Add url property in the metadata

GNOME Shell emits a warning when "url" is absent in metadata.json,
adding it costs nothing. Links to the GIT repository because I
found no better page to reference.

extension.mk

@@ -1,3 +1,5 @@
+extensionurl = http://git.gnome.org/gnome-shell-extensions
+
 # Change these to modify how installation is performed
 topextensiondir = $(datadir)/gnome-shell/extensions
 extensionbase = @gnome-shell-extensions.gnome.org
@@ -14,6 +16,7 @@ EXTRA_DIST = metadata.json.in
 metadata.json: metadata.json.in $(top_builddir)/config.status
 	$(AM_V_GEN) sed -e "s|[@]LOCALEDIR@|$(datadir)/locale|" \
 	    -e "s|[@]uuid@|$(uuid)|" \
-            -e "s|[@]shell_current@|$(PACKAGE_VERSION)|" $< > $@
+	    -e "s|[@]shell_current@|$(PACKAGE_VERSION)|" \
+	    -e "s|[@]url@|$(extensionurl)|" $< > $@
 
 CLEANFILES = metadata.json

extensions/alternate-tab/metadata.json.in

@@ -4,5 +4,6 @@
 "description": "A replacement for Alt-Tab, allows to cycle between windows and does not group by application",
 "original-author": "thomas.bouffon@gmail.com",
 "shell-version": [ "2.91.5", "@shell_current@" ],
-"localedir": "@LOCALEDIR@"
+"localedir": "@LOCALEDIR@",
+"url": "@url@"
 }

extensions/auto-move-windows/metadata.json.in

@@ -4,5 +4,6 @@
  "description": "Move applications to specific workspaces when they create windows",
  "shell-version": [ "@shell_current@" ],
  "localedir": "@LOCALEDIR@",
- "original-authors": [ "alessandro.crismani@gmail.com", "thomas.bouffon@gmail.com" ]
+ "original-authors": [ "alessandro.crismani@gmail.com", "thomas.bouffon@gmail.com" ],
+ "url": "@url@"
 }

extensions/dock/metadata.json.in

@@ -5,4 +5,5 @@
 "original-author": "tclaesson@gmail.com",
 "shell-version": [ "@shell_current@" ],
 "localedir": "@LOCALEDIR@",
+"url": "@url@"
 }

extensions/example/metadata.json.in

@@ -3,5 +3,6 @@
  "name": "Hello, World!",
  "description": "An example extension to show how it works. Shows Hello, world when clicking on the top panel.",
  "shell-version": [ "@shell_current@" ],
- "localedir": "@LOCALEDIR@"
+ "localedir": "@LOCALEDIR@",
+ "url": "@url@"
 }

extensions/windowsNavigator/metadata.json.in

@@ -4,5 +4,6 @@
     "localedir": "@LOCALEDIR@",
     "original-author": "zaspire@rambler.ru",
     "name": "windowNavigator",
-    "description": "Allow keyboard selection of windows and workspaces in overlay mode"
+    "description": "Allow keyboard selection of windows and workspaces in overlay mode",
+    "url": "@url@"
 }

extensions/xrandr-indicator/metadata.json.in

@@ -3,5 +3,6 @@
 "name": "Monitor Status Indicator",
 "description": "Add a systems status menu for rotating monitors (overrides what is currently provided by gnome-settings-daemon)",
 "shell-version": [ "@shell_current@" ],
-"localedir": "@LOCALEDIR@"
+"localedir": "@LOCALEDIR@",
+"url": "@url@"
 }