linux: Add Snap support for Linux.

This adds a new build configs in package.json for electron-builder
to be able to generate a snap package for zulip. 

Fixes #443.

.gitignore

@@ -7,6 +7,13 @@ node_modules/
 # Compiled binary build directory
 dist/
 
+#snap generated files
+snap/parts
+snap/prime
+snap/snap
+snap/stage
+snap/*.snap
+
 # Logs
 logs
 *.log

development.md

@@ -15,6 +15,7 @@ To build and run the app from source, you'll need the following:
 * [Python](https://www.python.org/downloads/release/python-2713/)
   (v2.7.x recommended)
 * A C++ compiler compatible with C++11
+* Linux users also need [Snapcraft](https://snapcraft.io/)
 * Development headers for the libXext, libXtst, and libxkbfile libraries
 
 ### Debian/Ubuntu and friends
@@ -25,7 +26,7 @@ manager (see [here][nodesource-install] for more on the first command):
 
 ```sh
 $ curl -sL https://deb.nodesource.com/setup_6.x | sudo -E bash -
-$ sudo apt install git nodejs python build-essential libxext-dev libxtst-dev libxkbfile-dev libgconf-2-4
+$ sudo apt install git nodejs python build-essential snapcraft libxext-dev libxtst-dev libxkbfile-dev libgconf-2-4
 ```
 
 [nodesource-install]: https://nodejs.org/en/download/package-manager/#debian-and-ubuntu-based-linux-distributions
@@ -76,7 +77,7 @@ This command will produce distributable packages or installers for the
 operating system you're running on:
 * on Windows, a Windows installer file
 * on macOS, a `.dmg` file
-* on Linux, a plain `.zip` file as well as a `.deb` file and an
+* on Linux, a plain `.zip` file as well as a `.deb` file, `.snap` file and an
   `AppImage` file.
 To generate all three types, you will need all three operating
 systems.

package.json

@@ -55,7 +55,8 @@
       "target": [
         "deb",
         "zip",
-        "AppImage"
+        "AppImage",
+        "snap"
       ],
       "maintainer": "Akash Nimare <[email protected]>"
     },
@@ -64,6 +65,9 @@
       "afterInstall": "./scripts/debian-add-repo.sh",
       "afterRemove": "./scripts/debian-uninstaller.sh"
     },
+    "snap": {
+      "synopsis": "Zulip Desktop App"
+    },
     "dmg": {
       "background": "build/appdmg.png",
       "icon": "build/icon.icns",

snap/snapcraft.yaml

@@ -0,0 +1,37 @@
+name: zulip
+version: 1.8.2
+summary: Zulip
+description: Zulip Desktop Client for Linux
+confinement: strict
+grade: stable
+icon: ../build/icon.png
+apps:
+  zulip:
+    command: env TMPDIR=$XDG_RUNTIME_DIR desktop-launch $SNAP/zulip
+    plugs:
+      - desktop
+      - desktop-legacy
+      - home
+      - x11
+      - unity7
+      - browser-support
+      - network
+      - gsettings
+      - pulseaudio
+      - opengl
+parts:
+  app:
+    plugin: dump
+    stage-packages:
+      - libasound2
+      - libgconf2-4
+      - libnotify4
+      - libnspr4
+      - libnss3
+      - libpcre3
+      - libpulse0
+      - libxss1
+      - libxtst6
+    source: ../dist/linux-unpacked
+    after:
+      - desktop-gtk2