Make git-remote a builtin
[git/git.git] / git.c
CommitLineData
85023577 1#include "builtin.h"
77cb17e9 2#include "exec_cmd.h"
2b11e317 3#include "cache.h"
575ba9d6 4#include "quote.h"
8e49d503 5
822a7d50 6const char git_usage_string[] =
463a849d 7 "git [--version] [--exec-path[=GIT_EXEC_PATH]] [-p|--paginate|--no-pager] [--bare] [--git-dir=GIT_DIR] [--work-tree=GIT_WORK_TREE] [--help] COMMAND [ARGS]";
822a7d50 8
4394efec 9static int handle_options(const char*** argv, int* argc, int* envchanged)
4ab243a9
JS
10{
11 int handled = 0;
12
13 while (*argc > 0) {
14 const char *cmd = (*argv)[0];
15 if (cmd[0] != '-')
16 break;
17
6acbcb92
JS
18 /*
19 * For legacy reasons, the "version" and "help"
20 * commands can be written with "--" prepended
21 * to make them look like flags.
22 */
23 if (!strcmp(cmd, "--help") || !strcmp(cmd, "--version"))
24 break;
25
26 /*
27 * Check remaining flags.
28 */
cc44c765 29 if (!prefixcmp(cmd, "--exec-path")) {
6acbcb92
JS
30 cmd += 11;
31 if (*cmd == '=')
384df833 32 git_set_argv_exec_path(cmd + 1);
6acbcb92
JS
33 else {
34 puts(git_exec_path());
35 exit(0);
36 }
37 } else if (!strcmp(cmd, "-p") || !strcmp(cmd, "--paginate")) {
4ab243a9 38 setup_pager();
463a849d
MM
39 } else if (!strcmp(cmd, "--no-pager")) {
40 setenv("GIT_PAGER", "cat", 1);
41 if (envchanged)
42 *envchanged = 1;
6acbcb92 43 } else if (!strcmp(cmd, "--git-dir")) {
c321f00d
BG
44 if (*argc < 2) {
45 fprintf(stderr, "No directory given for --git-dir.\n" );
46 usage(git_usage_string);
47 }
45b09794 48 setenv(GIT_DIR_ENVIRONMENT, (*argv)[1], 1);
4394efec
ML
49 if (envchanged)
50 *envchanged = 1;
6acbcb92
JS
51 (*argv)++;
52 (*argc)--;
e4b02333 53 handled++;
cc44c765 54 } else if (!prefixcmp(cmd, "--git-dir=")) {
45b09794 55 setenv(GIT_DIR_ENVIRONMENT, cmd + 10, 1);
4394efec
ML
56 if (envchanged)
57 *envchanged = 1;
892c41b9
ML
58 } else if (!strcmp(cmd, "--work-tree")) {
59 if (*argc < 2) {
60 fprintf(stderr, "No directory given for --work-tree.\n" );
61 usage(git_usage_string);
62 }
63 setenv(GIT_WORK_TREE_ENVIRONMENT, (*argv)[1], 1);
4394efec
ML
64 if (envchanged)
65 *envchanged = 1;
892c41b9
ML
66 (*argv)++;
67 (*argc)--;
68 } else if (!prefixcmp(cmd, "--work-tree=")) {
69 setenv(GIT_WORK_TREE_ENVIRONMENT, cmd + 12, 1);
4394efec
ML
70 if (envchanged)
71 *envchanged = 1;
6acbcb92 72 } else if (!strcmp(cmd, "--bare")) {
ef5ddb2f 73 static char git_dir[PATH_MAX+1];
6adcca3f 74 is_bare_repository_cfg = 1;
9277d602 75 setenv(GIT_DIR_ENVIRONMENT, getcwd(git_dir, sizeof(git_dir)), 0);
4394efec
ML
76 if (envchanged)
77 *envchanged = 1;
6acbcb92
JS
78 } else {
79 fprintf(stderr, "Unknown option: %s\n", cmd);
822a7d50 80 usage(git_usage_string);
6acbcb92 81 }
4ab243a9
JS
82
83 (*argv)++;
84 (*argc)--;
85 handled++;
86 }
87 return handled;
88}
89
2b11e317
JS
90static int split_cmdline(char *cmdline, const char ***argv)
91{
92 int src, dst, count = 0, size = 16;
93 char quoted = 0;
94
3301521a 95 *argv = xmalloc(sizeof(char*) * size);
2b11e317
JS
96
97 /* split alias_string */
98 (*argv)[count++] = cmdline;
99 for (src = dst = 0; cmdline[src];) {
100 char c = cmdline[src];
101 if (!quoted && isspace(c)) {
102 cmdline[dst++] = 0;
103 while (cmdline[++src]
104 && isspace(cmdline[src]))
105 ; /* skip */
106 if (count >= size) {
107 size += 16;
83572c1a 108 *argv = xrealloc(*argv, sizeof(char*) * size);
2b11e317
JS
109 }
110 (*argv)[count++] = cmdline + dst;
111 } else if(!quoted && (c == '\'' || c == '"')) {
112 quoted = c;
113 src++;
114 } else if (c == quoted) {
115 quoted = 0;
116 src++;
117 } else {
118 if (c == '\\' && quoted != '\'') {
119 src++;
120 c = cmdline[src];
121 if (!c) {
122 free(*argv);
123 *argv = NULL;
124 return error("cmdline ends with \\");
125 }
126 }
127 cmdline[dst++] = c;
128 src++;
129 }
130 }
131
132 cmdline[dst] = 0;
133
134 if (quoted) {
135 free(*argv);
136 *argv = NULL;
137 return error("unclosed quote");
138 }
139
140 return count;
141}
142
143static int handle_alias(int *argcp, const char ***argv)
144{
4394efec 145 int nongit = 0, envchanged = 0, ret = 0, saved_errno = errno;
2b11e317 146 const char *subdir;
0347a8c7
ML
147 int count, option_count;
148 const char** new_argv;
94351118
JK
149 const char *alias_command;
150 char *alias_string;
2b11e317
JS
151
152 subdir = setup_git_directory_gently(&nongit);
0347a8c7
ML
153
154 alias_command = (*argv)[0];
94351118 155 alias_string = alias_lookup(alias_command);
0347a8c7 156 if (alias_string) {
dfd42a3c 157 if (alias_string[0] == '!') {
a2f8028d 158 if (*argcp > 1) {
7a33bcbe 159 struct strbuf buf;
a2f8028d 160
7a33bcbe
PH
161 strbuf_init(&buf, PATH_MAX);
162 strbuf_addstr(&buf, alias_string);
b319ce4c 163 sq_quote_argv(&buf, (*argv) + 1, PATH_MAX);
a2f8028d 164 free(alias_string);
7a33bcbe 165 alias_string = buf.buf;
a2f8028d 166 }
dfd42a3c
TT
167 trace_printf("trace: alias to shell cmd: %s => %s\n",
168 alias_command, alias_string + 1);
169 ret = system(alias_string + 1);
170 if (ret >= 0 && WIFEXITED(ret) &&
171 WEXITSTATUS(ret) != 127)
172 exit(WEXITSTATUS(ret));
173 die("Failed to run '%s' when expanding alias '%s'\n",
174 alias_string + 1, alias_command);
175 }
0347a8c7 176 count = split_cmdline(alias_string, &new_argv);
4394efec
ML
177 option_count = handle_options(&new_argv, &count, &envchanged);
178 if (envchanged)
179 die("alias '%s' changes environment variables\n"
180 "You can use '!git' in the alias to do this.",
181 alias_command);
0347a8c7
ML
182 memmove(new_argv - option_count, new_argv,
183 count * sizeof(char *));
184 new_argv -= option_count;
185
186 if (count < 1)
187 die("empty alias for %s", alias_command);
188
189 if (!strcmp(alias_command, new_argv[0]))
190 die("recursive alias: %s", alias_command);
191
b319ce4c 192 trace_argv_printf(new_argv,
6ce4e61f
CC
193 "trace: alias expansion: %s =>",
194 alias_command);
575ba9d6 195
83572c1a
JF
196 new_argv = xrealloc(new_argv, sizeof(char*) *
197 (count + *argcp + 1));
0347a8c7
ML
198 /* insert after command name */
199 memcpy(new_argv + count, *argv + 1, sizeof(char*) * *argcp);
200 new_argv[count+*argcp] = NULL;
2b11e317 201
0347a8c7
ML
202 *argv = new_argv;
203 *argcp += count - 1;
2b11e317 204
0347a8c7 205 ret = 1;
2b11e317
JS
206 }
207
208 if (subdir)
209 chdir(subdir);
210
47e5c0ca
JS
211 errno = saved_errno;
212
2b11e317
JS
213 return ret;
214}
215
70827b15 216const char git_version_string[] = GIT_VERSION;
5b84f4d8 217
efffea03
JH
218#define RUN_SETUP (1<<0)
219#define USE_PAGER (1<<1)
7eff28a9
SP
220/*
221 * require working tree to be present -- anything uses this needs
222 * RUN_SETUP for reading from the configuration file.
223 */
7ae3df8c 224#define NEED_WORK_TREE (1<<2)
a633fca0 225
47d0b4ff
LT
226struct cmd_struct {
227 const char *cmd;
228 int (*fn)(int, const char **, const char *);
229 int option;
230};
231
232static int run_command(struct cmd_struct *p, int argc, const char **argv)
233{
0f157315
LT
234 int status;
235 struct stat st;
47d0b4ff
LT
236 const char *prefix;
237
238 prefix = NULL;
239 if (p->option & RUN_SETUP)
240 prefix = setup_git_directory();
241 if (p->option & USE_PAGER)
242 setup_pager();
59f0f2f3
MH
243 if (p->option & NEED_WORK_TREE)
244 setup_work_tree();
245
b319ce4c 246 trace_argv_printf(argv, "trace: built-in: git");
47d0b4ff 247
0f157315
LT
248 status = p->fn(argc, argv, prefix);
249 if (status)
2488df84 250 return status & 0xff;
0f157315
LT
251
252 /* Somebody closed stdout? */
253 if (fstat(fileno(stdout), &st))
254 return 0;
255 /* Ignore write errors for pipes and sockets.. */
256 if (S_ISFIFO(st.st_mode) || S_ISSOCK(st.st_mode))
257 return 0;
258
259 /* Check for ENOSPC and EIO errors.. */
0227f988 260 if (fflush(stdout))
0f157315 261 die("write failure on standard output: %s", strerror(errno));
0227f988
LT
262 if (ferror(stdout))
263 die("unknown write failure on standard output");
264 if (fclose(stdout))
265 die("close failed on standard output: %s", strerror(errno));
0f157315 266 return 0;
47d0b4ff
LT
267}
268
269static void handle_internal_command(int argc, const char **argv)
231af832
LT
270{
271 const char *cmd = argv[0];
47d0b4ff 272 static struct cmd_struct commands[] = {
7ae3df8c 273 { "add", cmd_add, RUN_SETUP | NEED_WORK_TREE },
d97bc5de 274 { "annotate", cmd_annotate, RUN_SETUP },
f754fa9c 275 { "apply", cmd_apply },
265d5280 276 { "archive", cmd_archive },
4f0219a4 277 { "blame", cmd_blame, RUN_SETUP },
1da1b3a3 278 { "branch", cmd_branch, RUN_SETUP },
2e0afafe 279 { "bundle", cmd_bundle },
efffea03 280 { "cat-file", cmd_cat_file, RUN_SETUP },
782c2d65 281 { "checkout", cmd_checkout, RUN_SETUP | NEED_WORK_TREE },
4465f410
JS
282 { "checkout-index", cmd_checkout_index,
283 RUN_SETUP | NEED_WORK_TREE},
0864f264 284 { "check-ref-format", cmd_check_ref_format },
7ae3df8c 285 { "check-attr", cmd_check_attr, RUN_SETUP | NEED_WORK_TREE },
e827633a 286 { "cherry", cmd_cherry, RUN_SETUP },
7ae3df8c 287 { "cherry-pick", cmd_cherry_pick, RUN_SETUP | NEED_WORK_TREE },
113f10f2 288 { "clean", cmd_clean, RUN_SETUP | NEED_WORK_TREE },
f5bbc322 289 { "commit", cmd_commit, RUN_SETUP | NEED_WORK_TREE },
efffea03 290 { "commit-tree", cmd_commit_tree, RUN_SETUP },
e0d10e1c 291 { "config", cmd_config },
8112894d 292 { "count-objects", cmd_count_objects, RUN_SETUP },
9a0eaf83 293 { "describe", cmd_describe, RUN_SETUP },
89d07f75 294 { "diff", cmd_diff },
d516c2d1 295 { "diff-files", cmd_diff_files },
efffea03 296 { "diff-index", cmd_diff_index, RUN_SETUP },
efffea03 297 { "diff-tree", cmd_diff_tree, RUN_SETUP },
f2dc849e 298 { "fast-export", cmd_fast_export, RUN_SETUP },
b888d61c 299 { "fetch", cmd_fetch, RUN_SETUP },
2d4177c0 300 { "fetch-pack", cmd_fetch_pack, RUN_SETUP },
d4289fff 301 { "fetch--tool", cmd_fetch__tool, RUN_SETUP },
efffea03 302 { "fmt-merge-msg", cmd_fmt_merge_msg, RUN_SETUP },
9f613ddd 303 { "for-each-ref", cmd_for_each_ref, RUN_SETUP },
efffea03 304 { "format-patch", cmd_format_patch, RUN_SETUP },
b4dfefe0
MW
305 { "fsck", cmd_fsck, RUN_SETUP },
306 { "fsck-objects", cmd_fsck, RUN_SETUP },
6757ada4 307 { "gc", cmd_gc, RUN_SETUP },
f754fa9c 308 { "get-tar-commit-id", cmd_get_tar_commit_id },
34c6a82b 309 { "grep", cmd_grep, RUN_SETUP | USE_PAGER },
f754fa9c 310 { "help", cmd_help },
30ae764b
DB
311#ifndef NO_CURL
312 { "http-fetch", cmd_http_fetch, RUN_SETUP },
313#endif
515377ea 314 { "init", cmd_init_db },
f754fa9c 315 { "init-db", cmd_init_db },
efffea03
JH
316 { "log", cmd_log, RUN_SETUP | USE_PAGER },
317 { "ls-files", cmd_ls_files, RUN_SETUP },
318 { "ls-tree", cmd_ls_tree, RUN_SETUP },
8951d7c1 319 { "ls-remote", cmd_ls_remote },
f754fa9c
JH
320 { "mailinfo", cmd_mailinfo },
321 { "mailsplit", cmd_mailsplit },
71dfbf22 322 { "merge-base", cmd_merge_base, RUN_SETUP },
ba1f5f35 323 { "merge-file", cmd_merge_file },
a00a42ae 324 { "merge-ours", cmd_merge_ours, RUN_SETUP },
e1b3a2ca 325 { "merge-recursive", cmd_merge_recursive, RUN_SETUP | NEED_WORK_TREE },
1736855c 326 { "merge-subtree", cmd_merge_recursive, RUN_SETUP | NEED_WORK_TREE },
7ae3df8c 327 { "mv", cmd_mv, RUN_SETUP | NEED_WORK_TREE },
efffea03
JH
328 { "name-rev", cmd_name_rev, RUN_SETUP },
329 { "pack-objects", cmd_pack_objects, RUN_SETUP },
8951d7c1 330 { "peek-remote", cmd_ls_remote },
d97bc5de 331 { "pickaxe", cmd_blame, RUN_SETUP },
efffea03
JH
332 { "prune", cmd_prune, RUN_SETUP },
333 { "prune-packed", cmd_prune_packed, RUN_SETUP },
102cb085 334 { "push", cmd_push, RUN_SETUP },
efffea03 335 { "read-tree", cmd_read_tree, RUN_SETUP },
4264dc15 336 { "reflog", cmd_reflog, RUN_SETUP },
211c8968 337 { "remote", cmd_remote, RUN_SETUP },
e0d10e1c 338 { "repo-config", cmd_config },
658f3650 339 { "rerere", cmd_rerere, RUN_SETUP },
0e5a7faa 340 { "reset", cmd_reset, RUN_SETUP },
efffea03 341 { "rev-list", cmd_rev_list, RUN_SETUP },
5410a02a 342 { "rev-parse", cmd_rev_parse },
7ae3df8c 343 { "revert", cmd_revert, RUN_SETUP | NEED_WORK_TREE },
271bb087 344 { "rm", cmd_rm, RUN_SETUP },
96249c04 345 { "send-pack", cmd_send_pack, RUN_SETUP },
1d541c12 346 { "shortlog", cmd_shortlog, RUN_SETUP | USE_PAGER },
efffea03
JH
347 { "show-branch", cmd_show_branch, RUN_SETUP },
348 { "show", cmd_show, RUN_SETUP | USE_PAGER },
f5bbc322 349 { "status", cmd_status, RUN_SETUP | NEED_WORK_TREE },
f754fa9c 350 { "stripspace", cmd_stripspace },
efffea03 351 { "symbolic-ref", cmd_symbolic_ref, RUN_SETUP },
62e09ce9 352 { "tag", cmd_tag, RUN_SETUP },
9cb90b80 353 { "tar-tree", cmd_tar_tree },
efffea03
JH
354 { "unpack-objects", cmd_unpack_objects, RUN_SETUP },
355 { "update-index", cmd_update_index, RUN_SETUP },
356 { "update-ref", cmd_update_ref, RUN_SETUP },
39345a21 357 { "upload-archive", cmd_upload_archive },
2ae68fcb 358 { "verify-tag", cmd_verify_tag, RUN_SETUP },
f754fa9c 359 { "version", cmd_version },
efffea03
JH
360 { "whatchanged", cmd_whatchanged, RUN_SETUP | USE_PAGER },
361 { "write-tree", cmd_write_tree, RUN_SETUP },
2e3ed670 362 { "verify-pack", cmd_verify_pack },
358ddb62 363 { "show-ref", cmd_show_ref, RUN_SETUP },
e1e22e37 364 { "pack-refs", cmd_pack_refs, RUN_SETUP },
231af832
LT
365 };
366 int i;
367
1cd95087
LT
368 /* Turn "git cmd --help" into "git help cmd" */
369 if (argc > 1 && !strcmp(argv[1], "--help")) {
370 argv[1] = argv[0];
371 argv[0] = cmd = "help";
372 }
373
231af832
LT
374 for (i = 0; i < ARRAY_SIZE(commands); i++) {
375 struct cmd_struct *p = commands+i;
376 if (strcmp(p->cmd, cmd))
377 continue;
47d0b4ff 378 exit(run_command(p, argc, argv));
231af832
LT
379 }
380}
381
47d0b4ff 382int main(int argc, const char **argv)
8e49d503 383{
5b6df8e4 384 const char *cmd = argv[0] ? argv[0] : "git-help";
231af832 385 char *slash = strrchr(cmd, '/');
511707d4 386 const char *cmd_path = NULL;
a025463b 387 int done_alias = 0;
231af832
LT
388
389 /*
390 * Take the basename of argv[0] as the command
391 * name, and the dirname as the default exec_path
43db492a 392 * if we don't have anything better.
231af832
LT
393 */
394 if (slash) {
395 *slash++ = 0;
511707d4 396 cmd_path = cmd;
231af832
LT
397 cmd = slash;
398 }
8e49d503 399
231af832
LT
400 /*
401 * "git-xxxx" is the same as "git xxxx", but we obviously:
402 *
403 * - cannot take flags in between the "git" and the "xxxx".
404 * - cannot execute it externally (since it would just do
405 * the same thing over again)
406 *
407 * So we just directly call the internal command handler, and
408 * die if that one cannot handle it.
409 */
cc44c765 410 if (!prefixcmp(cmd, "git-")) {
231af832
LT
411 cmd += 4;
412 argv[0] = cmd;
47d0b4ff 413 handle_internal_command(argc, argv);
231af832
LT
414 die("cannot handle %s internally", cmd);
415 }
8e49d503 416
231af832 417 /* Look for flags.. */
6acbcb92
JS
418 argv++;
419 argc--;
4394efec 420 handle_options(&argv, &argc, NULL);
6acbcb92 421 if (argc > 0) {
cc44c765 422 if (!prefixcmp(argv[0], "--"))
6acbcb92
JS
423 argv[0] += 2;
424 } else {
3d7e2d85
SP
425 /* The user didn't specify a command; give them help */
426 printf("usage: %s\n\n", git_usage_string);
427 list_common_cmds_help();
428 exit(1);
97fc6c5f 429 }
6acbcb92 430 cmd = argv[0];
231af832
LT
431
432 /*
511707d4
SP
433 * We use PATH to find git commands, but we prepend some higher
434 * precidence paths: the "--exec-path" option, the GIT_EXEC_PATH
435 * environment, and the $(gitexecdir) from the Makefile at build
436 * time.
231af832 437 */
511707d4 438 setup_path(cmd_path);
8e49d503 439
a025463b
JH
440 while (1) {
441 /* See if it's an internal command */
47d0b4ff 442 handle_internal_command(argc, argv);
2b11e317 443
a025463b
JH
444 /* .. then try the external ones */
445 execv_git_cmd(argv);
231af832 446
a025463b
JH
447 /* It could be an alias -- this works around the insanity
448 * of overriding "git log" with "git show" by having
449 * alias.log = show
450 */
451 if (done_alias || !handle_alias(&argc, &argv))
452 break;
453 done_alias = 1;
454 }
10b15b86 455
f3dd015c
TT
456 if (errno == ENOENT) {
457 if (done_alias) {
458 fprintf(stderr, "Expansion of alias '%s' failed; "
459 "'%s' is not a git-command\n",
460 cmd, argv[0]);
461 exit(1);
462 }
822a7d50 463 help_unknown_cmd(cmd);
f3dd015c 464 }
10b15b86
AR
465
466 fprintf(stderr, "Failed to run command '%s': %s\n",
33ebb871 467 cmd, strerror(errno));
8e49d503
AE
468
469 return 1;
470}