mirror of
https://github.com/git/git
synced 2024-08-25 02:35:46 +00:00
![Tim Schumacher](/assets/img/avatar_default.png)
Just printing the command that the user entered is not particularly helpful when trying to find the alias that causes the loop. Print the history of substituted commands to help the user find the offending alias. Mark the entrypoint of the loop with "<==" and the last command (which looped back to the entrypoint) with "==>". Signed-off-by: Tim Schumacher <timschumi@gmx.de> Signed-off-by: Junio C Hamano <gitster@pobox.com>
809 lines
23 KiB
C
809 lines
23 KiB
C
#include "builtin.h"
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#include "config.h"
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#include "exec-cmd.h"
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#include "help.h"
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#include "run-command.h"
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#include "alias.h"
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#define RUN_SETUP (1<<0)
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#define RUN_SETUP_GENTLY (1<<1)
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#define USE_PAGER (1<<2)
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/*
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* require working tree to be present -- anything uses this needs
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* RUN_SETUP for reading from the configuration file.
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*/
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#define NEED_WORK_TREE (1<<3)
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#define SUPPORT_SUPER_PREFIX (1<<4)
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#define DELAY_PAGER_CONFIG (1<<5)
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#define NO_PARSEOPT (1<<6) /* parse-options is not used */
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struct cmd_struct {
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const char *cmd;
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int (*fn)(int, const char **, const char *);
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unsigned int option;
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};
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const char git_usage_string[] =
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N_("git [--version] [--help] [-C <path>] [-c <name>=<value>]\n"
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" [--exec-path[=<path>]] [--html-path] [--man-path] [--info-path]\n"
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" [-p | --paginate | -P | --no-pager] [--no-replace-objects] [--bare]\n"
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" [--git-dir=<path>] [--work-tree=<path>] [--namespace=<name>]\n"
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" <command> [<args>]");
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const char git_more_info_string[] =
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N_("'git help -a' and 'git help -g' list available subcommands and some\n"
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"concept guides. See 'git help <command>' or 'git help <concept>'\n"
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"to read about a specific subcommand or concept.");
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static int use_pager = -1;
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static void list_builtins(struct string_list *list, unsigned int exclude_option);
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static void exclude_helpers_from_list(struct string_list *list)
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{
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int i = 0;
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while (i < list->nr) {
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if (strstr(list->items[i].string, "--"))
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unsorted_string_list_delete_item(list, i, 0);
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else
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i++;
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}
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}
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static int match_token(const char *spec, int len, const char *token)
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{
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int token_len = strlen(token);
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return len == token_len && !strncmp(spec, token, token_len);
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}
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static int list_cmds(const char *spec)
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{
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struct string_list list = STRING_LIST_INIT_DUP;
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int i;
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while (*spec) {
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const char *sep = strchrnul(spec, ',');
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int len = sep - spec;
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if (match_token(spec, len, "builtins"))
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list_builtins(&list, 0);
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else if (match_token(spec, len, "main"))
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list_all_main_cmds(&list);
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else if (match_token(spec, len, "others"))
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list_all_other_cmds(&list);
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else if (match_token(spec, len, "nohelpers"))
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exclude_helpers_from_list(&list);
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else if (match_token(spec, len, "alias"))
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list_aliases(&list);
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else if (match_token(spec, len, "config"))
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list_cmds_by_config(&list);
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else if (len > 5 && !strncmp(spec, "list-", 5)) {
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struct strbuf sb = STRBUF_INIT;
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strbuf_add(&sb, spec + 5, len - 5);
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list_cmds_by_category(&list, sb.buf);
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strbuf_release(&sb);
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}
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else
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die(_("unsupported command listing type '%s'"), spec);
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spec += len;
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if (*spec == ',')
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spec++;
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}
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for (i = 0; i < list.nr; i++)
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puts(list.items[i].string);
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string_list_clear(&list, 0);
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return 0;
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}
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static void commit_pager_choice(void) {
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switch (use_pager) {
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case 0:
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setenv("GIT_PAGER", "cat", 1);
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break;
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case 1:
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setup_pager();
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break;
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default:
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break;
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}
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}
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void setup_auto_pager(const char *cmd, int def)
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{
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if (use_pager != -1 || pager_in_use())
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return;
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use_pager = check_pager_config(cmd);
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if (use_pager == -1)
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use_pager = def;
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commit_pager_choice();
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}
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static int handle_options(const char ***argv, int *argc, int *envchanged)
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{
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const char **orig_argv = *argv;
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while (*argc > 0) {
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const char *cmd = (*argv)[0];
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if (cmd[0] != '-')
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break;
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/*
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* For legacy reasons, the "version" and "help"
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* commands can be written with "--" prepended
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* to make them look like flags.
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*/
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if (!strcmp(cmd, "--help") || !strcmp(cmd, "--version"))
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break;
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/*
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* Check remaining flags.
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*/
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if (skip_prefix(cmd, "--exec-path", &cmd)) {
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if (*cmd == '=')
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git_set_exec_path(cmd + 1);
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else {
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puts(git_exec_path());
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exit(0);
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}
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} else if (!strcmp(cmd, "--html-path")) {
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puts(system_path(GIT_HTML_PATH));
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exit(0);
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} else if (!strcmp(cmd, "--man-path")) {
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puts(system_path(GIT_MAN_PATH));
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exit(0);
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} else if (!strcmp(cmd, "--info-path")) {
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puts(system_path(GIT_INFO_PATH));
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exit(0);
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} else if (!strcmp(cmd, "-p") || !strcmp(cmd, "--paginate")) {
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use_pager = 1;
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} else if (!strcmp(cmd, "-P") || !strcmp(cmd, "--no-pager")) {
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use_pager = 0;
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if (envchanged)
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*envchanged = 1;
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} else if (!strcmp(cmd, "--no-replace-objects")) {
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read_replace_refs = 0;
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setenv(NO_REPLACE_OBJECTS_ENVIRONMENT, "1", 1);
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if (envchanged)
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*envchanged = 1;
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} else if (!strcmp(cmd, "--git-dir")) {
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if (*argc < 2) {
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fprintf(stderr, _("no directory given for --git-dir\n" ));
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usage(git_usage_string);
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}
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setenv(GIT_DIR_ENVIRONMENT, (*argv)[1], 1);
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if (envchanged)
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*envchanged = 1;
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(*argv)++;
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(*argc)--;
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} else if (skip_prefix(cmd, "--git-dir=", &cmd)) {
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setenv(GIT_DIR_ENVIRONMENT, cmd, 1);
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if (envchanged)
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*envchanged = 1;
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} else if (!strcmp(cmd, "--namespace")) {
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if (*argc < 2) {
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fprintf(stderr, _("no namespace given for --namespace\n" ));
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usage(git_usage_string);
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}
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setenv(GIT_NAMESPACE_ENVIRONMENT, (*argv)[1], 1);
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if (envchanged)
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*envchanged = 1;
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(*argv)++;
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(*argc)--;
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} else if (skip_prefix(cmd, "--namespace=", &cmd)) {
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setenv(GIT_NAMESPACE_ENVIRONMENT, cmd, 1);
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if (envchanged)
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*envchanged = 1;
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} else if (!strcmp(cmd, "--work-tree")) {
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if (*argc < 2) {
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fprintf(stderr, _("no directory given for --work-tree\n" ));
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usage(git_usage_string);
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}
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setenv(GIT_WORK_TREE_ENVIRONMENT, (*argv)[1], 1);
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if (envchanged)
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*envchanged = 1;
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(*argv)++;
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(*argc)--;
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} else if (skip_prefix(cmd, "--work-tree=", &cmd)) {
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setenv(GIT_WORK_TREE_ENVIRONMENT, cmd, 1);
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if (envchanged)
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*envchanged = 1;
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} else if (!strcmp(cmd, "--super-prefix")) {
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if (*argc < 2) {
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fprintf(stderr, _("no prefix given for --super-prefix\n" ));
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usage(git_usage_string);
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}
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setenv(GIT_SUPER_PREFIX_ENVIRONMENT, (*argv)[1], 1);
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if (envchanged)
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*envchanged = 1;
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(*argv)++;
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(*argc)--;
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} else if (skip_prefix(cmd, "--super-prefix=", &cmd)) {
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setenv(GIT_SUPER_PREFIX_ENVIRONMENT, cmd, 1);
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if (envchanged)
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*envchanged = 1;
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} else if (!strcmp(cmd, "--bare")) {
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char *cwd = xgetcwd();
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is_bare_repository_cfg = 1;
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setenv(GIT_DIR_ENVIRONMENT, cwd, 0);
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free(cwd);
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setenv(GIT_IMPLICIT_WORK_TREE_ENVIRONMENT, "0", 1);
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if (envchanged)
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*envchanged = 1;
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} else if (!strcmp(cmd, "-c")) {
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if (*argc < 2) {
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fprintf(stderr, _("-c expects a configuration string\n" ));
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usage(git_usage_string);
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}
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git_config_push_parameter((*argv)[1]);
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(*argv)++;
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(*argc)--;
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} else if (!strcmp(cmd, "--literal-pathspecs")) {
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setenv(GIT_LITERAL_PATHSPECS_ENVIRONMENT, "1", 1);
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if (envchanged)
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*envchanged = 1;
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} else if (!strcmp(cmd, "--no-literal-pathspecs")) {
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setenv(GIT_LITERAL_PATHSPECS_ENVIRONMENT, "0", 1);
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if (envchanged)
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*envchanged = 1;
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} else if (!strcmp(cmd, "--glob-pathspecs")) {
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setenv(GIT_GLOB_PATHSPECS_ENVIRONMENT, "1", 1);
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if (envchanged)
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*envchanged = 1;
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} else if (!strcmp(cmd, "--noglob-pathspecs")) {
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setenv(GIT_NOGLOB_PATHSPECS_ENVIRONMENT, "1", 1);
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if (envchanged)
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*envchanged = 1;
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} else if (!strcmp(cmd, "--icase-pathspecs")) {
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setenv(GIT_ICASE_PATHSPECS_ENVIRONMENT, "1", 1);
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if (envchanged)
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*envchanged = 1;
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} else if (!strcmp(cmd, "--no-optional-locks")) {
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setenv(GIT_OPTIONAL_LOCKS_ENVIRONMENT, "0", 1);
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if (envchanged)
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*envchanged = 1;
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} else if (!strcmp(cmd, "--shallow-file")) {
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(*argv)++;
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(*argc)--;
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set_alternate_shallow_file(the_repository, (*argv)[0], 1);
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if (envchanged)
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*envchanged = 1;
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} else if (!strcmp(cmd, "-C")) {
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if (*argc < 2) {
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fprintf(stderr, _("no directory given for -C\n" ));
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usage(git_usage_string);
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}
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if ((*argv)[1][0]) {
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if (chdir((*argv)[1]))
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die_errno("cannot change to '%s'", (*argv)[1]);
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if (envchanged)
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*envchanged = 1;
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}
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(*argv)++;
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(*argc)--;
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} else if (skip_prefix(cmd, "--list-cmds=", &cmd)) {
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if (!strcmp(cmd, "parseopt")) {
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struct string_list list = STRING_LIST_INIT_DUP;
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int i;
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list_builtins(&list, NO_PARSEOPT);
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for (i = 0; i < list.nr; i++)
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printf("%s ", list.items[i].string);
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string_list_clear(&list, 0);
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exit(0);
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} else {
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exit(list_cmds(cmd));
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}
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} else {
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fprintf(stderr, _("unknown option: %s\n"), cmd);
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usage(git_usage_string);
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}
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(*argv)++;
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(*argc)--;
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}
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return (*argv) - orig_argv;
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}
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static int handle_alias(int *argcp, const char ***argv)
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{
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int envchanged = 0, ret = 0, saved_errno = errno;
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int count, option_count;
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const char **new_argv;
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const char *alias_command;
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char *alias_string;
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alias_command = (*argv)[0];
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alias_string = alias_lookup(alias_command);
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if (alias_string) {
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if (alias_string[0] == '!') {
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struct child_process child = CHILD_PROCESS_INIT;
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int nongit_ok;
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/* Aliases expect GIT_PREFIX, GIT_DIR etc to be set */
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setup_git_directory_gently(&nongit_ok);
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commit_pager_choice();
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child.use_shell = 1;
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argv_array_push(&child.args, alias_string + 1);
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argv_array_pushv(&child.args, (*argv) + 1);
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ret = run_command(&child);
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if (ret >= 0) /* normal exit */
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exit(ret);
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die_errno("while expanding alias '%s': '%s'",
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alias_command, alias_string + 1);
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}
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count = split_cmdline(alias_string, &new_argv);
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if (count < 0)
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die("Bad alias.%s string: %s", alias_command,
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split_cmdline_strerror(count));
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option_count = handle_options(&new_argv, &count, &envchanged);
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if (envchanged)
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die("alias '%s' changes environment variables.\n"
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"You can use '!git' in the alias to do this",
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alias_command);
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memmove(new_argv - option_count, new_argv,
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count * sizeof(char *));
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new_argv -= option_count;
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if (count < 1)
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die("empty alias for %s", alias_command);
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if (!strcmp(alias_command, new_argv[0]))
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die("recursive alias: %s", alias_command);
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trace_argv_printf(new_argv,
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"trace: alias expansion: %s =>",
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alias_command);
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REALLOC_ARRAY(new_argv, count + *argcp);
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/* insert after command name */
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memcpy(new_argv + count, *argv + 1, sizeof(char *) * *argcp);
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*argv = new_argv;
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*argcp += count - 1;
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ret = 1;
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}
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errno = saved_errno;
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return ret;
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}
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static int run_builtin(struct cmd_struct *p, int argc, const char **argv)
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{
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int status, help;
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struct stat st;
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const char *prefix;
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prefix = NULL;
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help = argc == 2 && !strcmp(argv[1], "-h");
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if (!help) {
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if (p->option & RUN_SETUP)
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prefix = setup_git_directory();
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else if (p->option & RUN_SETUP_GENTLY) {
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int nongit_ok;
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prefix = setup_git_directory_gently(&nongit_ok);
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}
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if (use_pager == -1 && p->option & (RUN_SETUP | RUN_SETUP_GENTLY) &&
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!(p->option & DELAY_PAGER_CONFIG))
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use_pager = check_pager_config(p->cmd);
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if (use_pager == -1 && p->option & USE_PAGER)
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use_pager = 1;
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if ((p->option & (RUN_SETUP | RUN_SETUP_GENTLY)) &&
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startup_info->have_repository) /* get_git_dir() may set up repo, avoid that */
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trace_repo_setup(prefix);
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}
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commit_pager_choice();
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if (!help && get_super_prefix()) {
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if (!(p->option & SUPPORT_SUPER_PREFIX))
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die("%s doesn't support --super-prefix", p->cmd);
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}
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if (!help && p->option & NEED_WORK_TREE)
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setup_work_tree();
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trace_argv_printf(argv, "trace: built-in: git");
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validate_cache_entries(&the_index);
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status = p->fn(argc, argv, prefix);
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validate_cache_entries(&the_index);
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if (status)
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return status;
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/* Somebody closed stdout? */
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if (fstat(fileno(stdout), &st))
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return 0;
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/* Ignore write errors for pipes and sockets.. */
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if (S_ISFIFO(st.st_mode) || S_ISSOCK(st.st_mode))
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return 0;
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/* Check for ENOSPC and EIO errors.. */
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if (fflush(stdout))
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die_errno("write failure on standard output");
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if (ferror(stdout))
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die("unknown write failure on standard output");
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if (fclose(stdout))
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die_errno("close failed on standard output");
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return 0;
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}
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static struct cmd_struct commands[] = {
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{ "add", cmd_add, RUN_SETUP | NEED_WORK_TREE },
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{ "am", cmd_am, RUN_SETUP | NEED_WORK_TREE },
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{ "annotate", cmd_annotate, RUN_SETUP | NO_PARSEOPT },
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{ "apply", cmd_apply, RUN_SETUP_GENTLY },
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{ "archive", cmd_archive, RUN_SETUP_GENTLY },
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{ "bisect--helper", cmd_bisect__helper, RUN_SETUP },
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{ "blame", cmd_blame, RUN_SETUP },
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{ "branch", cmd_branch, RUN_SETUP | DELAY_PAGER_CONFIG },
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{ "bundle", cmd_bundle, RUN_SETUP_GENTLY | NO_PARSEOPT },
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{ "cat-file", cmd_cat_file, RUN_SETUP },
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{ "check-attr", cmd_check_attr, RUN_SETUP },
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{ "check-ignore", cmd_check_ignore, RUN_SETUP | NEED_WORK_TREE },
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{ "check-mailmap", cmd_check_mailmap, RUN_SETUP },
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{ "check-ref-format", cmd_check_ref_format, NO_PARSEOPT },
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{ "checkout", cmd_checkout, RUN_SETUP | NEED_WORK_TREE },
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{ "checkout-index", cmd_checkout_index,
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RUN_SETUP | NEED_WORK_TREE},
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{ "cherry", cmd_cherry, RUN_SETUP },
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{ "cherry-pick", cmd_cherry_pick, RUN_SETUP | NEED_WORK_TREE },
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{ "clean", cmd_clean, RUN_SETUP | NEED_WORK_TREE },
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{ "clone", cmd_clone },
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{ "column", cmd_column, RUN_SETUP_GENTLY },
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{ "commit", cmd_commit, RUN_SETUP | NEED_WORK_TREE },
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{ "commit-graph", cmd_commit_graph, RUN_SETUP },
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{ "commit-tree", cmd_commit_tree, RUN_SETUP | NO_PARSEOPT },
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{ "config", cmd_config, RUN_SETUP_GENTLY | DELAY_PAGER_CONFIG },
|
|
{ "count-objects", cmd_count_objects, RUN_SETUP },
|
|
{ "credential", cmd_credential, RUN_SETUP_GENTLY | NO_PARSEOPT },
|
|
{ "describe", cmd_describe, RUN_SETUP },
|
|
{ "diff", cmd_diff, NO_PARSEOPT },
|
|
{ "diff-files", cmd_diff_files, RUN_SETUP | NEED_WORK_TREE | NO_PARSEOPT },
|
|
{ "diff-index", cmd_diff_index, RUN_SETUP | NO_PARSEOPT },
|
|
{ "diff-tree", cmd_diff_tree, RUN_SETUP | NO_PARSEOPT },
|
|
{ "difftool", cmd_difftool, RUN_SETUP | NEED_WORK_TREE },
|
|
{ "fast-export", cmd_fast_export, RUN_SETUP },
|
|
{ "fetch", cmd_fetch, RUN_SETUP },
|
|
{ "fetch-pack", cmd_fetch_pack, RUN_SETUP | NO_PARSEOPT },
|
|
{ "fmt-merge-msg", cmd_fmt_merge_msg, RUN_SETUP },
|
|
{ "for-each-ref", cmd_for_each_ref, RUN_SETUP },
|
|
{ "format-patch", cmd_format_patch, RUN_SETUP },
|
|
{ "fsck", cmd_fsck, RUN_SETUP },
|
|
{ "fsck-objects", cmd_fsck, RUN_SETUP },
|
|
{ "gc", cmd_gc, RUN_SETUP },
|
|
{ "get-tar-commit-id", cmd_get_tar_commit_id, NO_PARSEOPT },
|
|
{ "grep", cmd_grep, RUN_SETUP_GENTLY },
|
|
{ "hash-object", cmd_hash_object },
|
|
{ "help", cmd_help },
|
|
{ "index-pack", cmd_index_pack, RUN_SETUP_GENTLY | NO_PARSEOPT },
|
|
{ "init", cmd_init_db },
|
|
{ "init-db", cmd_init_db },
|
|
{ "interpret-trailers", cmd_interpret_trailers, RUN_SETUP_GENTLY },
|
|
{ "log", cmd_log, RUN_SETUP },
|
|
{ "ls-files", cmd_ls_files, RUN_SETUP },
|
|
{ "ls-remote", cmd_ls_remote, RUN_SETUP_GENTLY },
|
|
{ "ls-tree", cmd_ls_tree, RUN_SETUP },
|
|
{ "mailinfo", cmd_mailinfo, RUN_SETUP_GENTLY | NO_PARSEOPT },
|
|
{ "mailsplit", cmd_mailsplit, NO_PARSEOPT },
|
|
{ "merge", cmd_merge, RUN_SETUP | NEED_WORK_TREE },
|
|
{ "merge-base", cmd_merge_base, RUN_SETUP },
|
|
{ "merge-file", cmd_merge_file, RUN_SETUP_GENTLY },
|
|
{ "merge-index", cmd_merge_index, RUN_SETUP | NO_PARSEOPT },
|
|
{ "merge-ours", cmd_merge_ours, RUN_SETUP | NO_PARSEOPT },
|
|
{ "merge-recursive", cmd_merge_recursive, RUN_SETUP | NEED_WORK_TREE | NO_PARSEOPT },
|
|
{ "merge-recursive-ours", cmd_merge_recursive, RUN_SETUP | NEED_WORK_TREE | NO_PARSEOPT },
|
|
{ "merge-recursive-theirs", cmd_merge_recursive, RUN_SETUP | NEED_WORK_TREE | NO_PARSEOPT },
|
|
{ "merge-subtree", cmd_merge_recursive, RUN_SETUP | NEED_WORK_TREE | NO_PARSEOPT },
|
|
{ "merge-tree", cmd_merge_tree, RUN_SETUP | NO_PARSEOPT },
|
|
{ "mktag", cmd_mktag, RUN_SETUP | NO_PARSEOPT },
|
|
{ "mktree", cmd_mktree, RUN_SETUP },
|
|
{ "mv", cmd_mv, RUN_SETUP | NEED_WORK_TREE },
|
|
{ "name-rev", cmd_name_rev, RUN_SETUP },
|
|
{ "notes", cmd_notes, RUN_SETUP },
|
|
{ "pack-objects", cmd_pack_objects, RUN_SETUP },
|
|
{ "pack-redundant", cmd_pack_redundant, RUN_SETUP | NO_PARSEOPT },
|
|
{ "pack-refs", cmd_pack_refs, RUN_SETUP },
|
|
{ "patch-id", cmd_patch_id, RUN_SETUP_GENTLY | NO_PARSEOPT },
|
|
{ "pickaxe", cmd_blame, RUN_SETUP },
|
|
{ "prune", cmd_prune, RUN_SETUP },
|
|
{ "prune-packed", cmd_prune_packed, RUN_SETUP },
|
|
{ "pull", cmd_pull, RUN_SETUP | NEED_WORK_TREE },
|
|
{ "push", cmd_push, RUN_SETUP },
|
|
{ "range-diff", cmd_range_diff, RUN_SETUP | USE_PAGER },
|
|
{ "read-tree", cmd_read_tree, RUN_SETUP | SUPPORT_SUPER_PREFIX},
|
|
{ "rebase--helper", cmd_rebase__helper, RUN_SETUP | NEED_WORK_TREE },
|
|
{ "receive-pack", cmd_receive_pack },
|
|
{ "reflog", cmd_reflog, RUN_SETUP },
|
|
{ "remote", cmd_remote, RUN_SETUP },
|
|
{ "remote-ext", cmd_remote_ext, NO_PARSEOPT },
|
|
{ "remote-fd", cmd_remote_fd, NO_PARSEOPT },
|
|
{ "repack", cmd_repack, RUN_SETUP },
|
|
{ "replace", cmd_replace, RUN_SETUP },
|
|
{ "rerere", cmd_rerere, RUN_SETUP },
|
|
{ "reset", cmd_reset, RUN_SETUP },
|
|
{ "rev-list", cmd_rev_list, RUN_SETUP | NO_PARSEOPT },
|
|
{ "rev-parse", cmd_rev_parse, NO_PARSEOPT },
|
|
{ "revert", cmd_revert, RUN_SETUP | NEED_WORK_TREE },
|
|
{ "rm", cmd_rm, RUN_SETUP },
|
|
{ "send-pack", cmd_send_pack, RUN_SETUP },
|
|
{ "serve", cmd_serve, RUN_SETUP },
|
|
{ "shortlog", cmd_shortlog, RUN_SETUP_GENTLY | USE_PAGER },
|
|
{ "show", cmd_show, RUN_SETUP },
|
|
{ "show-branch", cmd_show_branch, RUN_SETUP },
|
|
{ "show-index", cmd_show_index },
|
|
{ "show-ref", cmd_show_ref, RUN_SETUP },
|
|
{ "stage", cmd_add, RUN_SETUP | NEED_WORK_TREE },
|
|
{ "status", cmd_status, RUN_SETUP | NEED_WORK_TREE },
|
|
{ "stripspace", cmd_stripspace },
|
|
{ "submodule--helper", cmd_submodule__helper, RUN_SETUP | SUPPORT_SUPER_PREFIX | NO_PARSEOPT },
|
|
{ "symbolic-ref", cmd_symbolic_ref, RUN_SETUP },
|
|
{ "tag", cmd_tag, RUN_SETUP | DELAY_PAGER_CONFIG },
|
|
{ "unpack-file", cmd_unpack_file, RUN_SETUP | NO_PARSEOPT },
|
|
{ "unpack-objects", cmd_unpack_objects, RUN_SETUP | NO_PARSEOPT },
|
|
{ "update-index", cmd_update_index, RUN_SETUP },
|
|
{ "update-ref", cmd_update_ref, RUN_SETUP },
|
|
{ "update-server-info", cmd_update_server_info, RUN_SETUP },
|
|
{ "upload-archive", cmd_upload_archive, NO_PARSEOPT },
|
|
{ "upload-archive--writer", cmd_upload_archive_writer, NO_PARSEOPT },
|
|
{ "upload-pack", cmd_upload_pack },
|
|
{ "var", cmd_var, RUN_SETUP_GENTLY | NO_PARSEOPT },
|
|
{ "verify-commit", cmd_verify_commit, RUN_SETUP },
|
|
{ "verify-pack", cmd_verify_pack },
|
|
{ "verify-tag", cmd_verify_tag, RUN_SETUP },
|
|
{ "version", cmd_version },
|
|
{ "whatchanged", cmd_whatchanged, RUN_SETUP },
|
|
{ "worktree", cmd_worktree, RUN_SETUP | NO_PARSEOPT },
|
|
{ "write-tree", cmd_write_tree, RUN_SETUP },
|
|
};
|
|
|
|
static struct cmd_struct *get_builtin(const char *s)
|
|
{
|
|
int i;
|
|
for (i = 0; i < ARRAY_SIZE(commands); i++) {
|
|
struct cmd_struct *p = commands + i;
|
|
if (!strcmp(s, p->cmd))
|
|
return p;
|
|
}
|
|
return NULL;
|
|
}
|
|
|
|
int is_builtin(const char *s)
|
|
{
|
|
return !!get_builtin(s);
|
|
}
|
|
|
|
static void list_builtins(struct string_list *out, unsigned int exclude_option)
|
|
{
|
|
int i;
|
|
for (i = 0; i < ARRAY_SIZE(commands); i++) {
|
|
if (exclude_option &&
|
|
(commands[i].option & exclude_option))
|
|
continue;
|
|
string_list_append(out, commands[i].cmd);
|
|
}
|
|
}
|
|
|
|
#ifdef STRIP_EXTENSION
|
|
static void strip_extension(const char **argv)
|
|
{
|
|
size_t len;
|
|
|
|
if (strip_suffix(argv[0], STRIP_EXTENSION, &len))
|
|
argv[0] = xmemdupz(argv[0], len);
|
|
}
|
|
#else
|
|
#define strip_extension(cmd)
|
|
#endif
|
|
|
|
static void handle_builtin(int argc, const char **argv)
|
|
{
|
|
struct argv_array args = ARGV_ARRAY_INIT;
|
|
const char *cmd;
|
|
struct cmd_struct *builtin;
|
|
|
|
strip_extension(argv);
|
|
cmd = argv[0];
|
|
|
|
/* Turn "git cmd --help" into "git help --exclude-guides cmd" */
|
|
if (argc > 1 && !strcmp(argv[1], "--help")) {
|
|
int i;
|
|
|
|
argv[1] = argv[0];
|
|
argv[0] = cmd = "help";
|
|
|
|
for (i = 0; i < argc; i++) {
|
|
argv_array_push(&args, argv[i]);
|
|
if (!i)
|
|
argv_array_push(&args, "--exclude-guides");
|
|
}
|
|
|
|
argc++;
|
|
argv = args.argv;
|
|
}
|
|
|
|
builtin = get_builtin(cmd);
|
|
if (builtin)
|
|
exit(run_builtin(builtin, argc, argv));
|
|
argv_array_clear(&args);
|
|
}
|
|
|
|
static void execv_dashed_external(const char **argv)
|
|
{
|
|
struct child_process cmd = CHILD_PROCESS_INIT;
|
|
int status;
|
|
|
|
if (get_super_prefix())
|
|
die("%s doesn't support --super-prefix", argv[0]);
|
|
|
|
if (use_pager == -1 && !is_builtin(argv[0]))
|
|
use_pager = check_pager_config(argv[0]);
|
|
commit_pager_choice();
|
|
|
|
argv_array_pushf(&cmd.args, "git-%s", argv[0]);
|
|
argv_array_pushv(&cmd.args, argv + 1);
|
|
cmd.clean_on_exit = 1;
|
|
cmd.wait_after_clean = 1;
|
|
cmd.silent_exec_failure = 1;
|
|
|
|
trace_argv_printf(cmd.args.argv, "trace: exec:");
|
|
|
|
/*
|
|
* If we fail because the command is not found, it is
|
|
* OK to return. Otherwise, we just pass along the status code,
|
|
* or our usual generic code if we were not even able to exec
|
|
* the program.
|
|
*/
|
|
status = run_command(&cmd);
|
|
if (status >= 0)
|
|
exit(status);
|
|
else if (errno != ENOENT)
|
|
exit(128);
|
|
}
|
|
|
|
static int run_argv(int *argcp, const char ***argv)
|
|
{
|
|
int done_alias = 0;
|
|
struct string_list cmd_list = STRING_LIST_INIT_NODUP;
|
|
struct string_list_item *seen;
|
|
|
|
while (1) {
|
|
/*
|
|
* If we tried alias and futzed with our environment,
|
|
* it no longer is safe to invoke builtins directly in
|
|
* general. We have to spawn them as dashed externals.
|
|
*
|
|
* NEEDSWORK: if we can figure out cases
|
|
* where it is safe to do, we can avoid spawning a new
|
|
* process.
|
|
*/
|
|
if (!done_alias)
|
|
handle_builtin(*argcp, *argv);
|
|
|
|
/* .. then try the external ones */
|
|
execv_dashed_external(*argv);
|
|
|
|
seen = unsorted_string_list_lookup(&cmd_list, *argv[0]);
|
|
if (seen) {
|
|
int i;
|
|
struct strbuf sb = STRBUF_INIT;
|
|
for (i = 0; i < cmd_list.nr; i++) {
|
|
struct string_list_item *item = &cmd_list.items[i];
|
|
|
|
strbuf_addf(&sb, "\n %s", item->string);
|
|
if (item == seen)
|
|
strbuf_addstr(&sb, " <==");
|
|
else if (i == cmd_list.nr - 1)
|
|
strbuf_addstr(&sb, " ==>");
|
|
}
|
|
die(_("alias loop detected: expansion of '%s' does"
|
|
" not terminate:%s"), cmd_list.items[0].string, sb.buf);
|
|
}
|
|
|
|
string_list_append(&cmd_list, *argv[0]);
|
|
|
|
/*
|
|
* It could be an alias -- this works around the insanity
|
|
* of overriding "git log" with "git show" by having
|
|
* alias.log = show
|
|
*/
|
|
if (!handle_alias(argcp, argv))
|
|
break;
|
|
done_alias = 1;
|
|
}
|
|
|
|
string_list_clear(&cmd_list, 0);
|
|
|
|
return done_alias;
|
|
}
|
|
|
|
int cmd_main(int argc, const char **argv)
|
|
{
|
|
const char *cmd;
|
|
int done_help = 0;
|
|
|
|
cmd = argv[0];
|
|
if (!cmd)
|
|
cmd = "git-help";
|
|
else {
|
|
const char *slash = find_last_dir_sep(cmd);
|
|
if (slash)
|
|
cmd = slash + 1;
|
|
}
|
|
|
|
trace_command_performance(argv);
|
|
|
|
/*
|
|
* "git-xxxx" is the same as "git xxxx", but we obviously:
|
|
*
|
|
* - cannot take flags in between the "git" and the "xxxx".
|
|
* - cannot execute it externally (since it would just do
|
|
* the same thing over again)
|
|
*
|
|
* So we just directly call the builtin handler, and die if
|
|
* that one cannot handle it.
|
|
*/
|
|
if (skip_prefix(cmd, "git-", &cmd)) {
|
|
argv[0] = cmd;
|
|
handle_builtin(argc, argv);
|
|
die("cannot handle %s as a builtin", cmd);
|
|
}
|
|
|
|
/* Look for flags.. */
|
|
argv++;
|
|
argc--;
|
|
handle_options(&argv, &argc, NULL);
|
|
if (argc > 0) {
|
|
/* translate --help and --version into commands */
|
|
skip_prefix(argv[0], "--", &argv[0]);
|
|
} else {
|
|
/* The user didn't specify a command; give them help */
|
|
commit_pager_choice();
|
|
printf("usage: %s\n\n", git_usage_string);
|
|
list_common_cmds_help();
|
|
printf("\n%s\n", _(git_more_info_string));
|
|
exit(1);
|
|
}
|
|
cmd = argv[0];
|
|
|
|
/*
|
|
* We use PATH to find git commands, but we prepend some higher
|
|
* precedence paths: the "--exec-path" option, the GIT_EXEC_PATH
|
|
* environment, and the $(gitexecdir) from the Makefile at build
|
|
* time.
|
|
*/
|
|
setup_path();
|
|
|
|
while (1) {
|
|
int was_alias = run_argv(&argc, &argv);
|
|
if (errno != ENOENT)
|
|
break;
|
|
if (was_alias) {
|
|
fprintf(stderr, _("expansion of alias '%s' failed; "
|
|
"'%s' is not a git command\n"),
|
|
cmd, argv[0]);
|
|
exit(1);
|
|
}
|
|
if (!done_help) {
|
|
cmd = argv[0] = help_unknown_cmd(cmd);
|
|
done_help = 1;
|
|
} else
|
|
break;
|
|
}
|
|
|
|
fprintf(stderr, _("failed to run command '%s': %s\n"),
|
|
cmd, strerror(errno));
|
|
|
|
return 1;
|
|
}
|