CMake with a PPA plugin

snap/plugins/cmake_with_ppa.py

@@ -0,0 +1,16 @@
+from snapcraft.plugins import cmake
+import subprocess
+
+class CMakeWithPpa(cmake.CMakePlugin):
+
+    @classmethod
+    def schema(cls):
+        schema = super().schema()
+        schema['properties']['ppa'] = { 'type': 'string', 'default': 'mir-team/release' }
+        return schema
+
+
+    def __init__(self, name, options, project):
+        super().__init__(name, options, project)
+        subprocess.run(["sudo", "apt", "--assume-yes", "install", "software-properties-common"])
+        subprocess.run(["sudo", "add-apt-repository", "-yu", "ppa:"+self.options.ppa])

snap/snapcraft.yaml

@@ -17,13 +17,6 @@ apps:
     command: bin/egmde.launcher
 
 parts:
-  ppa-mir:
-    plugin: nil
-    override-pull: |
-      sudo apt --assume-yes install software-properties-common
-      sudo add-apt-repository -yu ppa:mir-team/release
-      snapcraftctl pull
-
   recipe-version:
     plugin: nil
     source: .
@@ -34,15 +27,15 @@ parts:
       - -recipe-version
 
   egmde:
-    after: [ppa-mir, recipe-version]
+    after: [recipe-version]
     override-pull: |
       snapcraftctl pull
       server_version=`git rev-list --count HEAD`
       mir_version=`LANG=C apt-cache policy mir-graphics-drivers-desktop | sed -rne 's/^\s+Candidate:\s+([^-]*)-.+$/\1/p'`
       recipe_version=`cat $SNAPCRAFT_STAGE/recipe-version`
       snapcraftctl set-version $server_version-mir$mir_version-snap$recipe_version
       if echo $mir_version | grep dev; then snapcraftctl set-grade devel; else snapcraftctl set-grade stable; fi
-    plugin: cmake
+    plugin: cmake-with-ppa
     source: https://github.com/AlanGriffiths/egmde.git
     build-packages:
       - pkg-config