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chromium / external / github.com / git / git / refs/tags/v2.4.0 / . / git.c
blob: 42a4ee57843f569fb754121f01bb8c46feee2fd3 [file] [log] [blame]
Junio C Hamano85023572006-12-19 22:34:12[diff] [blame]1#include "builtin.h"
Thiago Farinafd5c3632010-09-01 02:29:08[diff] [blame]2#include "exec_cmd.h"
3#include "help.h"
Jeff Kingd8e96fd2009-01-28 07:38:14[diff] [blame]4#include "run-command.h"
Andreas Ericsson8e49d502005-11-15 23:31:25[diff] [blame]5
Ramsay Allan Jones822a7d52006-07-30 21:42:25[diff] [blame]6const char git_usage_string[] =
Nazri Ramliy44e1e4d2013-09-09 13:47:43[diff] [blame]7 "git [--version] [--help] [-C <path>] [-c name=value]\n"
Kevin Bracey03a0fb02013-03-11 19:44:15[diff] [blame]8 " [--exec-path[=<path>]] [--html-path] [--man-path] [--info-path]\n"
Alex Henrie9c9b4f22015-01-13 07:44:47[diff] [blame]9 " [-p | --paginate | --no-pager] [--no-replace-objects] [--bare]\n"
Josh Tripletta1bea2c2011-07-05 17:54:44[diff] [blame]10 " [--git-dir=<path>] [--work-tree=<path>] [--namespace=<name>]\n"
Štěpán Němec62b46982010-10-08 17:31:15[diff] [blame]11 " <command> [<args>]";
Ramsay Allan Jones822a7d52006-07-30 21:42:25[diff] [blame]12
Teemu Likonenb7d96812008-06-05 21:15:36[diff] [blame]13const char git_more_info_string[] =
Alex Henriead5fe372014-08-30 19:56:01[diff] [blame]14 N_("'git help -a' and 'git help -g' list available subcommands and some\n"
Philip Oakley73903d02013-04-02 22:39:48[diff] [blame]15 "concept guides. See 'git help <command>' or 'git help <concept>'\n"
16 "to read about a specific subcommand or concept.");
Teemu Likonenb7d96812008-06-05 21:15:36[diff] [blame]17
Nguyễn Thái Ngọc Duye37c1322010-08-06 02:40:35[diff] [blame]18static struct startup_info git_startup_info;
Jeff King4e107382008-07-03 11:46:57[diff] [blame]19static int use_pager = -1;
Junio C Hamanof6556512014-09-02 20:27:45[diff] [blame]20static char *orig_cwd;
Nguyễn Thái Ngọc Duyc0562612014-06-08 09:37:10[diff] [blame]21static const char *env_names[] = {
22 GIT_DIR_ENVIRONMENT,
23 GIT_WORK_TREE_ENVIRONMENT,
24 GIT_IMPLICIT_WORK_TREE_ENVIRONMENT,
25 GIT_PREFIX_ENVIRONMENT
26};
27static char *orig_env[4];
28static int saved_environment;
29
30static void save_env(void)
31{
32 int i;
33 if (saved_environment)
34 return;
35 saved_environment = 1;
Junio C Hamanof6556512014-09-02 20:27:45[diff] [blame]36 orig_cwd = xgetcwd();
Nguyễn Thái Ngọc Duyc0562612014-06-08 09:37:10[diff] [blame]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
44static void restore_env(void)
45{
46 int i;
Junio C Hamanof6556512014-09-02 20:27:45[diff] [blame]47 if (orig_cwd && chdir(orig_cwd))
Nguyễn Thái Ngọc Duyc0562612014-06-08 09:37:10[diff] [blame]48 die_errno("could not move to %s", orig_cwd);
Junio C Hamanof6556512014-09-02 20:27:45[diff] [blame]49 free(orig_cwd);
Nguyễn Thái Ngọc Duyc0562612014-06-08 09:37:10[diff] [blame]50 for (i = 0; i < ARRAY_SIZE(env_names); i++) {
51 if (orig_env[i])
52 setenv(env_names[i], orig_env[i], 1);
53 else
54 unsetenv(env_names[i]);
55 }
56}
Jeff King4e107382008-07-03 11:46:57[diff] [blame]57
58static void commit_pager_choice(void) {
59 switch (use_pager) {
60 case 0:
61 setenv("GIT_PAGER", "cat", 1);
62 break;
63 case 1:
64 setup_pager();
65 break;
66 default:
67 break;
68 }
69}
70
Felipe Contreras4b25d092009-05-01 09:06:36[diff] [blame]71static int handle_options(const char ***argv, int *argc, int *envchanged)
Johannes Schindelin4ab243a2006-07-24 12:10:45[diff] [blame]72{
Junio C Hamano73546c02011-05-24 22:50:35[diff] [blame]73 const char **orig_argv = *argv;
Johannes Schindelin4ab243a2006-07-24 12:10:45[diff] [blame]74
75 while (*argc > 0) {
76 const char *cmd = (*argv)[0];
77 if (cmd[0] != '-')
78 break;
79
Johannes Schindelin6acbcb92006-07-25 18:24:22[diff] [blame]80 /*
81 * For legacy reasons, the "version" and "help"
82 * commands can be written with "--" prepended
83 * to make them look like flags.
84 */
85 if (!strcmp(cmd, "--help") || !strcmp(cmd, "--version"))
86 break;
87
88 /*
89 * Check remaining flags.
90 */
Jeff Kingae021d82014-06-18 19:47:50[diff] [blame]91 if (skip_prefix(cmd, "--exec-path", &cmd)) {
Johannes Schindelin6acbcb92006-07-25 18:24:22[diff] [blame]92 if (*cmd == '=')
Scott R Parish384df832007-10-27 08:36:51[diff] [blame]93 git_set_argv_exec_path(cmd + 1);
Johannes Schindelin6acbcb92006-07-25 18:24:22[diff] [blame]94 else {
95 puts(git_exec_path());
96 exit(0);
97 }
Markus Heidelberg89a56bf2009-04-05 02:15:16[diff] [blame]98 } else if (!strcmp(cmd, "--html-path")) {
99 puts(system_path(GIT_HTML_PATH));
100 exit(0);
Jon Seymourf2dd8c32011-05-01 08:16:25[diff] [blame]101 } else if (!strcmp(cmd, "--man-path")) {
102 puts(system_path(GIT_MAN_PATH));
103 exit(0);
104 } else if (!strcmp(cmd, "--info-path")) {
105 puts(system_path(GIT_INFO_PATH));
106 exit(0);
Johannes Schindelin6acbcb92006-07-25 18:24:22[diff] [blame]107 } else if (!strcmp(cmd, "-p") || !strcmp(cmd, "--paginate")) {
Jeff King4e107382008-07-03 11:46:57[diff] [blame]108 use_pager = 1;
Matthieu Moy463a8492007-08-19 17:24:36[diff] [blame]109 } else if (!strcmp(cmd, "--no-pager")) {
Jeff King4e107382008-07-03 11:46:57[diff] [blame]110 use_pager = 0;
Matthieu Moy463a8492007-08-19 17:24:36[diff] [blame]111 if (envchanged)
112 *envchanged = 1;
Christian Couderb0fa7ab2009-10-12 20:30:32[diff] [blame]113 } else if (!strcmp(cmd, "--no-replace-objects")) {
Michael Haggertyafc711b2014-02-18 11:24:55[diff] [blame]114 check_replace_refs = 0;
Christian Couder6476b382009-11-18 06:50:58[diff] [blame]115 setenv(NO_REPLACE_OBJECTS_ENVIRONMENT, "1", 1);
116 if (envchanged)
117 *envchanged = 1;
Johannes Schindelin6acbcb92006-07-25 18:24:22[diff] [blame]118 } else if (!strcmp(cmd, "--git-dir")) {
Brian Gernhardtc321f002006-12-22 13:56:25[diff] [blame]119 if (*argc < 2) {
120 fprintf(stderr, "No directory given for --git-dir.\n" );
121 usage(git_usage_string);
122 }
Shawn O. Pearce45b09792006-12-31 04:29:11[diff] [blame]123 setenv(GIT_DIR_ENVIRONMENT, (*argv)[1], 1);
Matthias Lederhofer4394efe2007-06-08 20:57:55[diff] [blame]124 if (envchanged)
125 *envchanged = 1;
Johannes Schindelin6acbcb92006-07-25 18:24:22[diff] [blame]126 (*argv)++;
127 (*argc)--;
Jeff Kingae021d82014-06-18 19:47:50[diff] [blame]128 } else if (skip_prefix(cmd, "--git-dir=", &cmd)) {
129 setenv(GIT_DIR_ENVIRONMENT, cmd, 1);
Matthias Lederhofer4394efe2007-06-08 20:57:55[diff] [blame]130 if (envchanged)
131 *envchanged = 1;
Josh Tripletta1bea2c2011-07-05 17:54:44[diff] [blame]132 } else if (!strcmp(cmd, "--namespace")) {
133 if (*argc < 2) {
134 fprintf(stderr, "No namespace given for --namespace.\n" );
135 usage(git_usage_string);
136 }
137 setenv(GIT_NAMESPACE_ENVIRONMENT, (*argv)[1], 1);
138 if (envchanged)
139 *envchanged = 1;
140 (*argv)++;
141 (*argc)--;
Jeff Kingae021d82014-06-18 19:47:50[diff] [blame]142 } else if (skip_prefix(cmd, "--namespace=", &cmd)) {
143 setenv(GIT_NAMESPACE_ENVIRONMENT, cmd, 1);
Josh Tripletta1bea2c2011-07-05 17:54:44[diff] [blame]144 if (envchanged)
145 *envchanged = 1;
Matthias Lederhofer892c41b2007-06-06 07:10:42[diff] [blame]146 } else if (!strcmp(cmd, "--work-tree")) {
147 if (*argc < 2) {
148 fprintf(stderr, "No directory given for --work-tree.\n" );
149 usage(git_usage_string);
150 }
151 setenv(GIT_WORK_TREE_ENVIRONMENT, (*argv)[1], 1);
Matthias Lederhofer4394efe2007-06-08 20:57:55[diff] [blame]152 if (envchanged)
153 *envchanged = 1;
Matthias Lederhofer892c41b2007-06-06 07:10:42[diff] [blame]154 (*argv)++;
155 (*argc)--;
Jeff Kingae021d82014-06-18 19:47:50[diff] [blame]156 } else if (skip_prefix(cmd, "--work-tree=", &cmd)) {
157 setenv(GIT_WORK_TREE_ENVIRONMENT, cmd, 1);
Matthias Lederhofer4394efe2007-06-08 20:57:55[diff] [blame]158 if (envchanged)
159 *envchanged = 1;
Johannes Schindelin6acbcb92006-07-25 18:24:22[diff] [blame]160 } else if (!strcmp(cmd, "--bare")) {
René Scharfe4d3ab442014-07-28 18:31:57[diff] [blame]161 char *cwd = xgetcwd();
Junio C Hamano6adcca32007-08-27 07:58:06[diff] [blame]162 is_bare_repository_cfg = 1;
René Scharfe4d3ab442014-07-28 18:31:57[diff] [blame]163 setenv(GIT_DIR_ENVIRONMENT, cwd, 0);
164 free(cwd);
Jeff King2cd83d12013-03-08 09:32:22[diff] [blame]165 setenv(GIT_IMPLICIT_WORK_TREE_ENVIRONMENT, "0", 1);
Matthias Lederhofer4394efe2007-06-08 20:57:55[diff] [blame]166 if (envchanged)
167 *envchanged = 1;
Alex Riesen8b1fa772010-03-26 22:53:57[diff] [blame]168 } else if (!strcmp(cmd, "-c")) {
169 if (*argc < 2) {
170 fprintf(stderr, "-c expects a configuration string\n" );
171 usage(git_usage_string);
172 }
Jeff King2b64fc82010-08-23 19:16:00[diff] [blame]173 git_config_push_parameter((*argv)[1]);
Alex Riesen8b1fa772010-03-26 22:53:57[diff] [blame]174 (*argv)++;
175 (*argc)--;
Jeff King823ab402012-12-19 22:37:30[diff] [blame]176 } else if (!strcmp(cmd, "--literal-pathspecs")) {
177 setenv(GIT_LITERAL_PATHSPECS_ENVIRONMENT, "1", 1);
178 if (envchanged)
179 *envchanged = 1;
180 } else if (!strcmp(cmd, "--no-literal-pathspecs")) {
181 setenv(GIT_LITERAL_PATHSPECS_ENVIRONMENT, "0", 1);
182 if (envchanged)
183 *envchanged = 1;
Nguyễn Thái Ngọc Duybd30c2e2013-07-14 08:36:08[diff] [blame]184 } else if (!strcmp(cmd, "--glob-pathspecs")) {
185 setenv(GIT_GLOB_PATHSPECS_ENVIRONMENT, "1", 1);
186 if (envchanged)
187 *envchanged = 1;
188 } else if (!strcmp(cmd, "--noglob-pathspecs")) {
189 setenv(GIT_NOGLOB_PATHSPECS_ENVIRONMENT, "1", 1);
190 if (envchanged)
191 *envchanged = 1;
Nguyễn Thái Ngọc Duy93d93532013-07-14 08:36:09[diff] [blame]192 } else if (!strcmp(cmd, "--icase-pathspecs")) {
193 setenv(GIT_ICASE_PATHSPECS_ENVIRONMENT, "1", 1);
194 if (envchanged)
195 *envchanged = 1;
Nguyễn Thái Ngọc Duy6035d6a2013-05-26 01:16:15[diff] [blame]196 } else if (!strcmp(cmd, "--shallow-file")) {
197 (*argv)++;
198 (*argc)--;
Nguyễn Thái Ngọc Duy069c0532013-12-05 13:02:45[diff] [blame]199 set_alternate_shallow_file((*argv)[0], 1);
Nguyễn Thái Ngọc Duy6035d6a2013-05-26 01:16:15[diff] [blame]200 if (envchanged)
201 *envchanged = 1;
Nazri Ramliy44e1e4d2013-09-09 13:47:43[diff] [blame]202 } else if (!strcmp(cmd, "-C")) {
203 if (*argc < 2) {
204 fprintf(stderr, "No directory given for -C.\n" );
205 usage(git_usage_string);
206 }
Karthik Nayak6a536e22015-03-06 11:18:08[diff] [blame]207 if ((*argv)[1][0]) {
208 if (chdir((*argv)[1]))
209 die_errno("Cannot change to '%s'", (*argv)[1]);
210 if (envchanged)
211 *envchanged = 1;
212 }
Nazri Ramliy44e1e4d2013-09-09 13:47:43[diff] [blame]213 (*argv)++;
214 (*argc)--;
Johannes Schindelin6acbcb92006-07-25 18:24:22[diff] [blame]215 } else {
216 fprintf(stderr, "Unknown option: %s\n", cmd);
Ramsay Allan Jones822a7d52006-07-30 21:42:25[diff] [blame]217 usage(git_usage_string);
Johannes Schindelin6acbcb92006-07-25 18:24:22[diff] [blame]218 }
Johannes Schindelin4ab243a2006-07-24 12:10:45[diff] [blame]219
220 (*argv)++;
221 (*argc)--;
Johannes Schindelin4ab243a2006-07-24 12:10:45[diff] [blame]222 }
Junio C Hamano73546c02011-05-24 22:50:35[diff] [blame]223 return (*argv) - orig_argv;
Johannes Schindelin4ab243a2006-07-24 12:10:45[diff] [blame]224}
225
Johannes Schindelin2b11e312006-06-05 17:43:52[diff] [blame]226static int handle_alias(int *argcp, const char ***argv)
227{
SZEDER Gáboraf05d672008-03-25 21:06:26[diff] [blame]228 int envchanged = 0, ret = 0, saved_errno = errno;
Johannes Schindelin2b11e312006-06-05 17:43:52[diff] [blame]229 const char *subdir;
Matthias Lederhofer0347a8c2006-07-30 01:30:29[diff] [blame]230 int count, option_count;
Felipe Contreras4b25d092009-05-01 09:06:36[diff] [blame]231 const char **new_argv;
Jeff King94351112008-02-24 22:17:14[diff] [blame]232 const char *alias_command;
233 char *alias_string;
Junio C Hamanoe85dc0a2008-04-01 04:33:09[diff] [blame]234 int unused_nongit;
Johannes Schindelin2b11e312006-06-05 17:43:52[diff] [blame]235
Junio C Hamanoe85dc0a2008-04-01 04:33:09[diff] [blame]236 subdir = setup_git_directory_gently(&unused_nongit);
Johannes Schindelin2b11e312006-06-05 17:43:52[diff] [blame]237
Matthias Lederhofer0347a8c2006-07-30 01:30:29[diff] [blame]238 alias_command = (*argv)[0];
Jeff King94351112008-02-24 22:17:14[diff] [blame]239 alias_string = alias_lookup(alias_command);
Matthias Lederhofer0347a8c2006-07-30 01:30:29[diff] [blame]240 if (alias_string) {
Theodore Ts'odfd42a32007-02-11 00:33:58[diff] [blame]241 if (alias_string[0] == '!') {
Erik Faye-Lund7f51f8b2011-01-06 23:00:38[diff] [blame]242 const char **alias_argv;
243 int argc = *argcp, i;
Johannes Schindelina2f80282007-07-01 21:51:58[diff] [blame]244
Erik Faye-Lund7f51f8b2011-01-06 23:00:38[diff] [blame]245 commit_pager_choice();
246
247 /* build alias_argv */
248 alias_argv = xmalloc(sizeof(*alias_argv) * (argc + 1));
249 alias_argv[0] = alias_string + 1;
250 for (i = 1; i < argc; ++i)
251 alias_argv[i] = (*argv)[i];
252 alias_argv[argc] = NULL;
253
David Aguilar26b05252011-05-26 03:37:13[diff] [blame]254 ret = run_command_v_opt(alias_argv, RUN_USING_SHELL);
Erik Faye-Lund7f51f8b2011-01-06 23:00:38[diff] [blame]255 if (ret >= 0) /* normal exit */
256 exit(ret);
257
258 die_errno("While expanding alias '%s': '%s'",
259 alias_command, alias_string + 1);
Theodore Ts'odfd42a32007-02-11 00:33:58[diff] [blame]260 }
Matthias Lederhofer0347a8c2006-07-30 01:30:29[diff] [blame]261 count = split_cmdline(alias_string, &new_argv);
Deskin Millerdc4179f2008-09-22 15:06:41[diff] [blame]262 if (count < 0)
Greg Brockmanad9ac6d2010-08-07 05:13:39[diff] [blame]263 die("Bad alias.%s string: %s", alias_command,
264 split_cmdline_strerror(count));
Matthias Lederhofer4394efe2007-06-08 20:57:55[diff] [blame]265 option_count = handle_options(&new_argv, &count, &envchanged);
266 if (envchanged)
267 die("alias '%s' changes environment variables\n"
268 "You can use '!git' in the alias to do this.",
269 alias_command);
Matthias Lederhofer0347a8c2006-07-30 01:30:29[diff] [blame]270 memmove(new_argv - option_count, new_argv,
271 count * sizeof(char *));
272 new_argv -= option_count;
Johannes Schindelin2b11e312006-06-05 17:43:52[diff] [blame]273
Matthias Lederhofer0347a8c2006-07-30 01:30:29[diff] [blame]274 if (count < 1)
275 die("empty alias for %s", alias_command);
Johannes Schindelin2b11e312006-06-05 17:43:52[diff] [blame]276
Matthias Lederhofer0347a8c2006-07-30 01:30:29[diff] [blame]277 if (!strcmp(alias_command, new_argv[0]))
278 die("recursive alias: %s", alias_command);
Johannes Schindelin2b11e312006-06-05 17:43:52[diff] [blame]279
Christian Couderb319ce42007-12-03 04:51:50[diff] [blame]280 trace_argv_printf(new_argv,
Christian Couder6ce4e612006-09-02 16:23:48[diff] [blame]281 "trace: alias expansion: %s =>",
282 alias_command);
Matthias Lederhofer0347a8c2006-07-30 01:30:29[diff] [blame]283
René Scharfe2756ca42014-09-16 18:56:57[diff] [blame]284 REALLOC_ARRAY(new_argv, count + *argcp);
Matthias Lederhofer0347a8c2006-07-30 01:30:29[diff] [blame]285 /* insert after command name */
Felipe Contreras4b25d092009-05-01 09:06:36[diff] [blame]286 memcpy(new_argv + count, *argv + 1, sizeof(char *) * *argcp);
Matthias Lederhofer0347a8c2006-07-30 01:30:29[diff] [blame]287
288 *argv = new_argv;
289 *argcp += count - 1;
290
291 ret = 1;
Johannes Schindelin2b11e312006-06-05 17:43:52[diff] [blame]292 }
293
Alex Riesen7be77de2008-12-05 00:36:46[diff] [blame]294 if (subdir && chdir(subdir))
Thomas Rastd824cbb2009-06-27 15:58:46[diff] [blame]295 die_errno("Cannot change to '%s'", subdir);
Johannes Schindelin2b11e312006-06-05 17:43:52[diff] [blame]296
Johannes Schindelin47e5c0c2006-06-28 10:45:27[diff] [blame]297 errno = saved_errno;
298
Johannes Schindelin2b11e312006-06-05 17:43:52[diff] [blame]299 return ret;
300}
301
Nguyễn Thái Ngọc Duyee38dfb2010-08-06 02:52:16[diff] [blame]302#define RUN_SETUP (1<<0)
303#define RUN_SETUP_GENTLY (1<<1)
304#define USE_PAGER (1<<2)
Shawn O. Pearce7eff28a2006-12-31 04:32:38[diff] [blame]305/*
306 * require working tree to be present -- anything uses this needs
307 * RUN_SETUP for reading from the configuration file.
308 */
Nguyễn Thái Ngọc Duyee38dfb2010-08-06 02:52:16[diff] [blame]309#define NEED_WORK_TREE (1<<3)
Nguyễn Thái Ngọc Duyc0562612014-06-08 09:37:10[diff] [blame]310#define NO_SETUP (1<<4)
Linus Torvaldsa633fca2006-07-29 05:44:25[diff] [blame]311
Linus Torvalds47d0b4f2007-06-24 17:10:40[diff] [blame]312struct cmd_struct {
313 const char *cmd;
314 int (*fn)(int, const char **, const char *);
315 int option;
316};
317
Jeff Kingf172f332009-01-28 07:33:53[diff] [blame]318static int run_builtin(struct cmd_struct *p, int argc, const char **argv)
Linus Torvalds47d0b4f2007-06-24 17:10:40[diff] [blame]319{
Jonathan Nieder99caeed2009-11-09 15:05:01[diff] [blame]320 int status, help;
Linus Torvalds0f157312007-06-24 17:29:33[diff] [blame]321 struct stat st;
Linus Torvalds47d0b4f2007-06-24 17:10:40[diff] [blame]322 const char *prefix;
323
324 prefix = NULL;
Jonathan Nieder99caeed2009-11-09 15:05:01[diff] [blame]325 help = argc == 2 && !strcmp(argv[1], "-h");
326 if (!help) {
327 if (p->option & RUN_SETUP)
328 prefix = setup_git_directory();
Luis R. Rodriguez27bd38d2014-04-22 00:47:56[diff] [blame]329 else if (p->option & RUN_SETUP_GENTLY) {
Nguyễn Thái Ngọc Duyee38dfb2010-08-06 02:52:16[diff] [blame]330 int nongit_ok;
331 prefix = setup_git_directory_gently(&nongit_ok);
332 }
Jeff King4e107382008-07-03 11:46:57[diff] [blame]333
Nguyễn Thái Ngọc Duyee38dfb2010-08-06 02:52:16[diff] [blame]334 if (use_pager == -1 && p->option & (RUN_SETUP | RUN_SETUP_GENTLY))
Jonathan Nieder99caeed2009-11-09 15:05:01[diff] [blame]335 use_pager = check_pager_config(p->cmd);
336 if (use_pager == -1 && p->option & USE_PAGER)
337 use_pager = 1;
Nguyễn Thái Ngọc Duya9ca8a82010-11-26 15:31:57[diff] [blame]338
339 if ((p->option & (RUN_SETUP | RUN_SETUP_GENTLY)) &&
340 startup_info->have_repository) /* get_git_dir() may set up repo, avoid that */
341 trace_repo_setup(prefix);
Jonathan Nieder99caeed2009-11-09 15:05:01[diff] [blame]342 }
Jeff King4e107382008-07-03 11:46:57[diff] [blame]343 commit_pager_choice();
344
Jonathan Nieder99caeed2009-11-09 15:05:01[diff] [blame]345 if (!help && p->option & NEED_WORK_TREE)
Mike Hommey59f0f2f2007-11-03 11:23:11[diff] [blame]346 setup_work_tree();
347
Christian Couderb319ce42007-12-03 04:51:50[diff] [blame]348 trace_argv_printf(argv, "trace: built-in: git");
Linus Torvalds47d0b4f2007-06-24 17:10:40[diff] [blame]349
Linus Torvalds0f157312007-06-24 17:29:33[diff] [blame]350 status = p->fn(argc, argv, prefix);
351 if (status)
Johannes Sixt47e3de02009-07-05 18:57:46[diff] [blame]352 return status;
Linus Torvalds0f157312007-06-24 17:29:33[diff] [blame]353
354 /* Somebody closed stdout? */
355 if (fstat(fileno(stdout), &st))
356 return 0;
357 /* Ignore write errors for pipes and sockets.. */
358 if (S_ISFIFO(st.st_mode) || S_ISSOCK(st.st_mode))
359 return 0;
360
361 /* Check for ENOSPC and EIO errors.. */
Linus Torvalds0227f982007-06-30 18:44:20[diff] [blame]362 if (fflush(stdout))
Thomas Rastd824cbb2009-06-27 15:58:46[diff] [blame]363 die_errno("write failure on standard output");
Linus Torvalds0227f982007-06-30 18:44:20[diff] [blame]364 if (ferror(stdout))
365 die("unknown write failure on standard output");
366 if (fclose(stdout))
Thomas Rastd824cbb2009-06-27 15:58:46[diff] [blame]367 die_errno("close failed on standard output");
Linus Torvalds0f157312007-06-24 17:29:33[diff] [blame]368 return 0;
Linus Torvalds47d0b4f2007-06-24 17:10:40[diff] [blame]369}
370
Sebastian Schuberthc6127fa2014-01-02 16:17:11[diff] [blame]371static struct cmd_struct commands[] = {
372 { "add", cmd_add, RUN_SETUP | NEED_WORK_TREE },
373 { "annotate", cmd_annotate, RUN_SETUP },
374 { "apply", cmd_apply, RUN_SETUP_GENTLY },
375 { "archive", cmd_archive },
376 { "bisect--helper", cmd_bisect__helper, RUN_SETUP },
377 { "blame", cmd_blame, RUN_SETUP },
378 { "branch", cmd_branch, RUN_SETUP },
379 { "bundle", cmd_bundle, RUN_SETUP_GENTLY },
380 { "cat-file", cmd_cat_file, RUN_SETUP },
381 { "check-attr", cmd_check_attr, RUN_SETUP },
382 { "check-ignore", cmd_check_ignore, RUN_SETUP | NEED_WORK_TREE },
383 { "check-mailmap", cmd_check_mailmap, RUN_SETUP },
384 { "check-ref-format", cmd_check_ref_format },
385 { "checkout", cmd_checkout, RUN_SETUP | NEED_WORK_TREE },
386 { "checkout-index", cmd_checkout_index,
387 RUN_SETUP | NEED_WORK_TREE},
388 { "cherry", cmd_cherry, RUN_SETUP },
389 { "cherry-pick", cmd_cherry_pick, RUN_SETUP | NEED_WORK_TREE },
390 { "clean", cmd_clean, RUN_SETUP | NEED_WORK_TREE },
Nguyễn Thái Ngọc Duyc0562612014-06-08 09:37:10[diff] [blame]391 { "clone", cmd_clone, NO_SETUP },
Sebastian Schuberthc6127fa2014-01-02 16:17:11[diff] [blame]392 { "column", cmd_column, RUN_SETUP_GENTLY },
393 { "commit", cmd_commit, RUN_SETUP | NEED_WORK_TREE },
394 { "commit-tree", cmd_commit_tree, RUN_SETUP },
395 { "config", cmd_config, RUN_SETUP_GENTLY },
396 { "count-objects", cmd_count_objects, RUN_SETUP },
397 { "credential", cmd_credential, RUN_SETUP_GENTLY },
398 { "describe", cmd_describe, RUN_SETUP },
399 { "diff", cmd_diff },
400 { "diff-files", cmd_diff_files, RUN_SETUP | NEED_WORK_TREE },
401 { "diff-index", cmd_diff_index, RUN_SETUP },
402 { "diff-tree", cmd_diff_tree, RUN_SETUP },
403 { "fast-export", cmd_fast_export, RUN_SETUP },
404 { "fetch", cmd_fetch, RUN_SETUP },
405 { "fetch-pack", cmd_fetch_pack, RUN_SETUP },
406 { "fmt-merge-msg", cmd_fmt_merge_msg, RUN_SETUP },
407 { "for-each-ref", cmd_for_each_ref, RUN_SETUP },
408 { "format-patch", cmd_format_patch, RUN_SETUP },
409 { "fsck", cmd_fsck, RUN_SETUP },
410 { "fsck-objects", cmd_fsck, RUN_SETUP },
411 { "gc", cmd_gc, RUN_SETUP },
412 { "get-tar-commit-id", cmd_get_tar_commit_id },
413 { "grep", cmd_grep, RUN_SETUP_GENTLY },
414 { "hash-object", cmd_hash_object },
415 { "help", cmd_help },
416 { "index-pack", cmd_index_pack, RUN_SETUP_GENTLY },
Nguyễn Thái Ngọc Duyc0562612014-06-08 09:37:10[diff] [blame]417 { "init", cmd_init_db, NO_SETUP },
418 { "init-db", cmd_init_db, NO_SETUP },
Christian Couder6634f052014-10-13 18:16:29[diff] [blame]419 { "interpret-trailers", cmd_interpret_trailers, RUN_SETUP },
Sebastian Schuberthc6127fa2014-01-02 16:17:11[diff] [blame]420 { "log", cmd_log, RUN_SETUP },
421 { "ls-files", cmd_ls_files, RUN_SETUP },
422 { "ls-remote", cmd_ls_remote, RUN_SETUP_GENTLY },
423 { "ls-tree", cmd_ls_tree, RUN_SETUP },
424 { "mailinfo", cmd_mailinfo },
425 { "mailsplit", cmd_mailsplit },
426 { "merge", cmd_merge, RUN_SETUP | NEED_WORK_TREE },
427 { "merge-base", cmd_merge_base, RUN_SETUP },
428 { "merge-file", cmd_merge_file, RUN_SETUP_GENTLY },
429 { "merge-index", cmd_merge_index, RUN_SETUP },
430 { "merge-ours", cmd_merge_ours, RUN_SETUP },
431 { "merge-recursive", cmd_merge_recursive, RUN_SETUP | NEED_WORK_TREE },
432 { "merge-recursive-ours", cmd_merge_recursive, RUN_SETUP | NEED_WORK_TREE },
433 { "merge-recursive-theirs", cmd_merge_recursive, RUN_SETUP | NEED_WORK_TREE },
434 { "merge-subtree", cmd_merge_recursive, RUN_SETUP | NEED_WORK_TREE },
435 { "merge-tree", cmd_merge_tree, RUN_SETUP },
436 { "mktag", cmd_mktag, RUN_SETUP },
437 { "mktree", cmd_mktree, RUN_SETUP },
438 { "mv", cmd_mv, RUN_SETUP | NEED_WORK_TREE },
439 { "name-rev", cmd_name_rev, RUN_SETUP },
440 { "notes", cmd_notes, RUN_SETUP },
441 { "pack-objects", cmd_pack_objects, RUN_SETUP },
442 { "pack-redundant", cmd_pack_redundant, RUN_SETUP },
443 { "pack-refs", cmd_pack_refs, RUN_SETUP },
444 { "patch-id", cmd_patch_id },
445 { "pickaxe", cmd_blame, RUN_SETUP },
446 { "prune", cmd_prune, RUN_SETUP },
447 { "prune-packed", cmd_prune_packed, RUN_SETUP },
448 { "push", cmd_push, RUN_SETUP },
449 { "read-tree", cmd_read_tree, RUN_SETUP },
450 { "receive-pack", cmd_receive_pack },
451 { "reflog", cmd_reflog, RUN_SETUP },
452 { "remote", cmd_remote, RUN_SETUP },
453 { "remote-ext", cmd_remote_ext },
454 { "remote-fd", cmd_remote_fd },
455 { "repack", cmd_repack, RUN_SETUP },
456 { "replace", cmd_replace, RUN_SETUP },
457 { "rerere", cmd_rerere, RUN_SETUP },
458 { "reset", cmd_reset, RUN_SETUP },
459 { "rev-list", cmd_rev_list, RUN_SETUP },
460 { "rev-parse", cmd_rev_parse },
461 { "revert", cmd_revert, RUN_SETUP | NEED_WORK_TREE },
462 { "rm", cmd_rm, RUN_SETUP },
463 { "send-pack", cmd_send_pack, RUN_SETUP },
464 { "shortlog", cmd_shortlog, RUN_SETUP_GENTLY | USE_PAGER },
465 { "show", cmd_show, RUN_SETUP },
466 { "show-branch", cmd_show_branch, RUN_SETUP },
467 { "show-ref", cmd_show_ref, RUN_SETUP },
468 { "stage", cmd_add, RUN_SETUP | NEED_WORK_TREE },
469 { "status", cmd_status, RUN_SETUP | NEED_WORK_TREE },
470 { "stripspace", cmd_stripspace },
471 { "symbolic-ref", cmd_symbolic_ref, RUN_SETUP },
472 { "tag", cmd_tag, RUN_SETUP },
473 { "unpack-file", cmd_unpack_file, RUN_SETUP },
474 { "unpack-objects", cmd_unpack_objects, RUN_SETUP },
475 { "update-index", cmd_update_index, RUN_SETUP },
476 { "update-ref", cmd_update_ref, RUN_SETUP },
477 { "update-server-info", cmd_update_server_info, RUN_SETUP },
478 { "upload-archive", cmd_upload_archive },
479 { "upload-archive--writer", cmd_upload_archive_writer },
480 { "var", cmd_var, RUN_SETUP_GENTLY },
Michael J Gruberd07b00b2014-06-23 07:05:49[diff] [blame]481 { "verify-commit", cmd_verify_commit, RUN_SETUP },
Sebastian Schuberthc6127fa2014-01-02 16:17:11[diff] [blame]482 { "verify-pack", cmd_verify_pack },
483 { "verify-tag", cmd_verify_tag, RUN_SETUP },
484 { "version", cmd_version },
485 { "whatchanged", cmd_whatchanged, RUN_SETUP },
486 { "write-tree", cmd_write_tree, RUN_SETUP },
487};
488
Slavomir Vlcekc4f901d2014-11-12 13:10:22[diff] [blame]489static struct cmd_struct *get_builtin(const char *s)
Sebastian Schuberthc6127fa2014-01-02 16:17:11[diff] [blame]490{
491 int i;
492 for (i = 0; i < ARRAY_SIZE(commands); i++) {
Slavomir Vlcekc4f901d2014-11-12 13:10:22[diff] [blame]493 struct cmd_struct *p = commands + i;
Sebastian Schuberthc6127fa2014-01-02 16:17:11[diff] [blame]494 if (!strcmp(s, p->cmd))
Slavomir Vlcekc4f901d2014-11-12 13:10:22[diff] [blame]495 return p;
Sebastian Schuberthc6127fa2014-01-02 16:17:11[diff] [blame]496 }
Slavomir Vlcekc4f901d2014-11-12 13:10:22[diff] [blame]497 return NULL;
498}
499
500int is_builtin(const char *s)
501{
502 return !!get_builtin(s);
Sebastian Schuberthc6127fa2014-01-02 16:17:11[diff] [blame]503}
504
Sebastian Schuberth3f784a42014-01-02 16:15:44[diff] [blame]505static void handle_builtin(int argc, const char **argv)
Linus Torvalds231af832006-02-26 20:34:51[diff] [blame]506{
507 const char *cmd = argv[0];
Linus Torvalds231af832006-02-26 20:34:51[diff] [blame]508 int i;
Johannes Sixt23326d12007-12-08 19:57:25[diff] [blame]509 static const char ext[] = STRIP_EXTENSION;
Slavomir Vlcekc4f901d2014-11-12 13:10:22[diff] [blame]510 struct cmd_struct *builtin;
Johannes Sixt23326d12007-12-08 19:57:25[diff] [blame]511
512 if (sizeof(ext) > 1) {
513 i = strlen(argv[0]) - strlen(ext);
514 if (i > 0 && !strcmp(argv[0] + i, ext)) {
Dotan Barake8eec712008-09-09 18:57:10[diff] [blame]515 char *argv0 = xstrdup(argv[0]);
Johannes Sixt23326d12007-12-08 19:57:25[diff] [blame]516 argv[0] = cmd = argv0;
517 argv0[i] = '\0';
518 }
519 }
Linus Torvalds231af832006-02-26 20:34:51[diff] [blame]520
Linus Torvalds1cd95082006-04-15 18:13:49[diff] [blame]521 /* Turn "git cmd --help" into "git help cmd" */
522 if (argc > 1 && !strcmp(argv[1], "--help")) {
523 argv[1] = argv[0];
524 argv[0] = cmd = "help";
525 }
526
Slavomir Vlcekc4f901d2014-11-12 13:10:22[diff] [blame]527 builtin = get_builtin(cmd);
528 if (builtin) {
529 if (saved_environment && (builtin->option & NO_SETUP))
Nguyễn Thái Ngọc Duyc0562612014-06-08 09:37:10[diff] [blame]530 restore_env();
Slavomir Vlcekc4f901d2014-11-12 13:10:22[diff] [blame]531 else
532 exit(run_builtin(builtin, argc, argv));
Linus Torvalds231af832006-02-26 20:34:51[diff] [blame]533 }
534}
535
Junio C Hamano7550be02007-12-02 06:09:22[diff] [blame]536static void execv_dashed_external(const char **argv)
537{
Brandon Caseyf285a2d2008-10-09 19:12:12[diff] [blame]538 struct strbuf cmd = STRBUF_INIT;
Junio C Hamano7550be02007-12-02 06:09:22[diff] [blame]539 const char *tmp;
Jeff Kingd8e96fd2009-01-28 07:38:14[diff] [blame]540 int status;
Junio C Hamano7550be02007-12-02 06:09:22[diff] [blame]541
Jeff King92058e42011-08-18 22:01:32[diff] [blame]542 if (use_pager == -1)
543 use_pager = check_pager_config(argv[0]);
Jonathan Nieder030149a2010-07-14 22:55:12[diff] [blame]544 commit_pager_choice();
545
Junio C Hamano7550be02007-12-02 06:09:22[diff] [blame]546 strbuf_addf(&cmd, "git-%s", argv[0]);
547
548 /*
549 * argv[0] must be the git command, but the argv array
550 * belongs to the caller, and may be reused in
551 * subsequent loop iterations. Save argv[0] and
552 * restore it on error.
553 */
554 tmp = argv[0];
555 argv[0] = cmd.buf;
556
557 trace_argv_printf(argv, "trace: exec:");
558
Jeff Kingd8e96fd2009-01-28 07:38:14[diff] [blame]559 /*
560 * if we fail because the command is not found, it is
561 * OK to return. Otherwise, we just pass along the status code.
562 */
Clemens Buchacher10c6cdd2012-01-08 20:41:09[diff] [blame]563 status = run_command_v_opt(argv, RUN_SILENT_EXEC_FAILURE | RUN_CLEAN_ON_EXIT);
Johannes Sixt0ac77ec2009-07-04 19:26:40[diff] [blame]564 if (status >= 0 || errno != ENOENT)
Johannes Sixt5709e032009-07-04 19:26:39[diff] [blame]565 exit(status);
Junio C Hamano7550be02007-12-02 06:09:22[diff] [blame]566
567 argv[0] = tmp;
568
569 strbuf_release(&cmd);
570}
571
Adeodato Simóa907e1b2009-01-04 17:16:01[diff] [blame]572static int run_argv(int *argcp, const char ***argv)
573{
574 int done_alias = 0;
575
576 while (1) {
Sebastian Schuberth3f784a42014-01-02 16:15:44[diff] [blame]577 /* See if it's a builtin */
578 handle_builtin(*argcp, *argv);
Adeodato Simóa907e1b2009-01-04 17:16:01[diff] [blame]579
580 /* .. then try the external ones */
581 execv_dashed_external(*argv);
582
583 /* It could be an alias -- this works around the insanity
584 * of overriding "git log" with "git show" by having
585 * alias.log = show
586 */
Nguyễn Thái Ngọc Duyc0562612014-06-08 09:37:10[diff] [blame]587 if (done_alias)
588 break;
589 save_env();
590 if (!handle_alias(argcp, argv))
Adeodato Simóa907e1b2009-01-04 17:16:01[diff] [blame]591 break;
592 done_alias = 1;
593 }
594
595 return done_alias;
596}
597
Patrick Reynolds7559a1b2014-09-18 16:57:09[diff] [blame]598/*
599 * Many parts of Git have subprograms communicate via pipe, expect the
600 * upstream of a pipe to die with SIGPIPE when the downstream of a
601 * pipe does not need to read all that is written. Some third-party
602 * programs that ignore or block SIGPIPE for their own reason forget
603 * to restore SIGPIPE handling to the default before spawning Git and
604 * break this carefully orchestrated machinery.
605 *
606 * Restore the way SIGPIPE is handled to default, which is what we
607 * expect.
608 */
609static void restore_sigpipe_to_default(void)
610{
611 sigset_t unblock;
612
613 sigemptyset(&unblock);
614 sigaddset(&unblock, SIGPIPE);
615 sigprocmask(SIG_UNBLOCK, &unblock, NULL);
616 signal(SIGPIPE, SIG_DFL);
617}
Junio C Hamano7550be02007-12-02 06:09:22[diff] [blame]618
Ramsay Jones84d32bf2013-04-27 19:19:47[diff] [blame]619int main(int argc, char **av)
Andreas Ericsson8e49d502005-11-15 23:31:25[diff] [blame]620{
Ramsay Jones84d32bf2013-04-27 19:19:47[diff] [blame]621 const char **argv = (const char **) av;
Steve Haslam4dd47c32009-01-18 12:00:10[diff] [blame]622 const char *cmd;
Alexander Kuleshov8fa79752015-03-02 12:02:37[diff] [blame]623 int done_help = 0;
Andreas Ericsson8e49d502005-11-15 23:31:25[diff] [blame]624
Nguyễn Thái Ngọc Duye37c1322010-08-06 02:40:35[diff] [blame]625 startup_info = &git_startup_info;
626
Steffen Prohaska2cd72b02009-01-18 12:00:11[diff] [blame]627 cmd = git_extract_argv0_path(argv[0]);
628 if (!cmd)
Steve Haslam4dd47c32009-01-18 12:00:10[diff] [blame]629 cmd = "git-help";
Andreas Ericsson8e49d502005-11-15 23:31:25[diff] [blame]630
Thomas Rasta11c3962013-07-16 09:27:37[diff] [blame]631 /*
632 * Always open file descriptors 0/1/2 to avoid clobbering files
633 * in die(). It also avoids messing up when the pipes are dup'ed
634 * onto stdin/stdout/stderr in the child processes we spawn.
635 */
636 sanitize_stdfds();
637
Patrick Reynolds7559a1b2014-09-18 16:57:09[diff] [blame]638 restore_sigpipe_to_default();
639
Ævar Arnfjörð Bjarmason5e9637c2011-11-17 23:14:42[diff] [blame]640 git_setup_gettext();
641
Karsten Blees578da032014-07-12 00:07:01[diff] [blame]642 trace_command_performance(argv);
643
Linus Torvalds231af832006-02-26 20:34:51[diff] [blame]644 /*
645 * "git-xxxx" is the same as "git xxxx", but we obviously:
646 *
647 * - cannot take flags in between the "git" and the "xxxx".
648 * - cannot execute it externally (since it would just do
649 * the same thing over again)
650 *
Sebastian Schuberth3f784a42014-01-02 16:15:44[diff] [blame]651 * So we just directly call the builtin handler, and die if
652 * that one cannot handle it.
Linus Torvalds231af832006-02-26 20:34:51[diff] [blame]653 */
Jeff Kingae021d82014-06-18 19:47:50[diff] [blame]654 if (skip_prefix(cmd, "git-", &cmd)) {
Linus Torvalds231af832006-02-26 20:34:51[diff] [blame]655 argv[0] = cmd;
Sebastian Schuberth3f784a42014-01-02 16:15:44[diff] [blame]656 handle_builtin(argc, argv);
657 die("cannot handle %s as a builtin", cmd);
Linus Torvalds231af832006-02-26 20:34:51[diff] [blame]658 }
Andreas Ericsson8e49d502005-11-15 23:31:25[diff] [blame]659
Linus Torvalds231af832006-02-26 20:34:51[diff] [blame]660 /* Look for flags.. */
Johannes Schindelin6acbcb92006-07-25 18:24:22[diff] [blame]661 argv++;
662 argc--;
Matthias Lederhofer4394efe2007-06-08 20:57:55[diff] [blame]663 handle_options(&argv, &argc, NULL);
Johannes Schindelin6acbcb92006-07-25 18:24:22[diff] [blame]664 if (argc > 0) {
Jeff King6d877802014-06-18 19:56:48[diff] [blame]665 /* translate --help and --version into commands */
666 skip_prefix(argv[0], "--", &argv[0]);
Johannes Schindelin6acbcb92006-07-25 18:24:22[diff] [blame]667 } else {
Scott R Parish3d7e2d82007-10-27 08:36:49[diff] [blame]668 /* The user didn't specify a command; give them help */
Nguyễn Thái Ngọc Duy73e25e72010-06-26 19:26:37[diff] [blame]669 commit_pager_choice();
Scott R Parish3d7e2d82007-10-27 08:36:49[diff] [blame]670 printf("usage: %s\n\n", git_usage_string);
671 list_common_cmds_help();
Kevin Bracey421a9762013-03-10 15:10:20[diff] [blame]672 printf("\n%s\n", _(git_more_info_string));
Scott R Parish3d7e2d82007-10-27 08:36:49[diff] [blame]673 exit(1);
Andreas Ericsson8e49d502005-11-15 23:31:25[diff] [blame]674 }
Johannes Schindelin6acbcb92006-07-25 18:24:22[diff] [blame]675 cmd = argv[0];
Andreas Ericsson8e49d502005-11-15 23:31:25[diff] [blame]676
Linus Torvalds231af832006-02-26 20:34:51[diff] [blame]677 /*
Scott R Parish511707d2007-10-28 11:17:20[diff] [blame]678 * We use PATH to find git commands, but we prepend some higher
Mike Ralphson3ea3c212009-04-17 18:13:30[diff] [blame]679 * precedence paths: the "--exec-path" option, the GIT_EXEC_PATH
Scott R Parish511707d2007-10-28 11:17:20[diff] [blame]680 * environment, and the $(gitexecdir) from the Makefile at build
681 * time.
Linus Torvalds231af832006-02-26 20:34:51[diff] [blame]682 */
Johannes Sixte1464ca2008-07-21 19:19:52[diff] [blame]683 setup_path();
Junio C Hamano7dbc2c02005-11-16 07:13:30[diff] [blame]684
Junio C Hamanoa0254632006-06-06 01:09:40[diff] [blame]685 while (1) {
Alexander Kuleshov8fa79752015-03-02 12:02:37[diff] [blame]686 int was_alias = run_argv(&argc, &argv);
Adeodato Simóa907e1b2009-01-04 17:16:01[diff] [blame]687 if (errno != ENOENT)
Junio C Hamanoa0254632006-06-06 01:09:40[diff] [blame]688 break;
Adeodato Simóa907e1b2009-01-04 17:16:01[diff] [blame]689 if (was_alias) {
Theodore Ts'of3dd0152007-02-11 00:33:57[diff] [blame]690 fprintf(stderr, "Expansion of alias '%s' failed; "
Pete Harlan7283bbc2010-02-15 23:33:18[diff] [blame]691 "'%s' is not a git command\n",
Theodore Ts'of3dd0152007-02-11 00:33:57[diff] [blame]692 cmd, argv[0]);
693 exit(1);
694 }
Adeodato Simóa907e1b2009-01-04 17:16:01[diff] [blame]695 if (!done_help) {
696 cmd = argv[0] = help_unknown_cmd(cmd);
697 done_help = 1;
698 } else
699 break;
Theodore Ts'of3dd0152007-02-11 00:33:57[diff] [blame]700 }
Alex Riesen10b15b82005-12-01 12:48:35[diff] [blame]701
702 fprintf(stderr, "Failed to run command '%s': %s\n",
Andreas Ericsson33ebb872006-06-28 09:17:21[diff] [blame]703 cmd, strerror(errno));
Andreas Ericsson8e49d502005-11-15 23:31:25[diff] [blame]704
705 return 1;
706}