+#include "builtin.h"
#include "cache.h"
#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;
- match = heads_only && !strncmp(refname, "refs/heads/", 11);
- match |= tags_only && !strncmp(refname, "refs/tags/", 10);
+ match = heads_only && !prefixcmp(refname, "refs/heads/");
+ match |= tags_only && !prefixcmp(refname, "refs/tags/");
if (!match)
return 0;
}
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);
+ if (!obj)
+ die("git-show-ref: bad tag at ref %s (%s)", refname,
+ sha1_to_hex(sha1));
+ 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;
}
hash_only = 1;
continue;
}
- if (!strncmp(arg, "--hash=", 7) ||
- (!strncmp(arg, "--abbrev", 8) &&
+ if (!prefixcmp(arg, "--hash=") ||
+ (!prefixcmp(arg, "--abbrev") &&
(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;
}
heads_only = 1;
continue;
}
+ if (!strcmp(arg, "--exclude-existing"))
+ return exclude_existing(NULL);
+ if (!prefixcmp(arg, "--exclude-existing="))
+ return exclude_existing(arg + 19);
usage(show_ref_usage);
}
+
+ if (verify) {
+ if (!pattern)
+ die("--verify requires a reference");
+ while (*pattern) {
+ unsigned char sha1[20];
+
+ if (!prefixcmp(*pattern, "refs/") &&
+ 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);