git
/
git.c
958 строк · 27.8 Кб
1#define USE_THE_REPOSITORY_VARIABLE2/*25* require working tree to be present -- anything uses this needs26* RUN_SETUP for reading from the configuration file.27*/28#define NEED_WORK_TREE (1<<3)29#define DELAY_PAGER_CONFIG (1<<4)30#define NO_PARSEOPT (1<<5) /* parse-options is not used */31{58int i = 0;59}67{70int token_len = strlen(token);71}74{77struct string_list list = STRING_LIST_INIT_DUP;78int i;79int nongit;80* Set up the repository so we can pick up any repo-level config (like83* completion.commands).84*/85setup_git_directory_gently(&nongit);86}121{124switch (use_pager) {125case 0:126setenv("GIT_PAGER", "cat", 1);127break;128case 1:129setup_pager();130break;131default:132break;133}134}135{138if (use_pager != -1 || pager_in_use())139return;140use_pager = check_pager_config(cmd);141if (use_pager == -1)142use_pager = def;143commit_pager_choice();144}145{148char *s_path = system_path(path);149puts(s_path);150free(s_path);151}152{155const char **orig_argv = *argv;156* For legacy reasons, the "version" and "help"164* commands can be written with "--" prepended165* to make them look like flags.166*/167if (!strcmp(cmd, "--help") || !strcmp(cmd, "-h") ||168!strcmp(cmd, "--version") || !strcmp(cmd, "-v"))169break;170* Check remaining flags.173*/174if (skip_prefix(cmd, "--exec-path", &cmd)) {175if (*cmd == '=')176git_set_exec_path(cmd + 1);177else {178puts(git_exec_path());179trace2_cmd_name("_query_");180exit(0);181}182} else if (!strcmp(cmd, "--html-path")) {183print_system_path(GIT_HTML_PATH);184trace2_cmd_name("_query_");185exit(0);186} else if (!strcmp(cmd, "--man-path")) {187print_system_path(GIT_MAN_PATH);188trace2_cmd_name("_query_");189exit(0);190} else if (!strcmp(cmd, "--info-path")) {191print_system_path(GIT_INFO_PATH);192trace2_cmd_name("_query_");193exit(0);194} else if (!strcmp(cmd, "-p") || !strcmp(cmd, "--paginate")) {195use_pager = 1;196} else if (!strcmp(cmd, "-P") || !strcmp(cmd, "--no-pager")) {197use_pager = 0;198if (envchanged)199*envchanged = 1;200} else if (!strcmp(cmd, "--no-lazy-fetch")) {201fetch_if_missing = 0;202setenv(NO_LAZY_FETCH_ENVIRONMENT, "1", 1);203if (envchanged)204*envchanged = 1;205} else if (!strcmp(cmd, "--no-replace-objects")) {206disable_replace_refs();207setenv(NO_REPLACE_OBJECTS_ENVIRONMENT, "1", 1);208if (envchanged)209*envchanged = 1;210} else if (!strcmp(cmd, "--git-dir")) {211if (*argc < 2) {212fprintf(stderr, _("no directory given for '%s' option\n" ), "--git-dir");213usage(git_usage_string);214}215setenv(GIT_DIR_ENVIRONMENT, (*argv)[1], 1);216if (envchanged)217*envchanged = 1;218(*argv)++;219(*argc)--;220} else if (skip_prefix(cmd, "--git-dir=", &cmd)) {221setenv(GIT_DIR_ENVIRONMENT, cmd, 1);222if (envchanged)223*envchanged = 1;224} else if (!strcmp(cmd, "--namespace")) {225if (*argc < 2) {226fprintf(stderr, _("no namespace given for --namespace\n" ));227usage(git_usage_string);228}229setenv(GIT_NAMESPACE_ENVIRONMENT, (*argv)[1], 1);230if (envchanged)231*envchanged = 1;232(*argv)++;233(*argc)--;234} else if (skip_prefix(cmd, "--namespace=", &cmd)) {235setenv(GIT_NAMESPACE_ENVIRONMENT, cmd, 1);236if (envchanged)237*envchanged = 1;238} else if (!strcmp(cmd, "--work-tree")) {239if (*argc < 2) {240fprintf(stderr, _("no directory given for '%s' option\n" ), "--work-tree");241usage(git_usage_string);242}243setenv(GIT_WORK_TREE_ENVIRONMENT, (*argv)[1], 1);244if (envchanged)245*envchanged = 1;246(*argv)++;247(*argc)--;248} else if (skip_prefix(cmd, "--work-tree=", &cmd)) {249setenv(GIT_WORK_TREE_ENVIRONMENT, cmd, 1);250if (envchanged)251*envchanged = 1;252} else if (!strcmp(cmd, "--bare")) {253char *cwd = xgetcwd();254is_bare_repository_cfg = 1;255setenv(GIT_DIR_ENVIRONMENT, cwd, 0);256free(cwd);257setenv(GIT_IMPLICIT_WORK_TREE_ENVIRONMENT, "0", 1);258if (envchanged)259*envchanged = 1;260} else if (!strcmp(cmd, "-c")) {261if (*argc < 2) {262fprintf(stderr, _("-c expects a configuration string\n" ));263usage(git_usage_string);264}265git_config_push_parameter((*argv)[1]);266(*argv)++;267(*argc)--;268} else if (!strcmp(cmd, "--config-env")) {269if (*argc < 2) {270fprintf(stderr, _("no config key given for --config-env\n" ));271usage(git_usage_string);272}273git_config_push_env((*argv)[1]);274(*argv)++;275(*argc)--;276} else if (skip_prefix(cmd, "--config-env=", &cmd)) {277git_config_push_env(cmd);278} else if (!strcmp(cmd, "--literal-pathspecs")) {279setenv(GIT_LITERAL_PATHSPECS_ENVIRONMENT, "1", 1);280if (envchanged)281*envchanged = 1;282} else if (!strcmp(cmd, "--no-literal-pathspecs")) {283setenv(GIT_LITERAL_PATHSPECS_ENVIRONMENT, "0", 1);284if (envchanged)285*envchanged = 1;286} else if (!strcmp(cmd, "--glob-pathspecs")) {287setenv(GIT_GLOB_PATHSPECS_ENVIRONMENT, "1", 1);288if (envchanged)289*envchanged = 1;290} else if (!strcmp(cmd, "--noglob-pathspecs")) {291setenv(GIT_NOGLOB_PATHSPECS_ENVIRONMENT, "1", 1);292if (envchanged)293*envchanged = 1;294} else if (!strcmp(cmd, "--icase-pathspecs")) {295setenv(GIT_ICASE_PATHSPECS_ENVIRONMENT, "1", 1);296if (envchanged)297*envchanged = 1;298} else if (!strcmp(cmd, "--no-optional-locks")) {299setenv(GIT_OPTIONAL_LOCKS_ENVIRONMENT, "0", 1);300if (envchanged)301*envchanged = 1;302} else if (!strcmp(cmd, "--shallow-file")) {303(*argv)++;304(*argc)--;305set_alternate_shallow_file(the_repository, (*argv)[0], 1);306if (envchanged)307*envchanged = 1;308} else if (!strcmp(cmd, "-C")) {309if (*argc < 2) {310fprintf(stderr, _("no directory given for '%s' option\n" ), "-C");311usage(git_usage_string);312}313if ((*argv)[1][0]) {314if (chdir((*argv)[1]))315die_errno("cannot change to '%s'", (*argv)[1]);316if (envchanged)317*envchanged = 1;318}319(*argv)++;320(*argc)--;321} else if (skip_prefix(cmd, "--list-cmds=", &cmd)) {322trace2_cmd_name("_query_");323if (!strcmp(cmd, "parseopt")) {324struct string_list list = STRING_LIST_INIT_DUP;325int i;326}364{367int envchanged = 0, ret = 0, saved_errno = errno;368int count, option_count;369const char **new_argv;370const char *alias_command;371char *alias_string;372}443{446int status, help;447struct stat st;448const char *prefix;449int run_setup = (p->option & (RUN_SETUP | RUN_SETUP_GENTLY));450}505{655int i;656for (i = 0; i < ARRAY_SIZE(commands); i++) {657struct cmd_struct *p = commands + i;658if (!strcmp(s, p->cmd))659return p;660}661return NULL;662}663{666return !!get_builtin(s);667}668{671int i;672for (i = 0; i < ARRAY_SIZE(commands); i++) {673if (exclude_option &&674(commands[i].option & exclude_option))675continue;676string_list_append(out, commands[i].cmd);677}678}679{682const char *name;683int i;684* Callers can ask for a subset of the commands based on a certain687* prefix, which is then dropped from the added names. The names in688* the `commands[]` array do not have the `git-` prefix, though,689* therefore we must expect the `prefix` to at least start with `git-`.690*/691if (!skip_prefix(prefix, "git-", &prefix))692BUG("prefix '%s' must start with 'git-'", prefix);693}698{702size_t len;703}707#else708#define strip_extension(cmd)709#endif710{713struct strvec args = STRVEC_INIT;714const char *cmd;715struct cmd_struct *builtin;716}742{745struct child_process cmd = CHILD_PROCESS_INIT;746int status;747* The code in run_command() logs trace2 child_start/child_exit763* events, so we do not need to report exec/exec_result events here.764*/765trace_argv_printf(cmd.args.v, "trace: exec:");766* If we fail because the command is not found, it is769* OK to return. Otherwise, we just pass along the status code,770* or our usual generic code if we were not even able to exec771* the program.772*/773status = run_command(&cmd);774* If the child process ran and we are now going to exit, emit a777* generic string as our trace2 command verb to indicate that we778* launched a dashed command.779*/780if (status >= 0)781exit(status);782else if (errno != ENOENT)783exit(128);784}785{788int done_alias = 0;789struct string_list cmd_list = STRING_LIST_INIT_NODUP;790struct string_list_item *seen;791* If we tried alias and futzed with our environment,795* it no longer is safe to invoke builtins directly in796* general. We have to spawn them as dashed externals.797*798* NEEDSWORK: if we can figure out cases799* where it is safe to do, we can avoid spawning a new800* process.801*/802if (!done_alias)803handle_builtin(*argcp, *argv);804else if (get_builtin(**argv)) {805struct child_process cmd = CHILD_PROCESS_INIT;806int i;807* The current process is committed to launching a810* child process to run the command named in (**argv)811* and exiting. Log a generic string as the trace2812* command verb to indicate this. Note that the child813* process will log the actual verb when it runs.814*/815trace2_cmd_name("_run_git_alias_");816* if we fail because the command is not found, it is827* OK to return. Otherwise, we just pass along the status code.828*/829cmd.silent_exec_failure = 1;830cmd.clean_on_exit = 1;831cmd.wait_after_clean = 1;832cmd.trace2_child_class = "git_alias";833i = run_command(&cmd);834if (i >= 0 || errno != ENOENT)835exit(i);836die("could not execute builtin %s", **argv);837}838* It could be an alias -- this works around the insanity863* of overriding "git log" with "git show" by having864* alias.log = show865*/866if (!handle_alias(argcp, argv))867break;868done_alias = 1;869}870}875{878const char *cmd;879int done_help = 0;880* "git-xxxx" is the same as "git xxxx", but we obviously:894*895* - cannot take flags in between the "git" and the "xxxx".896* - cannot execute it externally (since it would just do897* the same thing over again)898*899* So we just directly call the builtin handler, and die if900* that one cannot handle it.901*/902if (skip_prefix(cmd, "git-", &cmd)) {903argv[0] = cmd;904handle_builtin(argc, argv);905die(_("cannot handle %s as a builtin"), cmd);906}907* We use PATH to find git commands, but we prepend some higher931* precedence paths: the "--exec-path" option, the GIT_EXEC_PATH932* environment, and the $(gitexecdir) from the Makefile at build933* time.934*/935setup_path();936}959