4 #include "parse-options.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]"),
15 static int updates_alloc;
16 static int updates_count;
17 static 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;
38 static void update_store_ref_name(struct ref_update *update,
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,
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,
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;
66 * Parse one whitespace- or NUL-terminated, possibly C-quoted argument
67 * and append the result to arg. Return a pointer to the terminator.
68 * Die if there is an error in how the argument is C-quoted. This
69 * function is only used if not -z.
71 static const char *parse_arg(const char *next, struct strbuf *arg)
74 const char *orig = next;
76 if (unquote_c_style(arg, next, &next))
77 die("badly quoted argument: %s", orig);
78 if (*next && !isspace(*next))
79 die("unexpected character after quoted argument: %s", orig);
81 while (*next && !isspace(*next))
82 strbuf_addch(arg, *next++);
88 static const char *parse_first_arg(const char *next, struct strbuf *arg)
90 /* Parse argument immediately after "command SP" */
92 if (line_termination) {
93 /* Without -z, use the next argument */
94 next = parse_arg(next, arg);
96 /* With -z, use rest of first NUL-terminated line */
97 strbuf_addstr(arg, next);
98 next = next + arg->len;
103 static const char *parse_next_arg(const char *next, struct strbuf *arg)
105 /* Parse next SP-terminated or NUL-terminated argument, if any */
107 if (line_termination) {
108 /* Without -z, consume SP and use next argument */
112 die("expected SP but got: %s", next);
113 next = parse_arg(next + 1, arg);
115 /* With -z, read the next NUL-terminated line */
117 die("expected NUL but got: %s", next);
118 if (strbuf_getline(arg, stdin, '\0') == EOF)
120 next = arg->buf + arg->len;
125 static void parse_cmd_update(const char *next)
127 struct strbuf ref = STRBUF_INIT;
128 struct strbuf newvalue = STRBUF_INIT;
129 struct strbuf oldvalue = STRBUF_INIT;
130 struct ref_update *update;
132 update = update_alloc();
134 if ((next = parse_first_arg(next, &ref)) != NULL && ref.buf[0])
135 update_store_ref_name(update, ref.buf);
137 die("update line missing <ref>");
139 if ((next = parse_next_arg(next, &newvalue)) != NULL)
140 update_store_new_sha1(update, newvalue.buf);
142 die("update %s missing <newvalue>", ref.buf);
144 if ((next = parse_next_arg(next, &oldvalue)) != NULL)
145 update_store_old_sha1(update, oldvalue.buf);
146 else if(!line_termination)
147 die("update %s missing [<oldvalue>] NUL", ref.buf);
150 die("update %s has extra input: %s", ref.buf, next);
153 static void parse_cmd_create(const char *next)
155 struct strbuf ref = STRBUF_INIT;
156 struct strbuf newvalue = STRBUF_INIT;
157 struct ref_update *update;
159 update = update_alloc();
161 if ((next = parse_first_arg(next, &ref)) != NULL && ref.buf[0])
162 update_store_ref_name(update, ref.buf);
164 die("create line missing <ref>");
166 if ((next = parse_next_arg(next, &newvalue)) != NULL)
167 update_store_new_sha1(update, newvalue.buf);
169 die("create %s missing <newvalue>", ref.buf);
170 if (is_null_sha1(update->new_sha1))
171 die("create %s given zero new value", ref.buf);
174 die("create %s has extra input: %s", ref.buf, next);
177 static void parse_cmd_delete(const char *next)
179 struct strbuf ref = STRBUF_INIT;
180 struct strbuf oldvalue = STRBUF_INIT;
181 struct ref_update *update;
183 update = update_alloc();
185 if ((next = parse_first_arg(next, &ref)) != NULL && ref.buf[0])
186 update_store_ref_name(update, ref.buf);
188 die("delete line missing <ref>");
190 if ((next = parse_next_arg(next, &oldvalue)) != NULL)
191 update_store_old_sha1(update, oldvalue.buf);
192 else if(!line_termination)
193 die("delete %s missing [<oldvalue>] NUL", ref.buf);
194 if (update->have_old && is_null_sha1(update->old_sha1))
195 die("delete %s given zero old value", ref.buf);
198 die("delete %s has extra input: %s", ref.buf, next);
201 static void parse_cmd_verify(const char *next)
203 struct strbuf ref = STRBUF_INIT;
204 struct strbuf value = STRBUF_INIT;
205 struct ref_update *update;
207 update = update_alloc();
209 if ((next = parse_first_arg(next, &ref)) != NULL && ref.buf[0])
210 update_store_ref_name(update, ref.buf);
212 die("verify line missing <ref>");
214 if ((next = parse_next_arg(next, &value)) != NULL) {
215 update_store_old_sha1(update, value.buf);
216 update_store_new_sha1(update, value.buf);
217 } else if(!line_termination)
218 die("verify %s missing [<oldvalue>] NUL", ref.buf);
221 die("verify %s has extra input: %s", ref.buf, next);
224 static void parse_cmd_option(const char *next)
226 if (!strcmp(next, "no-deref"))
227 update_flags |= REF_NODEREF;
229 die("option unknown: %s", next);
232 static void update_refs_stdin(void)
234 struct strbuf cmd = STRBUF_INIT;
236 /* Read each line dispatch its command */
237 while (strbuf_getline(&cmd, stdin, line_termination) != EOF)
239 die("empty command in input");
240 else if (isspace(*cmd.buf))
241 die("whitespace before command: %s", cmd.buf);
242 else if (starts_with(cmd.buf, "update "))
243 parse_cmd_update(cmd.buf + 7);
244 else if (starts_with(cmd.buf, "create "))
245 parse_cmd_create(cmd.buf + 7);
246 else if (starts_with(cmd.buf, "delete "))
247 parse_cmd_delete(cmd.buf + 7);
248 else if (starts_with(cmd.buf, "verify "))
249 parse_cmd_verify(cmd.buf + 7);
250 else if (starts_with(cmd.buf, "option "))
251 parse_cmd_option(cmd.buf + 7);
253 die("unknown command: %s", cmd.buf);
255 strbuf_release(&cmd);
258 int cmd_update_ref(int argc, const char **argv, const char *prefix)
260 const char *refname, *oldval, *msg = NULL;
261 unsigned char sha1[20], oldsha1[20];
262 int delete = 0, no_deref = 0, read_stdin = 0, end_null = 0, flags = 0;
263 struct option options[] = {
264 OPT_STRING( 'm', NULL, &msg, N_("reason"), N_("reason of the update")),
265 OPT_BOOL('d', NULL, &delete, N_("delete the reference")),
266 OPT_BOOL( 0 , "no-deref", &no_deref,
267 N_("update <refname> not the one it points to")),
268 OPT_BOOL('z', NULL, &end_null, N_("stdin has NUL-terminated arguments")),
269 OPT_BOOL( 0 , "stdin", &read_stdin, N_("read updates from stdin")),
273 git_config(git_default_config, NULL);
274 argc = parse_options(argc, argv, prefix, options, git_update_ref_usage,
277 die("Refusing to perform update with empty message.");
280 if (delete || no_deref || argc > 0)
281 usage_with_options(git_update_ref_usage, options);
283 line_termination = '\0';
285 return update_refs(msg, updates, updates_count,
286 UPDATE_REFS_DIE_ON_ERR);
290 usage_with_options(git_update_ref_usage, options);
293 if (argc < 1 || argc > 2)
294 usage_with_options(git_update_ref_usage, options);
299 if (argc < 2 || argc > 3)
300 usage_with_options(git_update_ref_usage, options);
304 if (get_sha1(value, sha1))
305 die("%s: not a valid SHA1", value);
308 hashclr(oldsha1); /* all-zero hash in case oldval is the empty string */
309 if (oldval && *oldval && get_sha1(oldval, oldsha1))
310 die("%s: not a valid old SHA1", oldval);
315 return delete_ref(refname, oldval ? oldsha1 : NULL, flags);
317 return update_ref(msg, refname, sha1, oldval ? oldsha1 : NULL,
318 flags, UPDATE_REFS_DIE_ON_ERR);