Bug Summary

File:builtin/show-ref.c
Location:line 183, column 2
Description:Value stored to 'argc' is never read

Annotated Source Code

1#include "builtin.h"
2#include "cache.h"
3#include "refs.h"
4#include "object.h"
5#include "tag.h"
6#include "string-list.h"
7#include "parse-options.h"
8
9static const char * const show_ref_usage[] = {
10 N_("git show-ref [-q | --quiet] [--verify] [--head] [-d | --dereference] [-s | --hash[=<n>]] [--abbrev[=<n>]] [--tags] [--heads] [--] [<pattern>...]")("git show-ref [-q | --quiet] [--verify] [--head] [-d | --dereference] [-s | --hash[=<n>]] [--abbrev[=<n>]] [--tags] [--heads] [--] [<pattern>...]"
),
11 N_("git show-ref --exclude-existing[=<pattern>]")("git show-ref --exclude-existing[=<pattern>]"),
12 NULL((void*)0)
13};
14
15static int deref_tags, show_head, tags_only, heads_only, found_match, verify,
16 quiet, hash_only, abbrev, exclude_arg;
17static const char **pattern;
18static const char *exclude_existing_arg;
19
20static void show_one(const char *refname, const struct object_id *oid)
21{
22 const char *hex;
23 struct object_id peeled;
24
25 if (!has_sha1_file(oid->hash))
26 die("git show-ref: bad ref %s (%s)", refname,
27 oid_to_hex(oid));
28
29 if (quiet)
30 return;
31
32 hex = find_unique_abbrev(oid->hash, abbrev);
33 if (hash_only)
34 printf("%s\n", hex);
35 else
36 printf("%s %s\n", hex, refname);
37
38 if (!deref_tags)
39 return;
40
41 if (!peel_ref(refname, peeled.hash)) {
42 hex = find_unique_abbrev(peeled.hash, abbrev);
43 printf("%s %s^{}\n", hex, refname);
44 }
45}
46
47static int show_ref(const char *refname, const struct object_id *oid,
48 int flag, void *cbdata)
49{
50 if (show_head && !strcmp(refname, "HEAD"))
51 goto match;
52
53 if (tags_only || heads_only) {
54 int match;
55
56 match = heads_only && starts_with(refname, "refs/heads/");
57 match |= tags_only && starts_with(refname, "refs/tags/");
58 if (!match)
59 return 0;
60 }
61 if (pattern) {
62 int reflen = strlen(refname);
63 const char **p = pattern, *m;
64 while ((m = *p++) != NULL((void*)0)) {
65 int len = strlen(m);
66 if (len > reflen)
67 continue;
68 if (memcmp(m, refname + reflen - len, len))
69 continue;
70 if (len == reflen)
71 goto match;
72 if (refname[reflen - len - 1] == '/')
73 goto match;
74 }
75 return 0;
76 }
77
78match:
79 found_match++;
80
81 show_one(refname, oid);
82
83 return 0;
84}
85
86static int add_existing(const char *refname, const struct object_id *oid,
87 int flag, void *cbdata)
88{
89 struct string_list *list = (struct string_list *)cbdata;
90 string_list_insert(list, refname);
91 return 0;
92}
93
94/*
95 * read "^(?:<anything>\s)?<refname>(?:\^\{\})?$" from the standard input,
96 * and
97 * (1) strip "^{}" at the end of line if any;
98 * (2) ignore if match is provided and does not head-match refname;
99 * (3) warn if refname is not a well-formed refname and skip;
100 * (4) ignore if refname is a ref that exists in the local repository;
101 * (5) otherwise output the line.
102 */
103static int exclude_existing(const char *match)
104{
105 static struct string_list existing_refs = STRING_LIST_INIT_DUP{ ((void*)0), 0, 0, 1, ((void*)0) };
106 char buf[1024];
107 int matchlen = match ? strlen(match) : 0;
108
109 for_each_ref(add_existing, &existing_refs);
110 while (fgets(buf, sizeof(buf), stdin__stdinp)) {
111 char *ref;
112 int len = strlen(buf);
113
114 if (len > 0 && buf[len - 1] == '\n')
115 buf[--len] = '\0';
116 if (3 <= len && !strcmp(buf + len - 3, "^{}")) {
117 len -= 3;
118 buf[len] = '\0';
119 }
120 for (ref = buf + len; buf < ref; ref--)
121 if (isspace(ref[-1])((sane_ctype[(unsigned char)(ref[-1])] & (0x01)) != 0))
122 break;
123 if (match) {
124 int reflen = buf + len - ref;
125 if (reflen < matchlen)
126 continue;
127 if (strncmp(ref, match, matchlen))
128 continue;
129 }
130 if (check_refname_format(ref, 0)) {
131 warning("ref '%s' ignored", ref);
132 continue;
133 }
134 if (!string_list_has_string(&existing_refs, ref)) {
135 printf("%s\n", buf);
136 }
137 }
138 return 0;
139}
140
141static int hash_callback(const struct option *opt, const char *arg, int unset)
142{
143 hash_only = 1;
144 /* Use full length SHA1 if no argument */
145 if (!arg)
146 return 0;
147 return parse_opt_abbrev_cb(opt, arg, unset);
148}
149
150static int exclude_existing_callback(const struct option *opt, const char *arg,
151 int unset)
152{
153 exclude_arg = 1;
154 *(const char **)opt->value = arg;
155 return 0;
156}
157
158static const struct option show_ref_options[] = {
159 OPT_BOOL(0, "tags", &tags_only, N_("only show tags (can be combined with heads)")){ OPTION_SET_INT, (0), ("tags"), (&tags_only), ((void*)0)
, (("only show tags (can be combined with heads)")), PARSE_OPT_NOARG
, ((void*)0), (1) },
160 OPT_BOOL(0, "heads", &heads_only, N_("only show heads (can be combined with tags)")){ OPTION_SET_INT, (0), ("heads"), (&heads_only), ((void*)
0), (("only show heads (can be combined with tags)")), PARSE_OPT_NOARG
, ((void*)0), (1) },
161 OPT_BOOL(0, "verify", &verify, N_("stricter reference checking, "{ OPTION_SET_INT, (0), ("verify"), (&verify), ((void*)0),
(("stricter reference checking, " "requires exact ref path")
), PARSE_OPT_NOARG, ((void*)0), (1) }
162 "requires exact ref path")){ OPTION_SET_INT, (0), ("verify"), (&verify), ((void*)0),
(("stricter reference checking, " "requires exact ref path")
), PARSE_OPT_NOARG, ((void*)0), (1) },
163 OPT_HIDDEN_BOOL('h', NULL, &show_head,{ OPTION_SET_INT, ('h'), (((void*)0)), (&show_head), ((void
*)0), (("show the HEAD reference, even if it would be filtered out"
)), PARSE_OPT_NOARG | PARSE_OPT_HIDDEN, ((void*)0), 1}
164 N_("show the HEAD reference, even if it would be filtered out")){ OPTION_SET_INT, ('h'), (((void*)0)), (&show_head), ((void
*)0), (("show the HEAD reference, even if it would be filtered out"
)), PARSE_OPT_NOARG | PARSE_OPT_HIDDEN, ((void*)0), 1},
165 OPT_BOOL(0, "head", &show_head,{ OPTION_SET_INT, (0), ("head"), (&show_head), ((void*)0)
, (("show the HEAD reference, even if it would be filtered out"
)), PARSE_OPT_NOARG, ((void*)0), (1) }
166 N_("show the HEAD reference, even if it would be filtered out")){ OPTION_SET_INT, (0), ("head"), (&show_head), ((void*)0)
, (("show the HEAD reference, even if it would be filtered out"
)), PARSE_OPT_NOARG, ((void*)0), (1) },
167 OPT_BOOL('d', "dereference", &deref_tags,{ OPTION_SET_INT, ('d'), ("dereference"), (&deref_tags), (
(void*)0), (("dereference tags into object IDs")), PARSE_OPT_NOARG
, ((void*)0), (1) }
168 N_("dereference tags into object IDs")){ OPTION_SET_INT, ('d'), ("dereference"), (&deref_tags), (
(void*)0), (("dereference tags into object IDs")), PARSE_OPT_NOARG
, ((void*)0), (1) },
169 { OPTION_CALLBACK, 's', "hash", &abbrev, N_("n")("n"),
170 N_("only show SHA1 hash using <n> digits")("only show SHA1 hash using <n> digits"),
171 PARSE_OPT_OPTARG, &hash_callback },
172 OPT__ABBREV(&abbrev){ OPTION_CALLBACK, 0, "abbrev", (&abbrev), ("n"), ("use <n> digits to display SHA-1s"
), PARSE_OPT_OPTARG, &parse_opt_abbrev_cb, 0 },
173 OPT__QUIET(&quiet,{ OPTION_COUNTUP, ('q'), ("quiet"), ((&quiet)), ((void*)0
), ((("do not print results to stdout (useful with --verify)"
))), PARSE_OPT_NOARG }
174 N_("do not print results to stdout (useful with --verify)")){ OPTION_COUNTUP, ('q'), ("quiet"), ((&quiet)), ((void*)0
), ((("do not print results to stdout (useful with --verify)"
))), PARSE_OPT_NOARG },
175 { OPTION_CALLBACK, 0, "exclude-existing", &exclude_existing_arg,
176 N_("pattern")("pattern"), N_("show refs from stdin that aren't in local repository")("show refs from stdin that aren't in local repository"),
177 PARSE_OPT_OPTARG | PARSE_OPT_NONEG, exclude_existing_callback },
178 OPT_END(){ OPTION_END }
179};
180
181int cmd_show_ref(int argc, const char **argv, const char *prefix)
182{
183 argc = parse_options(argc, argv, prefix, show_ref_options,
Value stored to 'argc' is never read
184 show_ref_usage, 0);
185
186 if (exclude_arg)
187 return exclude_existing(exclude_existing_arg);
188
189 pattern = argv;
190 if (!*pattern)
191 pattern = NULL((void*)0);
192
193 if (verify) {
194 if (!pattern)
195 die("--verify requires a reference");
196 while (*pattern) {
197 struct object_id oid;
198
199 if ((starts_with(*pattern, "refs/") || !strcmp(*pattern, "HEAD")) &&
200 !read_ref(*pattern, oid.hash)) {
201 show_one(*pattern, &oid);
202 }
203 else if (!quiet)
204 die("'%s' - not a valid ref", *pattern);
205 else
206 return 1;
207 pattern++;
208 }
209 return 0;
210 }
211
212 if (show_head)
213 head_ref(show_ref, NULL((void*)0));
214 for_each_ref(show_ref, NULL((void*)0));
215 if (!found_match) {
216 if (verify && !quiet)
217 die("No match");
218 return 1;
219 }
220 return 0;
221}