n", hex, refname); + } + } + else { + obj = parse_object(sha1); + if (!obj) + die("git-show-ref: bad ref %s (%s)", refname, + sha1_to_hex(sha1)); + if (obj->type == OBJ_TAG) { + obj = deref_tag(obj, refname, 0); + hex = find_unique_abbrev(obj->sha1, abbrev); + printf("%s %s^{}\n", hex, refname); + } + } + return 0; +} + +static int add_existing(const char *refname, const unsigned char *sha1, int flag, void *cbdata) +{ + struct path_list *list = (struct path_list *)cbdata; + path_list_insert(refname, list); + return 0; +} + +/* + * read "^(?:<anything>\s)?<refname>(?:\^\{\})?$" from the standard input, + * and + * (1) strip "^{}" at the end of line if any; + * (2) ignore if match is provided and does not head-match refname; + * (3) warn if refname is not a well-formed refname and skip; + * (4) ignore if refname is a ref that exists in the local repository; + * (5) otherwise output the line. + */ +static int exclude_existing(const char *match) +{ + static struct path_list existing_refs = { NULL, 0, 0, 0 }; + char buf[1024]; + int matchlen = match ? strlen(match) : 0; + + for_each_ref(add_existing, &existing_refs); + while (fgets(buf, sizeof(buf), stdin)) { + char *ref; + int len = strlen(buf); + + if (len > 0 && buf[len - 1] == '\n') + buf[--len] = '\0'; + if (3 <= len && !strcmp(buf + len - 3, "^{}")) { + len -= 3; + buf[len] = '\0'; + } + for (ref = buf + len; buf < ref; ref--) + if (isspace(ref[-1])) + break; + if (match) { + int reflen = buf + len - ref; + if (reflen < matchlen) + continue; + if (strncmp(ref, match, matchlen)) + continue; + } + if (check_ref_format(ref)) { + fprintf(stderr, "warning: ref '%s' ignored\n", ref); + continue; + } + if (!path_list_has_path(&existing_refs, ref)) { + printf("%s\n", buf); + } } return 0; } @@ -101,13 +181,13 @@ int cmd_show_ref(int argc, const char **argv, const char *prefix) if (!strncmp(arg, "--hash=", 7) || (!strncmp(arg, "--abbrev", 8) && (arg[8] == '=' || arg[8] == '\0'))) { - if (arg[3] != 'h' && !arg[8]) + if (arg[2] != 'h' && !arg[8]) /* --abbrev only */ abbrev = DEFAULT_ABBREV; else { /* --hash= or --abbrev= */ char *end; - if (arg[3] == 'h') { + if (arg[2] == 'h') { hash_only = 1; arg += 7; } @@ -133,8 +213,31 @@ int cmd_show_ref(int argc, const char **argv, const char *prefix) heads_only = 1; continue; } + if (!strcmp(arg, "--exclude-existing")) + return exclude_existing(NULL); + if (!strncmp(arg, "--exclude-existing=", 19)) + return exclude_existing(arg + 19); usage(show_ref_usage); } + + if (verify) { + unsigned char sha1[20]; + + while (*pattern) { + if (!strncmp(*pattern, "refs/", 5) && + resolve_ref(*pattern, sha1, 1, NULL)) { + if (!quiet) + show_one(*pattern, sha1); + } + else if (!quiet) + die("'%s' - not a valid ref", *pattern); + else + return 1; + pattern++; + } + return 0; + } + if (show_head) head_ref(show_ref, NULL); for_each_ref(show_ref, NULL); |