submodule foreach: document variable '$displaypath'

It was observed that the variable '$displaypath' was accessible but
undocumented. Hence, document it.

Discussed-with: Ramsay Jones <[email protected]>
Signed-off-by: Stefan Beller <[email protected]>
Signed-off-by: Prathamesh Chavan <[email protected]>
Signed-off-by: Junio C Hamano <[email protected]>

Author: pratham-pc

Documentation/git-submodule.txt

@@ -183,11 +183,13 @@ information too.
 
 foreach [--recursive] <command>::
 	Evaluates an arbitrary shell command in each checked out submodule.
-	The command has access to the variables $name, $sm_path, $sha1 and
-	$toplevel:
+	The command has access to the variables $name, $sm_path, $displaypath,
+	$sha1 and $toplevel:
 	$name is the name of the relevant submodule section in `.gitmodules`,
 	$sm_path is the path of the submodule as recorded in the immediate
-	superproject, $sha1 is the commit as recorded in the immediate
+	superproject, $displaypath contains the relative path from the
+	current working directory to the submodules root directory,
+	$sha1 is the commit as recorded in the immediate
 	superproject, and $toplevel is the absolute path to the top-level
 	of the immediate superproject.
 	Note that to avoid conflicts with '$PATH' on Windows, the '$path'

t/t7407-submodule-foreach.sh

@@ -82,16 +82,16 @@ test_expect_success 'test basic "submodule foreach" usage' '
 
 cat >expect <<EOF
 Entering '../sub1'
-$pwd/clone-foo1-sub1-$sub1sha1
+$pwd/clone-foo1-sub1-../sub1-$sub1sha1
 Entering '../sub3'
-$pwd/clone-foo3-sub3-$sub3sha1
+$pwd/clone-foo3-sub3-../sub3-$sub3sha1
 EOF
 
 test_expect_success 'test "submodule foreach" from subdirectory' '
 	mkdir clone/sub &&
 	(
 		cd clone/sub &&
-		git submodule foreach "echo \$toplevel-\$name-\$sm_path-\$sha1" >../../actual
+		git submodule foreach "echo \$toplevel-\$name-\$sm_path-\$displaypath-\$sha1" >../../actual
 	) &&
 	test_i18ncmp expect actual
 '
@@ -206,25 +206,25 @@ submodulesha1=$(cd clone2/nested1/nested2/nested3/submodule && git rev-parse HEA
 
 cat >expect <<EOF
 Entering '../nested1'
-toplevel: $pwd/clone2 name: nested1 path: nested1 hash: $nested1sha1
+toplevel: $pwd/clone2 name: nested1 path: nested1 displaypath: ../nested1 hash: $nested1sha1
 Entering '../nested1/nested2'
-toplevel: $pwd/clone2/nested1 name: nested2 path: nested2 hash: $nested2sha1
+toplevel: $pwd/clone2/nested1 name: nested2 path: nested2 displaypath: ../nested1/nested2 hash: $nested2sha1
 Entering '../nested1/nested2/nested3'
-toplevel: $pwd/clone2/nested1/nested2 name: nested3 path: nested3 hash: $nested3sha1
+toplevel: $pwd/clone2/nested1/nested2 name: nested3 path: nested3 displaypath: ../nested1/nested2/nested3 hash: $nested3sha1
 Entering '../nested1/nested2/nested3/submodule'
-toplevel: $pwd/clone2/nested1/nested2/nested3 name: submodule path: submodule hash: $submodulesha1
+toplevel: $pwd/clone2/nested1/nested2/nested3 name: submodule path: submodule displaypath: ../nested1/nested2/nested3/submodule hash: $submodulesha1
 Entering '../sub1'
-toplevel: $pwd/clone2 name: foo1 path: sub1 hash: $sub1sha1
+toplevel: $pwd/clone2 name: foo1 path: sub1 displaypath: ../sub1 hash: $sub1sha1
 Entering '../sub2'
-toplevel: $pwd/clone2 name: foo2 path: sub2 hash: $sub2sha1
+toplevel: $pwd/clone2 name: foo2 path: sub2 displaypath: ../sub2 hash: $sub2sha1
 Entering '../sub3'
-toplevel: $pwd/clone2 name: foo3 path: sub3 hash: $sub3sha1
+toplevel: $pwd/clone2 name: foo3 path: sub3 displaypath: ../sub3 hash: $sub3sha1
 EOF
 
 test_expect_success 'test "submodule foreach --recursive" from subdirectory' '
 	(
 		cd clone2/untracked &&
-		git submodule foreach --recursive "echo toplevel: \$toplevel name: \$name path: \$sm_path hash: \$sha1" >../../actual
+		git submodule foreach --recursive "echo toplevel: \$toplevel name: \$name path: \$sm_path displaypath: \$displaypath hash: \$sha1" >../../actual
 	) &&
 	test_i18ncmp expect actual
 '