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-rwxr-xr-xt/t7418-submodule-sparse-gitmodules.sh122
1 files changed, 122 insertions, 0 deletions
diff --git a/t/t7418-submodule-sparse-gitmodules.sh b/t/t7418-submodule-sparse-gitmodules.sh
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+++ b/t/t7418-submodule-sparse-gitmodules.sh
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+#!/bin/sh
+#
+# Copyright (C) 2018 Antonio Ospite <ao2@ao2.it>
+#
+
+test_description='Test reading/writing .gitmodules when not in the working tree
+
+This test verifies that, when .gitmodules is in the current branch but is not
+in the working tree reading from it still works but writing to it does not.
+
+The test setup uses a sparse checkout, however the same scenario can be set up
+also by committing .gitmodules and then just removing it from the filesystem.
+'
+
+. ./test-lib.sh
+
+test_expect_success 'sparse checkout setup which hides .gitmodules' '
+ git init upstream &&
+ git init submodule &&
+ (cd submodule &&
+ echo file >file &&
+ git add file &&
+ test_tick &&
+ git commit -m "Add file"
+ ) &&
+ (cd upstream &&
+ git submodule add ../submodule &&
+ test_tick &&
+ git commit -m "Add submodule"
+ ) &&
+ git clone upstream super &&
+ (cd super &&
+ cat >.git/info/sparse-checkout <<-\EOF &&
+ /*
+ !/.gitmodules
+ EOF
+ git config core.sparsecheckout true &&
+ git read-tree -m -u HEAD &&
+ test_path_is_missing .gitmodules
+ )
+'
+
+test_expect_success 'reading gitmodules config file when it is not checked out' '
+ echo "../submodule" >expect &&
+ git -C super submodule--helper config submodule.submodule.url >actual &&
+ test_cmp expect actual
+'
+
+test_expect_success 'not writing gitmodules config file when it is not checked out' '
+ test_must_fail git -C super submodule--helper config submodule.submodule.url newurl &&
+ test_path_is_missing super/.gitmodules
+'
+
+test_expect_success 'initialising submodule when the gitmodules config is not checked out' '
+ test_must_fail git -C super config submodule.submodule.url &&
+ git -C super submodule init &&
+ git -C super config submodule.submodule.url >actual &&
+ echo "$(pwd)/submodule" >expect &&
+ test_cmp expect actual
+'
+
+test_expect_success 'updating submodule when the gitmodules config is not checked out' '
+ test_path_is_missing super/submodule/file &&
+ git -C super submodule update &&
+ test_cmp submodule/file super/submodule/file
+'
+
+ORIG_SUBMODULE=$(git -C submodule rev-parse HEAD)
+ORIG_UPSTREAM=$(git -C upstream rev-parse HEAD)
+ORIG_SUPER=$(git -C super rev-parse HEAD)
+
+test_expect_success 're-updating submodule when the gitmodules config is not checked out' '
+ test_when_finished "git -C submodule reset --hard $ORIG_SUBMODULE;
+ git -C upstream reset --hard $ORIG_UPSTREAM;
+ git -C super reset --hard $ORIG_SUPER;
+ git -C upstream submodule update --remote;
+ git -C super pull;
+ git -C super submodule update --remote" &&
+ (cd submodule &&
+ echo file2 >file2 &&
+ git add file2 &&
+ test_tick &&
+ git commit -m "Add file2 to submodule"
+ ) &&
+ (cd upstream &&
+ git submodule update --remote &&
+ git add submodule &&
+ test_tick &&
+ git commit -m "Update submodule"
+ ) &&
+ git -C super pull &&
+ # The --for-status options reads the gitmodules config
+ git -C super submodule summary --for-status >actual &&
+ rev1=$(git -C submodule rev-parse --short HEAD) &&
+ rev2=$(git -C submodule rev-parse --short HEAD^) &&
+ cat >expect <<-EOF &&
+ * submodule ${rev1}...${rev2} (1):
+ < Add file2 to submodule
+
+ EOF
+ test_cmp expect actual &&
+ # Test that the update actually succeeds
+ test_path_is_missing super/submodule/file2 &&
+ git -C super submodule update &&
+ test_cmp submodule/file2 super/submodule/file2 &&
+ git -C super status --short >output &&
+ test_must_be_empty output
+'
+
+test_expect_success 'not adding submodules when the gitmodules config is not checked out' '
+ git clone submodule new_submodule &&
+ test_must_fail git -C super submodule add ../new_submodule &&
+ test_path_is_missing .gitmodules
+'
+
+# This test checks that the previous "git submodule add" did not leave the
+# repository in a spurious state when it failed.
+test_expect_success 'init submodule still works even after the previous add failed' '
+ git -C super submodule init
+'
+
+test_done