Feature/switch to nix for bundletool

.drone.yml

@@ -36,19 +36,19 @@ steps:
     when:
       event: tag
   - name: Accrescent APKs
-    image: nixos/nix
+    image: gonzague/bundletool
     environment:
       ANDROID_KEY_FILE: /tmp/key.properties
       SERVER_URL:
         from_secret: server_url
     commands:
-      - nix-env -iA nixpkgs.wget nixpkgs.bundletool
+      - mkdir /tmp
       - wget http://$SERVER_URL/service-account.json -O /tmp/service-account.json
       - wget http://$SERVER_URL/key.properties -O /tmp/key.properties
       - wget http://$SERVER_URL/keystore.jks -O /tmp/keystore.jks
       - . /tmp/key.properties
       - cd build/app/outputs/bundle/release/
-      - bundletool build-apks --bundle=app-release.aab --output=app-release.apks --ks-pass=pass:$${storePassword} --ks=/tmp/keystore.jks --ks-key-alias=upload --key-pass=pass:$${keyPassword}
+      - bundletool build-apks --bundle=app-release.aab --output=app-release.apks --ks-pass=pass:$${storePassword} --ks=/tmp/keystore.jks --ks-key-alias=upload --key-pass=pass:$${keyPassword} --aapt2=/bin/aapt2
     when:
       event: tag
   - name: Publish

.gitignore

@@ -42,3 +42,4 @@ app.*.map.json
 /android/app/debug
 /android/app/profile
 /android/app/release
+/docker/result

docker/bundletool.nix

@@ -0,0 +1,13 @@
+# usage:
+# build the image
+# nix-build -o result bundletool.nix
+# docker load -i result
+# use the image as usual with name gonzague/bundletool
+{
+  pkgs ? import <nixpkgs> {system = "x86_64-linux";}
+}:
+pkgs.dockerTools.buildLayeredImage {
+  name = "gonzague/bundletool";
+  tag = "latest";
+  contents = with pkgs; [ toybox wget bundletool aapt bash android-tools ];
+}