clean: respect pathspecs with "-d"
[git.git] / builtin / update-ref.c
blob702e90db2a82a0eba2ff233b9ec46690da5afc3e
1 #include "cache.h"
2 #include "refs.h"
3 #include "builtin.h"
4 #include "parse-options.h"
5 #include "quote.h"
6 #include "argv-array.h"
8 static const char * const git_update_ref_usage[] = {
9 N_("git update-ref [options] -d <refname> [<oldval>]"),
10 N_("git update-ref [options] <refname> <newval> [<oldval>]"),
11 N_("git update-ref [options] --stdin [-z]"),
12 NULL
15 static int updates_alloc;
16 static int updates_count;
17 static const struct ref_update **updates;
19 static char line_termination = '\n';
20 static int update_flags;
22 static struct ref_update *update_alloc(void)
24 struct ref_update *update;
26 /* Allocate and zero-init a struct ref_update */
27 update = xcalloc(1, sizeof(*update));
28 ALLOC_GROW(updates, updates_count + 1, updates_alloc);
29 updates[updates_count++] = update;
31 /* Store and reset accumulated options */
32 update->flags = update_flags;
33 update_flags = 0;
35 return update;
38 static void update_store_ref_name(struct ref_update *update,
39 const char *ref_name)
41 if (check_refname_format(ref_name, REFNAME_ALLOW_ONELEVEL))
42 die("invalid ref format: %s", ref_name);
43 update->ref_name = xstrdup(ref_name);
46 static void update_store_new_sha1(struct ref_update *update,
47 const char *newvalue)
49 if (*newvalue && get_sha1(newvalue, update->new_sha1))
50 die("invalid new value for ref %s: %s",
51 update->ref_name, newvalue);
54 static void update_store_old_sha1(struct ref_update *update,
55 const char *oldvalue)
57 if (*oldvalue && get_sha1(oldvalue, update->old_sha1))
58 die("invalid old value for ref %s: %s",
59 update->ref_name, oldvalue);
61 /* We have an old value if non-empty, or if empty without -z */
62 update->have_old = *oldvalue || line_termination;
65 static const char *parse_arg(const char *next, struct strbuf *arg)
67 /* Parse SP-terminated, possibly C-quoted argument */
68 if (*next != '"')
69 while (*next && !isspace(*next))
70 strbuf_addch(arg, *next++);
71 else if (unquote_c_style(arg, next, &next))
72 die("badly quoted argument: %s", next);
74 /* Return position after the argument */
75 return next;
78 static const char *parse_first_arg(const char *next, struct strbuf *arg)
80 /* Parse argument immediately after "command SP" */
81 strbuf_reset(arg);
82 if (line_termination) {
83 /* Without -z, use the next argument */
84 next = parse_arg(next, arg);
85 } else {
86 /* With -z, use rest of first NUL-terminated line */
87 strbuf_addstr(arg, next);
88 next = next + arg->len;
90 return next;
93 static const char *parse_next_arg(const char *next, struct strbuf *arg)
95 /* Parse next SP-terminated or NUL-terminated argument, if any */
96 strbuf_reset(arg);
97 if (line_termination) {
98 /* Without -z, consume SP and use next argument */
99 if (!*next)
100 return NULL;
101 if (*next != ' ')
102 die("expected SP but got: %s", next);
103 next = parse_arg(next + 1, arg);
104 } else {
105 /* With -z, read the next NUL-terminated line */
106 if (*next)
107 die("expected NUL but got: %s", next);
108 if (strbuf_getline(arg, stdin, '\0') == EOF)
109 return NULL;
110 next = arg->buf + arg->len;
112 return next;
115 static void parse_cmd_update(const char *next)
117 struct strbuf ref = STRBUF_INIT;
118 struct strbuf newvalue = STRBUF_INIT;
119 struct strbuf oldvalue = STRBUF_INIT;
120 struct ref_update *update;
122 update = update_alloc();
124 if ((next = parse_first_arg(next, &ref)) != NULL && ref.buf[0])
125 update_store_ref_name(update, ref.buf);
126 else
127 die("update line missing <ref>");
129 if ((next = parse_next_arg(next, &newvalue)) != NULL)
130 update_store_new_sha1(update, newvalue.buf);
131 else
132 die("update %s missing <newvalue>", ref.buf);
134 if ((next = parse_next_arg(next, &oldvalue)) != NULL)
135 update_store_old_sha1(update, oldvalue.buf);
136 else if(!line_termination)
137 die("update %s missing [<oldvalue>] NUL", ref.buf);
139 if (next && *next)
140 die("update %s has extra input: %s", ref.buf, next);
143 static void parse_cmd_create(const char *next)
145 struct strbuf ref = STRBUF_INIT;
146 struct strbuf newvalue = STRBUF_INIT;
147 struct ref_update *update;
149 update = update_alloc();
151 if ((next = parse_first_arg(next, &ref)) != NULL && ref.buf[0])
152 update_store_ref_name(update, ref.buf);
153 else
154 die("create line missing <ref>");
156 if ((next = parse_next_arg(next, &newvalue)) != NULL)
157 update_store_new_sha1(update, newvalue.buf);
158 else
159 die("create %s missing <newvalue>", ref.buf);
160 if (is_null_sha1(update->new_sha1))
161 die("create %s given zero new value", ref.buf);
163 if (next && *next)
164 die("create %s has extra input: %s", ref.buf, next);
167 static void parse_cmd_delete(const char *next)
169 struct strbuf ref = STRBUF_INIT;
170 struct strbuf oldvalue = STRBUF_INIT;
171 struct ref_update *update;
173 update = update_alloc();
175 if ((next = parse_first_arg(next, &ref)) != NULL && ref.buf[0])
176 update_store_ref_name(update, ref.buf);
177 else
178 die("delete line missing <ref>");
180 if ((next = parse_next_arg(next, &oldvalue)) != NULL)
181 update_store_old_sha1(update, oldvalue.buf);
182 else if(!line_termination)
183 die("delete %s missing [<oldvalue>] NUL", ref.buf);
184 if (update->have_old && is_null_sha1(update->old_sha1))
185 die("delete %s given zero old value", ref.buf);
187 if (next && *next)
188 die("delete %s has extra input: %s", ref.buf, next);
191 static void parse_cmd_verify(const char *next)
193 struct strbuf ref = STRBUF_INIT;
194 struct strbuf value = STRBUF_INIT;
195 struct ref_update *update;
197 update = update_alloc();
199 if ((next = parse_first_arg(next, &ref)) != NULL && ref.buf[0])
200 update_store_ref_name(update, ref.buf);
201 else
202 die("verify line missing <ref>");
204 if ((next = parse_next_arg(next, &value)) != NULL) {
205 update_store_old_sha1(update, value.buf);
206 update_store_new_sha1(update, value.buf);
207 } else if(!line_termination)
208 die("verify %s missing [<oldvalue>] NUL", ref.buf);
210 if (next && *next)
211 die("verify %s has extra input: %s", ref.buf, next);
214 static void parse_cmd_option(const char *next)
216 if (!strcmp(next, "no-deref"))
217 update_flags |= REF_NODEREF;
218 else
219 die("option unknown: %s", next);
222 static void update_refs_stdin(void)
224 struct strbuf cmd = STRBUF_INIT;
226 /* Read each line dispatch its command */
227 while (strbuf_getline(&cmd, stdin, line_termination) != EOF)
228 if (!cmd.buf[0])
229 die("empty command in input");
230 else if (isspace(*cmd.buf))
231 die("whitespace before command: %s", cmd.buf);
232 else if (!prefixcmp(cmd.buf, "update "))
233 parse_cmd_update(cmd.buf + 7);
234 else if (!prefixcmp(cmd.buf, "create "))
235 parse_cmd_create(cmd.buf + 7);
236 else if (!prefixcmp(cmd.buf, "delete "))
237 parse_cmd_delete(cmd.buf + 7);
238 else if (!prefixcmp(cmd.buf, "verify "))
239 parse_cmd_verify(cmd.buf + 7);
240 else if (!prefixcmp(cmd.buf, "option "))
241 parse_cmd_option(cmd.buf + 7);
242 else
243 die("unknown command: %s", cmd.buf);
245 strbuf_release(&cmd);
248 int cmd_update_ref(int argc, const char **argv, const char *prefix)
250 const char *refname, *oldval, *msg = NULL;
251 unsigned char sha1[20], oldsha1[20];
252 int delete = 0, no_deref = 0, read_stdin = 0, end_null = 0, flags = 0;
253 struct option options[] = {
254 OPT_STRING( 'm', NULL, &msg, N_("reason"), N_("reason of the update")),
255 OPT_BOOL('d', NULL, &delete, N_("delete the reference")),
256 OPT_BOOL( 0 , "no-deref", &no_deref,
257 N_("update <refname> not the one it points to")),
258 OPT_BOOL('z', NULL, &end_null, N_("stdin has NUL-terminated arguments")),
259 OPT_BOOL( 0 , "stdin", &read_stdin, N_("read updates from stdin")),
260 OPT_END(),
263 git_config(git_default_config, NULL);
264 argc = parse_options(argc, argv, prefix, options, git_update_ref_usage,
266 if (msg && !*msg)
267 die("Refusing to perform update with empty message.");
269 if (read_stdin) {
270 if (delete || no_deref || argc > 0)
271 usage_with_options(git_update_ref_usage, options);
272 if (end_null)
273 line_termination = '\0';
274 update_refs_stdin();
275 return update_refs(msg, updates, updates_count, DIE_ON_ERR);
278 if (end_null)
279 usage_with_options(git_update_ref_usage, options);
281 if (delete) {
282 if (argc < 1 || argc > 2)
283 usage_with_options(git_update_ref_usage, options);
284 refname = argv[0];
285 oldval = argv[1];
286 } else {
287 const char *value;
288 if (argc < 2 || argc > 3)
289 usage_with_options(git_update_ref_usage, options);
290 refname = argv[0];
291 value = argv[1];
292 oldval = argv[2];
293 if (get_sha1(value, sha1))
294 die("%s: not a valid SHA1", value);
297 hashclr(oldsha1); /* all-zero hash in case oldval is the empty string */
298 if (oldval && *oldval && get_sha1(oldval, oldsha1))
299 die("%s: not a valid old SHA1", oldval);
301 if (no_deref)
302 flags = REF_NODEREF;
303 if (delete)
304 return delete_ref(refname, oldval ? oldsha1 : NULL, flags);
305 else
306 return update_ref(msg, refname, sha1, oldval ? oldsha1 : NULL,
307 flags, DIE_ON_ERR);