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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; | |
8384c139 | 57 | if (orig_env[i]) { |
c0562611 | 58 | setenv(env_names[i], orig_env[i], 1); |
8384c139 JH |
59 | free(orig_env[i]); |
60 | } else { | |
c0562611 | 61 | unsetenv(env_names[i]); |
8384c139 | 62 | } |
c0562611 NTND |
63 | } |
64 | } | |
4e10738a JK |
65 | |
66 | static void commit_pager_choice(void) { | |
67 | switch (use_pager) { | |
68 | case 0: | |
69 | setenv("GIT_PAGER", "cat", 1); | |
70 | break; | |
71 | case 1: | |
72 | setup_pager(); | |
73 | break; | |
74 | default: | |
75 | break; | |
76 | } | |
77 | } | |
78 | ||
4b25d091 | 79 | static int handle_options(const char ***argv, int *argc, int *envchanged) |
4ab243a9 | 80 | { |
73546c08 | 81 | const char **orig_argv = *argv; |
4ab243a9 JS |
82 | |
83 | while (*argc > 0) { | |
84 | const char *cmd = (*argv)[0]; | |
85 | if (cmd[0] != '-') | |
86 | break; | |
87 | ||
6acbcb92 JS |
88 | /* |
89 | * For legacy reasons, the "version" and "help" | |
90 | * commands can be written with "--" prepended | |
91 | * to make them look like flags. | |
92 | */ | |
93 | if (!strcmp(cmd, "--help") || !strcmp(cmd, "--version")) | |
94 | break; | |
95 | ||
96 | /* | |
97 | * Check remaining flags. | |
98 | */ | |
ae021d87 | 99 | if (skip_prefix(cmd, "--exec-path", &cmd)) { |
6acbcb92 | 100 | if (*cmd == '=') |
384df833 | 101 | git_set_argv_exec_path(cmd + 1); |
6acbcb92 JS |
102 | else { |
103 | puts(git_exec_path()); | |
104 | exit(0); | |
105 | } | |
89a56bfb MH |
106 | } else if (!strcmp(cmd, "--html-path")) { |
107 | puts(system_path(GIT_HTML_PATH)); | |
108 | exit(0); | |
f2dd8c37 JS |
109 | } else if (!strcmp(cmd, "--man-path")) { |
110 | puts(system_path(GIT_MAN_PATH)); | |
111 | exit(0); | |
112 | } else if (!strcmp(cmd, "--info-path")) { | |
113 | puts(system_path(GIT_INFO_PATH)); | |
114 | exit(0); | |
6acbcb92 | 115 | } else if (!strcmp(cmd, "-p") || !strcmp(cmd, "--paginate")) { |
4e10738a | 116 | use_pager = 1; |
463a849d | 117 | } else if (!strcmp(cmd, "--no-pager")) { |
4e10738a | 118 | use_pager = 0; |
463a849d MM |
119 | if (envchanged) |
120 | *envchanged = 1; | |
b0fa7ab5 | 121 | } else if (!strcmp(cmd, "--no-replace-objects")) { |
afc711b8 | 122 | check_replace_refs = 0; |
6476b38b CC |
123 | setenv(NO_REPLACE_OBJECTS_ENVIRONMENT, "1", 1); |
124 | if (envchanged) | |
125 | *envchanged = 1; | |
6acbcb92 | 126 | } else if (!strcmp(cmd, "--git-dir")) { |
c321f00d BG |
127 | if (*argc < 2) { |
128 | fprintf(stderr, "No directory given for --git-dir.\n" ); | |
129 | usage(git_usage_string); | |
130 | } | |
45b09794 | 131 | setenv(GIT_DIR_ENVIRONMENT, (*argv)[1], 1); |
4394efec ML |
132 | if (envchanged) |
133 | *envchanged = 1; | |
6acbcb92 JS |
134 | (*argv)++; |
135 | (*argc)--; | |
ae021d87 JK |
136 | } else if (skip_prefix(cmd, "--git-dir=", &cmd)) { |
137 | setenv(GIT_DIR_ENVIRONMENT, cmd, 1); | |
4394efec ML |
138 | if (envchanged) |
139 | *envchanged = 1; | |
a1bea2c1 JT |
140 | } else if (!strcmp(cmd, "--namespace")) { |
141 | if (*argc < 2) { | |
142 | fprintf(stderr, "No namespace given for --namespace.\n" ); | |
143 | usage(git_usage_string); | |
144 | } | |
145 | setenv(GIT_NAMESPACE_ENVIRONMENT, (*argv)[1], 1); | |
146 | if (envchanged) | |
147 | *envchanged = 1; | |
148 | (*argv)++; | |
149 | (*argc)--; | |
ae021d87 JK |
150 | } else if (skip_prefix(cmd, "--namespace=", &cmd)) { |
151 | setenv(GIT_NAMESPACE_ENVIRONMENT, cmd, 1); | |
a1bea2c1 JT |
152 | if (envchanged) |
153 | *envchanged = 1; | |
892c41b9 ML |
154 | } else if (!strcmp(cmd, "--work-tree")) { |
155 | if (*argc < 2) { | |
156 | fprintf(stderr, "No directory given for --work-tree.\n" ); | |
157 | usage(git_usage_string); | |
158 | } | |
159 | setenv(GIT_WORK_TREE_ENVIRONMENT, (*argv)[1], 1); | |
4394efec ML |
160 | if (envchanged) |
161 | *envchanged = 1; | |
892c41b9 ML |
162 | (*argv)++; |
163 | (*argc)--; | |
ae021d87 JK |
164 | } else if (skip_prefix(cmd, "--work-tree=", &cmd)) { |
165 | setenv(GIT_WORK_TREE_ENVIRONMENT, cmd, 1); | |
4394efec ML |
166 | if (envchanged) |
167 | *envchanged = 1; | |
6acbcb92 | 168 | } else if (!strcmp(cmd, "--bare")) { |
4d3ab44d | 169 | char *cwd = xgetcwd(); |
6adcca3f | 170 | is_bare_repository_cfg = 1; |
4d3ab44d RS |
171 | setenv(GIT_DIR_ENVIRONMENT, cwd, 0); |
172 | free(cwd); | |
2cd83d10 | 173 | setenv(GIT_IMPLICIT_WORK_TREE_ENVIRONMENT, "0", 1); |
4394efec ML |
174 | if (envchanged) |
175 | *envchanged = 1; | |
8b1fa778 AR |
176 | } else if (!strcmp(cmd, "-c")) { |
177 | if (*argc < 2) { | |
178 | fprintf(stderr, "-c expects a configuration string\n" ); | |
179 | usage(git_usage_string); | |
180 | } | |
2b64fc89 | 181 | git_config_push_parameter((*argv)[1]); |
8b1fa778 AR |
182 | (*argv)++; |
183 | (*argc)--; | |
823ab40f JK |
184 | } else if (!strcmp(cmd, "--literal-pathspecs")) { |
185 | setenv(GIT_LITERAL_PATHSPECS_ENVIRONMENT, "1", 1); | |
186 | if (envchanged) | |
187 | *envchanged = 1; | |
188 | } else if (!strcmp(cmd, "--no-literal-pathspecs")) { | |
189 | setenv(GIT_LITERAL_PATHSPECS_ENVIRONMENT, "0", 1); | |
190 | if (envchanged) | |
191 | *envchanged = 1; | |
bd30c2e4 NTND |
192 | } else if (!strcmp(cmd, "--glob-pathspecs")) { |
193 | setenv(GIT_GLOB_PATHSPECS_ENVIRONMENT, "1", 1); | |
194 | if (envchanged) | |
195 | *envchanged = 1; | |
196 | } else if (!strcmp(cmd, "--noglob-pathspecs")) { | |
197 | setenv(GIT_NOGLOB_PATHSPECS_ENVIRONMENT, "1", 1); | |
198 | if (envchanged) | |
199 | *envchanged = 1; | |
93d93537 NTND |
200 | } else if (!strcmp(cmd, "--icase-pathspecs")) { |
201 | setenv(GIT_ICASE_PATHSPECS_ENVIRONMENT, "1", 1); | |
202 | if (envchanged) | |
203 | *envchanged = 1; | |
6035d6aa NTND |
204 | } else if (!strcmp(cmd, "--shallow-file")) { |
205 | (*argv)++; | |
206 | (*argc)--; | |
069c0532 | 207 | set_alternate_shallow_file((*argv)[0], 1); |
6035d6aa NTND |
208 | if (envchanged) |
209 | *envchanged = 1; | |
44e1e4d6 NR |
210 | } else if (!strcmp(cmd, "-C")) { |
211 | if (*argc < 2) { | |
212 | fprintf(stderr, "No directory given for -C.\n" ); | |
213 | usage(git_usage_string); | |
214 | } | |
6a536e20 KN |
215 | if ((*argv)[1][0]) { |
216 | if (chdir((*argv)[1])) | |
217 | die_errno("Cannot change to '%s'", (*argv)[1]); | |
218 | if (envchanged) | |
219 | *envchanged = 1; | |
220 | } | |
44e1e4d6 NR |
221 | (*argv)++; |
222 | (*argc)--; | |
6acbcb92 JS |
223 | } else { |
224 | fprintf(stderr, "Unknown option: %s\n", cmd); | |
822a7d50 | 225 | usage(git_usage_string); |
6acbcb92 | 226 | } |
4ab243a9 JS |
227 | |
228 | (*argv)++; | |
229 | (*argc)--; | |
4ab243a9 | 230 | } |
73546c08 | 231 | return (*argv) - orig_argv; |
4ab243a9 JS |
232 | } |
233 | ||
2b11e317 JS |
234 | static int handle_alias(int *argcp, const char ***argv) |
235 | { | |
af05d679 | 236 | int envchanged = 0, ret = 0, saved_errno = errno; |
0347a8c7 | 237 | int count, option_count; |
4b25d091 | 238 | const char **new_argv; |
94351118 JK |
239 | const char *alias_command; |
240 | char *alias_string; | |
e85dc0a3 | 241 | int unused_nongit; |
2b11e317 | 242 | |
0d5466d2 | 243 | save_env_before_alias(); |
86d26f24 | 244 | setup_git_directory_gently(&unused_nongit); |
0347a8c7 ML |
245 | |
246 | alias_command = (*argv)[0]; | |
94351118 | 247 | alias_string = alias_lookup(alias_command); |
0347a8c7 | 248 | if (alias_string) { |
dfd42a3c | 249 | if (alias_string[0] == '!') { |
850d2fec | 250 | struct child_process child = CHILD_PROCESS_INIT; |
7f51f8bc | 251 | |
030149a4 | 252 | commit_pager_choice(); |
57ea7123 | 253 | restore_env(1); |
7f51f8bc | 254 | |
850d2fec JK |
255 | child.use_shell = 1; |
256 | argv_array_push(&child.args, alias_string + 1); | |
257 | argv_array_pushv(&child.args, (*argv) + 1); | |
7f51f8bc | 258 | |
850d2fec | 259 | ret = run_command(&child); |
7f51f8bc EFL |
260 | if (ret >= 0) /* normal exit */ |
261 | exit(ret); | |
262 | ||
263 | die_errno("While expanding alias '%s': '%s'", | |
264 | alias_command, alias_string + 1); | |
dfd42a3c | 265 | } |
0347a8c7 | 266 | count = split_cmdline(alias_string, &new_argv); |
dc4179f9 | 267 | if (count < 0) |
ad9ac6db GB |
268 | die("Bad alias.%s string: %s", alias_command, |
269 | split_cmdline_strerror(count)); | |
4394efec ML |
270 | option_count = handle_options(&new_argv, &count, &envchanged); |
271 | if (envchanged) | |
272 | die("alias '%s' changes environment variables\n" | |
273 | "You can use '!git' in the alias to do this.", | |
274 | alias_command); | |
0347a8c7 ML |
275 | memmove(new_argv - option_count, new_argv, |
276 | count * sizeof(char *)); | |
277 | new_argv -= option_count; | |
278 | ||
279 | if (count < 1) | |
280 | die("empty alias for %s", alias_command); | |
281 | ||
282 | if (!strcmp(alias_command, new_argv[0])) | |
283 | die("recursive alias: %s", alias_command); | |
284 | ||
b319ce4c | 285 | trace_argv_printf(new_argv, |
6ce4e61f CC |
286 | "trace: alias expansion: %s =>", |
287 | alias_command); | |
575ba9d6 | 288 | |
2756ca43 | 289 | REALLOC_ARRAY(new_argv, count + *argcp); |
0347a8c7 | 290 | /* insert after command name */ |
4b25d091 | 291 | memcpy(new_argv + count, *argv + 1, sizeof(char *) * *argcp); |
2b11e317 | 292 | |
0347a8c7 ML |
293 | *argv = new_argv; |
294 | *argcp += count - 1; | |
2b11e317 | 295 | |
0347a8c7 | 296 | ret = 1; |
2b11e317 JS |
297 | } |
298 | ||
57ea7123 | 299 | restore_env(0); |
2b11e317 | 300 | |
47e5c0ca JS |
301 | errno = saved_errno; |
302 | ||
2b11e317 JS |
303 | return ret; |
304 | } | |
305 | ||
ee38dfb8 NTND |
306 | #define RUN_SETUP (1<<0) |
307 | #define RUN_SETUP_GENTLY (1<<1) | |
308 | #define USE_PAGER (1<<2) | |
7eff28a9 SP |
309 | /* |
310 | * require working tree to be present -- anything uses this needs | |
311 | * RUN_SETUP for reading from the configuration file. | |
312 | */ | |
ee38dfb8 | 313 | #define NEED_WORK_TREE (1<<3) |
a633fca0 | 314 | |
47d0b4ff LT |
315 | struct cmd_struct { |
316 | const char *cmd; | |
317 | int (*fn)(int, const char **, const char *); | |
318 | int option; | |
319 | }; | |
320 | ||
f172f334 | 321 | static int run_builtin(struct cmd_struct *p, int argc, const char **argv) |
47d0b4ff | 322 | { |
99caeed0 | 323 | int status, help; |
0f157315 | 324 | struct stat st; |
47d0b4ff LT |
325 | const char *prefix; |
326 | ||
327 | prefix = NULL; | |
99caeed0 JN |
328 | help = argc == 2 && !strcmp(argv[1], "-h"); |
329 | if (!help) { | |
330 | if (p->option & RUN_SETUP) | |
331 | prefix = setup_git_directory(); | |
27bd38d4 | 332 | else if (p->option & RUN_SETUP_GENTLY) { |
ee38dfb8 NTND |
333 | int nongit_ok; |
334 | prefix = setup_git_directory_gently(&nongit_ok); | |
335 | } | |
99caeed0 | 336 | |
ee38dfb8 | 337 | if (use_pager == -1 && p->option & (RUN_SETUP | RUN_SETUP_GENTLY)) |
99caeed0 JN |
338 | use_pager = check_pager_config(p->cmd); |
339 | if (use_pager == -1 && p->option & USE_PAGER) | |
340 | use_pager = 1; | |
a9ca8a85 NTND |
341 | |
342 | if ((p->option & (RUN_SETUP | RUN_SETUP_GENTLY)) && | |
343 | startup_info->have_repository) /* get_git_dir() may set up repo, avoid that */ | |
344 | trace_repo_setup(prefix); | |
99caeed0 | 345 | } |
4e10738a JK |
346 | commit_pager_choice(); |
347 | ||
99caeed0 | 348 | if (!help && p->option & NEED_WORK_TREE) |
59f0f2f3 MH |
349 | setup_work_tree(); |
350 | ||
b319ce4c | 351 | trace_argv_printf(argv, "trace: built-in: git"); |
47d0b4ff | 352 | |
0f157315 LT |
353 | status = p->fn(argc, argv, prefix); |
354 | if (status) | |
47e3de0e | 355 | return status; |
0f157315 LT |
356 | |
357 | /* Somebody closed stdout? */ | |
358 | if (fstat(fileno(stdout), &st)) | |
359 | return 0; | |
360 | /* Ignore write errors for pipes and sockets.. */ | |
361 | if (S_ISFIFO(st.st_mode) || S_ISSOCK(st.st_mode)) | |
362 | return 0; | |
363 | ||
364 | /* Check for ENOSPC and EIO errors.. */ | |
0227f988 | 365 | if (fflush(stdout)) |
d824cbba | 366 | die_errno("write failure on standard output"); |
0227f988 LT |
367 | if (ferror(stdout)) |
368 | die("unknown write failure on standard output"); | |
369 | if (fclose(stdout)) | |
d824cbba | 370 | die_errno("close failed on standard output"); |
0f157315 | 371 | return 0; |
47d0b4ff LT |
372 | } |
373 | ||
c6127fa3 SS |
374 | static struct cmd_struct commands[] = { |
375 | { "add", cmd_add, RUN_SETUP | NEED_WORK_TREE }, | |
783d7e86 | 376 | { "am", cmd_am, RUN_SETUP | NEED_WORK_TREE }, |
c6127fa3 SS |
377 | { "annotate", cmd_annotate, RUN_SETUP }, |
378 | { "apply", cmd_apply, RUN_SETUP_GENTLY }, | |
379 | { "archive", cmd_archive }, | |
380 | { "bisect--helper", cmd_bisect__helper, RUN_SETUP }, | |
381 | { "blame", cmd_blame, RUN_SETUP }, | |
382 | { "branch", cmd_branch, RUN_SETUP }, | |
383 | { "bundle", cmd_bundle, RUN_SETUP_GENTLY }, | |
384 | { "cat-file", cmd_cat_file, RUN_SETUP }, | |
385 | { "check-attr", cmd_check_attr, RUN_SETUP }, | |
386 | { "check-ignore", cmd_check_ignore, RUN_SETUP | NEED_WORK_TREE }, | |
387 | { "check-mailmap", cmd_check_mailmap, RUN_SETUP }, | |
388 | { "check-ref-format", cmd_check_ref_format }, | |
0ca560cb | 389 | { "checkout", cmd_checkout, RUN_SETUP | NEED_WORK_TREE }, |
c6127fa3 SS |
390 | { "checkout-index", cmd_checkout_index, |
391 | RUN_SETUP | NEED_WORK_TREE}, | |
392 | { "cherry", cmd_cherry, RUN_SETUP }, | |
393 | { "cherry-pick", cmd_cherry_pick, RUN_SETUP | NEED_WORK_TREE }, | |
394 | { "clean", cmd_clean, RUN_SETUP | NEED_WORK_TREE }, | |
86d26f24 | 395 | { "clone", cmd_clone }, |
c6127fa3 SS |
396 | { "column", cmd_column, RUN_SETUP_GENTLY }, |
397 | { "commit", cmd_commit, RUN_SETUP | NEED_WORK_TREE }, | |
398 | { "commit-tree", cmd_commit_tree, RUN_SETUP }, | |
399 | { "config", cmd_config, RUN_SETUP_GENTLY }, | |
400 | { "count-objects", cmd_count_objects, RUN_SETUP }, | |
401 | { "credential", cmd_credential, RUN_SETUP_GENTLY }, | |
402 | { "describe", cmd_describe, RUN_SETUP }, | |
403 | { "diff", cmd_diff }, | |
404 | { "diff-files", cmd_diff_files, RUN_SETUP | NEED_WORK_TREE }, | |
405 | { "diff-index", cmd_diff_index, RUN_SETUP }, | |
406 | { "diff-tree", cmd_diff_tree, RUN_SETUP }, | |
407 | { "fast-export", cmd_fast_export, RUN_SETUP }, | |
408 | { "fetch", cmd_fetch, RUN_SETUP }, | |
409 | { "fetch-pack", cmd_fetch_pack, RUN_SETUP }, | |
410 | { "fmt-merge-msg", cmd_fmt_merge_msg, RUN_SETUP }, | |
411 | { "for-each-ref", cmd_for_each_ref, RUN_SETUP }, | |
412 | { "format-patch", cmd_format_patch, RUN_SETUP }, | |
413 | { "fsck", cmd_fsck, RUN_SETUP }, | |
414 | { "fsck-objects", cmd_fsck, RUN_SETUP }, | |
415 | { "gc", cmd_gc, RUN_SETUP }, | |
416 | { "get-tar-commit-id", cmd_get_tar_commit_id }, | |
417 | { "grep", cmd_grep, RUN_SETUP_GENTLY }, | |
418 | { "hash-object", cmd_hash_object }, | |
419 | { "help", cmd_help }, | |
420 | { "index-pack", cmd_index_pack, RUN_SETUP_GENTLY }, | |
86d26f24 NTND |
421 | { "init", cmd_init_db }, |
422 | { "init-db", cmd_init_db }, | |
cbd9fc23 | 423 | { "interpret-trailers", cmd_interpret_trailers, RUN_SETUP_GENTLY }, |
c6127fa3 SS |
424 | { "log", cmd_log, RUN_SETUP }, |
425 | { "ls-files", cmd_ls_files, RUN_SETUP }, | |
426 | { "ls-remote", cmd_ls_remote, RUN_SETUP_GENTLY }, | |
427 | { "ls-tree", cmd_ls_tree, RUN_SETUP }, | |
428 | { "mailinfo", cmd_mailinfo }, | |
429 | { "mailsplit", cmd_mailsplit }, | |
430 | { "merge", cmd_merge, RUN_SETUP | NEED_WORK_TREE }, | |
431 | { "merge-base", cmd_merge_base, RUN_SETUP }, | |
432 | { "merge-file", cmd_merge_file, RUN_SETUP_GENTLY }, | |
433 | { "merge-index", cmd_merge_index, RUN_SETUP }, | |
434 | { "merge-ours", cmd_merge_ours, RUN_SETUP }, | |
435 | { "merge-recursive", cmd_merge_recursive, RUN_SETUP | NEED_WORK_TREE }, | |
436 | { "merge-recursive-ours", cmd_merge_recursive, RUN_SETUP | NEED_WORK_TREE }, | |
437 | { "merge-recursive-theirs", cmd_merge_recursive, RUN_SETUP | NEED_WORK_TREE }, | |
438 | { "merge-subtree", cmd_merge_recursive, RUN_SETUP | NEED_WORK_TREE }, | |
439 | { "merge-tree", cmd_merge_tree, RUN_SETUP }, | |
440 | { "mktag", cmd_mktag, RUN_SETUP }, | |
441 | { "mktree", cmd_mktree, RUN_SETUP }, | |
442 | { "mv", cmd_mv, RUN_SETUP | NEED_WORK_TREE }, | |
443 | { "name-rev", cmd_name_rev, RUN_SETUP }, | |
444 | { "notes", cmd_notes, RUN_SETUP }, | |
445 | { "pack-objects", cmd_pack_objects, RUN_SETUP }, | |
446 | { "pack-redundant", cmd_pack_redundant, RUN_SETUP }, | |
447 | { "pack-refs", cmd_pack_refs, RUN_SETUP }, | |
448 | { "patch-id", cmd_patch_id }, | |
449 | { "pickaxe", cmd_blame, RUN_SETUP }, | |
450 | { "prune", cmd_prune, RUN_SETUP }, | |
451 | { "prune-packed", cmd_prune_packed, RUN_SETUP }, | |
1e1ea69f | 452 | { "pull", cmd_pull, RUN_SETUP | NEED_WORK_TREE }, |
c6127fa3 SS |
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 }, | |
74703a1e | 476 | { "submodule--helper", cmd_submodule__helper, RUN_SETUP }, |
c6127fa3 SS |
477 | { "symbolic-ref", cmd_symbolic_ref, RUN_SETUP }, |
478 | { "tag", cmd_tag, RUN_SETUP }, | |
479 | { "unpack-file", cmd_unpack_file, RUN_SETUP }, | |
480 | { "unpack-objects", cmd_unpack_objects, RUN_SETUP }, | |
481 | { "update-index", cmd_update_index, RUN_SETUP }, | |
482 | { "update-ref", cmd_update_ref, RUN_SETUP }, | |
483 | { "update-server-info", cmd_update_server_info, RUN_SETUP }, | |
484 | { "upload-archive", cmd_upload_archive }, | |
485 | { "upload-archive--writer", cmd_upload_archive_writer }, | |
486 | { "var", cmd_var, RUN_SETUP_GENTLY }, | |
d07b00b7 | 487 | { "verify-commit", cmd_verify_commit, RUN_SETUP }, |
c6127fa3 SS |
488 | { "verify-pack", cmd_verify_pack }, |
489 | { "verify-tag", cmd_verify_tag, RUN_SETUP }, | |
490 | { "version", cmd_version }, | |
491 | { "whatchanged", cmd_whatchanged, RUN_SETUP }, | |
df0b6cfb | 492 | { "worktree", cmd_worktree, RUN_SETUP }, |
c6127fa3 SS |
493 | { "write-tree", cmd_write_tree, RUN_SETUP }, |
494 | }; | |
495 | ||
c4f901d1 | 496 | static struct cmd_struct *get_builtin(const char *s) |
c6127fa3 SS |
497 | { |
498 | int i; | |
499 | for (i = 0; i < ARRAY_SIZE(commands); i++) { | |
c4f901d1 | 500 | struct cmd_struct *p = commands + i; |
c6127fa3 | 501 | if (!strcmp(s, p->cmd)) |
c4f901d1 | 502 | return p; |
c6127fa3 | 503 | } |
c4f901d1 SV |
504 | return NULL; |
505 | } | |
506 | ||
507 | int is_builtin(const char *s) | |
508 | { | |
509 | return !!get_builtin(s); | |
c6127fa3 SS |
510 | } |
511 | ||
63ca1c09 AK |
512 | #ifdef STRIP_EXTENSION |
513 | static void strip_extension(const char **argv) | |
514 | { | |
515 | size_t len; | |
516 | ||
517 | if (strip_suffix(argv[0], STRIP_EXTENSION, &len)) | |
518 | argv[0] = xmemdupz(argv[0], len); | |
519 | } | |
520 | #else | |
521 | #define strip_extension(cmd) | |
522 | #endif | |
523 | ||
3f784a4d | 524 | static void handle_builtin(int argc, const char **argv) |
231af832 | 525 | { |
63ca1c09 | 526 | const char *cmd; |
c4f901d1 | 527 | struct cmd_struct *builtin; |
23326d14 | 528 | |
63ca1c09 AK |
529 | strip_extension(argv); |
530 | cmd = argv[0]; | |
231af832 | 531 | |
1cd95087 LT |
532 | /* Turn "git cmd --help" into "git help cmd" */ |
533 | if (argc > 1 && !strcmp(argv[1], "--help")) { | |
534 | argv[1] = argv[0]; | |
535 | argv[0] = cmd = "help"; | |
536 | } | |
537 | ||
c4f901d1 | 538 | builtin = get_builtin(cmd); |
441981bc JH |
539 | if (builtin) |
540 | exit(run_builtin(builtin, argc, argv)); | |
231af832 LT |
541 | } |
542 | ||
7550be0a JH |
543 | static void execv_dashed_external(const char **argv) |
544 | { | |
f285a2d7 | 545 | struct strbuf cmd = STRBUF_INIT; |
7550be0a | 546 | const char *tmp; |
d8e96fd8 | 547 | int status; |
7550be0a | 548 | |
92058e4d JK |
549 | if (use_pager == -1) |
550 | use_pager = check_pager_config(argv[0]); | |
030149a4 JN |
551 | commit_pager_choice(); |
552 | ||
7550be0a JH |
553 | strbuf_addf(&cmd, "git-%s", argv[0]); |
554 | ||
555 | /* | |
556 | * argv[0] must be the git command, but the argv array | |
557 | * belongs to the caller, and may be reused in | |
558 | * subsequent loop iterations. Save argv[0] and | |
559 | * restore it on error. | |
560 | */ | |
561 | tmp = argv[0]; | |
562 | argv[0] = cmd.buf; | |
563 | ||
564 | trace_argv_printf(argv, "trace: exec:"); | |
565 | ||
d8e96fd8 JK |
566 | /* |
567 | * if we fail because the command is not found, it is | |
568 | * OK to return. Otherwise, we just pass along the status code. | |
569 | */ | |
10c6cddd | 570 | status = run_command_v_opt(argv, RUN_SILENT_EXEC_FAILURE | RUN_CLEAN_ON_EXIT); |
0ac77ec3 | 571 | if (status >= 0 || errno != ENOENT) |
5709e036 | 572 | exit(status); |
7550be0a JH |
573 | |
574 | argv[0] = tmp; | |
575 | ||
576 | strbuf_release(&cmd); | |
577 | } | |
578 | ||
a907e1b6 AS |
579 | static int run_argv(int *argcp, const char ***argv) |
580 | { | |
581 | int done_alias = 0; | |
582 | ||
583 | while (1) { | |
441981bc JH |
584 | /* |
585 | * If we tried alias and futzed with our environment, | |
586 | * it no longer is safe to invoke builtins directly in | |
587 | * general. We have to spawn them as dashed externals. | |
588 | * | |
589 | * NEEDSWORK: if we can figure out cases | |
590 | * where it is safe to do, we can avoid spawning a new | |
591 | * process. | |
592 | */ | |
593 | if (!done_alias) | |
594 | handle_builtin(*argcp, *argv); | |
a907e1b6 AS |
595 | |
596 | /* .. then try the external ones */ | |
597 | execv_dashed_external(*argv); | |
598 | ||
599 | /* It could be an alias -- this works around the insanity | |
600 | * of overriding "git log" with "git show" by having | |
601 | * alias.log = show | |
602 | */ | |
c0562611 NTND |
603 | if (done_alias) |
604 | break; | |
c0562611 | 605 | if (!handle_alias(argcp, argv)) |
a907e1b6 AS |
606 | break; |
607 | done_alias = 1; | |
608 | } | |
609 | ||
610 | return done_alias; | |
611 | } | |
612 | ||
7559a1be PR |
613 | /* |
614 | * Many parts of Git have subprograms communicate via pipe, expect the | |
615 | * upstream of a pipe to die with SIGPIPE when the downstream of a | |
616 | * pipe does not need to read all that is written. Some third-party | |
617 | * programs that ignore or block SIGPIPE for their own reason forget | |
618 | * to restore SIGPIPE handling to the default before spawning Git and | |
619 | * break this carefully orchestrated machinery. | |
620 | * | |
621 | * Restore the way SIGPIPE is handled to default, which is what we | |
622 | * expect. | |
623 | */ | |
624 | static void restore_sigpipe_to_default(void) | |
625 | { | |
626 | sigset_t unblock; | |
627 | ||
628 | sigemptyset(&unblock); | |
629 | sigaddset(&unblock, SIGPIPE); | |
630 | sigprocmask(SIG_UNBLOCK, &unblock, NULL); | |
631 | signal(SIGPIPE, SIG_DFL); | |
632 | } | |
7550be0a | 633 | |
84d32bf7 | 634 | int main(int argc, char **av) |
8e49d503 | 635 | { |
84d32bf7 | 636 | const char **argv = (const char **) av; |
4dd47c3b | 637 | const char *cmd; |
8fa7975b | 638 | int done_help = 0; |
231af832 | 639 | |
e37c1329 NTND |
640 | startup_info = &git_startup_info; |
641 | ||
2cd72b0b SP |
642 | cmd = git_extract_argv0_path(argv[0]); |
643 | if (!cmd) | |
4dd47c3b | 644 | cmd = "git-help"; |
8e49d503 | 645 | |
a11c3964 TR |
646 | /* |
647 | * Always open file descriptors 0/1/2 to avoid clobbering files | |
648 | * in die(). It also avoids messing up when the pipes are dup'ed | |
649 | * onto stdin/stdout/stderr in the child processes we spawn. | |
650 | */ | |
651 | sanitize_stdfds(); | |
652 | ||
7559a1be PR |
653 | restore_sigpipe_to_default(); |
654 | ||
5e9637c6 ÆAB |
655 | git_setup_gettext(); |
656 | ||
578da039 KB |
657 | trace_command_performance(argv); |
658 | ||
231af832 LT |
659 | /* |
660 | * "git-xxxx" is the same as "git xxxx", but we obviously: | |
661 | * | |
662 | * - cannot take flags in between the "git" and the "xxxx". | |
663 | * - cannot execute it externally (since it would just do | |
664 | * the same thing over again) | |
665 | * | |
3f784a4d SS |
666 | * So we just directly call the builtin handler, and die if |
667 | * that one cannot handle it. | |
231af832 | 668 | */ |
ae021d87 | 669 | if (skip_prefix(cmd, "git-", &cmd)) { |
231af832 | 670 | argv[0] = cmd; |
3f784a4d SS |
671 | handle_builtin(argc, argv); |
672 | die("cannot handle %s as a builtin", cmd); | |
231af832 | 673 | } |
8e49d503 | 674 | |
231af832 | 675 | /* Look for flags.. */ |
6acbcb92 JS |
676 | argv++; |
677 | argc--; | |
4394efec | 678 | handle_options(&argv, &argc, NULL); |
6acbcb92 | 679 | if (argc > 0) { |
6d877803 JK |
680 | /* translate --help and --version into commands */ |
681 | skip_prefix(argv[0], "--", &argv[0]); | |
6acbcb92 | 682 | } else { |
3d7e2d85 | 683 | /* The user didn't specify a command; give them help */ |
73e25e7c | 684 | commit_pager_choice(); |
3d7e2d85 SP |
685 | printf("usage: %s\n\n", git_usage_string); |
686 | list_common_cmds_help(); | |
421a9769 | 687 | printf("\n%s\n", _(git_more_info_string)); |
3d7e2d85 | 688 | exit(1); |
97fc6c5f | 689 | } |
6acbcb92 | 690 | cmd = argv[0]; |
231af832 LT |
691 | |
692 | /* | |
511707d4 | 693 | * We use PATH to find git commands, but we prepend some higher |
3ea3c215 | 694 | * precedence paths: the "--exec-path" option, the GIT_EXEC_PATH |
511707d4 SP |
695 | * environment, and the $(gitexecdir) from the Makefile at build |
696 | * time. | |
231af832 | 697 | */ |
e1464ca7 | 698 | setup_path(); |
8e49d503 | 699 | |
a025463b | 700 | while (1) { |
8fa7975b | 701 | int was_alias = run_argv(&argc, &argv); |
a907e1b6 | 702 | if (errno != ENOENT) |
a025463b | 703 | break; |
a907e1b6 | 704 | if (was_alias) { |
f3dd015c | 705 | fprintf(stderr, "Expansion of alias '%s' failed; " |
7283bbc7 | 706 | "'%s' is not a git command\n", |
f3dd015c TT |
707 | cmd, argv[0]); |
708 | exit(1); | |
709 | } | |
a907e1b6 AS |
710 | if (!done_help) { |
711 | cmd = argv[0] = help_unknown_cmd(cmd); | |
712 | done_help = 1; | |
713 | } else | |
714 | break; | |
f3dd015c | 715 | } |
10b15b86 AR |
716 | |
717 | fprintf(stderr, "Failed to run command '%s': %s\n", | |
33ebb871 | 718 | cmd, strerror(errno)); |
8e49d503 AE |
719 | |
720 | return 1; | |
721 | } |