git@vger.kernel.org list mirror (unofficial, one of many)
 help / color / mirror / code / Atom feed
6a706c02a6f9782ee4abb289cfafe468253aca1f blob 5689 bytes (raw)

  1
  2
  3
  4
  5
  6
  7
  8
  9
 10
 11
 12
 13
 14
 15
 16
 17
 18
 19
 20
 21
 22
 23
 24
 25
 26
 27
 28
 29
 30
 31
 32
 33
 34
 35
 36
 37
 38
 39
 40
 41
 42
 43
 44
 45
 46
 47
 48
 49
 50
 51
 52
 53
 54
 55
 56
 57
 58
 59
 60
 61
 62
 63
 64
 65
 66
 67
 68
 69
 70
 71
 72
 73
 74
 75
 76
 77
 78
 79
 80
 81
 82
 83
 84
 85
 86
 87
 88
 89
 90
 91
 92
 93
 94
 95
 96
 97
 98
 99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
 
#include "builtin.h"
#include "cache.h"
#include "refs.h"
#include "object-store.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>]"),
	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 struct object_id *oid)
{
	const char *hex;
	struct object_id peeled;

	if (!has_object_file(oid))
		die("git show-ref: bad ref %s (%s)", refname,
		    oid_to_hex(oid));

	if (quiet)
		return;

	hex = find_unique_abbrev(oid, abbrev);
	if (hash_only)
		printf("%s\n", hex);
	else
		printf("%s %s\n", hex, refname);

	if (!deref_tags)
		return;

	if (!peel_ref(refname, &peeled)) {
		hex = find_unique_abbrev(&peeled, abbrev);
		printf("%s %s^{}\n", hex, refname);
	}
}

static int show_ref(const char *refname, const struct object_id *oid,
		    int flag, void *cbdata)
{
	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;
			if (refname[reflen - len - 1] == '/')
				goto match;
		}
		return 0;
	}

match:
	found_match++;

	show_one(refname, oid);

	return 0;
}

static int add_existing(const char *refname, const struct object_id *oid,
			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)
{
	BUG_ON_OPT_NEG(unset);
	exclude_arg = 1;
	*(const char **)opt->value = arg;
	return 0;
}

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 },
	OPT_END()
};

int cmd_show_ref(int argc, const char **argv, const char *prefix)
{
	argc = parse_options(argc, argv, prefix, show_ref_options,
			     show_ref_usage, 0);

	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) {
			struct object_id oid;

			if ((starts_with(*pattern, "refs/") || !strcmp(*pattern, "HEAD")) &&
			    !read_ref(*pattern, &oid)) {
				show_one(*pattern, &oid);
			}
			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;
}
debug log:

solving 6a706c02a6 ...
found 6a706c02a6 in git.git.git

Code repositories for project(s) associated with this inbox:

	https://80x24.org/mirrors/git.git

This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for read-only IMAP folder(s) and NNTP newsgroup(s).