" <command> [<args>]";
const char git_more_info_string[] =
- N_("'git help -a' and 'git help -g' lists available subcommands and some\n"
+ 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 struct startup_info git_startup_info;
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 saved_environment;
+
+static void save_env(void)
+{
+ int i;
+ if (saved_environment)
+ return;
+ saved_environment = 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(void)
+{
+ int i;
+ if (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 (orig_env[i])
+ setenv(env_names[i], orig_env[i], 1);
+ else
+ unsetenv(env_names[i]);
+ }
+}
static void commit_pager_choice(void) {
switch (use_pager) {
/*
* Check remaining flags.
*/
- if (starts_with(cmd, "--exec-path")) {
- cmd += 11;
+ if (skip_prefix(cmd, "--exec-path", &cmd)) {
if (*cmd == '=')
git_set_argv_exec_path(cmd + 1);
else {
if (envchanged)
*envchanged = 1;
} else if (!strcmp(cmd, "--no-replace-objects")) {
- read_replace_refs = 0;
+ check_replace_refs = 0;
setenv(NO_REPLACE_OBJECTS_ENVIRONMENT, "1", 1);
if (envchanged)
*envchanged = 1;
*envchanged = 1;
(*argv)++;
(*argc)--;
- } else if (starts_with(cmd, "--git-dir=")) {
- setenv(GIT_DIR_ENVIRONMENT, cmd + 10, 1);
+ } else if (skip_prefix(cmd, "--git-dir=", &cmd)) {
+ setenv(GIT_DIR_ENVIRONMENT, cmd, 1);
if (envchanged)
*envchanged = 1;
} else if (!strcmp(cmd, "--namespace")) {
*envchanged = 1;
(*argv)++;
(*argc)--;
- } else if (starts_with(cmd, "--namespace=")) {
- setenv(GIT_NAMESPACE_ENVIRONMENT, cmd + 12, 1);
+ } else if (skip_prefix(cmd, "--namespace=", &cmd)) {
+ setenv(GIT_NAMESPACE_ENVIRONMENT, cmd, 1);
if (envchanged)
*envchanged = 1;
} else if (!strcmp(cmd, "--work-tree")) {
*envchanged = 1;
(*argv)++;
(*argc)--;
- } else if (starts_with(cmd, "--work-tree=")) {
- setenv(GIT_WORK_TREE_ENVIRONMENT, cmd + 12, 1);
+ } else if (skip_prefix(cmd, "--work-tree=", &cmd)) {
+ setenv(GIT_WORK_TREE_ENVIRONMENT, cmd, 1);
if (envchanged)
*envchanged = 1;
} else if (!strcmp(cmd, "--bare")) {
- static char git_dir[PATH_MAX+1];
+ char *cwd = xgetcwd();
is_bare_repository_cfg = 1;
- setenv(GIT_DIR_ENVIRONMENT, getcwd(git_dir, sizeof(git_dir)), 0);
+ setenv(GIT_DIR_ENVIRONMENT, cwd, 0);
+ free(cwd);
setenv(GIT_IMPLICIT_WORK_TREE_ENVIRONMENT, "0", 1);
if (envchanged)
*envchanged = 1;
"trace: alias expansion: %s =>",
alias_command);
- new_argv = xrealloc(new_argv, sizeof(char *) *
- (count + *argcp));
+ REALLOC_ARRAY(new_argv, count + *argcp);
/* insert after command name */
memcpy(new_argv + count, *argv + 1, sizeof(char *) * *argcp);
* RUN_SETUP for reading from the configuration file.
*/
#define NEED_WORK_TREE (1<<3)
+#define NO_SETUP (1<<4)
struct cmd_struct {
const char *cmd;
if (!help) {
if (p->option & RUN_SETUP)
prefix = setup_git_directory();
- if (p->option & RUN_SETUP_GENTLY) {
+ else if (p->option & RUN_SETUP_GENTLY) {
int nongit_ok;
prefix = setup_git_directory_gently(&nongit_ok);
}
{ "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 },
+ { "clone", cmd_clone, NO_SETUP },
{ "column", cmd_column, RUN_SETUP_GENTLY },
{ "commit", cmd_commit, RUN_SETUP | NEED_WORK_TREE },
{ "commit-tree", cmd_commit_tree, RUN_SETUP },
{ "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 },
+ { "init", cmd_init_db, NO_SETUP },
+ { "init-db", cmd_init_db, NO_SETUP },
+ { "interpret-trailers", cmd_interpret_trailers, RUN_SETUP },
{ "log", cmd_log, RUN_SETUP },
{ "ls-files", cmd_ls_files, RUN_SETUP },
{ "ls-remote", cmd_ls_remote, RUN_SETUP_GENTLY },
{ "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 },
{ "write-tree", cmd_write_tree, RUN_SETUP },
};
-int is_builtin(const char *s)
+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;
+ struct cmd_struct *p = commands + i;
if (!strcmp(s, p->cmd))
- return 1;
+ return p;
}
- return 0;
+ return NULL;
+}
+
+int is_builtin(const char *s)
+{
+ return !!get_builtin(s);
}
static void handle_builtin(int argc, const char **argv)
const char *cmd = argv[0];
int i;
static const char ext[] = STRIP_EXTENSION;
+ struct cmd_struct *builtin;
if (sizeof(ext) > 1) {
i = strlen(argv[0]) - strlen(ext);
argv[0] = cmd = "help";
}
- for (i = 0; i < ARRAY_SIZE(commands); i++) {
- struct cmd_struct *p = commands+i;
- if (strcmp(p->cmd, cmd))
- continue;
- exit(run_builtin(p, argc, argv));
+ builtin = get_builtin(cmd);
+ if (builtin) {
+ if (saved_environment && (builtin->option & NO_SETUP))
+ restore_env();
+ else
+ exit(run_builtin(builtin, argc, argv));
}
}
* of overriding "git log" with "git show" by having
* alias.log = show
*/
- if (done_alias || !handle_alias(argcp, argv))
+ if (done_alias)
+ break;
+ save_env();
+ 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 main(int argc, char **av)
{
*/
sanitize_stdfds();
+ restore_sigpipe_to_default();
+
git_setup_gettext();
+ trace_command_performance(argv);
+
/*
* "git-xxxx" is the same as "git xxxx", but we obviously:
*
* So we just directly call the builtin handler, and die if
* that one cannot handle it.
*/
- if (starts_with(cmd, "git-")) {
- cmd += 4;
+ if (skip_prefix(cmd, "git-", &cmd)) {
argv[0] = cmd;
handle_builtin(argc, argv);
die("cannot handle %s as a builtin", cmd);
argc--;
handle_options(&argv, &argc, NULL);
if (argc > 0) {
- if (starts_with(argv[0], "--"))
- argv[0] += 2;
+ /* 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();