[PATCH 12/27] fetch-pack: use a common function for verbose printing

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This reduces the number of "if (verbose)" which makes it a bit easier
to read imo. It also makes it easier to redirect all these printouts,
to a file for example.

Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@xxxxxxxxx>
Signed-off-by: Junio C Hamano <gitster@xxxxxxxxx>
---
 fetch-pack.c | 88 +++++++++++++++++++++++++++++-------------------------------
 1 file changed, 42 insertions(+), 46 deletions(-)

diff --git a/fetch-pack.c b/fetch-pack.c
index 01e34b6..4020744 100644
--- a/fetch-pack.c
+++ b/fetch-pack.c
@@ -50,6 +50,21 @@ static int non_common_revs, multi_ack, use_sideband;
 #define ALLOW_REACHABLE_SHA1	02
 static unsigned int allow_unadvertised_object_request;
 
+__attribute__((format (printf, 2, 3)))
+static inline void print_verbose(const struct fetch_pack_args *args,
+				 const char *fmt, ...)
+{
+	va_list params;
+
+	if (!args->verbose)
+		return;
+
+	va_start(params, fmt);
+	vfprintf(stderr, fmt, params);
+	va_end(params);
+	fputc('\n', stderr);
+}
+
 static void rev_list_push(struct commit *commit, int mark)
 {
 	if (!(commit->object.flags & mark)) {
@@ -375,8 +390,7 @@ static int find_common(struct fetch_pack_args *args,
 	retval = -1;
 	while ((sha1 = get_rev())) {
 		packet_buf_write(&req_buf, "have %s\n", sha1_to_hex(sha1));
-		if (args->verbose)
-			fprintf(stderr, "have %s\n", sha1_to_hex(sha1));
+		print_verbose(args, "have %s", sha1_to_hex(sha1));
 		in_vain++;
 		if (flush_at <= ++count) {
 			int ack;
@@ -397,9 +411,9 @@ static int find_common(struct fetch_pack_args *args,
 			consume_shallow_list(args, fd[0]);
 			do {
 				ack = get_ack(fd[0], result_sha1);
-				if (args->verbose && ack)
-					fprintf(stderr, "got ack %d %s\n", ack,
-							sha1_to_hex(result_sha1));
+				if (ack)
+					print_verbose(args, "got ack %d %s", ack,
+						      sha1_to_hex(result_sha1));
 				switch (ack) {
 				case ACK:
 					flushes = 0;
@@ -438,8 +452,7 @@ static int find_common(struct fetch_pack_args *args,
 			} while (ack);
 			flushes--;
 			if (got_continue && MAX_IN_VAIN < in_vain) {
-				if (args->verbose)
-					fprintf(stderr, "giving up\n");
+				print_verbose(args, "giving up");
 				break; /* give up */
 			}
 		}
@@ -449,8 +462,7 @@ done:
 		packet_buf_write(&req_buf, "done\n");
 		send_request(args, fd[1], &req_buf);
 	}
-	if (args->verbose)
-		fprintf(stderr, "done\n");
+	print_verbose(args, "done");
 	if (retval != 0) {
 		multi_ack = 0;
 		flushes++;
@@ -462,9 +474,8 @@ done:
 	while (flushes || multi_ack) {
 		int ack = get_ack(fd[0], result_sha1);
 		if (ack) {
-			if (args->verbose)
-				fprintf(stderr, "got ack (%d) %s\n", ack,
-					sha1_to_hex(result_sha1));
+			print_verbose(args, "got ack (%d) %s", ack,
+				      sha1_to_hex(result_sha1));
 			if (ack == ACK)
 				return 0;
 			multi_ack = 1;
@@ -509,9 +520,8 @@ static void mark_recent_complete_commits(struct fetch_pack_args *args,
 					 unsigned long cutoff)
 {
 	while (complete && cutoff <= complete->item->date) {
-		if (args->verbose)
-			fprintf(stderr, "Marking %s as complete\n",
-				oid_to_hex(&complete->item->object.oid));
+		print_verbose(args, "Marking %s as complete",
+			      oid_to_hex(&complete->item->object.oid));
 		pop_most_recent_commit(&complete, COMPLETE);
 	}
 }
@@ -652,18 +662,12 @@ static int everything_local(struct fetch_pack_args *args,
 		o = lookup_object(remote);
 		if (!o || !(o->flags & COMPLETE)) {
 			retval = 0;
-			if (!args->verbose)
-				continue;
-			fprintf(stderr,
-				"want %s (%s)\n", sha1_to_hex(remote),
-				ref->name);
+			print_verbose(args, "want %s (%s)", sha1_to_hex(remote),
+				      ref->name);
 			continue;
 		}
-		if (!args->verbose)
-			continue;
-		fprintf(stderr,
-			"already have %s (%s)\n", sha1_to_hex(remote),
-			ref->name);
+		print_verbose(args, "already have %s (%s)", sha1_to_hex(remote),
+			      ref->name);
 	}
 	return retval;
 }
@@ -810,39 +814,32 @@ static struct ref *do_fetch_pack(struct fetch_pack_args *args,
 	if ((args->depth > 0 || is_repository_shallow()) && !server_supports("shallow"))
 		die("Server does not support shallow clients");
 	if (server_supports("multi_ack_detailed")) {
-		if (args->verbose)
-			fprintf(stderr, "Server supports multi_ack_detailed\n");
+		print_verbose(args, "Server supports multi_ack_detailed");
 		multi_ack = 2;
 		if (server_supports("no-done")) {
-			if (args->verbose)
-				fprintf(stderr, "Server supports no-done\n");
+			print_verbose(args, "Server supports no-done");
 			if (args->stateless_rpc)
 				no_done = 1;
 		}
 	}
 	else if (server_supports("multi_ack")) {
-		if (args->verbose)
-			fprintf(stderr, "Server supports multi_ack\n");
+		print_verbose(args, "Server supports multi_ack");
 		multi_ack = 1;
 	}
 	if (server_supports("side-band-64k")) {
-		if (args->verbose)
-			fprintf(stderr, "Server supports side-band-64k\n");
+		print_verbose(args, "Server supports side-band-64k");
 		use_sideband = 2;
 	}
 	else if (server_supports("side-band")) {
-		if (args->verbose)
-			fprintf(stderr, "Server supports side-band\n");
+		print_verbose(args, "Server supports side-band");
 		use_sideband = 1;
 	}
 	if (server_supports("allow-tip-sha1-in-want")) {
-		if (args->verbose)
-			fprintf(stderr, "Server supports allow-tip-sha1-in-want\n");
+		print_verbose(args, "Server supports allow-tip-sha1-in-want");
 		allow_unadvertised_object_request |= ALLOW_TIP_SHA1;
 	}
 	if (server_supports("allow-reachable-sha1-in-want")) {
-		if (args->verbose)
-			fprintf(stderr, "Server supports allow-reachable-sha1-in-want\n");
+		print_verbose(args, "Server supports allow-reachable-sha1-in-want");
 		allow_unadvertised_object_request |= ALLOW_REACHABLE_SHA1;
 	}
 	if (!server_supports("thin-pack"))
@@ -851,17 +848,16 @@ static struct ref *do_fetch_pack(struct fetch_pack_args *args,
 		args->no_progress = 0;
 	if (!server_supports("include-tag"))
 		args->include_tag = 0;
-	if (server_supports("ofs-delta")) {
-		if (args->verbose)
-			fprintf(stderr, "Server supports ofs-delta\n");
-	} else
+	if (server_supports("ofs-delta"))
+		print_verbose(args, "Server supports ofs-delta");
+	else
 		prefer_ofs_delta = 0;
 
 	if ((agent_feature = server_feature_value("agent", &agent_len))) {
 		agent_supported = 1;
-		if (args->verbose && agent_len)
-			fprintf(stderr, "Server version is %.*s\n",
-				agent_len, agent_feature);
+		if (agent_len)
+			print_verbose(args, "Server version is %.*s",
+				      agent_len, agent_feature);
 	}
 
 	if (everything_local(args, &ref, sought, nr_sought)) {
-- 
2.8.2.524.g6ff3d78

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