[PATCH 4/5] git-submodule: give submodules proper names

[PATCH 4/5] git-submodule: give submodules proper names

[Lars Hjemli]

This changes the way git-submodule uses .gitmodules: Subsections no longer
specify the submodule path, they now specify the submodule name. The
submodule path is found under the new key "submodule.<name>.path", which is
a required key.

With this change a submodule can be moved between different 'checkout paths'
without upsetting git-submodule.

Signed-off-by: Lars Hjemli <hjemli@gmail.com>
---
  git-submodule.sh           |   45 ++++++++++++++++++++++++++++++-------------
  t/t7400-submodule-basic.sh |   20 +++++++++++++++---
  2 files changed, 47 insertions(+), 18 deletions(-)

diff --git a/git-submodule.sh b/git-submodule.sh
index 6c83c52..89a3885 100755
--- a/git-submodule.sh
+++ b/git-submodule.sh
@@ -25,6 +25,19 @@ say()
  	fi
  }

+#
+# Map submodule path to submodule name
+#
+# $1 = path
+#
+module_name()
+{
+       name=$(GIT_CONFIG=.gitmodules git-config --get-regexp '^submodule\..*\.path$' "$1" |
+       sed -nre 's/^submodule\.(.+)\.path .+$/\1/p')
+       test -z "$name" &&
+       die "No submodule mapping found in .gitmodules for path '$path'"
+       echo "$name"
+}

  #
  # Clone a submodule
@@ -49,7 +62,7 @@ module_clone()
  	die "A file already exist at path '$path'"

  	git-clone -n "$url" "$path" ||
-	die "Clone of submodule '$path' failed"
+	die "Clone of '$url' into submodule path '$path' failed"
  }

  #
@@ -63,17 +76,18 @@ modules_init()
  	while read mode sha1 stage path
  	do
  		# Skip already registered paths
-		url=$(git-config submodule."$path".url)
+		name=$(module_name "$path") || exit
+		url=$(git-config submodule."$name".url)
  		test -z "$url" || continue

-		url=$(GIT_CONFIG=.gitmodules git-config submodule."$path".url)
+		url=$(GIT_CONFIG=.gitmodules git-config submodule."$name".url)
  		test -z "$url" &&
-		die "No url found for submodule '$path' in .gitmodules"
+		die "No url found for submodule path '$path' in .gitmodules"

-		git-config submodule."$path".url "$url" ||
-		die "Failed to register url for submodule '$path'"
+		git-config submodule."$name".url "$url" ||
+		die "Failed to register url for submodule path '$path'"

-		say "Submodule '$path' registered with url '$url'"
+		say "Submodule '$name' ($url) registered for path '$path'"
  	done
  }

@@ -87,13 +101,14 @@ modules_update()
  	git ls-files --stage -- "$@" | grep -e '^160000 ' |
  	while read mode sha1 stage path
  	do
-		url=$(git-config submodule."$path".url)
+		name=$(module_name "$path") || exit
+		url=$(git-config submodule."$name".url)
  		if test -z "$url"
  		then
  			# Only mention uninitialized submodules when its
  			# path have been specified
  			test "$#" != "0" &&
-			say "Submodule '$path' not initialized"
+			say "Submodule path '$path' not initialized"
  			continue
  		fi

@@ -104,22 +119,22 @@ modules_update()
  		else
  			subsha1=$(unset GIT_DIR && cd "$path" &&
  				git-rev-parse --verify HEAD) ||
-			die "Unable to find current revision of submodule '$path'"
+			die "Unable to find current revision in submodule path '$path'"
  		fi

  		if test "$subsha1" != "$sha1"
  		then
  			(unset GIT_DIR && cd "$path" && git-fetch &&
  				git-checkout -q "$sha1") ||
-			die "Unable to checkout '$sha1' in submodule '$path'"
+			die "Unable to checkout '$sha1' in submodule path '$path'"

-			say "Submodule '$path': checked out '$sha1'"
+			say "Submodule path '$path': checked out '$sha1'"
  		fi
  	done
  }

  #
-# List all registered submodules, prefixed with:
+# List all submodules, prefixed with:
  #  - submodule not initialized
  #  + different revision checked out
  #
@@ -133,7 +148,9 @@ modules_list()
  	git ls-files --stage -- "$@" | grep -e '^160000 ' |
  	while read mode sha1 stage path
  	do
-		if ! test -d "$path"/.git
+		name=$(module_name "$path") || exit
+		url=$(git-config submodule."$name".url)
+		if test -z "url" || ! test -d "$path"/.git
  		then
  			say "-$sha1 $path"
  			continue;
diff --git a/t/t7400-submodule-basic.sh b/t/t7400-submodule-basic.sh
index 9f2d4f9..7a9b505 100755
--- a/t/t7400-submodule-basic.sh
+++ b/t/t7400-submodule-basic.sh
@@ -18,7 +18,7 @@ subcommands of git-submodule.
  #  -add directory lib to 'superproject', this creates a DIRLINK entry
  #  -add a couple of regular files to enable testing of submodule filtering
  #  -mv lib subrepo
-#  -add an entry to .gitmodules for path 'lib'
+#  -add an entry to .gitmodules for submodule 'example'
  #
  test_expect_success 'Prepare submodule testing' '
  	mkdir lib &&
@@ -40,7 +40,19 @@ test_expect_success 'Prepare submodule testing' '
  	git-add a lib z &&
  	git-commit -m "super commit 1" &&
  	mv lib .subrepo &&
-	GIT_CONFIG=.gitmodules git-config submodule.lib.url git://example.com/lib.git
+	GIT_CONFIG=.gitmodules git-config submodule.example.url git://example.com/lib.git
+'
+
+test_expect_success 'status should fail for unmapped paths' '
+	if git-submodule status
+	then
+		echo "[OOPS] submodule status succeeded"
+		false
+	elif ! GIT_CONFIG=.gitmodules git-config submodule.example.path lib
+	then
+		echo "[OOPS] git-config failed to update .gitmodules"
+		false
+	fi
  '

  test_expect_success 'status should only print one line' '
@@ -54,12 +66,12 @@ test_expect_success 'status should initially be "missing"' '

  test_expect_success 'init should register submodule url in .git/config' '
  	git-submodule init &&
-	url=$(git-config submodule.lib.url) &&
+	url=$(git-config submodule.example.url) &&
  	if test "$url" != "git://example.com/lib.git"
  	then
  		echo "[OOPS] init succeeded but submodule url is wrong"
  		false
-	elif ! git-config submodule.lib.url ./.subrepo
+	elif ! git-config submodule.example.url ./.subrepo
  	then
  		echo "[OOPS] init succeeded but update of url failed"
  		false
-- 
1.5.2.1.914.gbd3a7

[PATCH 0/5] misc. submodule related changes

[Lars Hjemli]

Here is a reworked patch-series for git-submodule, trying to cater for
the issues with the previous series.

Shortlog:
 [1/5] t7400: barf if git-submodule removes or replaces a file
 [2/5] git-submodule: remember to checkout after clone
 [3/5] Rename sections from "module" to "submodule" in .gitmodules
 [4/5] git-submodule: give submodules proper names
 [5/5] Add gitmodules(5)

Diffstat:
Documentation/Makefile       |    2 +-
Documentation/gitmodules.txt |   63 ++++++++++++++++++++++++++++++++++++++++++
git-submodule.sh             |   52 +++++++++++++++++++++++-----------
t/t7400-submodule-basic.sh   |   22 +++++++++++---
4 files changed, 116 insertions(+), 23 deletions(-)

[PATCH 1/5] t7400: barf if git-submodule removes or replaces a file

[Lars Hjemli]

The test for an unmolested file wouldn't fail properly if the file had been
removed or replaced by something other than a regular file. This fixes it.

Signed-off-by: Lars Hjemli <hjemli@gmail.com>
---
 t/t7400-submodule-basic.sh |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/t/t7400-submodule-basic.sh b/t/t7400-submodule-basic.sh
index 3940433..74fafce 100755
--- a/t/t7400-submodule-basic.sh
+++ b/t/t7400-submodule-basic.sh
@@ -72,7 +72,7 @@ test_expect_success 'update should fail when path is used by a file' '
 	then
 		echo "[OOPS] update should have failed"
 		false
-	elif test -f lib && test "$(cat lib)" != "hello"
+	elif test "$(cat lib)" != "hello"
 	then
 		echo "[OOPS] update failed but lib file was molested"
 		false
-- 
1.5.2.1.914.gbd3a7

[PATCH 2/5] git-submodule: remember to checkout after clone

[Lars Hjemli]

After the initial clone of a submodule, no files would be checked out in
the submodule directory if the submodule HEAD was equal to the SHA-1
specified in the index of the containing repository. This fixes the problem
by simply ignoring submodule HEAD for a fresh clone.

Signed-off-by: Lars Hjemli <hjemli@gmail.com>
---
 git-submodule.sh |    9 +++++----
 1 files changed, 5 insertions(+), 4 deletions(-)

diff --git a/git-submodule.sh b/git-submodule.sh
index 8bdd99a..4a6d64d 100755
--- a/git-submodule.sh
+++ b/git-submodule.sh
@@ -100,12 +100,13 @@ modules_update()
 		if ! test -d "$path"/.git
 		then
 			module_clone "$path" "$url" || exit
+			subsha1=
+		else
+			subsha1=$(unset GIT_DIR && cd "$path" &&
+				git-rev-parse --verify HEAD) ||
+			die "Unable to find current revision of submodule '$path'"
 		fi
 
-		subsha1=$(unset GIT_DIR && cd "$path" &&
-			git-rev-parse --verify HEAD) ||
-		die "Unable to find current revision of submodule '$path'"
-
 		if test "$subsha1" != "$sha1"
 		then
 			(unset GIT_DIR && cd "$path" && git-fetch &&
-- 
1.5.2.1.914.gbd3a7

[PATCH 3/5] Rename sections from "module" to "submodule" in .gitmodules

[Lars Hjemli]

On 6/10/07, Junio C Hamano <gitster@pobox.com> wrote:
> "Lars Hjemli" <hjemli@gmail.com> writes:
>
> > Hmm, maybe I should just rename [module] to [submodule] right now? It
> > would be better forward compatible with the proposed extension, it
> > would 'harmonize' the section names used in .gitmodules and
> > .git/config, and it would offer a clean break from what's currently
> > supported in 'master'.
>
> Yes, the difference between '[submodule]' vs '[module]' in
> .git/config and .gitmodules confused me while looking at your
> latest patch series.  I am in favor of unifying them.  We would
> not be breaking any released version if we harmonize them now.

Here it is.

Signed-off-by: Lars Hjemli <hjemli@gmail.com>
---
 git-submodule.sh           |    2 +-
 t/t7400-submodule-basic.sh |    2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/git-submodule.sh b/git-submodule.sh
index 4a6d64d..6c83c52 100755
--- a/git-submodule.sh
+++ b/git-submodule.sh
@@ -66,7 +66,7 @@ modules_init()
 		url=$(git-config submodule."$path".url)
 		test -z "$url" || continue
 
-		url=$(GIT_CONFIG=.gitmodules git-config module."$path".url)
+		url=$(GIT_CONFIG=.gitmodules git-config submodule."$path".url)
 		test -z "$url" &&
 		die "No url found for submodule '$path' in .gitmodules"
 
diff --git a/t/t7400-submodule-basic.sh b/t/t7400-submodule-basic.sh
index 74fafce..9f2d4f9 100755
--- a/t/t7400-submodule-basic.sh
+++ b/t/t7400-submodule-basic.sh
@@ -40,7 +40,7 @@ test_expect_success 'Prepare submodule testing' '
 	git-add a lib z &&
 	git-commit -m "super commit 1" &&
 	mv lib .subrepo &&
-	GIT_CONFIG=.gitmodules git-config module.lib.url git://example.com/lib.git
+	GIT_CONFIG=.gitmodules git-config submodule.lib.url git://example.com/lib.git
 '
 
 test_expect_success 'status should only print one line' '
-- 
1.5.2.1.914.gbd3a7

[PATCH 4/5] git-submodule: give submodules proper names

[Lars Hjemli]

This changes the way git-submodule uses .gitmodules: Subsections no longer
specify the submodule path, they now specify the submodule name. The
submodule path is found under the new key "submodule.<name>.path", which is
a required key.

With this change a submodule can be moved between different 'checkout paths'
without upsetting git-submodule.

Signed-off-by: Lars Hjemli <hjemli@gmail.com>
---
 git-submodule.sh           |   45 ++++++++++++++++++++++++++++++-------------
 t/t7400-submodule-basic.sh |   20 +++++++++++++++---
 2 files changed, 47 insertions(+), 18 deletions(-)

diff --git a/git-submodule.sh b/git-submodule.sh
index 6c83c52..89a3885 100755
--- a/git-submodule.sh
+++ b/git-submodule.sh
@@ -25,6 +25,19 @@ say()
 	fi
 }
 
+#
+# Map submodule path to submodule name
+#
+# $1 = path
+#
+module_name()
+{
+       name=$(GIT_CONFIG=.gitmodules git-config --get-regexp '^submodule\..*\.path$' "$1" |
+       sed -nre 's/^submodule\.(.+)\.path .+$/\1/p')
+       test -z "$name" &&
+       die "No submodule mapping found in .gitmodules for path '$path'"
+       echo "$name"
+}
 
 #
 # Clone a submodule
@@ -49,7 +62,7 @@ module_clone()
 	die "A file already exist at path '$path'"
 
 	git-clone -n "$url" "$path" ||
-	die "Clone of submodule '$path' failed"
+	die "Clone of '$url' into submodule path '$path' failed"
 }
 
 #
@@ -63,17 +76,18 @@ modules_init()
 	while read mode sha1 stage path
 	do
 		# Skip already registered paths
-		url=$(git-config submodule."$path".url)
+		name=$(module_name "$path") || exit
+		url=$(git-config submodule."$name".url)
 		test -z "$url" || continue
 
-		url=$(GIT_CONFIG=.gitmodules git-config submodule."$path".url)
+		url=$(GIT_CONFIG=.gitmodules git-config submodule."$name".url)
 		test -z "$url" &&
-		die "No url found for submodule '$path' in .gitmodules"
+		die "No url found for submodule path '$path' in .gitmodules"
 
-		git-config submodule."$path".url "$url" ||
-		die "Failed to register url for submodule '$path'"
+		git-config submodule."$name".url "$url" ||
+		die "Failed to register url for submodule path '$path'"
 
-		say "Submodule '$path' registered with url '$url'"
+		say "Submodule '$name' ($url) registered for path '$path'"
 	done
 }
 
@@ -87,13 +101,14 @@ modules_update()
 	git ls-files --stage -- "$@" | grep -e '^160000 ' |
 	while read mode sha1 stage path
 	do
-		url=$(git-config submodule."$path".url)
+		name=$(module_name "$path") || exit
+		url=$(git-config submodule."$name".url)
 		if test -z "$url"
 		then
 			# Only mention uninitialized submodules when its
 			# path have been specified
 			test "$#" != "0" &&
-			say "Submodule '$path' not initialized"
+			say "Submodule path '$path' not initialized"
 			continue
 		fi
 
@@ -104,22 +119,22 @@ modules_update()
 		else
 			subsha1=$(unset GIT_DIR && cd "$path" &&
 				git-rev-parse --verify HEAD) ||
-			die "Unable to find current revision of submodule '$path'"
+			die "Unable to find current revision in submodule path '$path'"
 		fi
 
 		if test "$subsha1" != "$sha1"
 		then
 			(unset GIT_DIR && cd "$path" && git-fetch &&
 				git-checkout -q "$sha1") ||
-			die "Unable to checkout '$sha1' in submodule '$path'"
+			die "Unable to checkout '$sha1' in submodule path '$path'"
 
-			say "Submodule '$path': checked out '$sha1'"
+			say "Submodule path '$path': checked out '$sha1'"
 		fi
 	done
 }
 
 #
-# List all registered submodules, prefixed with:
+# List all submodules, prefixed with:
 #  - submodule not initialized
 #  + different revision checked out
 #
@@ -133,7 +148,9 @@ modules_list()
 	git ls-files --stage -- "$@" | grep -e '^160000 ' |
 	while read mode sha1 stage path
 	do
-		if ! test -d "$path"/.git
+		name=$(module_name "$path") || exit
+		url=$(git-config submodule."$name".url)
+		if test -z "url" || ! test -d "$path"/.git
 		then
 			say "-$sha1 $path"
 			continue;
diff --git a/t/t7400-submodule-basic.sh b/t/t7400-submodule-basic.sh
index 9f2d4f9..7a9b505 100755
--- a/t/t7400-submodule-basic.sh
+++ b/t/t7400-submodule-basic.sh
@@ -18,7 +18,7 @@ subcommands of git-submodule.
 #  -add directory lib to 'superproject', this creates a DIRLINK entry
 #  -add a couple of regular files to enable testing of submodule filtering
 #  -mv lib subrepo
-#  -add an entry to .gitmodules for path 'lib'
+#  -add an entry to .gitmodules for submodule 'example'
 #
 test_expect_success 'Prepare submodule testing' '
 	mkdir lib &&
@@ -40,7 +40,19 @@ test_expect_success 'Prepare submodule testing' '
 	git-add a lib z &&
 	git-commit -m "super commit 1" &&
 	mv lib .subrepo &&
-	GIT_CONFIG=.gitmodules git-config submodule.lib.url git://example.com/lib.git
+	GIT_CONFIG=.gitmodules git-config submodule.example.url git://example.com/lib.git
+'
+
+test_expect_success 'status should fail for unmapped paths' '
+	if git-submodule status
+	then
+		echo "[OOPS] submodule status succeeded"
+		false
+	elif ! GIT_CONFIG=.gitmodules git-config submodule.example.path lib
+	then
+		echo "[OOPS] git-config failed to update .gitmodules"
+		false
+	fi
 '
 
 test_expect_success 'status should only print one line' '
@@ -54,12 +66,12 @@ test_expect_success 'status should initially be "missing"' '
 
 test_expect_success 'init should register submodule url in .git/config' '
 	git-submodule init &&
-	url=$(git-config submodule.lib.url) &&
+	url=$(git-config submodule.example.url) &&
 	if test "$url" != "git://example.com/lib.git"
 	then
 		echo "[OOPS] init succeeded but submodule url is wrong"
 		false
-	elif ! git-config submodule.lib.url ./.subrepo
+	elif ! git-config submodule.example.url ./.subrepo
 	then
 		echo "[OOPS] init succeeded but update of url failed"
 		false
-- 
1.5.2.1.914.gbd3a7