mirror
/
git
mirror of https://git.kernel.org/pub/scm/git/git.git
1
0
Fork 0
Code Releases Activity
git/git.c

959 lines
28 KiB
C
Raw Permalink Blame History

#define USE_THE_REPOSITORY_VARIABLE
#include "builtin.h"
#include "config.h"
#include "environment.h"
#include "exec-cmd.h"
#include "gettext.h"
#include "help.h"
#include "object-file.h"
#include "pager.h"
#include "read-cache-ll.h"
#include "run-command.h"
#include "alias.h"
#include "replace-object.h"
#include "setup.h"
#include "attr.h"
#include "shallow.h"
#include "trace.h"
#include "trace2.h"
#define RUN_SETUP (1<<0)
#define RUN_SETUP_GENTLY (1<<1)
#define USE_PAGER (1<<2)
/*
* require working tree to be present -- anything uses this needs
* RUN_SETUP for reading from the configuration file.
*/
#define NEED_WORK_TREE (1<<3)
#define DELAY_PAGER_CONFIG (1<<4)
#define NO_PARSEOPT (1<<5) /* parse-options is not used */
struct cmd_struct {
const char *cmd;
int (*fn)(int, const char **, const char *);
unsigned int option;
};
const char git_usage_string[] =
N_("git [-v | --version] [-h | --help] [-C <path>] [-c <name>=<value>]\n"
" [--exec-path[=<path>]] [--html-path] [--man-path] [--info-path]\n"
" [-p | --paginate | -P | --no-pager] [--no-replace-objects] [--no-lazy-fetch]\n"
" [--no-optional-locks] [--no-advice] [--bare] [--git-dir=<path>]\n"
" [--work-tree=<path>] [--namespace=<name>] [--config-env=<name>=<envvar>]\n"
" <command> [<args>]");
const char git_more_info_string[] =
N_("'git help -a' and 'git help -g' list available subcommands and some\n"
"concept guides. See 'git help <command>' or 'git help <concept>'\n"
"to read about a specific subcommand or concept.\n"
"See 'git help git' for an overview of the system.");
static int use_pager = -1;
static void list_builtins(struct string_list *list, unsigned int exclude_option);
static void exclude_helpers_from_list(struct string_list *list)
{
int i = 0;
while (i < list->nr) {
if (strstr(list->items[i].string, "--"))
unsorted_string_list_delete_item(list, i, 0);
else
i++;
}
}
static int match_token(const char *spec, int len, const char *token)
{
int token_len = strlen(token);
return len == token_len && !strncmp(spec, token, token_len);
}
static int list_cmds(const char *spec)
{
struct string_list list = STRING_LIST_INIT_DUP;
int i;
int nongit;
/*
* Set up the repository so we can pick up any repo-level config (like
* completion.commands).
*/
setup_git_directory_gently(&nongit);
while (*spec) {
const char *sep = strchrnul(spec, ',');
int len = sep - spec;
if (match_token(spec, len, "builtins"))
list_builtins(&list, 0);
else if (match_token(spec, len, "main"))
list_all_main_cmds(&list);
else if (match_token(spec, len, "others"))
list_all_other_cmds(&list);
else if (match_token(spec, len, "nohelpers"))
exclude_helpers_from_list(&list);
else if (match_token(spec, len, "alias"))
list_aliases(&list);
else if (match_token(spec, len, "config"))
list_cmds_by_config(&list);
else if (len > 5 && !strncmp(spec, "list-", 5)) {
struct strbuf sb = STRBUF_INIT;
strbuf_add(&sb, spec + 5, len - 5);
list_cmds_by_category(&list, sb.buf);
strbuf_release(&sb);
}
else
die(_("unsupported command listing type '%s'"), spec);
spec += len;
if (*spec == ',')
spec++;
}
for (i = 0; i < list.nr; i++)
puts(list.items[i].string);
string_list_clear(&list, 0);
return 0;
}
static void commit_pager_choice(void)
{
switch (use_pager) {
case 0:
setenv("GIT_PAGER", "cat", 1);
break;
case 1:
setup_pager();
break;
default:
break;
}
}
void setup_auto_pager(const char *cmd, int def)
{
if (use_pager != -1 || pager_in_use())
return;
use_pager = check_pager_config(cmd);
if (use_pager == -1)
use_pager = def;
commit_pager_choice();
}
static void print_system_path(const char *path)
{
char *s_path = system_path(path);
puts(s_path);
free(s_path);
}
static int handle_options(const char ***argv, int *argc, int *envchanged)
{
const char **orig_argv = *argv;
while (*argc > 0) {
const char *cmd = (*argv)[0];
if (cmd[0] != '-')
break;
/*
* For legacy reasons, the "version" and "help"
* commands can be written with "--" prepended
* to make them look like flags.
*/
if (!strcmp(cmd, "--help") || !strcmp(cmd, "-h") ||
!strcmp(cmd, "--version") || !strcmp(cmd, "-v"))
break;
/*
* Check remaining flags.
*/
if (skip_prefix(cmd, "--exec-path", &cmd)) {
if (*cmd == '=')
git_set_exec_path(cmd + 1);
else {
puts(git_exec_path());
trace2_cmd_name("_query_");
exit(0);
}
} else if (!strcmp(cmd, "--html-path")) {
print_system_path(GIT_HTML_PATH);
trace2_cmd_name("_query_");
exit(0);
} else if (!strcmp(cmd, "--man-path")) {
print_system_path(GIT_MAN_PATH);
trace2_cmd_name("_query_");
exit(0);
} else if (!strcmp(cmd, "--info-path")) {
print_system_path(GIT_INFO_PATH);
trace2_cmd_name("_query_");
exit(0);
} else if (!strcmp(cmd, "-p") || !strcmp(cmd, "--paginate")) {
use_pager = 1;
} else if (!strcmp(cmd, "-P") || !strcmp(cmd, "--no-pager")) {
use_pager = 0;
if (envchanged)
*envchanged = 1;
} else if (!strcmp(cmd, "--no-lazy-fetch")) {
fetch_if_missing = 0;
setenv(NO_LAZY_FETCH_ENVIRONMENT, "1", 1);
if (envchanged)
*envchanged = 1;
} else if (!strcmp(cmd, "--no-replace-objects")) {
disable_replace_refs();
setenv(NO_REPLACE_OBJECTS_ENVIRONMENT, "1", 1);
if (envchanged)
*envchanged = 1;
} else if (!strcmp(cmd, "--git-dir")) {
if (*argc < 2) {
fprintf(stderr, _("no directory given for '%s' option\n" ), "--git-dir");
usage(git_usage_string);
}
setenv(GIT_DIR_ENVIRONMENT, (*argv)[1], 1);
if (envchanged)
*envchanged = 1;
(*argv)++;
(*argc)--;
} else if (skip_prefix(cmd, "--git-dir=", &cmd)) {
setenv(GIT_DIR_ENVIRONMENT, cmd, 1);
if (envchanged)
*envchanged = 1;
} else if (!strcmp(cmd, "--namespace")) {
if (*argc < 2) {
fprintf(stderr, _("no namespace given for --namespace\n" ));
usage(git_usage_string);
}
setenv(GIT_NAMESPACE_ENVIRONMENT, (*argv)[1], 1);
if (envchanged)
*envchanged = 1;
(*argv)++;
(*argc)--;
} else if (skip_prefix(cmd, "--namespace=", &cmd)) {
setenv(GIT_NAMESPACE_ENVIRONMENT, cmd, 1);
if (envchanged)
*envchanged = 1;
} else if (!strcmp(cmd, "--work-tree")) {
if (*argc < 2) {
fprintf(stderr, _("no directory given for '%s' option\n" ), "--work-tree");
usage(git_usage_string);
}
setenv(GIT_WORK_TREE_ENVIRONMENT, (*argv)[1], 1);
if (envchanged)
*envchanged = 1;
(*argv)++;
(*argc)--;
} else if (skip_prefix(cmd, "--work-tree=", &cmd)) {
setenv(GIT_WORK_TREE_ENVIRONMENT, cmd, 1);
if (envchanged)
*envchanged = 1;
} else if (!strcmp(cmd, "--bare")) {
char *cwd = xgetcwd();
is_bare_repository_cfg = 1;
setenv(GIT_DIR_ENVIRONMENT, cwd, 0);
free(cwd);
setenv(GIT_IMPLICIT_WORK_TREE_ENVIRONMENT, "0", 1);
if (envchanged)
*envchanged = 1;
} else if (!strcmp(cmd, "-c")) {
if (*argc < 2) {
fprintf(stderr, _("-c expects a configuration string\n" ));
usage(git_usage_string);
}
git_config_push_parameter((*argv)[1]);
(*argv)++;
(*argc)--;
} else if (!strcmp(cmd, "--config-env")) {
if (*argc < 2) {
fprintf(stderr, _("no config key given for --config-env\n" ));
usage(git_usage_string);
}
git_config_push_env((*argv)[1]);
(*argv)++;
(*argc)--;
} else if (skip_prefix(cmd, "--config-env=", &cmd)) {
git_config_push_env(cmd);
} else if (!strcmp(cmd, "--literal-pathspecs")) {
setenv(GIT_LITERAL_PATHSPECS_ENVIRONMENT, "1", 1);
if (envchanged)
*envchanged = 1;
} else if (!strcmp(cmd, "--no-literal-pathspecs")) {
setenv(GIT_LITERAL_PATHSPECS_ENVIRONMENT, "0", 1);
if (envchanged)
*envchanged = 1;
} else if (!strcmp(cmd, "--glob-pathspecs")) {
setenv(GIT_GLOB_PATHSPECS_ENVIRONMENT, "1", 1);
if (envchanged)
*envchanged = 1;
} else if (!strcmp(cmd, "--noglob-pathspecs")) {
setenv(GIT_NOGLOB_PATHSPECS_ENVIRONMENT, "1", 1);
if (envchanged)
*envchanged = 1;
} else if (!strcmp(cmd, "--icase-pathspecs")) {
setenv(GIT_ICASE_PATHSPECS_ENVIRONMENT, "1", 1);
if (envchanged)
*envchanged = 1;
} else if (!strcmp(cmd, "--no-optional-locks")) {
setenv(GIT_OPTIONAL_LOCKS_ENVIRONMENT, "0", 1);
if (envchanged)
*envchanged = 1;
} else if (!strcmp(cmd, "--shallow-file")) {
(*argv)++;
(*argc)--;
set_alternate_shallow_file(the_repository, (*argv)[0], 1);
if (envchanged)
*envchanged = 1;
} else if (!strcmp(cmd, "-C")) {
if (*argc < 2) {
fprintf(stderr, _("no directory given for '%s' option\n" ), "-C");
usage(git_usage_string);
}
if ((*argv)[1][0]) {
if (chdir((*argv)[1]))
die_errno("cannot change to '%s'", (*argv)[1]);
if (envchanged)
*envchanged = 1;
}
(*argv)++;
(*argc)--;
} else if (skip_prefix(cmd, "--list-cmds=", &cmd)) {
trace2_cmd_name("_query_");
if (!strcmp(cmd, "parseopt")) {
struct string_list list = STRING_LIST_INIT_DUP;
int i;
list_builtins(&list, NO_PARSEOPT);
for (i = 0; i < list.nr; i++)
printf("%s ", list.items[i].string);
string_list_clear(&list, 0);
exit(0);
} else {
exit(list_cmds(cmd));
}
} else if (!strcmp(cmd, "--attr-source")) {
if (*argc < 2) {
fprintf(stderr, _("no attribute source given for --attr-source\n" ));
usage(git_usage_string);
}
setenv(GIT_ATTR_SOURCE_ENVIRONMENT, (*argv)[1], 1);
if (envchanged)
*envchanged = 1;
(*argv)++;
(*argc)--;
} else if (skip_prefix(cmd, "--attr-source=", &cmd)) {
set_git_attr_source(cmd);
setenv(GIT_ATTR_SOURCE_ENVIRONMENT, cmd, 1);
if (envchanged)
*envchanged = 1;
} else if (!strcmp(cmd, "--no-advice")) {
setenv(GIT_ADVICE_ENVIRONMENT, "0", 1);
if (envchanged)
*envchanged = 1;
} else {
fprintf(stderr, _("unknown option: %s\n"), cmd);
usage(git_usage_string);
}
(*argv)++;
(*argc)--;
}
return (*argv) - orig_argv;
}
static int handle_alias(int *argcp, const char ***argv)
{
int envchanged = 0, ret = 0, saved_errno = errno;
int count, option_count;
const char **new_argv;
const char *alias_command;
char *alias_string;
alias_command = (*argv)[0];
alias_string = alias_lookup(alias_command);
if (alias_string) {
if (*argcp > 1 && !strcmp((*argv)[1], "-h"))
fprintf_ln(stderr, _("'%s' is aliased to '%s'"),
alias_command, alias_string);
if (alias_string[0] == '!') {
struct child_process child = CHILD_PROCESS_INIT;
int nongit_ok;
/* Aliases expect GIT_PREFIX, GIT_DIR etc to be set */
setup_git_directory_gently(&nongit_ok);
commit_pager_choice();
child.use_shell = 1;
child.clean_on_exit = 1;
child.wait_after_clean = 1;
child.trace2_child_class = "shell_alias";
strvec_push(&child.args, alias_string + 1);
strvec_pushv(&child.args, (*argv) + 1);
trace2_cmd_alias(alias_command, child.args.v);
trace2_cmd_name("_run_shell_alias_");
ret = run_command(&child);
if (ret >= 0) /* normal exit */
exit(ret);
die_errno(_("while expanding alias '%s': '%s'"),
alias_command, alias_string + 1);
}
count = split_cmdline(alias_string, &new_argv);
if (count < 0)
die(_("bad alias.%s string: %s"), alias_command,
_(split_cmdline_strerror(count)));
option_count = handle_options(&new_argv, &count, &envchanged);
if (envchanged)
die(_("alias '%s' changes environment variables.\n"
"You can use '!git' in the alias to do this"),
alias_command);
MOVE_ARRAY(new_argv - option_count, new_argv, count);
new_argv -= option_count;
if (count < 1)
die(_("empty alias for %s"), alias_command);
if (!strcmp(alias_command, new_argv[0]))
die(_("recursive alias: %s"), alias_command);
trace_argv_printf(new_argv,
"trace: alias expansion: %s =>",
alias_command);
REALLOC_ARRAY(new_argv, count + *argcp);
/* insert after command name */
COPY_ARRAY(new_argv + count, *argv + 1, *argcp);
trace2_cmd_alias(alias_command, new_argv);
*argv = new_argv;
*argcp += count - 1;
ret = 1;
}
errno = saved_errno;
return ret;
}
static int run_builtin(struct cmd_struct *p, int argc, const char **argv)
{
int status, help;
struct stat st;
const char *prefix;
int run_setup = (p->option & (RUN_SETUP | RUN_SETUP_GENTLY));
help = argc == 2 && !strcmp(argv[1], "-h");
if (help && (run_setup & RUN_SETUP))
/* demote to GENTLY to allow 'git cmd -h' outside repo */
run_setup = RUN_SETUP_GENTLY;
if (run_setup & RUN_SETUP) {
prefix = setup_git_directory();
} else if (run_setup & RUN_SETUP_GENTLY) {
int nongit_ok;
prefix = setup_git_directory_gently(&nongit_ok);
} else {
prefix = NULL;
}
assert(!prefix || *prefix);
precompose_argv_prefix(argc, argv, NULL);
if (use_pager == -1 && run_setup &&
!(p->option & DELAY_PAGER_CONFIG))
use_pager = check_pager_config(p->cmd);
if (use_pager == -1 && p->option & USE_PAGER)
use_pager = 1;
if (run_setup && startup_info->have_repository)
/* get_git_dir() may set up repo, avoid that */
trace_repo_setup();
commit_pager_choice();
if (!help && p->option & NEED_WORK_TREE)
setup_work_tree();
trace_argv_printf(argv, "trace: built-in: git");
trace2_cmd_name(p->cmd);
validate_cache_entries(the_repository->index);
status = p->fn(argc, argv, prefix);
validate_cache_entries(the_repository->index);
if (status)
return status;
/* Somebody closed stdout? */
if (fstat(fileno(stdout), &st))
return 0;
/* Ignore write errors for pipes and sockets.. */
if (S_ISFIFO(st.st_mode) || S_ISSOCK(st.st_mode))
return 0;
/* Check for ENOSPC and EIO errors.. */
if (fflush(stdout))
die_errno(_("write failure on standard output"));
if (ferror(stdout))
die(_("unknown write failure on standard output"));
if (fclose(stdout))
die_errno(_("close failed on standard output"));
return 0;
}
static struct cmd_struct commands[] = {
{ "add", cmd_add, RUN_SETUP | NEED_WORK_TREE },
{ "am", cmd_am, RUN_SETUP | NEED_WORK_TREE },
{ "annotate", cmd_annotate, RUN_SETUP },
{ "apply", cmd_apply, RUN_SETUP_GENTLY },
{ "archive", cmd_archive, RUN_SETUP_GENTLY },
{ "bisect", cmd_bisect, RUN_SETUP },
{ "blame", cmd_blame, RUN_SETUP },
{ "branch", cmd_branch, RUN_SETUP | DELAY_PAGER_CONFIG },
{ "bugreport", cmd_bugreport, RUN_SETUP_GENTLY },
{ "bundle", cmd_bundle, RUN_SETUP_GENTLY },
{ "cat-file", cmd_cat_file, RUN_SETUP },
{ "check-attr", cmd_check_attr, RUN_SETUP },
{ "check-ignore", cmd_check_ignore, RUN_SETUP | NEED_WORK_TREE },
{ "check-mailmap", cmd_check_mailmap, RUN_SETUP },
{ "check-ref-format", cmd_check_ref_format, NO_PARSEOPT },
{ "checkout", cmd_checkout, RUN_SETUP | NEED_WORK_TREE },
{ "checkout--worker", cmd_checkout__worker,
RUN_SETUP | NEED_WORK_TREE },
{ "checkout-index", cmd_checkout_index,
RUN_SETUP | NEED_WORK_TREE},
{ "cherry", cmd_cherry, RUN_SETUP },
{ "cherry-pick", cmd_cherry_pick, RUN_SETUP | NEED_WORK_TREE },
{ "clean", cmd_clean, RUN_SETUP | NEED_WORK_TREE },
{ "clone", cmd_clone },
{ "column", cmd_column, RUN_SETUP_GENTLY },
{ "commit", cmd_commit, RUN_SETUP | NEED_WORK_TREE },
{ "commit-graph", cmd_commit_graph, RUN_SETUP },
{ "commit-tree", cmd_commit_tree, RUN_SETUP },
{ "config", cmd_config, RUN_SETUP_GENTLY | DELAY_PAGER_CONFIG },
{ "count-objects", cmd_count_objects, RUN_SETUP },
{ "credential", cmd_credential, RUN_SETUP_GENTLY | NO_PARSEOPT },
{ "credential-cache", cmd_credential_cache },
{ "credential-cache--daemon", cmd_credential_cache_daemon },
{ "credential-store", cmd_credential_store },
{ "describe", cmd_describe, RUN_SETUP },
{ "diagnose", cmd_diagnose, RUN_SETUP_GENTLY },
{ "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_GENTLY },
{ "fast-export", cmd_fast_export, RUN_SETUP },
{ "fast-import", cmd_fast_import, RUN_SETUP | NO_PARSEOPT },
{ "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 },
{ "for-each-repo", cmd_for_each_repo, RUN_SETUP_GENTLY },
{ "format-patch", cmd_format_patch, RUN_SETUP },
{ "fsck", cmd_fsck, RUN_SETUP },
{ "fsck-objects", cmd_fsck, RUN_SETUP },
{ "fsmonitor--daemon", cmd_fsmonitor__daemon, 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 },
{ "hook", cmd_hook, RUN_SETUP },
{ "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 },
{ "mailsplit", cmd_mailsplit, NO_PARSEOPT },
{ "maintenance", cmd_maintenance, RUN_SETUP },
{ "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 },
{ "mktag", cmd_mktag, RUN_SETUP },
{ "mktree", cmd_mktree, RUN_SETUP },
{ "multi-pack-index", cmd_multi_pack_index, 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 },
{ "rebase", cmd_rebase, RUN_SETUP | NEED_WORK_TREE },
{ "receive-pack", cmd_receive_pack },
{ "reflog", cmd_reflog, RUN_SETUP },
{ "refs", cmd_refs, 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 },
{ "replay", cmd_replay, RUN_SETUP },
{ "rerere", cmd_rerere, RUN_SETUP },
{ "reset", cmd_reset, RUN_SETUP },
{ "restore", cmd_restore, RUN_SETUP | NEED_WORK_TREE },
{ "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 },
{ "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, RUN_SETUP_GENTLY },
{ "show-ref", cmd_show_ref, RUN_SETUP },
{ "sparse-checkout", cmd_sparse_checkout, RUN_SETUP },
{ "stage", cmd_add, RUN_SETUP | NEED_WORK_TREE },
{ "stash", cmd_stash, RUN_SETUP | NEED_WORK_TREE },
{ "status", cmd_status, RUN_SETUP | NEED_WORK_TREE },
{ "stripspace", cmd_stripspace },
{ "submodule--helper", cmd_submodule__helper, RUN_SETUP },
{ "switch", cmd_switch, RUN_SETUP | NEED_WORK_TREE },
{ "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 },
{ "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);
}
}
void load_builtin_commands(const char *prefix, struct cmdnames *cmds)
{
const char *name;
int i;
/*
* Callers can ask for a subset of the commands based on a certain
* prefix, which is then dropped from the added names. The names in
* the `commands[]` array do not have the `git-` prefix, though,
* therefore we must expect the `prefix` to at least start with `git-`.
*/
if (!skip_prefix(prefix, "git-", &prefix))
BUG("prefix '%s' must start with 'git-'", prefix);
for (i = 0; i < ARRAY_SIZE(commands); i++)
if (skip_prefix(commands[i].cmd, prefix, &name))
add_cmdname(cmds, name, strlen(name));
}
#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 strvec args = STRVEC_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++) {
strvec_push(&args, argv[i]);
if (!i)
strvec_push(&args, "--exclude-guides");
}
argc++;
argv = args.v;
}
builtin = get_builtin(cmd);
if (builtin)
exit(run_builtin(builtin, argc, argv));
strvec_clear(&args);
}
static void execv_dashed_external(const char **argv)
{
struct child_process cmd = CHILD_PROCESS_INIT;
int status;
if (use_pager == -1 && !is_builtin(argv[0]))
use_pager = check_pager_config(argv[0]);
commit_pager_choice();
strvec_pushf(&cmd.args, "git-%s", argv[0]);
strvec_pushv(&cmd.args, argv + 1);
cmd.clean_on_exit = 1;
cmd.wait_after_clean = 1;
cmd.silent_exec_failure = 1;
cmd.trace2_child_class = "dashed";
trace2_cmd_name("_run_dashed_");
/*
* The code in run_command() logs trace2 child_start/child_exit
* events, so we do not need to report exec/exec_result events here.
*/
trace_argv_printf(cmd.args.v, "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 the child process ran and we are now going to exit, emit a
* generic string as our trace2 command verb to indicate that we
* launched a dashed command.
*/
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);
else if (get_builtin(**argv)) {
struct child_process cmd = CHILD_PROCESS_INIT;
int i;
/*
* The current process is committed to launching a
* child process to run the command named in (**argv)
* and exiting. Log a generic string as the trace2
* command verb to indicate this. Note that the child
* process will log the actual verb when it runs.
*/
trace2_cmd_name("_run_git_alias_");
commit_pager_choice();
strvec_push(&cmd.args, "git");
for (i = 0; i < *argcp; i++)
strvec_push(&cmd.args, (*argv)[i]);
trace_argv_printf(cmd.args.v, "trace: exec:");
/*
* if we fail because the command is not found, it is
* OK to return. Otherwise, we just pass along the status code.
*/
cmd.silent_exec_failure = 1;
cmd.clean_on_exit = 1;
cmd.wait_after_clean = 1;
cmd.trace2_child_class = "git_alias";
i = run_command(&cmd);
if (i >= 0 || errno != ENOENT)
exit(i);
die("could not execute builtin %s", **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) {
/* 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);
}
if (!strcmp("--version", argv[0]) || !strcmp("-v", argv[0]))
argv[0] = "version";
else if (!strcmp("--help", argv[0]) || !strcmp("-h", argv[0]))
argv[0] = "help";
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;
}
View Git Blame Copy Permalink