"git pull" supports a --recurse-submodules option but does not parse the
submodule.recurse configuration item to set the default for that option.
Meanwhile "git fetch" does support submodule.recurse, producing
confusing behavior: when submodule.recurse is enabled, "git pull"
recursively fetches submodules but does not update them after fetch.

Handle submodule.recurse in "git pull" to fix this.

Reported-by: Magnus Homann <mag...@homann.se>
Signed-off-by: Nicolas Morey-Chaisemartin <nico...@morey-chaisemartin.com>
---
 builtin/pull.c            |  4 ++++
 t/t5572-pull-submodule.sh | 32 ++++++++++++++++++++++++++++++++
 2 files changed, 36 insertions(+)

diff --git a/builtin/pull.c b/builtin/pull.c
index 9ef1ab501..6f772e8a2 100644
--- a/builtin/pull.c
+++ b/builtin/pull.c
@@ -325,6 +325,10 @@ static int git_pull_config(const char *var, const char 
*value, void *cb)
        if (!strcmp(var, "rebase.autostash")) {
                config_autostash = git_config_bool(var, value);
                return 0;
+       } else if (!strcmp(var, "submodule.recurse")) {
+               recurse_submodules = git_config_bool(var, value) ?
+                       RECURSE_SUBMODULES_ON : RECURSE_SUBMODULES_OFF;
+               return 0;
        }
        return git_default_config(var, value, cb);
 }
diff --git a/t/t5572-pull-submodule.sh b/t/t5572-pull-submodule.sh
index 077eb07e1..321bd37de 100755
--- a/t/t5572-pull-submodule.sh
+++ b/t/t5572-pull-submodule.sh
@@ -65,6 +65,38 @@ test_expect_success 'recursive pull updates working tree' '
        test_path_is_file super/sub/merge_strategy.t
 '
 
+test_expect_success "submodule.recurse option triggers recursive pull" '
+       test_commit -C child merge_strategy_2 &&
+       git -C parent submodule update --remote &&
+       git -C parent add sub &&
+       git -C parent commit -m "update submodule" &&
+
+       git -C super -c submodule.recurse pull --no-rebase &&
+       test_path_is_file super/sub/merge_strategy_2.t
+'
+
+test_expect_success " --[no-]recurse-submodule and submodule.recurse" '
+       test_commit -C child merge_strategy_3 &&
+       git -C parent submodule update --remote &&
+       git -C parent add sub &&
+       git -C parent commit -m "update submodule" &&
+
+       git -C super -c submodule.recurse pull --no-recurse-submodules 
--no-rebase &&
+       test_path_is_missing super/sub/merge_strategy_3.t &&
+       git -C super -c submodule.recurse=false pull --recurse-submodules 
--no-rebase &&
+       test_path_is_file super/sub/merge_strategy_3.t &&
+
+       test_commit -C child merge_strategy_4 &&
+       git -C parent submodule update --remote &&
+       git -C parent add sub &&
+       git -C parent commit -m "update submodule" &&
+
+       git -C super -c submodule.recurse=false pull --no-recurse-submodules 
--no-rebase &&
+       test_path_is_missing super/sub/merge_strategy_4.t &&
+       git -C super -c submodule.recurse=true pull --recurse-submodules 
--no-rebase &&
+       test_path_is_file super/sub/merge_strategy_4.t
+'
+
 test_expect_success 'recursive rebasing pull' '
        # change upstream
        test_commit -C child rebase_strategy &&
-- 
2.14.1.461.g503560879

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