Revision 55672a39b4e0f82e6f997879724ea37ca7e0d765 authored by Junio C Hamano on 09 May 2016, 18:36:09 UTC, committed by Junio C Hamano on 09 May 2016, 19:32:42 UTC
We never used the "letters" form since we came up with "test_seq" to replace use of non-portable "seq" in our test script, which we introduced it at d17cf5f3 (tests: Introduce test_seq, 2012-08-04). We use this helper to either iterate for N times (i.e. the values on the lines do not even matter), or just to get N distinct strings (i.e. the values on the lines themselves do not really matter, but we care that they are different from each other and reproducible). Stop promising that we may allow using "letters"; this would open an easier reimplementation that does not rely on $PERL, if somebody later wants to. Signed-off-by: Junio C Hamano <gitster@pobox.com>
1 parent 7654286
show-ref.c
#include "builtin.h"
#include "cache.h"
#include "refs.h"
#include "object.h"
#include "tag.h"
#include "string-list.h"
#include "parse-options.h"
static const char * const show_ref_usage[] = {
N_("git show-ref [-q | --quiet] [--verify] [--head] [-d | --dereference] [-s | --hash[=<n>]] [--abbrev[=<n>]] [--tags] [--heads] [--] [<pattern>...]"),
N_("git show-ref --exclude-existing[=pattern] < ref-list"),
NULL
};
static int deref_tags, show_head, tags_only, heads_only, found_match, verify,
quiet, hash_only, abbrev, exclude_arg;
static const char **pattern;
static const char *exclude_existing_arg;
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)
{
const char *hex;
unsigned char peeled[20];
if (show_head && !strcmp(refname, "HEAD"))
goto match;
if (tags_only || heads_only) {
int match;
match = heads_only && starts_with(refname, "refs/heads/");
match |= tags_only && starts_with(refname, "refs/tags/");
if (!match)
return 0;
}
if (pattern) {
int reflen = strlen(refname);
const char **p = pattern, *m;
while ((m = *p++) != NULL) {
int len = strlen(m);
if (len > reflen)
continue;
if (memcmp(m, refname + reflen - len, len))
continue;
if (len == reflen)
goto match;
/* "--verify" requires an exact match */
if (verify)
continue;
if (refname[reflen - len - 1] == '/')
goto match;
}
return 0;
}
match:
found_match++;
/* 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;
show_one(refname, sha1);
if (!deref_tags)
return 0;
if (!peel_ref(refname, peeled)) {
hex = find_unique_abbrev(peeled, 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 string_list *list = (struct string_list *)cbdata;
string_list_insert(list, refname);
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 string_list existing_refs = STRING_LIST_INIT_DUP;
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_refname_format(ref, 0)) {
warning("ref '%s' ignored", ref);
continue;
}
if (!string_list_has_string(&existing_refs, ref)) {
printf("%s\n", buf);
}
}
return 0;
}
static int hash_callback(const struct option *opt, const char *arg, int unset)
{
hash_only = 1;
/* Use full length SHA1 if no argument */
if (!arg)
return 0;
return parse_opt_abbrev_cb(opt, arg, unset);
}
static int exclude_existing_callback(const struct option *opt, const char *arg,
int unset)
{
exclude_arg = 1;
*(const char **)opt->value = arg;
return 0;
}
static int help_callback(const struct option *opt, const char *arg, int unset)
{
return -1;
}
static const struct option show_ref_options[] = {
OPT_BOOL(0, "tags", &tags_only, N_("only show tags (can be combined with heads)")),
OPT_BOOL(0, "heads", &heads_only, N_("only show heads (can be combined with tags)")),
OPT_BOOL(0, "verify", &verify, N_("stricter reference checking, "
"requires exact ref path")),
OPT_HIDDEN_BOOL('h', NULL, &show_head,
N_("show the HEAD reference, even if it would be filtered out")),
OPT_BOOL(0, "head", &show_head,
N_("show the HEAD reference, even if it would be filtered out")),
OPT_BOOL('d', "dereference", &deref_tags,
N_("dereference tags into object IDs")),
{ OPTION_CALLBACK, 's', "hash", &abbrev, N_("n"),
N_("only show SHA1 hash using <n> digits"),
PARSE_OPT_OPTARG, &hash_callback },
OPT__ABBREV(&abbrev),
OPT__QUIET(&quiet,
N_("do not print results to stdout (useful with --verify)")),
{ OPTION_CALLBACK, 0, "exclude-existing", &exclude_existing_arg,
N_("pattern"), N_("show refs from stdin that aren't in local repository"),
PARSE_OPT_OPTARG | PARSE_OPT_NONEG, exclude_existing_callback },
{ OPTION_CALLBACK, 0, "help-all", NULL, NULL, N_("show usage"),
PARSE_OPT_HIDDEN | PARSE_OPT_NOARG, help_callback },
OPT_END()
};
int cmd_show_ref(int argc, const char **argv, const char *prefix)
{
if (argc == 2 && !strcmp(argv[1], "-h"))
usage_with_options(show_ref_usage, show_ref_options);
argc = parse_options(argc, argv, prefix, show_ref_options,
show_ref_usage, PARSE_OPT_NO_INTERNAL_HELP);
if (exclude_arg)
return exclude_existing(exclude_existing_arg);
pattern = argv;
if (!*pattern)
pattern = NULL;
if (verify) {
if (!pattern)
die("--verify requires a reference");
while (*pattern) {
unsigned char sha1[20];
if (starts_with(*pattern, "refs/") &&
!read_ref(*pattern, sha1)) {
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);
if (!found_match) {
if (verify && !quiet)
die("No match");
return 1;
}
return 0;
}
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