From: Lars Schneider <larsxschnei...@gmail.com>

"git clone --recursive --depth 1 --single-branch <url>" clones the
submodules successfully. However, it does not obey "--depth 1" for
submodule cloning.

The following workaround does only work if the used submodule pointer
is on the default branch. Otherwise "git submodule update" fails with
"fatal: reference is not a tree:" and "Unable to checkout".
git clone --depth 1 --single-branch <url>
cd <repo-name>
git submodule update --init --recursive --depth 1

Signed-off-by: Lars Schneider <larsxschnei...@gmail.com>
---
 t/t7412-submodule-recursive.sh | 64 ++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 64 insertions(+)
 create mode 100755 t/t7412-submodule-recursive.sh

diff --git a/t/t7412-submodule-recursive.sh b/t/t7412-submodule-recursive.sh
new file mode 100755
index 0000000..c639f96
--- /dev/null
+++ b/t/t7412-submodule-recursive.sh
@@ -0,0 +1,64 @@
+#!/bin/sh
+
+test_description='Test shallow cloning of repos with submodules'
+
+. ./test-lib.sh
+
+test_expect_success setup '
+       git checkout -b master &&
+       echo file >file &&
+       git add file &&
+       test_tick &&
+       git commit -m "master commit" &&
+
+       git checkout -b branch &&
+       echo file >branch-file &&
+       git add branch-file &&
+       test_tick &&
+       git commit -m "branch commit" &&
+
+       git checkout master &&
+
+       git clone . repo &&
+       (
+               cd repo &&
+               git submodule add ../. submodule &&
+               (
+                       cd submodule &&
+                       git checkout branch
+               ) &&
+               git add submodule &&
+               test_tick &&
+               git commit -m "submodule"
+       )
+'
+
+test_expect_failure shallow-clone-recursive '
+       URL="file://$(pwd | sed "s/[[:space:]]/%20/g")/repo" &&
+       echo $URL &&
+       git clone --recursive --depth 1 --single-branch $URL clone-recursive &&
+       (
+               cd "clone-recursive" &&
+               git log --oneline >lines &&
+               test_line_count = 1 lines
+       ) &&
+       (
+               cd "clone-recursive/submodule" &&
+               git log --oneline >lines &&
+               test_line_count = 1 lines
+       )
+'
+
+test_expect_failure shallow-clone-recursive-workaround '
+       URL="file://$(pwd | sed "s/[[:space:]]/%20/g")/repo" &&
+       echo $URL &&
+       git clone --depth 1 --single-branch $URL clone-recursive-workaround &&
+       (
+               cd "clone-recursive-workaround" &&
+               git log --oneline >lines &&
+               test_line_count = 1 lines &&
+               git submodule update --init --recursive --depth 1
+       )
+'
+
+test_done
-- 
2.5.1

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