[PATCH v3 5/5] clone: --bundle-uri cannot be combined with --depth

["Derrick Stolee via GitGitGadget" <gitgitgadget@gmail.com>]

From: Derrick Stolee <derrickstolee@github.com>

A previous change added the '--bundle-uri' option, but did not check
if the --depth parameter was included. Since bundles are not compatible
with shallow clones, provide an error message to the user who is
attempting this combination.

I am leaving this as its own change, separate from the one that
implements '--bundle-uri', because this is more of an advisory for the
user. There is nothing wrong with bootstrapping with bundles and then
fetching a shallow clone. However, that is likely going to involve too
much work for the client _and_ the server. The client will download all
of this bundle information containing the full history of the
repository only to ignore most of it. The server will get a shallow
fetch request, but with a list of haves that might cause a more painful
computation of that shallow pack-file.

Reviewed-by: Josh Steadmon <steadmon@google.com>
Signed-off-by: Derrick Stolee <derrickstolee@github.com>
---
 Documentation/git-clone.txt | 3 ++-
 builtin/clone.c             | 3 +++
 t/t5606-clone-options.sh    | 8 ++++++++
 3 files changed, 13 insertions(+), 1 deletion(-)

diff --git a/Documentation/git-clone.txt b/Documentation/git-clone.txt
index 60fedf7eb5e..d032d971dd7 100644
--- a/Documentation/git-clone.txt
+++ b/Documentation/git-clone.txt
@@ -327,7 +327,8 @@ or `--mirror` is given)
 	Before fetching from the remote, fetch a bundle from the given
 	`<uri>` and unbundle the data into the local repository. The refs
 	in the bundle will be stored under the hidden `refs/bundle/*`
-	namespace.
+	namespace. This option is incompatible with `--depth`,
+	`--shallow-since`, and `--shallow-exclude`.
 
 :git-clone: 1
 include::urls.txt[]
diff --git a/builtin/clone.c b/builtin/clone.c
index 4224d562758..4463789680b 100644
--- a/builtin/clone.c
+++ b/builtin/clone.c
@@ -937,6 +937,9 @@ int cmd_clone(int argc, const char **argv, const char *prefix)
 		option_no_checkout = 1;
 	}
 
+	if (bundle_uri && deepen)
+		die(_("--bundle-uri is incompatible with --depth, --shallow-since, and --shallow-exclude"));
+
 	repo_name = argv[0];
 
 	path = get_repo_path(repo_name, &is_bundle);
diff --git a/t/t5606-clone-options.sh b/t/t5606-clone-options.sh
index 8f676d6b0c0..f6bb02ab947 100755
--- a/t/t5606-clone-options.sh
+++ b/t/t5606-clone-options.sh
@@ -58,6 +58,14 @@ test_expect_success 'disallows --bare with --separate-git-dir' '
 
 '
 
+test_expect_success 'disallows --bundle-uri with shallow options' '
+	for option in --depth=1 --shallow-since=01-01-2000 --shallow-exclude=HEAD
+	do
+		test_must_fail git clone --bundle-uri=bundle $option from to 2>err &&
+		grep "bundle-uri is incompatible" err || return 1
+	done
+'
+
 test_expect_success 'reject cloning shallow repository' '
 	test_when_finished "rm -rf repo" &&
 	test_must_fail git clone --reject-shallow shallow-repo out 2>err &&
-- 
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