Merge branch 'jk/index-pack-wo-repo-from-stdin' into maint

"git index-pack --stdin" needs an access to an existing repository,
but "git index-pack file.pack" to generate an .idx file that
corresponds to a packfile does not.

* jk/index-pack-wo-repo-from-stdin:
  index-pack: skip collision check when not in repository
  t: use nongit() function where applicable
  index-pack: complain when --stdin is used outside of a repo
  t5000: extract nongit function to test-lib-functions.sh

builtin/index-pack.c

@@ -787,13 +787,15 @@ static void sha1_object(const void *data, struct object_entry *obj_entry,
 			const unsigned char *sha1)
 {
 	void *new_data = NULL;
-	int collision_test_needed;
+	int collision_test_needed = 0;
 
 	assert(data || obj_entry);
 
+	if (startup_info->have_repository) {
 		read_lock();
 		collision_test_needed = has_sha1_file_with_flags(sha1, HAS_SHA1_QUICK);
 		read_unlock();
+	}
 
 	if (collision_test_needed && !data) {
 		read_lock();
@@ -1730,6 +1732,8 @@ int cmd_index_pack(int argc, const char **argv, const char *prefix)
 		usage(index_pack_usage);
 	if (fix_thin_pack && !from_stdin)
 		die(_("--fix-thin cannot be used without --stdin"));
+	if (from_stdin && !startup_info->have_repository)
+		die(_("--stdin requires a git repository"));
 	if (!index_name && pack_name)
 		index_name = derive_filename(pack_name, ".idx", &index_name_buf);
 	if (keep_msg && !keep_name && pack_name)

t/t1308-config-set.sh

@@ -219,14 +219,8 @@ test_expect_success 'check line errors for malformed values' '
 '
 
 test_expect_success 'error on modifying repo config without repo' '
-	mkdir no-repo &&
-	(
-		GIT_CEILING_DIRECTORIES=$(pwd) &&
-		export GIT_CEILING_DIRECTORIES &&
-		cd no-repo &&
-		test_must_fail git config a.b c 2>err &&
+	nongit test_must_fail git config a.b c 2>err &&
 	grep "not in a git directory" err
-	)
 '
 
 cmdline_config="'foo.bar=from-cmdline'"

t/t5000-tar-tree.sh

@@ -94,20 +94,6 @@ check_tar() {
 	'
 }
 
-# run "$@" inside a non-git directory
-nongit () {
-	test -d non-repo ||
-	mkdir non-repo ||
-	return 1
-
-	(
-		GIT_CEILING_DIRECTORIES=$(pwd) &&
-		export GIT_CEILING_DIRECTORIES &&
-		cd non-repo &&
-		"$@"
-	)
-}
-
 test_expect_success \
     'populate workdir' \
     'mkdir a &&

t/t5300-pack-object.sh

@@ -406,6 +406,21 @@ test_expect_success 'verify resulting packs' '
 	git verify-pack test-11-*.pack
 '
 
+test_expect_success 'set up pack for non-repo tests' '
+	# make sure we have a pack with no matching index file
+	cp test-1-*.pack foo.pack
+'
+
+test_expect_success 'index-pack --stdin complains of non-repo' '
+	nongit test_must_fail git index-pack --stdin <foo.pack &&
+	test_path_is_missing non-repo/.git
+'
+
+test_expect_success 'index-pack <pack> works in non-repo' '
+	nongit git index-pack ../foo.pack &&
+	test_path_is_file foo.idx
+'
+
 #
 # WARNING!
 #

t/t9100-git-svn-basic.sh

@@ -17,25 +17,12 @@ case "$GIT_SVN_LC_ALL" in
 	;;
 esac
 
-deepdir=nothing-above
-ceiling=$PWD
-
 test_expect_success 'git svn --version works anywhere' '
-	mkdir -p "$deepdir" && (
-		GIT_CEILING_DIRECTORIES="$ceiling" &&
-		export GIT_CEILING_DIRECTORIES &&
-		cd "$deepdir" &&
-		git svn --version
-	)
+	nongit git svn --version
 '
 
 test_expect_success 'git svn help works anywhere' '
-	mkdir -p "$deepdir" && (
-		GIT_CEILING_DIRECTORIES="$ceiling" &&
-		export GIT_CEILING_DIRECTORIES &&
-		cd "$deepdir" &&
-		git svn help
-	)
+	nongit git svn help
 '
 
 test_expect_success \

t/t9902-completion.sh

@@ -257,12 +257,7 @@ test_expect_success SYMLINKS '__gitdir - resulting path avoids symlinks' '
 '
 
 test_expect_success '__gitdir - not a git repository' '
-	(
-		cd subdir/subsubdir &&
-		GIT_CEILING_DIRECTORIES="$TRASH_DIRECTORY" &&
-		export GIT_CEILING_DIRECTORIES &&
-		test_must_fail __gitdir
-	)
+	nongit test_must_fail __gitdir
 '
 
 test_expect_success '__gitcomp - trailing space - options' '

t/test-lib-functions.sh

@@ -994,3 +994,17 @@ test_copy_bytes () {
 		}
 	' - "$1"
 }
+
+# run "$@" inside a non-git directory
+nongit () {
+	test -d non-repo ||
+	mkdir non-repo ||
+	return 1
+
+	(
+		GIT_CEILING_DIRECTORIES=$(pwd) &&
+		export GIT_CEILING_DIRECTORIES &&
+		cd non-repo &&
+		"$@"
+	)
+}