Merge branch 'ab/clone-no-tags'

"git clone" learned the "--no-tags" option not to fetch all tags
initially, and also set up the tagopt not to follow any tags in
subsequent fetches.

* ab/clone-no-tags:
  tests: rename a test having to do with shallow submodules
  clone: add a --no-tags option to clone without tags
  tests: change "cd ... && git fetch" to "cd &&\n\tgit fetch"

5 files changed, 117 insertions, 14 deletions

diff --git a/Documentation/git-clone.txt b/Documentation/git-clone.txt
index 30052cce49..83c8e9b394 100644
--- a/Documentation/git-clone.txt
+++ b/Documentation/git-clone.txt
@@ -13,7 +13,7 @@ SYNOPSIS
 	  [-l] [-s] [--no-hardlinks] [-q] [-n] [--bare] [--mirror]
 	  [-o <name>] [-b <name>] [-u <upload-pack>] [--reference <repository>]
 	  [--dissociate] [--separate-git-dir <git dir>]
-	  [--depth <depth>] [--[no-]single-branch]
+	  [--depth <depth>] [--[no-]single-branch] [--no-tags]
 	  [--recurse-submodules] [--[no-]shallow-submodules]
 	  [--jobs <n>] [--] <repository> [<directory>]
 
@@ -215,6 +215,18 @@ objects from the source repository into a pack in the cloned repository.
 	branch when `--single-branch` clone was made, no remote-tracking
 	branch is created.
 
+--no-tags::
+	Don't clone any tags, and set
+	`remote.<remote>.tagOpt=--no-tags` in the config, ensuring
+	that future `git pull` and `git fetch` operations won't follow
+	any tags. Subsequent explicit tag fetches will still work,
+	(see linkgit:git-fetch[1]).
++
+Can be used in conjunction with `--single-branch` to clone and
+maintain a branch with no references other than a single cloned
+branch. This is useful e.g. to maintain minimal clones of the default
+branch of some repository for search indexing.
+
 --recurse-submodules[=<pathspec]::
 	After the clone is created, initialize and clone submodules
 	within based on the provided pathspec.  If no pathspec is
diff --git a/builtin/clone.c b/builtin/clone.c
index de85b85254..05f52d6f2b 100644
--- a/builtin/clone.c
+++ b/builtin/clone.c
@@ -40,6 +40,7 @@ static const char * const builtin_clone_usage[] = {
 
 static int option_no_checkout, option_bare, option_mirror, option_single_branch = -1;
 static int option_local = -1, option_no_hardlinks, option_shared;
+static int option_no_tags;
 static int option_shallow_submodules;
 static int deepen;
 static char *option_template, *option_depth, *option_since;
@@ -120,6 +121,8 @@ static struct option builtin_clone_options[] = {
 			N_("deepen history of shallow clone, excluding rev")),
 	OPT_BOOL(0, "single-branch", &option_single_branch,
 		    N_("clone only one branch, HEAD or --branch")),
+	OPT_BOOL(0, "no-tags", &option_no_tags,
+		 N_("don't clone any tags, and make later fetches not to follow them")),
 	OPT_BOOL(0, "shallow-submodules", &option_shallow_submodules,
 		    N_("any cloned submodules will be shallow")),
 	OPT_STRING(0, "separate-git-dir", &real_git_dir, N_("gitdir"),
@@ -563,7 +566,7 @@ static struct ref *wanted_peer_refs(const struct ref *refs,
 	} else
 		get_fetch_map(refs, refspec, &tail, 0);
 
-	if (!option_mirror && !option_single_branch)
+	if (!option_mirror && !option_single_branch && !option_no_tags)
 		get_fetch_map(refs, tag_refspec, &tail, 0);
 
 	return local_refs;
@@ -652,7 +655,7 @@ static void update_remote_refs(const struct ref *refs,
 
 	if (refs) {
 		write_remote_refs(mapped_refs);
-		if (option_single_branch)
+		if (option_single_branch && !option_no_tags)
 			write_followtags(refs, msg);
 	}
 
@@ -1035,6 +1038,12 @@ int cmd_clone(int argc, const char **argv, const char *prefix)
 	git_config_set(key.buf, repo);
 	strbuf_reset(&key);
 
+	if (option_no_tags) {
+		strbuf_addf(&key, "remote.%s.tagOpt", option_origin);
+		git_config_set(key.buf, "--no-tags");
+		strbuf_reset(&key);
+	}
+
 	if (option_required_reference.nr || option_optional_reference.nr)
 		setup_reference();
 
diff --git a/contrib/completion/git-completion.bash b/contrib/completion/git-completion.bash
index e77498dd9c..1ed0a09fee 100644
--- a/contrib/completion/git-completion.bash
+++ b/contrib/completion/git-completion.bash
@@ -1319,6 +1319,7 @@ _git_clone ()
 			--template=
 			--depth
 			--single-branch
+			--no-tags
 			--branch
 			--recurse-submodules
 			--no-single-branch
diff --git a/t/t5612-clone-refspec.sh b/t/t5612-clone-refspec.sh
index 7ace2535c8..fac5a73851 100755
--- a/t/t5612-clone-refspec.sh
+++ b/t/t5612-clone-refspec.sh
@@ -17,13 +17,20 @@ test_expect_success 'setup' '
 	echo four >file &&
 	git commit -a -m four &&
 	git checkout master &&
+	git tag five &&
 
 	# default clone
 	git clone . dir_all &&
 
+	# default clone --no-tags
+	git clone --no-tags . dir_all_no_tags &&
+
 	# default --single that follows HEAD=master
 	git clone --single-branch . dir_master &&
 
+	# default --single that follows HEAD=master with no tags
+	git clone --single-branch --no-tags . dir_master_no_tags &&
+
 	# default --single that follows HEAD=side
 	git checkout side &&
 	git clone --single-branch . dir_side &&
@@ -45,6 +52,9 @@ test_expect_success 'setup' '
 	# explicit --single with tag
 	git clone --single-branch --branch two . dir_tag &&
 
+	# explicit --single with tag and --no-tags
+	git clone --single-branch --no-tags --branch two . dir_tag_no_tags &&
+
 	# advance both "master" and "side" branches
 	git checkout side &&
 	echo five >file &&
@@ -59,7 +69,8 @@ test_expect_success 'setup' '
 
 test_expect_success 'by default all branches will be kept updated' '
 	(
-		cd dir_all && git fetch &&
+		cd dir_all &&
+		git fetch &&
 		git for-each-ref refs/remotes/origin |
 		sed -e "/HEAD$/d" \
 		    -e "s|/remotes/origin/|/heads/|" >../actual
@@ -71,28 +82,82 @@ test_expect_success 'by default all branches will be kept updated' '
 
 test_expect_success 'by default no tags will be kept updated' '
 	(
-		cd dir_all && git fetch &&
+		cd dir_all &&
+		git fetch &&
 		git for-each-ref refs/tags >../actual
 	) &&
 	git for-each-ref refs/tags >expect &&
-	test_must_fail test_cmp expect actual
+	test_must_fail test_cmp expect actual &&
+	test_line_count = 2 actual
+'
+
+test_expect_success 'clone with --no-tags' '
+	(
+		cd dir_all_no_tags &&
+		git fetch &&
+		git for-each-ref refs/tags >../actual
+	) &&
+	>expect &&
+	test_cmp expect actual
 '
 
 test_expect_success '--single-branch while HEAD pointing at master' '
 	(
-		cd dir_master && git fetch &&
+		cd dir_master &&
+		git fetch &&
 		git for-each-ref refs/remotes/origin |
 		sed -e "/HEAD$/d" \
 		    -e "s|/remotes/origin/|/heads/|" >../actual
 	) &&
 	# only follow master
 	git for-each-ref refs/heads/master >expect &&
-	test_cmp expect actual
+	# get & check latest tags
+	test_cmp expect actual &&
+	(
+		cd dir_master &&
+		git fetch --tags &&
+		git for-each-ref refs/tags >../actual
+	) &&
+	git for-each-ref refs/tags >expect &&
+	test_cmp expect actual &&
+	test_line_count = 2 actual
+'
+
+test_expect_success '--single-branch while HEAD pointing at master and --no-tags' '
+	(
+		cd dir_master_no_tags &&
+		git fetch &&
+		git for-each-ref refs/remotes/origin |
+		sed -e "/HEAD$/d" \
+		    -e "s|/remotes/origin/|/heads/|" >../actual
+	) &&
+	# only follow master
+	git for-each-ref refs/heads/master >expect &&
+	test_cmp expect actual &&
+	# get tags (noop)
+	(
+		cd dir_master_no_tags &&
+		git fetch &&
+		git for-each-ref refs/tags >../actual
+	) &&
+	>expect &&
+	test_cmp expect actual &&
+	test_line_count = 0 actual &&
+	# get tags with --tags overrides tagOpt
+	(
+		cd dir_master_no_tags &&
+		git fetch --tags &&
+		git for-each-ref refs/tags >../actual
+	) &&
+	git for-each-ref refs/tags >expect &&
+	test_cmp expect actual &&
+	test_line_count = 2 actual
 '
 
 test_expect_success '--single-branch while HEAD pointing at side' '
 	(
-		cd dir_side && git fetch &&
+		cd dir_side &&
+		git fetch &&
 		git for-each-ref refs/remotes/origin |
 		sed -e "/HEAD$/d" \
 		    -e "s|/remotes/origin/|/heads/|" >../actual
@@ -104,7 +169,8 @@ test_expect_success '--single-branch while HEAD pointing at side' '
 
 test_expect_success '--single-branch with explicit --branch side' '
 	(
-		cd dir_side2 && git fetch &&
+		cd dir_side2 &&
+		git fetch &&
 		git for-each-ref refs/remotes/origin |
 		sed -e "/HEAD$/d" \
 		    -e "s|/remotes/origin/|/heads/|" >../actual
@@ -116,16 +182,29 @@ test_expect_success '--single-branch with explicit --branch side' '
 
 test_expect_success '--single-branch with explicit --branch with tag fetches updated tag' '
 	(
-		cd dir_tag && git fetch &&
+		cd dir_tag &&
+		git fetch &&
 		git for-each-ref refs/tags >../actual
 	) &&
 	git for-each-ref refs/tags >expect &&
 	test_cmp expect actual
 '
 
+test_expect_success '--single-branch with explicit --branch with tag fetches updated tag despite --no-tags' '
+	(
+		cd dir_tag_no_tags &&
+		git fetch &&
+		git for-each-ref refs/tags >../actual
+	) &&
+	git for-each-ref refs/tags/two >expect &&
+	test_cmp expect actual &&
+	test_line_count = 1 actual
+'
+
 test_expect_success '--single-branch with --mirror' '
 	(
-		cd dir_mirror && git fetch &&
+		cd dir_mirror &&
+		git fetch &&
 		git for-each-ref refs > ../actual
 	) &&
 	git for-each-ref refs >expect &&
@@ -134,7 +213,8 @@ test_expect_success '--single-branch with --mirror' '
 
 test_expect_success '--single-branch with explicit --branch and --mirror' '
 	(
-		cd dir_mirror_side && git fetch &&
+		cd dir_mirror_side &&
+		git fetch &&
 		git for-each-ref refs > ../actual
 	) &&
 	git for-each-ref refs >expect &&
@@ -143,7 +223,8 @@ test_expect_success '--single-branch with explicit --branch and --mirror' '
 
 test_expect_success '--single-branch with detached' '
 	(
-		cd dir_detached && git fetch &&
+		cd dir_detached &&
+		git fetch &&
 		git for-each-ref refs/remotes/origin |
 		sed -e "/HEAD$/d" \
 		    -e "s|/remotes/origin/|/heads/|" >../actual
diff --git a/t/t5614-clone-submodules.sh b/t/t5614-clone-submodules-shallow.sh
index a87d329656..a87d329656 100755
--- a/t/t5614-clone-submodules.sh
+++ b/t/t5614-clone-submodules-shallow.sh