hook: fix minor style issues

Fix some minor style nits pointed by Patrick and Junio:
  * Use CALLOC_ARRAY instead of xcalloc.
  * Init struct members during declaration.
  * Simplify if condition boolean logic.
  * Missing curly braces in if/else stmts.
  * Unnecessary header includes.
  * Capitalization in error/warn messages.
  * Comment spelling: free'd -> freed.

These contain no logic changes, the code behaves the same as before.

Suggested-by: Junio C Hamano <gitster@pobox.com>
Suggested-by: Patrick Steinhardt <ps@pks.im>
Signed-off-by: Adrian Ratiu <adrian.ratiu@collabora.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

builtin/hook.c

@@ -5,8 +5,6 @@
 #include "gettext.h"
 #include "hook.h"
 #include "parse-options.h"
-#include "strvec.h"
-#include "abspath.h"
 
 #define BUILTIN_HOOK_RUN_USAGE \
 	N_("git hook run [--ignore-missing] [--to-stdin=<path>] <hook-name> [-- <hook-args>]")
@@ -51,7 +49,7 @@ static int list(int argc, const char **argv, const char *prefix,
 	 * arguments later they probably should be caught by parse_options.
 	 */
 	if (argc != 1)
-		usage_msg_opt(_("You must specify a hook event name to list."),
+		usage_msg_opt(_("you must specify a hook event name to list."),
 			      builtin_hook_list_usage, list_options);
 
 	hookname = argv[0];
@@ -59,7 +57,7 @@ static int list(int argc, const char **argv, const char *prefix,
 	head = list_hooks(repo, hookname, NULL);
 
 	if (!head->nr) {
-		warning(_("No hooks found for event '%s'"), hookname);
+		warning(_("no hooks found for event '%s'"), hookname);
 		ret = 1; /* no hooks found */
 		goto cleanup;
 	}

builtin/receive-pack.c

@@ -904,7 +904,8 @@ static int feed_receive_hook_cb(int hook_stdin_fd, void *pp_cb UNUSED, void *pp_
 static void *receive_hook_feed_state_alloc(void *feed_pipe_ctx)
 {
 	struct receive_hook_feed_state *init_state = feed_pipe_ctx;
-	struct receive_hook_feed_state *data = xcalloc(1, sizeof(*data));
+	struct receive_hook_feed_state *data;
+	CALLOC_ARRAY(data, 1);
 	data->report = init_state->report;
 	data->cmd = init_state->cmd;
 	data->skip_broken = init_state->skip_broken;
@@ -928,7 +929,11 @@ static int run_receive_hook(struct command *commands,
 {
 	struct run_hooks_opt opt = RUN_HOOKS_OPT_INIT;
 	struct command *iter = commands;
-	struct receive_hook_feed_state feed_init_state = { 0 };
+	struct receive_hook_feed_state feed_init_state = {
+		.cmd = commands,
+		.skip_broken = skip_broken,
+		.buf = STRBUF_INIT,
+	};
 	struct async sideband_async;
 	int sideband_async_started = 0;
 	int saved_stderr = -1;
@@ -961,8 +966,6 @@ static int run_receive_hook(struct command *commands,
 	prepare_sideband_async(&sideband_async, &saved_stderr, &sideband_async_started);
 
 	/* set up stdin callback */
-	feed_init_state.cmd = commands;
-	feed_init_state.skip_broken = skip_broken;
 	opt.feed_pipe_ctx = &feed_init_state;
 	opt.feed_pipe = feed_receive_hook_cb;
 	opt.feed_pipe_cb_data_alloc = receive_hook_feed_state_alloc;

hook.c

@@ -57,9 +57,9 @@ static void hook_clear(struct hook *h, cb_data_free_fn cb_data_free)
 	if (!h)
 		return;
 
-	if (h->kind == HOOK_TRADITIONAL)
+	if (h->kind == HOOK_TRADITIONAL) {
 		free((void *)h->u.traditional.path);
-	else if (h->kind == HOOK_CONFIGURED) {
+	} else if (h->kind == HOOK_CONFIGURED) {
 		free((void *)h->u.configured.friendly_name);
 		free((void *)h->u.configured.command);
 	}
@@ -91,7 +91,7 @@ static void list_hooks_add_default(struct repository *r, const char *hookname,
 	if (!hook_path)
 		return;
 
-	h = xcalloc(1, sizeof(struct hook));
+	CALLOC_ARRAY(h, 1);
 
 	/*
 	 * If the hook is to run in a specific dir, a relative path can
@@ -154,7 +154,7 @@ static int hook_config_lookup_all(const char *key, const char *value,
 				strmap_get(&data->event_hooks, value);
 
 			if (!hooks) {
-				hooks = xcalloc(1, sizeof(*hooks));
+				CALLOC_ARRAY(hooks, 1);
 				string_list_init_dup(hooks);
 				strmap_put(&data->event_hooks, value, hooks);
 			}
@@ -227,7 +227,8 @@ static void build_hook_config_map(struct repository *r, struct strmap *cache)
 	/* Construct the cache from parsed configs. */
 	strmap_for_each_entry(&cb_data.event_hooks, &iter, e) {
 		struct string_list *hook_names = e->value;
-		struct string_list *hooks = xcalloc(1, sizeof(*hooks));
+		struct string_list *hooks;
+		CALLOC_ARRAY(hooks, 1);
 
 		string_list_init_dup(hooks);
 
@@ -281,7 +282,7 @@ static struct strmap *get_hook_config_cache(struct repository *r)
 		 * it just once on the first call.
 		 */
 		if (!r->hook_config_cache) {
-			r->hook_config_cache = xcalloc(1, sizeof(*cache));
+			CALLOC_ARRAY(r->hook_config_cache, 1);
 			strmap_init(r->hook_config_cache);
 			build_hook_config_map(r, r->hook_config_cache);
 		}
@@ -289,9 +290,9 @@ static struct strmap *get_hook_config_cache(struct repository *r)
 	} else {
 		/*
 		 * Out-of-repo calls (no gitdir) allocate and return a temporary
-		 * map cache which gets free'd immediately by the caller.
+		 * cache which gets freed immediately by the caller.
 		 */
-		cache = xcalloc(1, sizeof(*cache));
+		CALLOC_ARRAY(cache, 1);
 		strmap_init(cache);
 		build_hook_config_map(r, cache);
 	}
@@ -311,7 +312,8 @@ static void list_hooks_add_configured(struct repository *r,
 	for (size_t i = 0; configured_hooks && i < configured_hooks->nr; i++) {
 		const char *friendly_name = configured_hooks->items[i].string;
 		const char *command = configured_hooks->items[i].util;
-		struct hook *hook = xcalloc(1, sizeof(struct hook));
+		struct hook *hook;
+		CALLOC_ARRAY(hook, 1);
 
 		if (options && options->feed_pipe_cb_data_alloc)
 			hook->feed_pipe_cb_data =
@@ -343,7 +345,7 @@ struct string_list *list_hooks(struct repository *r, const char *hookname,
 	if (!hookname)
 		BUG("null hookname was provided to hook_list()!");
 
-	hook_head = xmalloc(sizeof(struct string_list));
+	CALLOC_ARRAY(hook_head, 1);
 	string_list_init_dup(hook_head);
 
 	/* Add hooks from the config, e.g. hook.myhook.event = pre-commit */
@@ -493,8 +495,7 @@ int run_hooks_opt(struct repository *r, const char *hook_name,
 	 * Ensure cb_data copy and free functions are either provided together,
 	 * or neither one is provided.
 	 */
-	if ((options->feed_pipe_cb_data_alloc && !options->feed_pipe_cb_data_free) ||
-	    (!options->feed_pipe_cb_data_alloc && options->feed_pipe_cb_data_free))
+	if (!options->feed_pipe_cb_data_alloc != !options->feed_pipe_cb_data_free)
 		BUG("feed_pipe_cb_data_alloc and feed_pipe_cb_data_free must be set together");
 
 	if (options->invoked_hook)

refs.c

@@ -2599,7 +2599,8 @@ static int transaction_hook_feed_stdin(int hook_stdin_fd, void *pp_cb, void *pp_
 
 static void *transaction_feed_cb_data_alloc(void *feed_pipe_ctx UNUSED)
 {
-	struct transaction_feed_cb_data *data = xmalloc(sizeof(*data));
+	struct transaction_feed_cb_data *data;
+	CALLOC_ARRAY(data, 1);
 	strbuf_init(&data->buf, 0);
 	data->index = 0;
 	return data;

t/t1800-hook.sh

@@ -34,7 +34,7 @@ test_expect_success 'git hook usage' '
 
 test_expect_success 'git hook list: nonexistent hook' '
 	cat >stderr.expect <<-\EOF &&
-	warning: No hooks found for event '\''test-hook'\''
+	warning: no hooks found for event '\''test-hook'\''
 	EOF
 	test_expect_code 1 git hook list test-hook 2>stderr.actual &&
 	test_cmp stderr.expect stderr.actual

transport.c

@@ -1360,7 +1360,8 @@ static int pre_push_hook_feed_stdin(int hook_stdin_fd, void *pp_cb UNUSED, void
 
 static void *pre_push_hook_data_alloc(void *feed_pipe_ctx)
 {
-	struct feed_pre_push_hook_data *data = xmalloc(sizeof(*data));
+	struct feed_pre_push_hook_data *data;
+	CALLOC_ARRAY(data, 1);
 	strbuf_init(&data->buf, 0);
 	data->refs = (struct ref *)feed_pipe_ctx;
 	return data;