[lightsoff] Add snap packaging

[Ken VanDine <kvandine src gnome org>]

commit 8dd83245644dedef2c071c0e86aa15a2138c384e
Author: Ken VanDine <kvandine gnome org>
Date:   Wed Nov 15 14:58:02 2017 -0500

    Add snap packaging
    
    https://bugzilla.gnome.org/show_bug.cgi?id=790408

 snap/snapcraft.yaml |   69 +++++++++++++++++++++++++++++++++++++++++++++++++++
 1 files changed, 69 insertions(+), 0 deletions(-)
---
diff --git a/snap/snapcraft.yaml b/snap/snapcraft.yaml
new file mode 100644
index 0000000..08d4034
--- /dev/null
+++ b/snap/snapcraft.yaml
@@ -0,0 +1,69 @@
+name: lightsoff
+version: git
+summary: Turn off all the lights
+description: |
+  Lights Off is a collection of light switch puzzles. Clicking on a light
+  toggles it either on or off, but also toggles all the surrounding lights,
+  too. Your objective is simple: turn off all the lights!
+
+  Players who delight in turning off lights will enjoy the huge number of
+  levels.    
+
+grade: devel # must be 'stable' to release into candidate/stable channels
+confinement: strict
+
+plugs:
+    gnome-3-26-1604:
+      interface: content
+      target: $SNAP/gnome-platform
+      default-provider: gnome-3-26-1604:gnome-3-26-1604
+
+slots:
+  # for GtkApplication registration
+  lightsoff:
+    interface: dbus
+    bus: session
+    name: org.gnome.lightsoff
+
+apps:
+  lightsoff:
+    command: desktop-launch lightsoff
+    plugs:
+      - desktop
+      - desktop-legacy
+      - gsettings
+      - pulseaudio
+      - opengl
+      - unity7
+      - wayland
+    desktop: usr/share/applications/lightsoff.desktop
+    environment:
+      PATH: $SNAP/usr/games:$PATH
+
+parts:
+  lightsoff:
+    build-attributes: [no-system-libraries]
+    after: [desktop-gnome-platform]
+    source: .
+    source-type: git
+    prepare:
+      sed -i.bak -e 's|Icon=lightsoff$|Icon=${SNAP}/meta/gui/lightsoff.svg|g' data/lightsoff.desktop.in
+    install: |
+      mkdir -p $SNAPCRAFT_PART_INSTALL/meta/gui/
+      cp ../src/data/icons/hicolor/scalable/lightsoff.svg $SNAPCRAFT_PART_INSTALL/meta/gui/
+      cp data/lightsoff.desktop $SNAPCRAFT_PART_INSTALL/meta/gui/
+    plugin: autotools
+    configflags: [--prefix=/snap/lightsoff/current/usr, --bindir=/snap/lightsoff/current/usr/games]
+    organize:
+      snap/lightsoff/current/usr: usr
+    build-packages:
+      - appstream-util
+      - gnome-pkg-tools
+      - intltool
+      - libclutter-1.0-dev
+      - libclutter-gtk-1.0-dev
+      - libglib2.0-dev
+      - libgtk-3-dev
+      - librsvg2-dev
+      - valac
+      - yelp-tools