Fix t7601-merge-pull-config.sh on AIX
[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
b7d96819
TL
9const char git_more_info_string[] =
10 "See 'git help COMMAND' for more information on a specific command.";
11
4394efec 12static int handle_options(const char*** argv, int* argc, int* envchanged)
4ab243a9
JS
13{
14 int handled = 0;
15
16 while (*argc > 0) {
17 const char *cmd = (*argv)[0];
18 if (cmd[0] != '-')
19 break;
20
6acbcb92
JS
21 /*
22 * For legacy reasons, the "version" and "help"
23 * commands can be written with "--" prepended
24 * to make them look like flags.
25 */
26 if (!strcmp(cmd, "--help") || !strcmp(cmd, "--version"))
27 break;
28
29 /*
30 * Check remaining flags.
31 */
cc44c765 32 if (!prefixcmp(cmd, "--exec-path")) {
6acbcb92
JS
33 cmd += 11;
34 if (*cmd == '=')
384df833 35 git_set_argv_exec_path(cmd + 1);
6acbcb92
JS
36 else {
37 puts(git_exec_path());
38 exit(0);
39 }
40 } else if (!strcmp(cmd, "-p") || !strcmp(cmd, "--paginate")) {
4ab243a9 41 setup_pager();
463a849d
MM
42 } else if (!strcmp(cmd, "--no-pager")) {
43 setenv("GIT_PAGER", "cat", 1);
44 if (envchanged)
45 *envchanged = 1;
6acbcb92 46 } else if (!strcmp(cmd, "--git-dir")) {
c321f00d
BG
47 if (*argc < 2) {
48 fprintf(stderr, "No directory given for --git-dir.\n" );
49 usage(git_usage_string);
50 }
45b09794 51 setenv(GIT_DIR_ENVIRONMENT, (*argv)[1], 1);
4394efec
ML
52 if (envchanged)
53 *envchanged = 1;
6acbcb92
JS
54 (*argv)++;
55 (*argc)--;
e4b02333 56 handled++;
cc44c765 57 } else if (!prefixcmp(cmd, "--git-dir=")) {
45b09794 58 setenv(GIT_DIR_ENVIRONMENT, cmd + 10, 1);
4394efec
ML
59 if (envchanged)
60 *envchanged = 1;
892c41b9
ML
61 } else if (!strcmp(cmd, "--work-tree")) {
62 if (*argc < 2) {
63 fprintf(stderr, "No directory given for --work-tree.\n" );
64 usage(git_usage_string);
65 }
66 setenv(GIT_WORK_TREE_ENVIRONMENT, (*argv)[1], 1);
4394efec
ML
67 if (envchanged)
68 *envchanged = 1;
892c41b9
ML
69 (*argv)++;
70 (*argc)--;
71 } else if (!prefixcmp(cmd, "--work-tree=")) {
72 setenv(GIT_WORK_TREE_ENVIRONMENT, cmd + 12, 1);
4394efec
ML
73 if (envchanged)
74 *envchanged = 1;
6acbcb92 75 } else if (!strcmp(cmd, "--bare")) {
ef5ddb2f 76 static char git_dir[PATH_MAX+1];
6adcca3f 77 is_bare_repository_cfg = 1;
9277d602 78 setenv(GIT_DIR_ENVIRONMENT, getcwd(git_dir, sizeof(git_dir)), 0);
4394efec
ML
79 if (envchanged)
80 *envchanged = 1;
6acbcb92
JS
81 } else {
82 fprintf(stderr, "Unknown option: %s\n", cmd);
822a7d50 83 usage(git_usage_string);
6acbcb92 84 }
4ab243a9
JS
85
86 (*argv)++;
87 (*argc)--;
88 handled++;
89 }
90 return handled;
91}
92
2b11e317
JS
93static int handle_alias(int *argcp, const char ***argv)
94{
af05d679 95 int envchanged = 0, ret = 0, saved_errno = errno;
2b11e317 96 const char *subdir;
0347a8c7
ML
97 int count, option_count;
98 const char** new_argv;
94351118
JK
99 const char *alias_command;
100 char *alias_string;
e85dc0a3 101 int unused_nongit;
2b11e317 102
e85dc0a3 103 subdir = setup_git_directory_gently(&unused_nongit);
0347a8c7
ML
104
105 alias_command = (*argv)[0];
94351118 106 alias_string = alias_lookup(alias_command);
0347a8c7 107 if (alias_string) {
dfd42a3c 108 if (alias_string[0] == '!') {
a2f8028d 109 if (*argcp > 1) {
7a33bcbe 110 struct strbuf buf;
a2f8028d 111
7a33bcbe
PH
112 strbuf_init(&buf, PATH_MAX);
113 strbuf_addstr(&buf, alias_string);
b319ce4c 114 sq_quote_argv(&buf, (*argv) + 1, PATH_MAX);
a2f8028d 115 free(alias_string);
7a33bcbe 116 alias_string = buf.buf;
a2f8028d 117 }
dfd42a3c
TT
118 trace_printf("trace: alias to shell cmd: %s => %s\n",
119 alias_command, alias_string + 1);
120 ret = system(alias_string + 1);
121 if (ret >= 0 && WIFEXITED(ret) &&
122 WEXITSTATUS(ret) != 127)
123 exit(WEXITSTATUS(ret));
124 die("Failed to run '%s' when expanding alias '%s'\n",
125 alias_string + 1, alias_command);
126 }
0347a8c7 127 count = split_cmdline(alias_string, &new_argv);
4394efec
ML
128 option_count = handle_options(&new_argv, &count, &envchanged);
129 if (envchanged)
130 die("alias '%s' changes environment variables\n"
131 "You can use '!git' in the alias to do this.",
132 alias_command);
0347a8c7
ML
133 memmove(new_argv - option_count, new_argv,
134 count * sizeof(char *));
135 new_argv -= option_count;
136
137 if (count < 1)
138 die("empty alias for %s", alias_command);
139
140 if (!strcmp(alias_command, new_argv[0]))
141 die("recursive alias: %s", alias_command);
142
b319ce4c 143 trace_argv_printf(new_argv,
6ce4e61f
CC
144 "trace: alias expansion: %s =>",
145 alias_command);
575ba9d6 146
83572c1a
JF
147 new_argv = xrealloc(new_argv, sizeof(char*) *
148 (count + *argcp + 1));
0347a8c7
ML
149 /* insert after command name */
150 memcpy(new_argv + count, *argv + 1, sizeof(char*) * *argcp);
151 new_argv[count+*argcp] = NULL;
2b11e317 152
0347a8c7
ML
153 *argv = new_argv;
154 *argcp += count - 1;
2b11e317 155
0347a8c7 156 ret = 1;
2b11e317
JS
157 }
158
159 if (subdir)
160 chdir(subdir);
161
47e5c0ca
JS
162 errno = saved_errno;
163
2b11e317
JS
164 return ret;
165}
166
70827b15 167const char git_version_string[] = GIT_VERSION;
5b84f4d8 168
efffea03
JH
169#define RUN_SETUP (1<<0)
170#define USE_PAGER (1<<1)
7eff28a9
SP
171/*
172 * require working tree to be present -- anything uses this needs
173 * RUN_SETUP for reading from the configuration file.
174 */
7ae3df8c 175#define NEED_WORK_TREE (1<<2)
a633fca0 176
47d0b4ff
LT
177struct cmd_struct {
178 const char *cmd;
179 int (*fn)(int, const char **, const char *);
180 int option;
181};
182
183static int run_command(struct cmd_struct *p, int argc, const char **argv)
184{
0f157315
LT
185 int status;
186 struct stat st;
47d0b4ff
LT
187 const char *prefix;
188
189 prefix = NULL;
190 if (p->option & RUN_SETUP)
191 prefix = setup_git_directory();
192 if (p->option & USE_PAGER)
193 setup_pager();
59f0f2f3
MH
194 if (p->option & NEED_WORK_TREE)
195 setup_work_tree();
196
b319ce4c 197 trace_argv_printf(argv, "trace: built-in: git");
47d0b4ff 198
0f157315
LT
199 status = p->fn(argc, argv, prefix);
200 if (status)
2488df84 201 return status & 0xff;
0f157315
LT
202
203 /* Somebody closed stdout? */
204 if (fstat(fileno(stdout), &st))
205 return 0;
206 /* Ignore write errors for pipes and sockets.. */
207 if (S_ISFIFO(st.st_mode) || S_ISSOCK(st.st_mode))
208 return 0;
209
210 /* Check for ENOSPC and EIO errors.. */
0227f988 211 if (fflush(stdout))
0f157315 212 die("write failure on standard output: %s", strerror(errno));
0227f988
LT
213 if (ferror(stdout))
214 die("unknown write failure on standard output");
215 if (fclose(stdout))
216 die("close failed on standard output: %s", strerror(errno));
0f157315 217 return 0;
47d0b4ff
LT
218}
219
220static void handle_internal_command(int argc, const char **argv)
231af832
LT
221{
222 const char *cmd = argv[0];
47d0b4ff 223 static struct cmd_struct commands[] = {
7ae3df8c 224 { "add", cmd_add, RUN_SETUP | NEED_WORK_TREE },
d97bc5de 225 { "annotate", cmd_annotate, RUN_SETUP },
f754fa9c 226 { "apply", cmd_apply },
265d5280 227 { "archive", cmd_archive },
4f0219a4 228 { "blame", cmd_blame, RUN_SETUP },
1da1b3a3 229 { "branch", cmd_branch, RUN_SETUP },
2e0afafe 230 { "bundle", cmd_bundle },
efffea03 231 { "cat-file", cmd_cat_file, RUN_SETUP },
782c2d65 232 { "checkout", cmd_checkout, RUN_SETUP | NEED_WORK_TREE },
4465f410
JS
233 { "checkout-index", cmd_checkout_index,
234 RUN_SETUP | NEED_WORK_TREE},
0864f264 235 { "check-ref-format", cmd_check_ref_format },
2d35d556 236 { "check-attr", cmd_check_attr, RUN_SETUP },
e827633a 237 { "cherry", cmd_cherry, RUN_SETUP },
7ae3df8c 238 { "cherry-pick", cmd_cherry_pick, RUN_SETUP | NEED_WORK_TREE },
8434c2f1 239 { "clone", cmd_clone },
113f10f2 240 { "clean", cmd_clean, RUN_SETUP | NEED_WORK_TREE },
f5bbc322 241 { "commit", cmd_commit, RUN_SETUP | NEED_WORK_TREE },
efffea03 242 { "commit-tree", cmd_commit_tree, RUN_SETUP },
e0d10e1c 243 { "config", cmd_config },
8112894d 244 { "count-objects", cmd_count_objects, RUN_SETUP },
9a0eaf83 245 { "describe", cmd_describe, RUN_SETUP },
89d07f75 246 { "diff", cmd_diff },
6304c29d 247 { "diff-files", cmd_diff_files, RUN_SETUP },
efffea03 248 { "diff-index", cmd_diff_index, RUN_SETUP },
efffea03 249 { "diff-tree", cmd_diff_tree, RUN_SETUP },
f2dc849e 250 { "fast-export", cmd_fast_export, RUN_SETUP },
b888d61c 251 { "fetch", cmd_fetch, RUN_SETUP },
2d4177c0 252 { "fetch-pack", cmd_fetch_pack, RUN_SETUP },
d4289fff 253 { "fetch--tool", cmd_fetch__tool, RUN_SETUP },
efffea03 254 { "fmt-merge-msg", cmd_fmt_merge_msg, RUN_SETUP },
9f613ddd 255 { "for-each-ref", cmd_for_each_ref, RUN_SETUP },
efffea03 256 { "format-patch", cmd_format_patch, RUN_SETUP },
b4dfefe0
MW
257 { "fsck", cmd_fsck, RUN_SETUP },
258 { "fsck-objects", cmd_fsck, RUN_SETUP },
6757ada4 259 { "gc", cmd_gc, RUN_SETUP },
f754fa9c 260 { "get-tar-commit-id", cmd_get_tar_commit_id },
34c6a82b 261 { "grep", cmd_grep, RUN_SETUP | USE_PAGER },
f754fa9c 262 { "help", cmd_help },
30ae764b
DB
263#ifndef NO_CURL
264 { "http-fetch", cmd_http_fetch, RUN_SETUP },
265#endif
515377ea 266 { "init", cmd_init_db },
f754fa9c 267 { "init-db", cmd_init_db },
efffea03
JH
268 { "log", cmd_log, RUN_SETUP | USE_PAGER },
269 { "ls-files", cmd_ls_files, RUN_SETUP },
270 { "ls-tree", cmd_ls_tree, RUN_SETUP },
8951d7c1 271 { "ls-remote", cmd_ls_remote },
f754fa9c
JH
272 { "mailinfo", cmd_mailinfo },
273 { "mailsplit", cmd_mailsplit },
71dfbf22 274 { "merge-base", cmd_merge_base, RUN_SETUP },
ba1f5f35 275 { "merge-file", cmd_merge_file },
a00a42ae 276 { "merge-ours", cmd_merge_ours, RUN_SETUP },
e1b3a2ca 277 { "merge-recursive", cmd_merge_recursive, RUN_SETUP | NEED_WORK_TREE },
1736855c 278 { "merge-subtree", cmd_merge_recursive, RUN_SETUP | NEED_WORK_TREE },
7ae3df8c 279 { "mv", cmd_mv, RUN_SETUP | NEED_WORK_TREE },
efffea03
JH
280 { "name-rev", cmd_name_rev, RUN_SETUP },
281 { "pack-objects", cmd_pack_objects, RUN_SETUP },
8951d7c1 282 { "peek-remote", cmd_ls_remote },
d97bc5de 283 { "pickaxe", cmd_blame, RUN_SETUP },
efffea03
JH
284 { "prune", cmd_prune, RUN_SETUP },
285 { "prune-packed", cmd_prune_packed, RUN_SETUP },
102cb085 286 { "push", cmd_push, RUN_SETUP },
efffea03 287 { "read-tree", cmd_read_tree, RUN_SETUP },
4264dc15 288 { "reflog", cmd_reflog, RUN_SETUP },
211c8968 289 { "remote", cmd_remote, RUN_SETUP },
e0d10e1c 290 { "repo-config", cmd_config },
658f3650 291 { "rerere", cmd_rerere, RUN_SETUP },
0e5a7faa 292 { "reset", cmd_reset, RUN_SETUP },
efffea03 293 { "rev-list", cmd_rev_list, RUN_SETUP },
5410a02a 294 { "rev-parse", cmd_rev_parse },
7ae3df8c 295 { "revert", cmd_revert, RUN_SETUP | NEED_WORK_TREE },
271bb087 296 { "rm", cmd_rm, RUN_SETUP },
96249c04 297 { "send-pack", cmd_send_pack, RUN_SETUP },
abe549e1 298 { "shortlog", cmd_shortlog, USE_PAGER },
efffea03
JH
299 { "show-branch", cmd_show_branch, RUN_SETUP },
300 { "show", cmd_show, RUN_SETUP | USE_PAGER },
c8af1de9 301 { "status", cmd_status, RUN_SETUP | NEED_WORK_TREE | USE_PAGER },
f754fa9c 302 { "stripspace", cmd_stripspace },
efffea03 303 { "symbolic-ref", cmd_symbolic_ref, RUN_SETUP },
62e09ce9 304 { "tag", cmd_tag, RUN_SETUP },
9cb90b80 305 { "tar-tree", cmd_tar_tree },
efffea03
JH
306 { "unpack-objects", cmd_unpack_objects, RUN_SETUP },
307 { "update-index", cmd_update_index, RUN_SETUP },
308 { "update-ref", cmd_update_ref, RUN_SETUP },
39345a21 309 { "upload-archive", cmd_upload_archive },
2ae68fcb 310 { "verify-tag", cmd_verify_tag, RUN_SETUP },
f754fa9c 311 { "version", cmd_version },
efffea03
JH
312 { "whatchanged", cmd_whatchanged, RUN_SETUP | USE_PAGER },
313 { "write-tree", cmd_write_tree, RUN_SETUP },
2e3ed670 314 { "verify-pack", cmd_verify_pack },
358ddb62 315 { "show-ref", cmd_show_ref, RUN_SETUP },
e1e22e37 316 { "pack-refs", cmd_pack_refs, RUN_SETUP },
231af832
LT
317 };
318 int i;
319
1cd95087
LT
320 /* Turn "git cmd --help" into "git help cmd" */
321 if (argc > 1 && !strcmp(argv[1], "--help")) {
322 argv[1] = argv[0];
323 argv[0] = cmd = "help";
324 }
325
231af832
LT
326 for (i = 0; i < ARRAY_SIZE(commands); i++) {
327 struct cmd_struct *p = commands+i;
328 if (strcmp(p->cmd, cmd))
329 continue;
47d0b4ff 330 exit(run_command(p, argc, argv));
231af832
LT
331 }
332}
333
47d0b4ff 334int main(int argc, const char **argv)
8e49d503 335{
5b6df8e4 336 const char *cmd = argv[0] ? argv[0] : "git-help";
231af832 337 char *slash = strrchr(cmd, '/');
511707d4 338 const char *cmd_path = NULL;
a025463b 339 int done_alias = 0;
231af832
LT
340
341 /*
342 * Take the basename of argv[0] as the command
343 * name, and the dirname as the default exec_path
43db492a 344 * if we don't have anything better.
231af832
LT
345 */
346 if (slash) {
347 *slash++ = 0;
511707d4 348 cmd_path = cmd;
231af832
LT
349 cmd = slash;
350 }
8e49d503 351
231af832
LT
352 /*
353 * "git-xxxx" is the same as "git xxxx", but we obviously:
354 *
355 * - cannot take flags in between the "git" and the "xxxx".
356 * - cannot execute it externally (since it would just do
357 * the same thing over again)
358 *
359 * So we just directly call the internal command handler, and
360 * die if that one cannot handle it.
361 */
cc44c765 362 if (!prefixcmp(cmd, "git-")) {
231af832
LT
363 cmd += 4;
364 argv[0] = cmd;
47d0b4ff 365 handle_internal_command(argc, argv);
231af832
LT
366 die("cannot handle %s internally", cmd);
367 }
8e49d503 368
231af832 369 /* Look for flags.. */
6acbcb92
JS
370 argv++;
371 argc--;
4394efec 372 handle_options(&argv, &argc, NULL);
6acbcb92 373 if (argc > 0) {
cc44c765 374 if (!prefixcmp(argv[0], "--"))
6acbcb92
JS
375 argv[0] += 2;
376 } else {
3d7e2d85
SP
377 /* The user didn't specify a command; give them help */
378 printf("usage: %s\n\n", git_usage_string);
379 list_common_cmds_help();
b7d96819 380 printf("\n%s\n", git_more_info_string);
3d7e2d85 381 exit(1);
97fc6c5f 382 }
6acbcb92 383 cmd = argv[0];
231af832
LT
384
385 /*
511707d4
SP
386 * We use PATH to find git commands, but we prepend some higher
387 * precidence paths: the "--exec-path" option, the GIT_EXEC_PATH
388 * environment, and the $(gitexecdir) from the Makefile at build
389 * time.
231af832 390 */
511707d4 391 setup_path(cmd_path);
8e49d503 392
a025463b
JH
393 while (1) {
394 /* See if it's an internal command */
47d0b4ff 395 handle_internal_command(argc, argv);
2b11e317 396
a025463b
JH
397 /* .. then try the external ones */
398 execv_git_cmd(argv);
231af832 399
a025463b
JH
400 /* It could be an alias -- this works around the insanity
401 * of overriding "git log" with "git show" by having
402 * alias.log = show
403 */
404 if (done_alias || !handle_alias(&argc, &argv))
405 break;
406 done_alias = 1;
407 }
10b15b86 408
f3dd015c
TT
409 if (errno == ENOENT) {
410 if (done_alias) {
411 fprintf(stderr, "Expansion of alias '%s' failed; "
412 "'%s' is not a git-command\n",
413 cmd, argv[0]);
414 exit(1);
415 }
822a7d50 416 help_unknown_cmd(cmd);
f3dd015c 417 }
10b15b86
AR
418
419 fprintf(stderr, "Failed to run command '%s': %s\n",
33ebb871 420 cmd, strerror(errno));
8e49d503
AE
421
422 return 1;
423}