Build system: generate metadata.json

Instead of hardcoding metadata.json, generate it from .in files,
adding installation prefixes, current target version and configured
uuid.

extension.mk

@@ -1,10 +1,19 @@
 # Change these to modify how installation is performed
-# If you modify extensionbase, you also need to modify
-# metadata.json of each extension
 topextensiondir = $(datadir)/gnome-shell/extensions
 extensionbase = @gnome-shell-extensions.gnome.org
 
-extensiondir = $(topextensiondir)/$(EXTENSION_ID)$(extensionbase)
+uuid = $(EXTENSION_ID)$(extensionbase)
 
-dist_extension_DATA = metadata.json extension.js stylesheet.css
-nodist_extension_DATA = $(EXTRA_EXTENSION)
+extensiondir = $(topextensiondir)/$(uuid)
+
+dist_extension_DATA = extension.js stylesheet.css
+nodist_extension_DATA = metadata.json $(EXTRA_EXTENSION)
+
+EXTRA_DIST = metadata.json.in
+
+metadata.json: metadata.json.in
+	sed -e "s|[@]LOCALEDIR@|$(datadir)/locale|" \
+	    -e "s|[@]uuid@|$(uuid)|" \
+            -e "s|[@]shell_current@|$(PACKAGE_VERSION)|" $< > $@
+
+CLEANFILES = metadata.json

extensions/alternate-tab/metadata.json.in

@@ -1,7 +1,8 @@
 {
-"uuid": "alternate-tab@gnome-shell-extensions.gnome.org",
+"uuid": "@uuid@",
 "name": "AlternateTab",
 "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", "2.91.6" ]
+"shell-version": [ "2.91.5", "@shell_current@" ],
+"localedir": "@LOCALEDIR@"
 }

extensions/example/metadata.json.in

@@ -1,6 +1,7 @@
 {
- "uuid": "example@gnome-shell-extensions.gnome.org",
+ "uuid": "@uuid@",
  "name": "Hello, World!",
  "description": "An example extension to show how it works. Shows Hello, world when clicking on the top panel.",
- "shell-version": [ "2.91.6" ]
+ "shell-version": [ "@shell_current@" ],
+ "localedir": "@LOCALEDIR@"
 }

extensions/windowsNavigator/metadata.json.in

@@ -1,6 +1,7 @@
 {
-    "shell-version": ["2.91.5", "2.91.6"],
-    "uuid": "windowsNavigator@gnome-shell-extensions.gnome.org",
+    "shell-version": ["2.91.5", "@shell_current@"],
+    "uuid": "@uuid@",
+    "localedir": "@LOCALEDIR@",
     "original-author": "zaspire@rambler.ru",
     "name": "windowNavigator",
     "description": "Allow keyboard selection of windows and workspaces in overlay mode"

extensions/xrandr-indicator/metadata.json.in

@@ -1,6 +1,7 @@
 {
-"uuid": "xrandr-indicator@gnome-shell-extensions.gnome.org",
+"uuid": "@uuid@",
 "name": "Monitor Status Indicator",
 "description": "Add a systems status menu for rotating monitors (overrides what is currently provided by gnome-settings-daemon)",
-"shell-version": [ "2.91.5", "2.91.6" ]
+"shell-version": [ "2.91.5", "@shell_current@" ],
+"localedir": "@LOCALEDIR@"
 }