Merge branch 'jc/compression-config' into maint

Compression setting for producing packfiles were spread across
three codepaths, one of which did not honor any configuration.
Unify these so that all of them honor core.compression and
pack.compression variables the same way.

* jc/compression-config:
  compression: unify pack.compression configuration parsing

9 files changed, 158 insertions, 31 deletions

diff --git a/builtin/pack-objects.c b/builtin/pack-objects.c
index 0fd52bd6b..8841f8b36 100644
--- a/builtin/pack-objects.c
+++ b/builtin/pack-objects.c
@@ -61,8 +61,6 @@ static int delta_search_threads;
 static int pack_to_stdout;
 static int num_preferred_base;
 static struct progress *progress_state;
-static int pack_compression_level = Z_DEFAULT_COMPRESSION;
-static int pack_compression_seen;
 
 static struct packed_git *reuse_packfile;
 static uint32_t reuse_packfile_objects;
@@ -2368,16 +2366,6 @@ static int git_pack_config(const char *k, const char *v, void *cb)
 		depth = git_config_int(k, v);
 		return 0;
 	}
-	if (!strcmp(k, "pack.compression")) {
-		int level = git_config_int(k, v);
-		if (level == -1)
-			level = Z_DEFAULT_COMPRESSION;
-		else if (level < 0 || level > Z_BEST_COMPRESSION)
-			die("bad pack compression level %d", level);
-		pack_compression_level = level;
-		pack_compression_seen = 1;
-		return 0;
-	}
 	if (!strcmp(k, "pack.deltacachesize")) {
 		max_delta_cache_size = git_config_int(k, v);
 		return 0;
@@ -2869,8 +2857,6 @@ int cmd_pack_objects(int argc, const char **argv, const char *prefix)
 
 	reset_pack_idx_option(&pack_idx_opts);
 	git_config(git_pack_config, NULL);
-	if (!pack_compression_seen && core_compression_seen)
-		pack_compression_level = core_compression_level;
 
 	progress = isatty(2);
 	argc = parse_options(argc, argv, prefix, pack_objects_options,
diff --git a/bulk-checkin.c b/bulk-checkin.c
index 4347f5c76..991b4a13e 100644
--- a/bulk-checkin.c
+++ b/bulk-checkin.c
@@ -7,8 +7,6 @@
 #include "pack.h"
 #include "strbuf.h"
 
-static int pack_compression_level = Z_DEFAULT_COMPRESSION;
-
 static struct bulk_checkin_state {
 	unsigned plugged:1;
 
diff --git a/cache.h b/cache.h
index a50a61a19..b14c0e8e3 100644
--- a/cache.h
+++ b/cache.h
@@ -670,7 +670,7 @@ extern const char *git_attributes_file;
 extern const char *git_hooks_path;
 extern int zlib_compression_level;
 extern int core_compression_level;
-extern int core_compression_seen;
+extern int pack_compression_level;
 extern size_t packed_git_window_size;
 extern size_t packed_git_limit;
 extern size_t delta_base_cache_limit;
diff --git a/config.c b/config.c
index 83fdecb1b..2f1aef742 100644
--- a/config.c
+++ b/config.c
@@ -66,6 +66,8 @@ static struct key_value_info *current_config_kvi;
  */
 static enum config_scope current_parsing_scope;
 
+static int core_compression_seen;
+static int pack_compression_seen;
 static int zlib_compression_seen;
 
 /*
@@ -865,6 +867,8 @@ static int git_default_core_config(const char *var, const char *value)
 		core_compression_seen = 1;
 		if (!zlib_compression_seen)
 			zlib_compression_level = level;
+		if (!pack_compression_seen)
+			pack_compression_level = level;
 		return 0;
 	}
 
@@ -1125,6 +1129,18 @@ int git_default_config(const char *var, const char *value, void *dummy)
 		pack_size_limit_cfg = git_config_ulong(var, value);
 		return 0;
 	}
+
+	if (!strcmp(var, "pack.compression")) {
+		int level = git_config_int(var, value);
+		if (level == -1)
+			level = Z_DEFAULT_COMPRESSION;
+		else if (level < 0 || level > Z_BEST_COMPRESSION)
+			die(_("bad pack compression level %d"), level);
+		pack_compression_level = level;
+		pack_compression_seen = 1;
+		return 0;
+	}
+
 	/* Add other config variables here and to Documentation/config.txt. */
 	return 0;
 }
diff --git a/environment.c b/environment.c
index 0935ec696..4bce3eebf 100644
--- a/environment.c
+++ b/environment.c
@@ -34,7 +34,7 @@ const char *git_attributes_file;
 const char *git_hooks_path;
 int zlib_compression_level = Z_BEST_SPEED;
 int core_compression_level;
-int core_compression_seen;
+int pack_compression_level = Z_DEFAULT_COMPRESSION;
 int fsync_object_files;
 size_t packed_git_window_size = DEFAULT_PACKED_GIT_WINDOW_SIZE;
 size_t packed_git_limit = DEFAULT_PACKED_GIT_LIMIT;
diff --git a/fast-import.c b/fast-import.c
index cb545d7df..f561ba833 100644
--- a/fast-import.c
+++ b/fast-import.c
@@ -284,8 +284,6 @@ static unsigned long max_depth = 10;
 static off_t max_packsize;
 static int unpack_limit = 100;
 static int force_update;
-static int pack_compression_level = Z_DEFAULT_COMPRESSION;
-static int pack_compression_seen;
 
 /* Stats and misc. counters */
 static uintmax_t alloc_count;
@@ -3381,15 +3379,6 @@ static void git_pack_config(void)
 		if (max_depth > MAX_DEPTH)
 			max_depth = MAX_DEPTH;
 	}
-	if (!git_config_get_int("pack.compression", &pack_compression_level)) {
-		if (pack_compression_level == -1)
-			pack_compression_level = Z_DEFAULT_COMPRESSION;
-		else if (pack_compression_level < 0 ||
-			 pack_compression_level > Z_BEST_COMPRESSION)
-			git_die_config("pack.compression",
-					"bad pack compression level %d", pack_compression_level);
-		pack_compression_seen = 1;
-	}
 	if (!git_config_get_int("pack.indexversion", &indexversion_value)) {
 		pack_idx_opts.version = indexversion_value;
 		if (pack_idx_opts.version > 2)
@@ -3454,8 +3443,6 @@ int cmd_main(int argc, const char **argv)
 	setup_git_directory();
 	reset_pack_idx_option(&pack_idx_opts);
 	git_pack_config();
-	if (!pack_compression_seen && core_compression_seen)
-		pack_compression_level = core_compression_level;
 
 	alloc_objects(object_entry_alloc);
 	strbuf_init(&command_buf, 0);
diff --git a/t/t1050-large.sh b/t/t1050-large.sh
index 096dbffec..6fd264cff 100755
--- a/t/t1050-large.sh
+++ b/t/t1050-large.sh
@@ -5,6 +5,12 @@ test_description='adding and checking out large blobs'
 
 . ./test-lib.sh
 
+# This should be moved to test-lib.sh together with the
+# copy in t0021 after both topics have graduated to 'master'.
+file_size () {
+	perl -e 'print -s $ARGV[0]' "$1"
+}
+
 test_expect_success setup '
 	# clone does not allow us to pass core.bigfilethreshold to
 	# new repos, so set core.bigfilethreshold globally
@@ -17,6 +23,29 @@ test_expect_success setup '
 	export GIT_ALLOC_LIMIT
 '
 
+# add a large file with different settings
+while read expect config
+do
+	test_expect_success "add with $config" '
+		test_when_finished "rm -f .git/objects/pack/pack-*.* .git/index" &&
+		git $config add large1 &&
+		sz=$(file_size .git/objects/pack/pack-*.pack) &&
+		case "$expect" in
+		small) test "$sz" -le 100000 ;;
+		large) test "$sz" -ge 100000 ;;
+		esac
+	'
+done <<\EOF
+large -c core.compression=0
+small -c core.compression=9
+large -c core.compression=0 -c pack.compression=0
+large -c core.compression=9 -c pack.compression=0
+small -c core.compression=0 -c pack.compression=9
+small -c core.compression=9 -c pack.compression=9
+large -c pack.compression=0
+small -c pack.compression=9
+EOF
+
 test_expect_success 'add a large file or two' '
 	git add large1 huge large2 &&
 	# make sure we got a single packfile and no loose objects
diff --git a/t/t5315-pack-objects-compression.sh b/t/t5315-pack-objects-compression.sh
new file mode 100755
index 000000000..34c47dae0
--- /dev/null
+++ b/t/t5315-pack-objects-compression.sh
@@ -0,0 +1,44 @@
+#!/bin/sh
+
+test_description='pack-object compression configuration'
+
+. ./test-lib.sh
+
+# This should be moved to test-lib.sh together with the
+# copy in t0021 after both topics have graduated to 'master'.
+file_size () {
+	perl -e 'print -s $ARGV[0]' "$1"
+}
+
+test_expect_success setup '
+	printf "%2000000s" X |
+	git hash-object -w --stdin >object-name &&
+	# make sure it resulted in a loose object
+	ob=$(sed -e "s/\(..\).*/\1/" object-name) &&
+	ject=$(sed -e "s/..\(.*\)/\1/" object-name) &&
+	test -f .git/objects/$ob/$ject
+'
+
+while read expect config
+do
+	test_expect_success "pack-objects with $config" '
+		test_when_finished "rm -f pack-*.*" &&
+		git $config pack-objects pack <object-name &&
+		sz=$(file_size pack-*.pack) &&
+		case "$expect" in
+		small) test "$sz" -le 100000 ;;
+		large) test "$sz" -ge 100000 ;;
+		esac
+	'
+done <<\EOF
+large -c core.compression=0
+small -c core.compression=9
+large -c core.compression=0 -c pack.compression=0
+large -c core.compression=9 -c pack.compression=0
+small -c core.compression=0 -c pack.compression=9
+small -c core.compression=9 -c pack.compression=9
+large -c pack.compression=0
+small -c pack.compression=9
+EOF
+
+test_done
diff --git a/t/t9303-fast-import-compression.sh b/t/t9303-fast-import-compression.sh
new file mode 100755
index 000000000..856219f46
--- /dev/null
+++ b/t/t9303-fast-import-compression.sh
@@ -0,0 +1,67 @@
+#!/bin/sh
+
+test_description='compression setting of fast-import utility'
+. ./test-lib.sh
+
+# This should be moved to test-lib.sh together with the
+# copy in t0021 after both topics have graduated to 'master'.
+file_size () {
+	perl -e 'print -s $ARGV[0]' "$1"
+}
+
+import_large () {
+	(
+		echo blob
+		echo "data <<EOD"
+		printf "%2000000s\n" "$*"
+		echo EOD
+	) | git "$@" fast-import
+}
+
+while read expect config
+do
+	test_expect_success "fast-import (packed) with $config" '
+		test_when_finished "rm -f .git/objects/pack/pack-*.*" &&
+		test_when_finished "rm -rf .git/objects/??" &&
+		import_large -c fastimport.unpacklimit=0 $config &&
+		sz=$(file_size .git/objects/pack/pack-*.pack) &&
+		case "$expect" in
+		small) test "$sz" -le 100000 ;;
+		large) test "$sz" -ge 100000 ;;
+		esac
+	'
+done <<\EOF
+large -c core.compression=0
+small -c core.compression=9
+large -c core.compression=0 -c pack.compression=0
+large -c core.compression=9 -c pack.compression=0
+small -c core.compression=0 -c pack.compression=9
+small -c core.compression=9 -c pack.compression=9
+large -c pack.compression=0
+small -c pack.compression=9
+EOF
+
+while read expect config
+do
+	test_expect_success "fast-import (loose) with $config" '
+		test_when_finished "rm -f .git/objects/pack/pack-*.*" &&
+		test_when_finished "rm -rf .git/objects/??" &&
+		import_large -c fastimport.unpacklimit=9 $config &&
+		sz=$(file_size .git/objects/??/????*) &&
+		case "$expect" in
+		small) test "$sz" -le 100000 ;;
+		large) test "$sz" -ge 100000 ;;
+		esac
+	'
+done <<\EOF
+large -c core.compression=0
+small -c core.compression=9
+large -c core.compression=0 -c core.loosecompression=0
+large -c core.compression=9 -c core.loosecompression=0
+small -c core.compression=0 -c core.loosecompression=9
+small -c core.compression=9 -c core.loosecompression=9
+large -c core.loosecompression=0
+small -c core.loosecompression=9
+EOF
+
+test_done