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
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
|
#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[] = {
"git show-ref [-q|--quiet] [--verify] [--head] [-d|--dereference] [-s|--hash[=<n>]] [--abbrev[=<n>]] [--tags] [--heads] [--] [pattern*] ",
"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)
{
struct object *obj;
const char *hex;
unsigned char peeled[20];
if (tags_only || heads_only) {
int match;
match = heads_only && !prefixcmp(refname, "refs/heads/");
match |= tags_only && !prefixcmp(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 ((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 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_NODUP;
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_BOOLEAN(0, "tags", &tags_only, "only show tags (can be combined with heads)"),
OPT_BOOLEAN(0, "heads", &heads_only, "only show heads (can be combined with tags)"),
OPT_BOOLEAN(0, "verify", &verify, "stricter reference checking, "
"requires exact ref path"),
{ OPTION_BOOLEAN, 'h', NULL, &show_head, NULL,
"show the HEAD reference",
PARSE_OPT_NOARG | PARSE_OPT_HIDDEN },
OPT_BOOLEAN(0, "head", &show_head, "show the HEAD reference"),
OPT_BOOLEAN('d', "dereference", &deref_tags,
"dereference tags into object IDs"),
{ OPTION_CALLBACK, 's', "hash", &abbrev, "n",
"only show SHA1 hash using <n> digits",
PARSE_OPT_OPTARG, &hash_callback },
OPT__ABBREV(&abbrev),
OPT__QUIET(&quiet,
"do not print results to stdout (useful with --verify)"),
{ OPTION_CALLBACK, 0, "exclude-existing", &exclude_existing_arg,
"pattern", "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, "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 (!prefixcmp(*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;
}
|
