@@ -738,18 +738,17 @@ enum bisect_error bisect_checkout(const struct object_id *bisect_rev,
update_ref(NULL, "BISECT_EXPECTED_REV", bisect_rev, NULL, 0, UPDATE_REFS_DIE_ON_ERR);
argv_checkout[2] = bisect_rev_hex;
- if (no_checkout) {
+ if (no_checkout)
update_ref(NULL, "BISECT_HEAD", bisect_rev, NULL, 0,
UPDATE_REFS_DIE_ON_ERR);
- } else {
- if (run_command_v_opt(argv_checkout, RUN_GIT_CMD))
- /*
- * Errors in `run_command()` itself, signaled by res < 0,
- * and errors in the child process, signaled by res > 0
- * can both be treated as regular BISECT_FAILED (-1).
- */
- return BISECT_FAILED;
- }
+ else if (run_command_l_opt(RUN_GIT_CMD, "checkout", "-q",
+ bisect_rev_hex, "--", NULL))
+ /*
+ * Errors in `run_command()` itself, signaled by res < 0,
+ * and errors in the child process, signaled by res > 0
+ * can both be treated as regular BISECT_FAILED (-1).
+ */
+ return BISECT_FAILED;
commit = lookup_commit_reference(the_repository, bisect_rev);
format_commit_message(commit, "[%H] %s%n", &commit_msg, &pp);
@@ -651,23 +651,19 @@ static void update_head(const struct ref *our, const struct ref *remote,
static int git_sparse_checkout_init(const char *repo)
{
- struct strvec argv = STRVEC_INIT;
- int result = 0;
- strvec_pushl(&argv, "-C", repo, "sparse-checkout", "set", NULL);
-
/*
* We must apply the setting in the current process
* for the later checkout to use the sparse-checkout file.
*/
core_apply_sparse_checkout = 1;
- if (run_command_v_opt(argv.v, RUN_GIT_CMD)) {
+ if (run_command_l_opt(RUN_GIT_CMD, "-C", repo, "sparse-checkout",
+ "set", NULL)) {
error(_("failed to initialize sparse-checkout"));
- result = 1;
+ return 1;
}
- strvec_clear(&argv);
- return result;
+ return 0;
}
static int checkout(int submodule_progress, int filter_submodules)
@@ -862,11 +858,11 @@ static void write_refspec_config(const char *src_ref_prefix,
static void dissociate_from_references(void)
{
- static const char* argv[] = { "repack", "-a", "-d", NULL };
char *alternates = git_pathdup("objects/info/alternates");
if (!access(alternates, F_OK)) {
- if (run_command_v_opt(argv, RUN_GIT_CMD|RUN_COMMAND_NO_STDIN))
+ if (run_command_l_opt(RUN_GIT_CMD|RUN_COMMAND_NO_STDIN,
+ "repack", "-a", "-d", NULL))
die(_("cannot repack to clean up"));
if (unlink(alternates) && errno != ENOENT)
die_errno(_("cannot unlink temporary alternates file"));
@@ -44,8 +44,8 @@ static int difftool_config(const char *var, const char *value, void *cb)
static int print_tool_help(void)
{
- const char *argv[] = { "mergetool", "--tool-help=diff", NULL };
- return run_command_v_opt(argv, RUN_GIT_CMD);
+ return run_command_l_opt(RUN_GIT_CMD, "mergetool", "--tool-help=diff",
+ NULL);
}
static int parse_index_info(char *p, int *mode1, int *mode2,
@@ -361,7 +361,7 @@ static int run_dir_diff(const char *extcmd, int symlinks, const char *prefix,
struct index_state wtindex;
struct checkout lstate, rstate;
int flags = RUN_GIT_CMD, err = 0;
- const char *helper_argv[] = { "difftool--helper", NULL, NULL, NULL };
+ const char *helper_command = "difftool--helper";
struct hashmap wt_modified, tmp_modified;
int indices_loaded = 0;
@@ -563,16 +563,14 @@ static int run_dir_diff(const char *extcmd, int symlinks, const char *prefix,
}
strbuf_setlen(&ldir, ldir_len);
- helper_argv[1] = ldir.buf;
strbuf_setlen(&rdir, rdir_len);
- helper_argv[2] = rdir.buf;
-
if (extcmd) {
- helper_argv[0] = extcmd;
+ helper_command = extcmd;
flags = 0;
} else
setenv("GIT_DIFFTOOL_DIRDIFF", "true", 1);
- ret = run_command_v_opt(helper_argv, flags);
+ ret = run_command_l_opt(flags, helper_command, ldir.buf, rdir.buf,
+ NULL);
/* TODO: audit for interaction with sparse-index. */
ensure_full_index(&wtindex);
@@ -58,8 +58,6 @@ static unsigned long max_delta_cache_size = DEFAULT_DELTA_CACHE_SIZE;
static struct strvec reflog = STRVEC_INIT;
static struct strvec repack = STRVEC_INIT;
static struct strvec prune = STRVEC_INIT;
-static struct strvec prune_worktrees = STRVEC_INIT;
-static struct strvec rerere = STRVEC_INIT;
static struct tempfile *pidfile;
static struct lock_file log_lock;
@@ -167,9 +165,8 @@ static void gc_config(void)
struct maintenance_run_opts;
static int maintenance_task_pack_refs(MAYBE_UNUSED struct maintenance_run_opts *opts)
{
- const char *argv[] = { "pack-refs", "--all", "--prune", NULL };
-
- return run_command_v_opt(argv, RUN_GIT_CMD);
+ return run_command_l_opt(RUN_GIT_CMD, "pack-refs", "--all", "--prune",
+ NULL);
}
static int too_many_loose_objects(void)
@@ -574,8 +571,6 @@ int cmd_gc(int argc, const char **argv, const char *prefix)
strvec_pushl(&reflog, "reflog", "expire", "--all", NULL);
strvec_pushl(&repack, "repack", "-d", "-l", NULL);
strvec_pushl(&prune, "prune", "--expire", NULL);
- strvec_pushl(&prune_worktrees, "worktree", "prune", "--expire", NULL);
- strvec_pushl(&rerere, "rerere", "gc", NULL);
/* default expiry time, overwritten in gc_config */
gc_config();
@@ -688,14 +683,13 @@ int cmd_gc(int argc, const char **argv, const char *prefix)
}
}
- if (prune_worktrees_expire) {
- strvec_push(&prune_worktrees, prune_worktrees_expire);
- if (run_command_v_opt(prune_worktrees.v, RUN_GIT_CMD))
- die(FAILED_RUN, prune_worktrees.v[0]);
- }
+ if (prune_worktrees_expire &&
+ run_command_l_opt(RUN_GIT_CMD, "worktree", "prune", "--expire",
+ prune_worktrees_expire, NULL))
+ die(FAILED_RUN, "worktree");
- if (run_command_v_opt(rerere.v, RUN_GIT_CMD))
- die(FAILED_RUN, rerere.v[0]);
+ if (run_command_l_opt(RUN_GIT_CMD, "rerere", "gc", NULL))
+ die(FAILED_RUN, "rerere");
report_garbage = report_pack_garbage;
reprepare_packed_git(the_repository);
@@ -347,55 +347,32 @@ static int save_state(struct object_id *stash)
static void read_empty(const struct object_id *oid)
{
- int i = 0;
- const char *args[7];
-
- args[i++] = "read-tree";
- args[i++] = "-m";
- args[i++] = "-u";
- args[i++] = empty_tree_oid_hex();
- args[i++] = oid_to_hex(oid);
- args[i] = NULL;
-
- if (run_command_v_opt(args, RUN_GIT_CMD))
+ if (run_command_l_opt(RUN_GIT_CMD, "read-tree", "-m", "-u",
+ empty_tree_oid_hex(), oid_to_hex(oid), NULL))
die(_("read-tree failed"));
}
static void reset_hard(const struct object_id *oid)
{
- int i = 0;
- const char *args[6];
-
- args[i++] = "read-tree";
- args[i++] = "-v";
- args[i++] = "--reset";
- args[i++] = "-u";
- args[i++] = oid_to_hex(oid);
- args[i] = NULL;
-
- if (run_command_v_opt(args, RUN_GIT_CMD))
+ if (run_command_l_opt(RUN_GIT_CMD, "read-tree", "-v", "--reset", "-u",
+ oid_to_hex(oid), NULL))
die(_("read-tree failed"));
}
static void restore_state(const struct object_id *head,
const struct object_id *stash)
{
- struct strvec args = STRVEC_INIT;
-
reset_hard(head);
if (is_null_oid(stash))
goto refresh_cache;
- strvec_pushl(&args, "stash", "apply", "--index", "--quiet", NULL);
- strvec_push(&args, oid_to_hex(stash));
-
/*
* It is OK to ignore error here, for example when there was
* nothing to restore.
*/
- run_command_v_opt(args.v, RUN_GIT_CMD);
- strvec_clear(&args);
+ run_command_l_opt(RUN_GIT_CMD, "stash", "apply", "--index", "--quiet",
+ oid_to_hex(stash), NULL);
refresh_cache:
if (discard_cache() < 0 || read_cache() < 0)
@@ -196,17 +196,15 @@ static int read_yes_no_answer(void)
static int ask_yes_no_if_possible(const char *format, ...)
{
char question[4096];
- const char *retry_hook[] = { NULL, NULL, NULL };
+ char *retry_hook;
va_list args;
va_start(args, format);
vsnprintf(question, sizeof(question), format, args);
va_end(args);
- if ((retry_hook[0] = mingw_getenv("GIT_ASK_YESNO"))) {
- retry_hook[1] = question;
- return !run_command_v_opt(retry_hook, 0);
- }
+ if ((retry_hook = mingw_getenv("GIT_ASK_YESNO")))
+ return !run_command_l_opt(0, retry_hook, question, NULL);
if (!isatty(_fileno(stdin)) || !isatty(_fileno(stderr)))
return 0;
@@ -193,7 +193,6 @@ static enum ll_merge_result ll_ext_merge(const struct ll_merge_driver *fn,
struct strbuf cmd = STRBUF_INIT;
struct strbuf_expand_dict_entry dict[6];
struct strbuf path_sq = STRBUF_INIT;
- const char *args[] = { NULL, NULL };
int status, fd, i;
struct stat st;
enum ll_merge_result ret;
@@ -219,8 +218,7 @@ static enum ll_merge_result ll_ext_merge(const struct ll_merge_driver *fn,
strbuf_expand(&cmd, fn->cmdline, strbuf_expand_dict_cb, &dict);
- args[0] = cmd.buf;
- status = run_command_v_opt(args, RUN_USING_SHELL);
+ status = run_command_l_opt(RUN_USING_SHELL, cmd.buf, NULL);
fd = open(temp[1], O_RDONLY);
if (fd < 0)
goto bad;
@@ -1016,6 +1016,21 @@ static void run_command_set_opts(struct child_process *cmd, int opt)
cmd->close_object_store = opt & RUN_CLOSE_OBJECT_STORE ? 1 : 0;
}
+int run_command_l_opt(int opt, ...)
+{
+ struct child_process cmd = CHILD_PROCESS_INIT;
+ va_list ap;
+ const char *arg;
+
+ va_start(ap, opt);
+ while ((arg = va_arg(ap, const char *)))
+ strvec_push(&cmd.args, arg);
+ va_end(ap);
+
+ run_command_set_opts(&cmd, opt);
+ return run_command(&cmd);
+}
+
static int run_command_v_opt_1(struct child_process *cmd, int opt)
{
run_command_set_opts(cmd, opt);
@@ -151,8 +151,8 @@ struct child_process {
/**
* The functions: child_process_init, start_command, finish_command,
- * run_command, run_command_v_opt, run_command_v_opt_cd_env, child_process_clear
- * do the following:
+ * run_command, run_command_l_opt, run_command_v_opt,
+ * run_command_v_opt_cd_env, child_process_clear do the following:
*
* - If a system call failed, errno is set and -1 is returned. A diagnostic
* is printed.
@@ -254,6 +254,15 @@ int run_command_v_opt_cd_env(const char **argv, int opt, const char *dir, const
int run_command_v_opt_cd_env_tr2(const char **argv, int opt, const char *dir,
const char *const *env, const char *tr2_class);
+/**
+ * The run_command_l_opt() function run_command_v_opt() takes a list
+ * of strings terminated by a NULL. Use it instead of
+ * run_command_v_opt() when possible, as it allows the compiler to
+ * check that the "argv" is NULL-delimited.
+ */
+LAST_ARG_MUST_BE_NULL
+int run_command_l_opt(int opt, ...);
+
/**
* Execute the given command, sending "in" to its stdin, and capturing its
* stdout and stderr in the "out" and "err" strbufs. Any of the three may
@@ -3558,12 +3558,10 @@ static int error_failed_squash(struct repository *r,
static int do_exec(struct repository *r, const char *command_line)
{
- const char *child_argv[] = { NULL, NULL };
int dirty, status;
fprintf(stderr, _("Executing: %s\n"), command_line);
- child_argv[0] = command_line;
- status = run_command_v_opt(child_argv, RUN_USING_SHELL);
+ status = run_command_l_opt(RUN_USING_SHELL, command_line, NULL);
/* force re-reading of the cache */
if (discard_index(r->index) < 0 || repo_read_index(r) < 0)
@@ -8,7 +8,6 @@ int cmd_main(int argc, const char **argv)
struct strbuf buf = STRBUF_INIT;
FILE *f;
int i;
- const char *child_argv[] = { NULL, NULL };
/* First, print all parameters into $TRASH_DIRECTORY/ssh-output */
if (!trash_directory)
@@ -25,6 +24,5 @@ int cmd_main(int argc, const char **argv)
/* Now, evaluate the *last* parameter */
if (argc < 2)
return 0;
- child_argv[0] = argv[argc - 1];
- return run_command_v_opt(child_argv, RUN_USING_SHELL);
+ return run_command_l_opt(RUN_USING_SHELL, argv[argc - 1], NULL);
}
When run_command() is used with strvec_pushl() as in the pre-image of b004c902827 (gc: simplify maintenance_task_pack_refs(), 2022-10-04) we get the benefit of the LAST_ARG_MUST_BE_NULL. See 9fe3edc47f1 (Add the LAST_ARG_MUST_BE_NULL macro, 2013-07-18). Let's provide and use a run_command_l_opt() function, which gives us the best of both worlds. We'll now need less code to accomplish the same thing, and this version's safer as we can assert that the terminating NULL is present. The "builtin/bisect--helper.c" would be a large beneficiary of this API, with "15 insertions(+), 26 deletions(-)", but let's leave that aside for now, as there's an outstanding topic that's extensively modifying it. Signed-off-by: Ævar Arnfjörð Bjarmason <avarab@gmail.com> --- bisect.c | 19 +++++++++---------- builtin/clone.c | 16 ++++++---------- builtin/difftool.c | 14 ++++++-------- builtin/gc.c | 22 ++++++++-------------- builtin/merge.c | 35 ++++++----------------------------- compat/mingw.c | 8 +++----- ll-merge.c | 4 +--- run-command.c | 15 +++++++++++++++ run-command.h | 13 +++++++++++-- sequencer.c | 4 +--- t/helper/test-fake-ssh.c | 4 +--- 11 files changed, 67 insertions(+), 87 deletions(-)