[PATCH 1/6] submodule foreach: correct path display in recursive submodules

[Stefan Beller <sbeller@google.com>]

The new test replicates the previous test with the difference of executing
from a sub directory. By executing from a sub directory all we would
expect all displayed paths to be prefixed by '../'.

Prior to this patch the test would report
    Entering 'nested1/nested2/../nested3'
instead of the expected
    Entering '../nested1/nested2/nested3'

because the prefix is put unconditionally in front and after that a
computed display path with is affected by `wt_prefix`. This is wrong as
any relative path computation would need to be at the front. By emptying
the `wt_prefix` in recursive submodules and adding the information of any
relative path into the `prefix` this is fixed.

Signed-off-by: Stefan Beller <sbeller@google.com>
---
 git-submodule.sh             |  3 ++-
 t/t7407-submodule-foreach.sh | 20 ++++++++++++++++++++
 2 files changed, 22 insertions(+), 1 deletion(-)

diff --git a/git-submodule.sh b/git-submodule.sh
index 43c68de..2838069 100755
--- a/git-submodule.sh
+++ b/git-submodule.sh
@@ -417,10 +417,11 @@ cmd_foreach()
 			say "$(eval_gettext "Entering '\$prefix\$displaypath'")"
 			name=$(git submodule--helper name "$sm_path")
 			(
-				prefix="$prefix$sm_path/"
+				prefix="$(relative_path $prefix$sm_path)/"
 				clear_local_git_env
 				cd "$sm_path" &&
 				sm_path=$(relative_path "$sm_path") &&
+				wt_prefix=
 				# we make $path available to scripts ...
 				path=$sm_path &&
 				if test $# -eq 1
diff --git a/t/t7407-submodule-foreach.sh b/t/t7407-submodule-foreach.sh
index 7ca10b8..776b349 100755
--- a/t/t7407-submodule-foreach.sh
+++ b/t/t7407-submodule-foreach.sh
@@ -178,6 +178,26 @@ test_expect_success 'test messages from "foreach --recursive"' '
 '
 
 cat > expect <<EOF
+Entering '../nested1'
+Entering '../nested1/nested2'
+Entering '../nested1/nested2/nested3'
+Entering '../nested1/nested2/nested3/submodule'
+Entering '../sub1'
+Entering '../sub2'
+Entering '../sub3'
+EOF
+
+test_expect_success 'test messages from "foreach --recursive" from subdirectory' '
+	(
+		cd clone2 &&
+		mkdir untracked &&
+		cd untracked &&
+		git submodule foreach --recursive >../../actual
+	) &&
+	test_i18ncmp expect actual
+'
+
+cat > expect <<EOF
 nested1-nested1
 nested2-nested2
 nested3-nested3
-- 
2.8.0.4.g5639dee.dirty