[PATCHv3] submodule update: run custom update script for initial populating as well

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In 1b4735d9f3 (submodule: no [--merge|--rebase] when newly cloned,
2011-02-17), all actions were defaulted to checkout for populating
a submodule initially, because merging or rebasing makes no sense
in that situation.

Other commands however do make sense, such as the custom command
that was added later (6cb5728c43, submodule update: allow custom
command to update submodule working tree, 2013-07-03).

I am unsure about the "none" command, as I can see an initial
checkout there as a useful thing. On the other hand going strictly
by our own documentation, we should do nothing in case of "none"
as well, because the user asked for it.

Reported-by: Han-Wen Nienhuys <hanwen@xxxxxxxxxx>
Signed-off-by: Stefan Beller <sbeller@xxxxxxxxxx>
---

 Thanks, Brandon, for spotting the unneeded subshell.
 I also fixed the && chaining along the way.
 
 Thanks,
 Stefan

 git-submodule.sh            |  5 ++++-
 t/t7406-submodule-update.sh | 12 ++++++++++++
 2 files changed, 16 insertions(+), 1 deletion(-)

diff --git a/git-submodule.sh b/git-submodule.sh
index 9788175979..63fc4fe9bc 100755
--- a/git-submodule.sh
+++ b/git-submodule.sh
@@ -607,7 +607,10 @@ cmd_update()
 		if test $just_cloned -eq 1
 		then
 			subsha1=
-			update_module=checkout
+			case "$update_module" in
+			merge | rebase | none)
+				update_module=checkout ;;
+			esac
 		else
 			subsha1=$(sanitize_submodule_env; cd "$sm_path" &&
 				git rev-parse --verify HEAD) ||
diff --git a/t/t7406-submodule-update.sh b/t/t7406-submodule-update.sh
index 725bbed1f8..347857fa7c 100755
--- a/t/t7406-submodule-update.sh
+++ b/t/t7406-submodule-update.sh
@@ -441,6 +441,16 @@ test_expect_success 'submodule update - command in .git/config catches failure -
 	test_i18ncmp actual expect
 '
 
+test_expect_success 'submodule update - command run for initial population of submodule' '
+	cat <<-\ EOF >expect
+	Execution of '\''false $submodulesha1'\'' failed in submodule path '\''submodule'\''
+	EOF &&
+	rm -rf super/submodule &&
+	test_must_fail git -C super submodule update >../actual &&
+	test_cmp expect actual &&
+	git -C super submodule update --checkout
+'
+
 cat << EOF >expect
 Execution of 'false $submodulesha1' failed in submodule path '../super/submodule'
 Failed to recurse into submodule path '../super'
@@ -493,6 +503,7 @@ test_expect_success 'submodule init picks up merge' '
 '
 
 test_expect_success 'submodule update --merge  - ignores --merge  for new submodules' '
+	test_config -C super submodule.submodule.update checkout &&
 	(cd super &&
 	 rm -rf submodule &&
 	 git submodule update submodule &&
@@ -505,6 +516,7 @@ test_expect_success 'submodule update --merge  - ignores --merge  for new submod
 '
 
 test_expect_success 'submodule update --rebase - ignores --rebase for new submodules' '
+	test_config -C super submodule.submodule.update checkout &&
 	(cd super &&
 	 rm -rf submodule &&
 	 git submodule update submodule &&
-- 
2.11.0.495.g04f60290a0.dirty




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