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Commit | Line | Data |
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85023577 | 1 | #include "builtin.h" |
fd5c363d TF |
2 | #include "exec_cmd.h" |
3 | #include "help.h" | |
d8e96fd8 | 4 | #include "run-command.h" |
8e49d503 | 5 | |
822a7d50 | 6 | const char git_usage_string[] = |
44e1e4d6 | 7 | "git [--version] [--help] [-C <path>] [-c name=value]\n" |
03a0fb0c | 8 | " [--exec-path[=<path>]] [--html-path] [--man-path] [--info-path]\n" |
9c9b4f2f | 9 | " [-p | --paginate | --no-pager] [--no-replace-objects] [--bare]\n" |
a1bea2c1 | 10 | " [--git-dir=<path>] [--work-tree=<path>] [--namespace=<name>]\n" |
62b4698e | 11 | " <command> [<args>]"; |
822a7d50 | 12 | |
b7d96819 | 13 | const char git_more_info_string[] = |
ad5fe377 | 14 | N_("'git help -a' and 'git help -g' list available subcommands and some\n" |
73903d0b PO |
15 | "concept guides. See 'git help <command>' or 'git help <concept>'\n" |
16 | "to read about a specific subcommand or concept."); | |
b7d96819 | 17 | |
e37c1329 | 18 | static struct startup_info git_startup_info; |
4e10738a | 19 | static int use_pager = -1; |
f655651e | 20 | static char *orig_cwd; |
c0562611 NTND |
21 | static const char *env_names[] = { |
22 | GIT_DIR_ENVIRONMENT, | |
23 | GIT_WORK_TREE_ENVIRONMENT, | |
24 | GIT_IMPLICIT_WORK_TREE_ENVIRONMENT, | |
25 | GIT_PREFIX_ENVIRONMENT | |
26 | }; | |
27 | static char *orig_env[4]; | |
2e1175d4 | 28 | static int save_restore_env_balance; |
c0562611 | 29 | |
0d5466d2 | 30 | static void save_env_before_alias(void) |
c0562611 NTND |
31 | { |
32 | int i; | |
2e1175d4 JH |
33 | |
34 | assert(save_restore_env_balance == 0); | |
35 | save_restore_env_balance = 1; | |
f655651e | 36 | orig_cwd = xgetcwd(); |
c0562611 NTND |
37 | for (i = 0; i < ARRAY_SIZE(env_names); i++) { |
38 | orig_env[i] = getenv(env_names[i]); | |
39 | if (orig_env[i]) | |
40 | orig_env[i] = xstrdup(orig_env[i]); | |
41 | } | |
42 | } | |
43 | ||
57ea7123 | 44 | static void restore_env(int external_alias) |
c0562611 NTND |
45 | { |
46 | int i; | |
2e1175d4 JH |
47 | |
48 | assert(save_restore_env_balance == 1); | |
49 | save_restore_env_balance = 0; | |
57ea7123 | 50 | if (!external_alias && orig_cwd && chdir(orig_cwd)) |
c0562611 | 51 | die_errno("could not move to %s", orig_cwd); |
f655651e | 52 | free(orig_cwd); |
c0562611 | 53 | for (i = 0; i < ARRAY_SIZE(env_names); i++) { |
57ea7123 NTND |
54 | if (external_alias && |
55 | !strcmp(env_names[i], GIT_PREFIX_ENVIRONMENT)) | |
56 | continue; | |
c0562611 NTND |
57 | if (orig_env[i]) |
58 | setenv(env_names[i], orig_env[i], 1); | |
59 | else | |
60 | unsetenv(env_names[i]); | |
61 | } | |
62 | } | |
4e10738a JK |
63 | |
64 | static void commit_pager_choice(void) { | |
65 | switch (use_pager) { | |
66 | case 0: | |
67 | setenv("GIT_PAGER", "cat", 1); | |
68 | break; | |
69 | case 1: | |
70 | setup_pager(); | |
71 | break; | |
72 | default: | |
73 | break; | |
74 | } | |
75 | } | |
76 | ||
4b25d091 | 77 | static int handle_options(const char ***argv, int *argc, int *envchanged) |
4ab243a9 | 78 | { |
73546c08 | 79 | const char **orig_argv = *argv; |
4ab243a9 JS |
80 | |
81 | while (*argc > 0) { | |
82 | const char *cmd = (*argv)[0]; | |
83 | if (cmd[0] != '-') | |
84 | break; | |
85 | ||
6acbcb92 JS |
86 | /* |
87 | * For legacy reasons, the "version" and "help" | |
88 | * commands can be written with "--" prepended | |
89 | * to make them look like flags. | |
90 | */ | |
91 | if (!strcmp(cmd, "--help") || !strcmp(cmd, "--version")) | |
92 | break; | |
93 | ||
94 | /* | |
95 | * Check remaining flags. | |
96 | */ | |
ae021d87 | 97 | if (skip_prefix(cmd, "--exec-path", &cmd)) { |
6acbcb92 | 98 | if (*cmd == '=') |
384df833 | 99 | git_set_argv_exec_path(cmd + 1); |
6acbcb92 JS |
100 | else { |
101 | puts(git_exec_path()); | |
102 | exit(0); | |
103 | } | |
89a56bfb MH |
104 | } else if (!strcmp(cmd, "--html-path")) { |
105 | puts(system_path(GIT_HTML_PATH)); | |
106 | exit(0); | |
f2dd8c37 JS |
107 | } else if (!strcmp(cmd, "--man-path")) { |
108 | puts(system_path(GIT_MAN_PATH)); | |
109 | exit(0); | |
110 | } else if (!strcmp(cmd, "--info-path")) { | |
111 | puts(system_path(GIT_INFO_PATH)); | |
112 | exit(0); | |
6acbcb92 | 113 | } else if (!strcmp(cmd, "-p") || !strcmp(cmd, "--paginate")) { |
4e10738a | 114 | use_pager = 1; |
463a849d | 115 | } else if (!strcmp(cmd, "--no-pager")) { |
4e10738a | 116 | use_pager = 0; |
463a849d MM |
117 | if (envchanged) |
118 | *envchanged = 1; | |
b0fa7ab5 | 119 | } else if (!strcmp(cmd, "--no-replace-objects")) { |
afc711b8 | 120 | check_replace_refs = 0; |
6476b38b CC |
121 | setenv(NO_REPLACE_OBJECTS_ENVIRONMENT, "1", 1); |
122 | if (envchanged) | |
123 | *envchanged = 1; | |
6acbcb92 | 124 | } else if (!strcmp(cmd, "--git-dir")) { |
c321f00d BG |
125 | if (*argc < 2) { |
126 | fprintf(stderr, "No directory given for --git-dir.\n" ); | |
127 | usage(git_usage_string); | |
128 | } | |
45b09794 | 129 | setenv(GIT_DIR_ENVIRONMENT, (*argv)[1], 1); |
4394efec ML |
130 | if (envchanged) |
131 | *envchanged = 1; | |
6acbcb92 JS |
132 | (*argv)++; |
133 | (*argc)--; | |
ae021d87 JK |
134 | } else if (skip_prefix(cmd, "--git-dir=", &cmd)) { |
135 | setenv(GIT_DIR_ENVIRONMENT, cmd, 1); | |
4394efec ML |
136 | if (envchanged) |
137 | *envchanged = 1; | |
a1bea2c1 JT |
138 | } else if (!strcmp(cmd, "--namespace")) { |
139 | if (*argc < 2) { | |
140 | fprintf(stderr, "No namespace given for --namespace.\n" ); | |
141 | usage(git_usage_string); | |
142 | } | |
143 | setenv(GIT_NAMESPACE_ENVIRONMENT, (*argv)[1], 1); | |
144 | if (envchanged) | |
145 | *envchanged = 1; | |
146 | (*argv)++; | |
147 | (*argc)--; | |
ae021d87 JK |
148 | } else if (skip_prefix(cmd, "--namespace=", &cmd)) { |
149 | setenv(GIT_NAMESPACE_ENVIRONMENT, cmd, 1); | |
a1bea2c1 JT |
150 | if (envchanged) |
151 | *envchanged = 1; | |
892c41b9 ML |
152 | } else if (!strcmp(cmd, "--work-tree")) { |
153 | if (*argc < 2) { | |
154 | fprintf(stderr, "No directory given for --work-tree.\n" ); | |
155 | usage(git_usage_string); | |
156 | } | |
157 | setenv(GIT_WORK_TREE_ENVIRONMENT, (*argv)[1], 1); | |
4394efec ML |
158 | if (envchanged) |
159 | *envchanged = 1; | |
892c41b9 ML |
160 | (*argv)++; |
161 | (*argc)--; | |
ae021d87 JK |
162 | } else if (skip_prefix(cmd, "--work-tree=", &cmd)) { |
163 | setenv(GIT_WORK_TREE_ENVIRONMENT, cmd, 1); | |
4394efec ML |
164 | if (envchanged) |
165 | *envchanged = 1; | |
6acbcb92 | 166 | } else if (!strcmp(cmd, "--bare")) { |
4d3ab44d | 167 | char *cwd = xgetcwd(); |
6adcca3f | 168 | is_bare_repository_cfg = 1; |
4d3ab44d RS |
169 | setenv(GIT_DIR_ENVIRONMENT, cwd, 0); |
170 | free(cwd); | |
2cd83d10 | 171 | setenv(GIT_IMPLICIT_WORK_TREE_ENVIRONMENT, "0", 1); |
4394efec ML |
172 | if (envchanged) |
173 | *envchanged = 1; | |
8b1fa778 AR |
174 | } else if (!strcmp(cmd, "-c")) { |
175 | if (*argc < 2) { | |
176 | fprintf(stderr, "-c expects a configuration string\n" ); | |
177 | usage(git_usage_string); | |
178 | } | |
2b64fc89 | 179 | git_config_push_parameter((*argv)[1]); |
8b1fa778 AR |
180 | (*argv)++; |
181 | (*argc)--; | |
823ab40f JK |
182 | } else if (!strcmp(cmd, "--literal-pathspecs")) { |
183 | setenv(GIT_LITERAL_PATHSPECS_ENVIRONMENT, "1", 1); | |
184 | if (envchanged) | |
185 | *envchanged = 1; | |
186 | } else if (!strcmp(cmd, "--no-literal-pathspecs")) { | |
187 | setenv(GIT_LITERAL_PATHSPECS_ENVIRONMENT, "0", 1); | |
188 | if (envchanged) | |
189 | *envchanged = 1; | |
bd30c2e4 NTND |
190 | } else if (!strcmp(cmd, "--glob-pathspecs")) { |
191 | setenv(GIT_GLOB_PATHSPECS_ENVIRONMENT, "1", 1); | |
192 | if (envchanged) | |
193 | *envchanged = 1; | |
194 | } else if (!strcmp(cmd, "--noglob-pathspecs")) { | |
195 | setenv(GIT_NOGLOB_PATHSPECS_ENVIRONMENT, "1", 1); | |
196 | if (envchanged) | |
197 | *envchanged = 1; | |
93d93537 NTND |
198 | } else if (!strcmp(cmd, "--icase-pathspecs")) { |
199 | setenv(GIT_ICASE_PATHSPECS_ENVIRONMENT, "1", 1); | |
200 | if (envchanged) | |
201 | *envchanged = 1; | |
6035d6aa NTND |
202 | } else if (!strcmp(cmd, "--shallow-file")) { |
203 | (*argv)++; | |
204 | (*argc)--; | |
069c0532 | 205 | set_alternate_shallow_file((*argv)[0], 1); |
6035d6aa NTND |
206 | if (envchanged) |
207 | *envchanged = 1; | |
44e1e4d6 NR |
208 | } else if (!strcmp(cmd, "-C")) { |
209 | if (*argc < 2) { | |
210 | fprintf(stderr, "No directory given for -C.\n" ); | |
211 | usage(git_usage_string); | |
212 | } | |
6a536e20 KN |
213 | if ((*argv)[1][0]) { |
214 | if (chdir((*argv)[1])) | |
215 | die_errno("Cannot change to '%s'", (*argv)[1]); | |
216 | if (envchanged) | |
217 | *envchanged = 1; | |
218 | } | |
44e1e4d6 NR |
219 | (*argv)++; |
220 | (*argc)--; | |
6acbcb92 JS |
221 | } else { |
222 | fprintf(stderr, "Unknown option: %s\n", cmd); | |
822a7d50 | 223 | usage(git_usage_string); |
6acbcb92 | 224 | } |
4ab243a9 JS |
225 | |
226 | (*argv)++; | |
227 | (*argc)--; | |
4ab243a9 | 228 | } |
73546c08 | 229 | return (*argv) - orig_argv; |
4ab243a9 JS |
230 | } |
231 | ||
2b11e317 JS |
232 | static int handle_alias(int *argcp, const char ***argv) |
233 | { | |
af05d679 | 234 | int envchanged = 0, ret = 0, saved_errno = errno; |
0347a8c7 | 235 | int count, option_count; |
4b25d091 | 236 | const char **new_argv; |
94351118 JK |
237 | const char *alias_command; |
238 | char *alias_string; | |
e85dc0a3 | 239 | int unused_nongit; |
2b11e317 | 240 | |
0d5466d2 | 241 | save_env_before_alias(); |
86d26f24 | 242 | setup_git_directory_gently(&unused_nongit); |
0347a8c7 ML |
243 | |
244 | alias_command = (*argv)[0]; | |
94351118 | 245 | alias_string = alias_lookup(alias_command); |
0347a8c7 | 246 | if (alias_string) { |
dfd42a3c | 247 | if (alias_string[0] == '!') { |
7f51f8bc EFL |
248 | const char **alias_argv; |
249 | int argc = *argcp, i; | |
250 | ||
030149a4 | 251 | commit_pager_choice(); |
57ea7123 | 252 | restore_env(1); |
7f51f8bc EFL |
253 | |
254 | /* build alias_argv */ | |
255 | alias_argv = xmalloc(sizeof(*alias_argv) * (argc + 1)); | |
256 | alias_argv[0] = alias_string + 1; | |
257 | for (i = 1; i < argc; ++i) | |
258 | alias_argv[i] = (*argv)[i]; | |
259 | alias_argv[argc] = NULL; | |
260 | ||
26b05251 | 261 | ret = run_command_v_opt(alias_argv, RUN_USING_SHELL); |
7f51f8bc EFL |
262 | if (ret >= 0) /* normal exit */ |
263 | exit(ret); | |
264 | ||
265 | die_errno("While expanding alias '%s': '%s'", | |
266 | alias_command, alias_string + 1); | |
dfd42a3c | 267 | } |
0347a8c7 | 268 | count = split_cmdline(alias_string, &new_argv); |
dc4179f9 | 269 | if (count < 0) |
ad9ac6db GB |
270 | die("Bad alias.%s string: %s", alias_command, |
271 | split_cmdline_strerror(count)); | |
4394efec ML |
272 | option_count = handle_options(&new_argv, &count, &envchanged); |
273 | if (envchanged) | |
274 | die("alias '%s' changes environment variables\n" | |
275 | "You can use '!git' in the alias to do this.", | |
276 | alias_command); | |
0347a8c7 ML |
277 | memmove(new_argv - option_count, new_argv, |
278 | count * sizeof(char *)); | |
279 | new_argv -= option_count; | |
280 | ||
281 | if (count < 1) | |
282 | die("empty alias for %s", alias_command); | |
283 | ||
284 | if (!strcmp(alias_command, new_argv[0])) | |
285 | die("recursive alias: %s", alias_command); | |
286 | ||
b319ce4c | 287 | trace_argv_printf(new_argv, |
6ce4e61f CC |
288 | "trace: alias expansion: %s =>", |
289 | alias_command); | |
575ba9d6 | 290 | |
2756ca43 | 291 | REALLOC_ARRAY(new_argv, count + *argcp); |
0347a8c7 | 292 | /* insert after command name */ |
4b25d091 | 293 | memcpy(new_argv + count, *argv + 1, sizeof(char *) * *argcp); |
2b11e317 | 294 | |
0347a8c7 ML |
295 | *argv = new_argv; |
296 | *argcp += count - 1; | |
2b11e317 | 297 | |
0347a8c7 | 298 | ret = 1; |
2b11e317 JS |
299 | } |
300 | ||
57ea7123 | 301 | restore_env(0); |
2b11e317 | 302 | |
47e5c0ca JS |
303 | errno = saved_errno; |
304 | ||
2b11e317 JS |
305 | return ret; |
306 | } | |
307 | ||
ee38dfb8 NTND |
308 | #define RUN_SETUP (1<<0) |
309 | #define RUN_SETUP_GENTLY (1<<1) | |
310 | #define USE_PAGER (1<<2) | |
7eff28a9 SP |
311 | /* |
312 | * require working tree to be present -- anything uses this needs | |
313 | * RUN_SETUP for reading from the configuration file. | |
314 | */ | |
ee38dfb8 | 315 | #define NEED_WORK_TREE (1<<3) |
a633fca0 | 316 | |
47d0b4ff LT |
317 | struct cmd_struct { |
318 | const char *cmd; | |
319 | int (*fn)(int, const char **, const char *); | |
320 | int option; | |
321 | }; | |
322 | ||
f172f334 | 323 | static int run_builtin(struct cmd_struct *p, int argc, const char **argv) |
47d0b4ff | 324 | { |
99caeed0 | 325 | int status, help; |
0f157315 | 326 | struct stat st; |
47d0b4ff LT |
327 | const char *prefix; |
328 | ||
329 | prefix = NULL; | |
99caeed0 JN |
330 | help = argc == 2 && !strcmp(argv[1], "-h"); |
331 | if (!help) { | |
332 | if (p->option & RUN_SETUP) | |
333 | prefix = setup_git_directory(); | |
27bd38d4 | 334 | else if (p->option & RUN_SETUP_GENTLY) { |
ee38dfb8 NTND |
335 | int nongit_ok; |
336 | prefix = setup_git_directory_gently(&nongit_ok); | |
337 | } | |
99caeed0 | 338 | |
ee38dfb8 | 339 | if (use_pager == -1 && p->option & (RUN_SETUP | RUN_SETUP_GENTLY)) |
99caeed0 JN |
340 | use_pager = check_pager_config(p->cmd); |
341 | if (use_pager == -1 && p->option & USE_PAGER) | |
342 | use_pager = 1; | |
a9ca8a85 NTND |
343 | |
344 | if ((p->option & (RUN_SETUP | RUN_SETUP_GENTLY)) && | |
345 | startup_info->have_repository) /* get_git_dir() may set up repo, avoid that */ | |
346 | trace_repo_setup(prefix); | |
99caeed0 | 347 | } |
4e10738a JK |
348 | commit_pager_choice(); |
349 | ||
99caeed0 | 350 | if (!help && p->option & NEED_WORK_TREE) |
59f0f2f3 MH |
351 | setup_work_tree(); |
352 | ||
b319ce4c | 353 | trace_argv_printf(argv, "trace: built-in: git"); |
47d0b4ff | 354 | |
0f157315 LT |
355 | status = p->fn(argc, argv, prefix); |
356 | if (status) | |
47e3de0e | 357 | return status; |
0f157315 LT |
358 | |
359 | /* Somebody closed stdout? */ | |
360 | if (fstat(fileno(stdout), &st)) | |
361 | return 0; | |
362 | /* Ignore write errors for pipes and sockets.. */ | |
363 | if (S_ISFIFO(st.st_mode) || S_ISSOCK(st.st_mode)) | |
364 | return 0; | |
365 | ||
366 | /* Check for ENOSPC and EIO errors.. */ | |
0227f988 | 367 | if (fflush(stdout)) |
d824cbba | 368 | die_errno("write failure on standard output"); |
0227f988 LT |
369 | if (ferror(stdout)) |
370 | die("unknown write failure on standard output"); | |
371 | if (fclose(stdout)) | |
d824cbba | 372 | die_errno("close failed on standard output"); |
0f157315 | 373 | return 0; |
47d0b4ff LT |
374 | } |
375 | ||
c6127fa3 SS |
376 | static struct cmd_struct commands[] = { |
377 | { "add", cmd_add, RUN_SETUP | NEED_WORK_TREE }, | |
378 | { "annotate", cmd_annotate, RUN_SETUP }, | |
379 | { "apply", cmd_apply, RUN_SETUP_GENTLY }, | |
380 | { "archive", cmd_archive }, | |
381 | { "bisect--helper", cmd_bisect__helper, RUN_SETUP }, | |
382 | { "blame", cmd_blame, RUN_SETUP }, | |
383 | { "branch", cmd_branch, RUN_SETUP }, | |
384 | { "bundle", cmd_bundle, RUN_SETUP_GENTLY }, | |
385 | { "cat-file", cmd_cat_file, RUN_SETUP }, | |
386 | { "check-attr", cmd_check_attr, RUN_SETUP }, | |
387 | { "check-ignore", cmd_check_ignore, RUN_SETUP | NEED_WORK_TREE }, | |
388 | { "check-mailmap", cmd_check_mailmap, RUN_SETUP }, | |
389 | { "check-ref-format", cmd_check_ref_format }, | |
0ca560cb | 390 | { "checkout", cmd_checkout, RUN_SETUP | NEED_WORK_TREE }, |
c6127fa3 SS |
391 | { "checkout-index", cmd_checkout_index, |
392 | RUN_SETUP | NEED_WORK_TREE}, | |
393 | { "cherry", cmd_cherry, RUN_SETUP }, | |
394 | { "cherry-pick", cmd_cherry_pick, RUN_SETUP | NEED_WORK_TREE }, | |
395 | { "clean", cmd_clean, RUN_SETUP | NEED_WORK_TREE }, | |
86d26f24 | 396 | { "clone", cmd_clone }, |
c6127fa3 SS |
397 | { "column", cmd_column, RUN_SETUP_GENTLY }, |
398 | { "commit", cmd_commit, RUN_SETUP | NEED_WORK_TREE }, | |
399 | { "commit-tree", cmd_commit_tree, RUN_SETUP }, | |
400 | { "config", cmd_config, RUN_SETUP_GENTLY }, | |
401 | { "count-objects", cmd_count_objects, RUN_SETUP }, | |
402 | { "credential", cmd_credential, RUN_SETUP_GENTLY }, | |
403 | { "describe", cmd_describe, RUN_SETUP }, | |
404 | { "diff", cmd_diff }, | |
405 | { "diff-files", cmd_diff_files, RUN_SETUP | NEED_WORK_TREE }, | |
406 | { "diff-index", cmd_diff_index, RUN_SETUP }, | |
407 | { "diff-tree", cmd_diff_tree, RUN_SETUP }, | |
408 | { "fast-export", cmd_fast_export, RUN_SETUP }, | |
409 | { "fetch", cmd_fetch, RUN_SETUP }, | |
410 | { "fetch-pack", cmd_fetch_pack, RUN_SETUP }, | |
411 | { "fmt-merge-msg", cmd_fmt_merge_msg, RUN_SETUP }, | |
412 | { "for-each-ref", cmd_for_each_ref, RUN_SETUP }, | |
413 | { "format-patch", cmd_format_patch, RUN_SETUP }, | |
414 | { "fsck", cmd_fsck, RUN_SETUP }, | |
415 | { "fsck-objects", cmd_fsck, RUN_SETUP }, | |
416 | { "gc", cmd_gc, RUN_SETUP }, | |
417 | { "get-tar-commit-id", cmd_get_tar_commit_id }, | |
418 | { "grep", cmd_grep, RUN_SETUP_GENTLY }, | |
419 | { "hash-object", cmd_hash_object }, | |
420 | { "help", cmd_help }, | |
421 | { "index-pack", cmd_index_pack, RUN_SETUP_GENTLY }, | |
86d26f24 NTND |
422 | { "init", cmd_init_db }, |
423 | { "init-db", cmd_init_db }, | |
6634f054 | 424 | { "interpret-trailers", cmd_interpret_trailers, RUN_SETUP }, |
c6127fa3 SS |
425 | { "log", cmd_log, RUN_SETUP }, |
426 | { "ls-files", cmd_ls_files, RUN_SETUP }, | |
427 | { "ls-remote", cmd_ls_remote, RUN_SETUP_GENTLY }, | |
428 | { "ls-tree", cmd_ls_tree, RUN_SETUP }, | |
429 | { "mailinfo", cmd_mailinfo }, | |
430 | { "mailsplit", cmd_mailsplit }, | |
431 | { "merge", cmd_merge, RUN_SETUP | NEED_WORK_TREE }, | |
432 | { "merge-base", cmd_merge_base, RUN_SETUP }, | |
433 | { "merge-file", cmd_merge_file, RUN_SETUP_GENTLY }, | |
434 | { "merge-index", cmd_merge_index, RUN_SETUP }, | |
435 | { "merge-ours", cmd_merge_ours, RUN_SETUP }, | |
436 | { "merge-recursive", cmd_merge_recursive, RUN_SETUP | NEED_WORK_TREE }, | |
437 | { "merge-recursive-ours", cmd_merge_recursive, RUN_SETUP | NEED_WORK_TREE }, | |
438 | { "merge-recursive-theirs", cmd_merge_recursive, RUN_SETUP | NEED_WORK_TREE }, | |
439 | { "merge-subtree", cmd_merge_recursive, RUN_SETUP | NEED_WORK_TREE }, | |
440 | { "merge-tree", cmd_merge_tree, RUN_SETUP }, | |
441 | { "mktag", cmd_mktag, RUN_SETUP }, | |
442 | { "mktree", cmd_mktree, RUN_SETUP }, | |
443 | { "mv", cmd_mv, RUN_SETUP | NEED_WORK_TREE }, | |
444 | { "name-rev", cmd_name_rev, RUN_SETUP }, | |
445 | { "notes", cmd_notes, RUN_SETUP }, | |
446 | { "pack-objects", cmd_pack_objects, RUN_SETUP }, | |
447 | { "pack-redundant", cmd_pack_redundant, RUN_SETUP }, | |
448 | { "pack-refs", cmd_pack_refs, RUN_SETUP }, | |
449 | { "patch-id", cmd_patch_id }, | |
450 | { "pickaxe", cmd_blame, RUN_SETUP }, | |
451 | { "prune", cmd_prune, RUN_SETUP }, | |
452 | { "prune-packed", cmd_prune_packed, RUN_SETUP }, | |
453 | { "push", cmd_push, RUN_SETUP }, | |
454 | { "read-tree", cmd_read_tree, RUN_SETUP }, | |
455 | { "receive-pack", cmd_receive_pack }, | |
456 | { "reflog", cmd_reflog, RUN_SETUP }, | |
457 | { "remote", cmd_remote, RUN_SETUP }, | |
458 | { "remote-ext", cmd_remote_ext }, | |
459 | { "remote-fd", cmd_remote_fd }, | |
460 | { "repack", cmd_repack, RUN_SETUP }, | |
461 | { "replace", cmd_replace, RUN_SETUP }, | |
462 | { "rerere", cmd_rerere, RUN_SETUP }, | |
463 | { "reset", cmd_reset, RUN_SETUP }, | |
464 | { "rev-list", cmd_rev_list, RUN_SETUP }, | |
465 | { "rev-parse", cmd_rev_parse }, | |
466 | { "revert", cmd_revert, RUN_SETUP | NEED_WORK_TREE }, | |
467 | { "rm", cmd_rm, RUN_SETUP }, | |
468 | { "send-pack", cmd_send_pack, RUN_SETUP }, | |
469 | { "shortlog", cmd_shortlog, RUN_SETUP_GENTLY | USE_PAGER }, | |
470 | { "show", cmd_show, RUN_SETUP }, | |
471 | { "show-branch", cmd_show_branch, RUN_SETUP }, | |
472 | { "show-ref", cmd_show_ref, RUN_SETUP }, | |
473 | { "stage", cmd_add, RUN_SETUP | NEED_WORK_TREE }, | |
474 | { "status", cmd_status, RUN_SETUP | NEED_WORK_TREE }, | |
475 | { "stripspace", cmd_stripspace }, | |
476 | { "symbolic-ref", cmd_symbolic_ref, RUN_SETUP }, | |
477 | { "tag", cmd_tag, RUN_SETUP }, | |
478 | { "unpack-file", cmd_unpack_file, RUN_SETUP }, | |
479 | { "unpack-objects", cmd_unpack_objects, RUN_SETUP }, | |
480 | { "update-index", cmd_update_index, RUN_SETUP }, | |
481 | { "update-ref", cmd_update_ref, RUN_SETUP }, | |
482 | { "update-server-info", cmd_update_server_info, RUN_SETUP }, | |
483 | { "upload-archive", cmd_upload_archive }, | |
484 | { "upload-archive--writer", cmd_upload_archive_writer }, | |
485 | { "var", cmd_var, RUN_SETUP_GENTLY }, | |
d07b00b7 | 486 | { "verify-commit", cmd_verify_commit, RUN_SETUP }, |
c6127fa3 SS |
487 | { "verify-pack", cmd_verify_pack }, |
488 | { "verify-tag", cmd_verify_tag, RUN_SETUP }, | |
489 | { "version", cmd_version }, | |
490 | { "whatchanged", cmd_whatchanged, RUN_SETUP }, | |
df0b6cfb | 491 | { "worktree", cmd_worktree, RUN_SETUP }, |
c6127fa3 SS |
492 | { "write-tree", cmd_write_tree, RUN_SETUP }, |
493 | }; | |
494 | ||
c4f901d1 | 495 | static struct cmd_struct *get_builtin(const char *s) |
c6127fa3 SS |
496 | { |
497 | int i; | |
498 | for (i = 0; i < ARRAY_SIZE(commands); i++) { | |
c4f901d1 | 499 | struct cmd_struct *p = commands + i; |
c6127fa3 | 500 | if (!strcmp(s, p->cmd)) |
c4f901d1 | 501 | return p; |
c6127fa3 | 502 | } |
c4f901d1 SV |
503 | return NULL; |
504 | } | |
505 | ||
506 | int is_builtin(const char *s) | |
507 | { | |
508 | return !!get_builtin(s); | |
c6127fa3 SS |
509 | } |
510 | ||
3f784a4d | 511 | static void handle_builtin(int argc, const char **argv) |
231af832 LT |
512 | { |
513 | const char *cmd = argv[0]; | |
231af832 | 514 | int i; |
23326d14 | 515 | static const char ext[] = STRIP_EXTENSION; |
c4f901d1 | 516 | struct cmd_struct *builtin; |
23326d14 JS |
517 | |
518 | if (sizeof(ext) > 1) { | |
519 | i = strlen(argv[0]) - strlen(ext); | |
520 | if (i > 0 && !strcmp(argv[0] + i, ext)) { | |
e8eec71d | 521 | char *argv0 = xstrdup(argv[0]); |
23326d14 JS |
522 | argv[0] = cmd = argv0; |
523 | argv0[i] = '\0'; | |
524 | } | |
525 | } | |
231af832 | 526 | |
1cd95087 LT |
527 | /* Turn "git cmd --help" into "git help cmd" */ |
528 | if (argc > 1 && !strcmp(argv[1], "--help")) { | |
529 | argv[1] = argv[0]; | |
530 | argv[0] = cmd = "help"; | |
531 | } | |
532 | ||
c4f901d1 | 533 | builtin = get_builtin(cmd); |
441981bc JH |
534 | if (builtin) |
535 | exit(run_builtin(builtin, argc, argv)); | |
231af832 LT |
536 | } |
537 | ||
7550be0a JH |
538 | static void execv_dashed_external(const char **argv) |
539 | { | |
f285a2d7 | 540 | struct strbuf cmd = STRBUF_INIT; |
7550be0a | 541 | const char *tmp; |
d8e96fd8 | 542 | int status; |
7550be0a | 543 | |
92058e4d JK |
544 | if (use_pager == -1) |
545 | use_pager = check_pager_config(argv[0]); | |
030149a4 JN |
546 | commit_pager_choice(); |
547 | ||
7550be0a JH |
548 | strbuf_addf(&cmd, "git-%s", argv[0]); |
549 | ||
550 | /* | |
551 | * argv[0] must be the git command, but the argv array | |
552 | * belongs to the caller, and may be reused in | |
553 | * subsequent loop iterations. Save argv[0] and | |
554 | * restore it on error. | |
555 | */ | |
556 | tmp = argv[0]; | |
557 | argv[0] = cmd.buf; | |
558 | ||
559 | trace_argv_printf(argv, "trace: exec:"); | |
560 | ||
d8e96fd8 JK |
561 | /* |
562 | * if we fail because the command is not found, it is | |
563 | * OK to return. Otherwise, we just pass along the status code. | |
564 | */ | |
10c6cddd | 565 | status = run_command_v_opt(argv, RUN_SILENT_EXEC_FAILURE | RUN_CLEAN_ON_EXIT); |
0ac77ec3 | 566 | if (status >= 0 || errno != ENOENT) |
5709e036 | 567 | exit(status); |
7550be0a JH |
568 | |
569 | argv[0] = tmp; | |
570 | ||
571 | strbuf_release(&cmd); | |
572 | } | |
573 | ||
a907e1b6 AS |
574 | static int run_argv(int *argcp, const char ***argv) |
575 | { | |
576 | int done_alias = 0; | |
577 | ||
578 | while (1) { | |
441981bc JH |
579 | /* |
580 | * If we tried alias and futzed with our environment, | |
581 | * it no longer is safe to invoke builtins directly in | |
582 | * general. We have to spawn them as dashed externals. | |
583 | * | |
584 | * NEEDSWORK: if we can figure out cases | |
585 | * where it is safe to do, we can avoid spawning a new | |
586 | * process. | |
587 | */ | |
588 | if (!done_alias) | |
589 | handle_builtin(*argcp, *argv); | |
a907e1b6 AS |
590 | |
591 | /* .. then try the external ones */ | |
592 | execv_dashed_external(*argv); | |
593 | ||
594 | /* It could be an alias -- this works around the insanity | |
595 | * of overriding "git log" with "git show" by having | |
596 | * alias.log = show | |
597 | */ | |
c0562611 NTND |
598 | if (done_alias) |
599 | break; | |
c0562611 | 600 | if (!handle_alias(argcp, argv)) |
a907e1b6 AS |
601 | break; |
602 | done_alias = 1; | |
603 | } | |
604 | ||
605 | return done_alias; | |
606 | } | |
607 | ||
7559a1be PR |
608 | /* |
609 | * Many parts of Git have subprograms communicate via pipe, expect the | |
610 | * upstream of a pipe to die with SIGPIPE when the downstream of a | |
611 | * pipe does not need to read all that is written. Some third-party | |
612 | * programs that ignore or block SIGPIPE for their own reason forget | |
613 | * to restore SIGPIPE handling to the default before spawning Git and | |
614 | * break this carefully orchestrated machinery. | |
615 | * | |
616 | * Restore the way SIGPIPE is handled to default, which is what we | |
617 | * expect. | |
618 | */ | |
619 | static void restore_sigpipe_to_default(void) | |
620 | { | |
621 | sigset_t unblock; | |
622 | ||
623 | sigemptyset(&unblock); | |
624 | sigaddset(&unblock, SIGPIPE); | |
625 | sigprocmask(SIG_UNBLOCK, &unblock, NULL); | |
626 | signal(SIGPIPE, SIG_DFL); | |
627 | } | |
7550be0a | 628 | |
84d32bf7 | 629 | int main(int argc, char **av) |
8e49d503 | 630 | { |
84d32bf7 | 631 | const char **argv = (const char **) av; |
4dd47c3b | 632 | const char *cmd; |
8fa7975b | 633 | int done_help = 0; |
231af832 | 634 | |
e37c1329 NTND |
635 | startup_info = &git_startup_info; |
636 | ||
2cd72b0b SP |
637 | cmd = git_extract_argv0_path(argv[0]); |
638 | if (!cmd) | |
4dd47c3b | 639 | cmd = "git-help"; |
8e49d503 | 640 | |
a11c3964 TR |
641 | /* |
642 | * Always open file descriptors 0/1/2 to avoid clobbering files | |
643 | * in die(). It also avoids messing up when the pipes are dup'ed | |
644 | * onto stdin/stdout/stderr in the child processes we spawn. | |
645 | */ | |
646 | sanitize_stdfds(); | |
647 | ||
7559a1be PR |
648 | restore_sigpipe_to_default(); |
649 | ||
5e9637c6 ÆAB |
650 | git_setup_gettext(); |
651 | ||
578da039 KB |
652 | trace_command_performance(argv); |
653 | ||
231af832 LT |
654 | /* |
655 | * "git-xxxx" is the same as "git xxxx", but we obviously: | |
656 | * | |
657 | * - cannot take flags in between the "git" and the "xxxx". | |
658 | * - cannot execute it externally (since it would just do | |
659 | * the same thing over again) | |
660 | * | |
3f784a4d SS |
661 | * So we just directly call the builtin handler, and die if |
662 | * that one cannot handle it. | |
231af832 | 663 | */ |
ae021d87 | 664 | if (skip_prefix(cmd, "git-", &cmd)) { |
231af832 | 665 | argv[0] = cmd; |
3f784a4d SS |
666 | handle_builtin(argc, argv); |
667 | die("cannot handle %s as a builtin", cmd); | |
231af832 | 668 | } |
8e49d503 | 669 | |
231af832 | 670 | /* Look for flags.. */ |
6acbcb92 JS |
671 | argv++; |
672 | argc--; | |
4394efec | 673 | handle_options(&argv, &argc, NULL); |
6acbcb92 | 674 | if (argc > 0) { |
6d877803 JK |
675 | /* translate --help and --version into commands */ |
676 | skip_prefix(argv[0], "--", &argv[0]); | |
6acbcb92 | 677 | } else { |
3d7e2d85 | 678 | /* The user didn't specify a command; give them help */ |
73e25e7c | 679 | commit_pager_choice(); |
3d7e2d85 SP |
680 | printf("usage: %s\n\n", git_usage_string); |
681 | list_common_cmds_help(); | |
421a9769 | 682 | printf("\n%s\n", _(git_more_info_string)); |
3d7e2d85 | 683 | exit(1); |
97fc6c5f | 684 | } |
6acbcb92 | 685 | cmd = argv[0]; |
231af832 LT |
686 | |
687 | /* | |
511707d4 | 688 | * We use PATH to find git commands, but we prepend some higher |
3ea3c215 | 689 | * precedence paths: the "--exec-path" option, the GIT_EXEC_PATH |
511707d4 SP |
690 | * environment, and the $(gitexecdir) from the Makefile at build |
691 | * time. | |
231af832 | 692 | */ |
e1464ca7 | 693 | setup_path(); |
8e49d503 | 694 | |
a025463b | 695 | while (1) { |
8fa7975b | 696 | int was_alias = run_argv(&argc, &argv); |
a907e1b6 | 697 | if (errno != ENOENT) |
a025463b | 698 | break; |
a907e1b6 | 699 | if (was_alias) { |
f3dd015c | 700 | fprintf(stderr, "Expansion of alias '%s' failed; " |
7283bbc7 | 701 | "'%s' is not a git command\n", |
f3dd015c TT |
702 | cmd, argv[0]); |
703 | exit(1); | |
704 | } | |
a907e1b6 AS |
705 | if (!done_help) { |
706 | cmd = argv[0] = help_unknown_cmd(cmd); | |
707 | done_help = 1; | |
708 | } else | |
709 | break; | |
f3dd015c | 710 | } |
10b15b86 AR |
711 | |
712 | fprintf(stderr, "Failed to run command '%s': %s\n", | |
33ebb871 | 713 | cmd, strerror(errno)); |
8e49d503 AE |
714 | |
715 | return 1; | |
716 | } |