use strvec_pushv() to add another strvec

Add and apply a semantic patch that simplifies the code by letting
strvec_pushv() append the items of a second strvec instead of pushing
them one by one.

Suggested-by: Junio C Hamano <gitster@pobox.com>
Signed-off-by: René Scharfe <l.s.r@web.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

builtin/rebase.c

@@ -182,8 +182,7 @@ static struct replay_opts get_replay_opts(const struct rebase_options *opts)
 
 	replay.signoff = opts->signoff;
 
-	for (size_t i = 0; i < opts->trailer_args.nr; i++)
-		strvec_push(&replay.trailer_args, opts->trailer_args.v[i]);
+	strvec_pushv(&replay.trailer_args, opts->trailer_args.v);
 
 	replay.allow_ff = !(opts->flags & REBASE_FORCE);
 	if (opts->allow_rerere_autoupdate)

fetch-pack.c

@@ -1024,12 +1024,8 @@ static int get_pack(struct fetch_pack_args *args,
 				     fsck_msg_types.buf);
 	}
 
-	if (index_pack_args) {
-		int i;
-
-		for (i = 0; i < cmd.args.nr; i++)
-			strvec_push(index_pack_args, cmd.args.v[i]);
-	}
+	if (index_pack_args)
+		strvec_pushv(index_pack_args, cmd.args.v);
 
 	sigchain_push(SIGPIPE, SIG_IGN);
 

git.c

@@ -877,8 +877,7 @@ static int run_argv(struct strvec *args)
 			commit_pager_choice();
 
 			strvec_push(&cmd.args, "git");
-			for (size_t i = 0; i < args->nr; i++)
-				strvec_push(&cmd.args, args->v[i]);
+			strvec_pushv(&cmd.args, args->v);
 
 			trace_argv_printf(cmd.args.v, "trace: exec:");
 

submodule.c

@@ -1815,7 +1815,6 @@ int fetch_submodules(struct repository *r,
 		     int default_option,
 		     int quiet, int max_parallel_jobs)
 {
-	int i;
 	struct submodule_parallel_fetch spf = SPF_INIT;
 	const struct run_process_parallel_opts opts = {
 		.tr2_category = "submodule",
@@ -1842,8 +1841,7 @@ int fetch_submodules(struct repository *r,
 		die(_("index file corrupt"));
 
 	strvec_push(&spf.args, "fetch");
-	for (i = 0; i < options->nr; i++)
-		strvec_push(&spf.args, options->v[i]);
+	strvec_pushv(&spf.args, options->v);
 	strvec_push(&spf.args, "--recurse-submodules-default");
 	/* default value, "--submodule-prefix" and its value are added later */
 

tools/coccinelle/strvec.cocci

@@ -0,0 +1,46 @@
+@@
+type T;
+identifier i;
+expression dst;
+struct strvec *src_ptr;
+struct strvec src_arr;
+@@
+(
+- for (T i = 0; i < src_ptr->nr; i++) { strvec_push(dst, src_ptr->v[i]); }
++ strvec_pushv(dst, src_ptr->v);
+|
+- for (T i = 0; i < src_arr.nr; i++) { strvec_push(dst, src_arr.v[i]); }
++ strvec_pushv(dst, src_arr.v);
+)
+
+@ separate_loop_index @
+type T;
+identifier i;
+expression dst;
+struct strvec *src_ptr;
+struct strvec src_arr;
+@@
+  T i;
+  ...
+(
+- for (i = 0; i < src_ptr->nr; i++) { strvec_push(dst, src_ptr->v[i]); }
++ strvec_pushv(dst, src_ptr->v);
+|
+- for (i = 0; i < src_arr.nr; i++) { strvec_push(dst, src_arr.v[i]); }
++ strvec_pushv(dst, src_arr.v);
+)
+
+@ unused_loop_index extends separate_loop_index @
+@@
+  {
+  ...
+- T i;
+  ... when != i
+  }
+
+@ depends on unused_loop_index @
+@@
+  if (...)
+- {
+  strvec_pushv(...);
+- }