submodule update: respect depth in subsequent fetches

When depth is given the user may have a reasonable expectation that
any remote operation is using the given depth. Add a test to demonstrate
we still get the desired sha1 even if the depth is too short to
include the actual commit.

Signed-off-by: Stefan Beller <sbeller@google.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

diff --git a/git-submodule.sh b/git-submodule.sh
index 2b23ce6..40639ee 100755 (executable)
--- a/git-submodule.sh
+++ b/git-submodule.sh
@@ -479,7 +479,8 @@ fetch_in_submodule () (
        '')
                git fetch ;;
        *)
-               git fetch $(get_default_remote) "$2" ;;
+               shift
+               git fetch $(get_default_remote) "$@" ;;
        esac
 )
 
@@ -617,7 +618,7 @@ cmd_update()
                        if test -z "$nofetch"
                        then
                                # Fetch remote before determining tracking $sha1
-                               fetch_in_submodule "$sm_path" ||
+                               fetch_in_submodule "$sm_path" $depth ||
                                die "$(eval_gettext "Unable to fetch in submodule path '\$sm_path'")"
                        fi
                        remote_name=$(sanitize_submodule_env; cd "$sm_path" && get_default_remote)
@@ -640,13 +641,13 @@ cmd_update()
                                # Run fetch only if $sha1 isn't present or it
                                # is not reachable from a ref.
                                is_tip_reachable "$sm_path" "$sha1" ||
-                               fetch_in_submodule "$sm_path" ||
+                               fetch_in_submodule "$sm_path" $depth ||
                                die "$(eval_gettext "Unable to fetch in submodule path '\$displaypath'")"
 
                                # Now we tried the usual fetch, but $sha1 may
                                # not be reachable from any of the refs
                                is_tip_reachable "$sm_path" "$sha1" ||
-                               fetch_in_submodule "$sm_path" "$sha1" ||
+                               fetch_in_submodule "$sm_path" $depth "$sha1" ||
                                die "$(eval_gettext "Fetched in submodule path '\$displaypath', but it did not contain \$sha1. Direct fetching of that commit failed.")"
                        fi
 

diff --git a/t/t7406-submodule-update.sh b/t/t7406-submodule-update.sh
index 8fc3a25..1bb1f43 100755 (executable)
--- a/t/t7406-submodule-update.sh
+++ b/t/t7406-submodule-update.sh
@@ -856,6 +856,22 @@ test_expect_success 'submodule update clone shallow submodule' '
        )
 '
 
+test_expect_success 'submodule update clone shallow submodule outside of depth' '
+       test_when_finished "rm -rf super3" &&
+       git clone cloned super3 &&
+       pwd=$(pwd) &&
+       (
+               cd super3 &&
+               sed -e "s#url = ../#url = file://$pwd/#" <.gitmodules >.gitmodules.tmp &&
+               mv -f .gitmodules.tmp .gitmodules &&
+               test_must_fail git submodule update --init --depth=1 2>actual &&
+               test_i18ngrep "Direct fetching of that commit failed." actual &&
+               git -C ../submodule config uploadpack.allowReachableSHA1InWant true &&
+               git submodule update --init --depth=1 >actual &&
+               test 1 = $(git -C submodule log --oneline | wc -l)
+       )
+'
+
 test_expect_success 'submodule update --recursive drops module name before recursing' '
        (cd super2 &&
         (cd deeper/submodule/subsubmodule &&