boring build system stuff

.travis.yml

@@ -2,15 +2,44 @@
 language: android
 jdk: oraclejdk7
 
+env:
+  global:
+    # switch glibc to a memory conserving mode
+    - MALLOC_ARENA_MAX=2
+    # wait 5 minutes for adb to connect to emulator. Travis-ci cancels a
+    # stalled build after 10 minutes, so this should be shorter than that so
+    # there is time for the build to report the error.
+    - ADB_INSTALL_TIMEOUT=5
+
 android:
   components:
-     - android-22
-     - build-tools-22.0.1
-     - extra-android-m2repository
+    - tools
+    - platform-tools
+    - extra-android-m2repository
+    - build-tools-22.0.1
+    - android-22
+  licenses:
+    # only approve the Android software licenses, they match sources
+    # the Google licenses mean proprietary software with binary blobs
+    - 'android-sdk-preview-license-52d11cd2'
+    - 'android-sdk-license-.+'
 
 sudo: false
 notifications:
   email: false
 
 script:
-  - ./gradlew clean build
+  # 'assemble' everything and run all checks that do not require a device/emulator
+  # first with the wrapper, then with the system gradle
+  - ./gradlew clean build
+  - gradle clean build
+  # start the emulator after the build to conserve memory
+  - echo no | android create avd --force -n test -t android-21 --abi armeabi-v7a
+  - emulator -avd test -no-skin -no-audio -no-window &
+  - android-wait-for-emulator
+  - adb shell input keyevent 82 &
+  # now run the tests that require a device/emulator
+  - gradle connectedCheck
+
+after_failure:
+  - find * -name lint-results.xml | xargs cat

app/build.gradle

@@ -1,6 +1,7 @@
 
 apply plugin: 'com.android.application'
 apply plugin: 'io.fabric'
+apply plugin: 'witness'
 
     android {
     compileSdkVersion 22
@@ -33,3 +34,17 @@ dependencies {
         transitive = true;
     }
 }
+
+// generate using: `gradle -q calculateChecksums | sort -V`
+dependencyVerification {
+    verify = [
+        'com.android.support:support-annotations:ab6b131ab0e1edd165d21fb4c3edadeacbee9539aa166f7f7cbae05b60dc207a',
+        'com.android.support:support-v4:355a11466727e8ba00e239416aec55ac3cd3fb4ffc9d20c4a33373085c050bd1',
+        'com.crashlytics.sdk.android:answers:5af101ef6b58a26dd32cfc13f53c63c33fb2fdcdf6990241eca22e7a8c842847',
+        'com.crashlytics.sdk.android:beta:6d7dce749fd70fa20adcf089aaed5d52f9e8e2a08f6666336e90a7555cee9718',
+        'com.crashlytics.sdk.android:crashlytics-core:2f35df62420723d4a8e58f58a376fb640d11e1660656a9aa2959bb041b5b1d15',
+        'com.crashlytics.sdk.android:crashlytics:5bbf76250f6349baf173e082b4f7d14e777aa5a7510f9bea267b445bc439247d',
+        'com.google.code.gson:gson:9466512cd8cf0bd66a8a3661685373f7b3deafded11096e044926ff5c82c7a4c',
+        'io.fabric.sdk.android:fabric:15465f60ee6a2bb53dcf84e8dd939ce92dffbffc73bfdd3432b63fa6ee2f7bae',
+    ]
+}

build.gradle

@@ -7,6 +7,7 @@ buildscript {
     dependencies {
         classpath 'com.android.tools.build:gradle:1.3.1'
         classpath 'io.fabric.tools:gradle:1.+'
+        classpath files('libs/gradle-witness.jar')
     }
 }
 

gradle/wrapper/gradle-wrapper.properties

@@ -3,4 +3,5 @@ distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-2.2.1-all.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-2.2.1-bin.zip
+distributionSha256Sum=420aa50738299327b611c10b8304b749e8d3a579407ee9e755b15921d95ff418