mirror of
https://github.com/git/git
synced 2024-08-25 02:35:46 +00:00
![Jeff King](/assets/img/avatar_default.png)
This is setup that should be done in every program for safety, but we never got around to adding it everywhere (so builtins benefited from the call in git.c, but any external commands did not). Putting it in the common main() gives us this safety everywhere. Note that the case in daemon.c is a little funny. We wait until we know whether we want to daemonize, and then either: - call daemonize(), which will close stdio and reopen it to /dev/null under the hood - sanitize_stdfds(), to fix up any odd cases But that is way too late; the point of sanitizing is to give us reliable descriptors on 0/1/2, and we will already have executed code, possibly called die(), etc. The sanitizing should be the very first thing that happens. With this patch, git-daemon will sanitize first, and can remove the call in the non-daemonize case. It does mean that daemonize() may just end up closing the descriptors we opened, but that's not a big deal (it's not wrong to do so, nor is it really less optimal than the case where our parent process redirected us from /dev/null ahead of time). Signed-off-by: Jeff King <peff@peff.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
711 lines
20 KiB
C
711 lines
20 KiB
C
#include "builtin.h"
|
|
#include "exec_cmd.h"
|
|
#include "help.h"
|
|
#include "run-command.h"
|
|
|
|
const char git_usage_string[] =
|
|
"git [--version] [--help] [-C <path>] [-c name=value]\n"
|
|
" [--exec-path[=<path>]] [--html-path] [--man-path] [--info-path]\n"
|
|
" [-p | --paginate | --no-pager] [--no-replace-objects] [--bare]\n"
|
|
" [--git-dir=<path>] [--work-tree=<path>] [--namespace=<name>]\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.");
|
|
|
|
static int use_pager = -1;
|
|
static char *orig_cwd;
|
|
static const char *env_names[] = {
|
|
GIT_DIR_ENVIRONMENT,
|
|
GIT_WORK_TREE_ENVIRONMENT,
|
|
GIT_IMPLICIT_WORK_TREE_ENVIRONMENT,
|
|
GIT_PREFIX_ENVIRONMENT
|
|
};
|
|
static char *orig_env[4];
|
|
static int save_restore_env_balance;
|
|
|
|
static void save_env_before_alias(void)
|
|
{
|
|
int i;
|
|
|
|
assert(save_restore_env_balance == 0);
|
|
save_restore_env_balance = 1;
|
|
orig_cwd = xgetcwd();
|
|
for (i = 0; i < ARRAY_SIZE(env_names); i++) {
|
|
orig_env[i] = getenv(env_names[i]);
|
|
if (orig_env[i])
|
|
orig_env[i] = xstrdup(orig_env[i]);
|
|
}
|
|
}
|
|
|
|
static void restore_env(int external_alias)
|
|
{
|
|
int i;
|
|
|
|
assert(save_restore_env_balance == 1);
|
|
save_restore_env_balance = 0;
|
|
if (!external_alias && orig_cwd && chdir(orig_cwd))
|
|
die_errno("could not move to %s", orig_cwd);
|
|
free(orig_cwd);
|
|
for (i = 0; i < ARRAY_SIZE(env_names); i++) {
|
|
if (external_alias &&
|
|
!strcmp(env_names[i], GIT_PREFIX_ENVIRONMENT))
|
|
continue;
|
|
if (orig_env[i]) {
|
|
setenv(env_names[i], orig_env[i], 1);
|
|
free(orig_env[i]);
|
|
} else {
|
|
unsetenv(env_names[i]);
|
|
}
|
|
}
|
|
}
|
|
|
|
static void commit_pager_choice(void) {
|
|
switch (use_pager) {
|
|
case 0:
|
|
setenv("GIT_PAGER", "cat", 1);
|
|
break;
|
|
case 1:
|
|
setup_pager();
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
}
|
|
|
|
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, "--version"))
|
|
break;
|
|
|
|
/*
|
|
* Check remaining flags.
|
|
*/
|
|
if (skip_prefix(cmd, "--exec-path", &cmd)) {
|
|
if (*cmd == '=')
|
|
git_set_argv_exec_path(cmd + 1);
|
|
else {
|
|
puts(git_exec_path());
|
|
exit(0);
|
|
}
|
|
} else if (!strcmp(cmd, "--html-path")) {
|
|
puts(system_path(GIT_HTML_PATH));
|
|
exit(0);
|
|
} else if (!strcmp(cmd, "--man-path")) {
|
|
puts(system_path(GIT_MAN_PATH));
|
|
exit(0);
|
|
} else if (!strcmp(cmd, "--info-path")) {
|
|
puts(system_path(GIT_INFO_PATH));
|
|
exit(0);
|
|
} else if (!strcmp(cmd, "-p") || !strcmp(cmd, "--paginate")) {
|
|
use_pager = 1;
|
|
} else if (!strcmp(cmd, "--no-pager")) {
|
|
use_pager = 0;
|
|
if (envchanged)
|
|
*envchanged = 1;
|
|
} else if (!strcmp(cmd, "--no-replace-objects")) {
|
|
check_replace_refs = 0;
|
|
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 --git-dir.\n" );
|
|
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 --work-tree.\n" );
|
|
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, "--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, "--shallow-file")) {
|
|
(*argv)++;
|
|
(*argc)--;
|
|
set_alternate_shallow_file((*argv)[0], 1);
|
|
if (envchanged)
|
|
*envchanged = 1;
|
|
} else if (!strcmp(cmd, "-C")) {
|
|
if (*argc < 2) {
|
|
fprintf(stderr, "No directory given for -C.\n" );
|
|
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 {
|
|
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;
|
|
int unused_nongit;
|
|
|
|
save_env_before_alias();
|
|
setup_git_directory_gently(&unused_nongit);
|
|
|
|
alias_command = (*argv)[0];
|
|
alias_string = alias_lookup(alias_command);
|
|
if (alias_string) {
|
|
if (alias_string[0] == '!') {
|
|
struct child_process child = CHILD_PROCESS_INIT;
|
|
|
|
commit_pager_choice();
|
|
restore_env(1);
|
|
|
|
child.use_shell = 1;
|
|
argv_array_push(&child.args, alias_string + 1);
|
|
argv_array_pushv(&child.args, (*argv) + 1);
|
|
|
|
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);
|
|
memmove(new_argv - option_count, new_argv,
|
|
count * sizeof(char *));
|
|
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 */
|
|
memcpy(new_argv + count, *argv + 1, sizeof(char *) * *argcp);
|
|
|
|
*argv = new_argv;
|
|
*argcp += count - 1;
|
|
|
|
ret = 1;
|
|
}
|
|
|
|
restore_env(0);
|
|
|
|
errno = saved_errno;
|
|
|
|
return ret;
|
|
}
|
|
|
|
#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)
|
|
|
|
struct cmd_struct {
|
|
const char *cmd;
|
|
int (*fn)(int, const char **, const char *);
|
|
int option;
|
|
};
|
|
|
|
static int run_builtin(struct cmd_struct *p, int argc, const char **argv)
|
|
{
|
|
int status, help;
|
|
struct stat st;
|
|
const char *prefix;
|
|
|
|
prefix = NULL;
|
|
help = argc == 2 && !strcmp(argv[1], "-h");
|
|
if (!help) {
|
|
if (p->option & RUN_SETUP)
|
|
prefix = setup_git_directory();
|
|
else if (p->option & RUN_SETUP_GENTLY) {
|
|
int nongit_ok;
|
|
prefix = setup_git_directory_gently(&nongit_ok);
|
|
}
|
|
|
|
if (use_pager == -1 && p->option & (RUN_SETUP | RUN_SETUP_GENTLY))
|
|
use_pager = check_pager_config(p->cmd);
|
|
if (use_pager == -1 && p->option & USE_PAGER)
|
|
use_pager = 1;
|
|
|
|
if ((p->option & (RUN_SETUP | RUN_SETUP_GENTLY)) &&
|
|
startup_info->have_repository) /* get_git_dir() may set up repo, avoid that */
|
|
trace_repo_setup(prefix);
|
|
}
|
|
commit_pager_choice();
|
|
|
|
if (!help && p->option & NEED_WORK_TREE)
|
|
setup_work_tree();
|
|
|
|
trace_argv_printf(argv, "trace: built-in: git");
|
|
|
|
status = p->fn(argc, argv, prefix);
|
|
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 },
|
|
{ "bisect--helper", cmd_bisect__helper, RUN_SETUP },
|
|
{ "blame", cmd_blame, RUN_SETUP },
|
|
{ "branch", cmd_branch, RUN_SETUP },
|
|
{ "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 },
|
|
{ "checkout", cmd_checkout, 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-tree", cmd_commit_tree, RUN_SETUP },
|
|
{ "config", cmd_config, RUN_SETUP_GENTLY },
|
|
{ "count-objects", cmd_count_objects, RUN_SETUP },
|
|
{ "credential", cmd_credential, RUN_SETUP_GENTLY },
|
|
{ "describe", cmd_describe, RUN_SETUP },
|
|
{ "diff", cmd_diff },
|
|
{ "diff-files", cmd_diff_files, RUN_SETUP | NEED_WORK_TREE },
|
|
{ "diff-index", cmd_diff_index, RUN_SETUP },
|
|
{ "diff-tree", cmd_diff_tree, RUN_SETUP },
|
|
{ "fast-export", cmd_fast_export, RUN_SETUP },
|
|
{ "fetch", cmd_fetch, RUN_SETUP },
|
|
{ "fetch-pack", cmd_fetch_pack, RUN_SETUP },
|
|
{ "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 },
|
|
{ "grep", cmd_grep, RUN_SETUP_GENTLY },
|
|
{ "hash-object", cmd_hash_object },
|
|
{ "help", cmd_help },
|
|
{ "index-pack", cmd_index_pack, RUN_SETUP_GENTLY },
|
|
{ "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 },
|
|
{ "mailsplit", cmd_mailsplit },
|
|
{ "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 },
|
|
{ "merge-ours", cmd_merge_ours, RUN_SETUP },
|
|
{ "merge-recursive", cmd_merge_recursive, RUN_SETUP | NEED_WORK_TREE },
|
|
{ "merge-recursive-ours", cmd_merge_recursive, RUN_SETUP | NEED_WORK_TREE },
|
|
{ "merge-recursive-theirs", cmd_merge_recursive, RUN_SETUP | NEED_WORK_TREE },
|
|
{ "merge-subtree", cmd_merge_recursive, RUN_SETUP | NEED_WORK_TREE },
|
|
{ "merge-tree", cmd_merge_tree, RUN_SETUP },
|
|
{ "mktag", cmd_mktag, RUN_SETUP },
|
|
{ "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 },
|
|
{ "pack-refs", cmd_pack_refs, RUN_SETUP },
|
|
{ "patch-id", cmd_patch_id },
|
|
{ "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 },
|
|
{ "read-tree", cmd_read_tree, RUN_SETUP },
|
|
{ "receive-pack", cmd_receive_pack },
|
|
{ "reflog", cmd_reflog, RUN_SETUP },
|
|
{ "remote", cmd_remote, RUN_SETUP },
|
|
{ "remote-ext", cmd_remote_ext },
|
|
{ "remote-fd", cmd_remote_fd },
|
|
{ "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 },
|
|
{ "rev-parse", cmd_rev_parse },
|
|
{ "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-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 },
|
|
{ "symbolic-ref", cmd_symbolic_ref, RUN_SETUP },
|
|
{ "tag", cmd_tag, RUN_SETUP },
|
|
{ "unpack-file", cmd_unpack_file, RUN_SETUP },
|
|
{ "unpack-objects", cmd_unpack_objects, RUN_SETUP },
|
|
{ "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 },
|
|
{ "upload-archive--writer", cmd_upload_archive_writer },
|
|
{ "var", cmd_var, RUN_SETUP_GENTLY },
|
|
{ "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);
|
|
}
|
|
|
|
#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)
|
|
{
|
|
const char *cmd;
|
|
struct cmd_struct *builtin;
|
|
|
|
strip_extension(argv);
|
|
cmd = argv[0];
|
|
|
|
/* Turn "git cmd --help" into "git help cmd" */
|
|
if (argc > 1 && !strcmp(argv[1], "--help")) {
|
|
argv[1] = argv[0];
|
|
argv[0] = cmd = "help";
|
|
}
|
|
|
|
builtin = get_builtin(cmd);
|
|
if (builtin)
|
|
exit(run_builtin(builtin, argc, argv));
|
|
}
|
|
|
|
static void execv_dashed_external(const char **argv)
|
|
{
|
|
struct strbuf cmd = STRBUF_INIT;
|
|
const char *tmp;
|
|
int status;
|
|
|
|
if (use_pager == -1)
|
|
use_pager = check_pager_config(argv[0]);
|
|
commit_pager_choice();
|
|
|
|
strbuf_addf(&cmd, "git-%s", argv[0]);
|
|
|
|
/*
|
|
* argv[0] must be the git command, but the argv array
|
|
* belongs to the caller, and may be reused in
|
|
* subsequent loop iterations. Save argv[0] and
|
|
* restore it on error.
|
|
*/
|
|
tmp = argv[0];
|
|
argv[0] = cmd.buf;
|
|
|
|
trace_argv_printf(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.
|
|
*/
|
|
status = run_command_v_opt(argv, RUN_SILENT_EXEC_FAILURE | RUN_CLEAN_ON_EXIT);
|
|
if (status >= 0 || errno != ENOENT)
|
|
exit(status);
|
|
|
|
argv[0] = tmp;
|
|
|
|
strbuf_release(&cmd);
|
|
}
|
|
|
|
static int run_argv(int *argcp, const char ***argv)
|
|
{
|
|
int done_alias = 0;
|
|
|
|
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);
|
|
|
|
/* It could be an alias -- this works around the insanity
|
|
* of overriding "git log" with "git show" by having
|
|
* alias.log = show
|
|
*/
|
|
if (done_alias)
|
|
break;
|
|
if (!handle_alias(argcp, argv))
|
|
break;
|
|
done_alias = 1;
|
|
}
|
|
|
|
return done_alias;
|
|
}
|
|
|
|
/*
|
|
* Many parts of Git have subprograms communicate via pipe, expect the
|
|
* upstream of a pipe to die with SIGPIPE when the downstream of a
|
|
* pipe does not need to read all that is written. Some third-party
|
|
* programs that ignore or block SIGPIPE for their own reason forget
|
|
* to restore SIGPIPE handling to the default before spawning Git and
|
|
* break this carefully orchestrated machinery.
|
|
*
|
|
* Restore the way SIGPIPE is handled to default, which is what we
|
|
* expect.
|
|
*/
|
|
static void restore_sigpipe_to_default(void)
|
|
{
|
|
sigset_t unblock;
|
|
|
|
sigemptyset(&unblock);
|
|
sigaddset(&unblock, SIGPIPE);
|
|
sigprocmask(SIG_UNBLOCK, &unblock, NULL);
|
|
signal(SIGPIPE, SIG_DFL);
|
|
}
|
|
|
|
int cmd_main(int argc, const char **argv)
|
|
{
|
|
const char *cmd;
|
|
int done_help = 0;
|
|
|
|
cmd = argv[0];
|
|
if (!cmd)
|
|
cmd = "git-help";
|
|
|
|
restore_sigpipe_to_default();
|
|
|
|
git_setup_gettext();
|
|
|
|
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;
|
|
}
|