Closes #263: Integrate service-glean component.

app/build.gradle

@@ -1,3 +1,7 @@
+plugins {
+    id "com.jetbrains.python.envs" version "0.0.26"
+}
+
 apply plugin: 'com.android.application'
 apply plugin: 'kotlin-android'
 apply plugin: 'kotlin-android-extensions'
@@ -119,7 +123,9 @@ dependencies {
     implementation Deps.mozilla_feature_session
     implementation Deps.mozilla_feature_toolbar
     implementation Deps.mozilla_feature_tabs
+
     implementation Deps.mozilla_service_fretboard
+    implementation Deps.mozilla_service_glean
 
     implementation Deps.mozilla_support_ktx
 
@@ -152,4 +158,15 @@ android.applicationVariants.all { variant ->
     } else {
         buildConfigField 'boolean', 'CRASH_REPORTING', 'false'
     }
+
+    // Activating telemetry only if command line parameter was provided (in automation)
+    if (project.hasProperty("telemetry") && project.property("telemetry") == "true") {
+        buildConfigField 'boolean', 'TELEMETRY', 'true'
+    } else {
+        buildConfigField 'boolean', 'TELEMETRY', 'false'
+    }
 }
+
+// Normally this should use the same version as the glean dependency. But since we are currently using AC snapshots we
+// can't reference a git tag with a specific version here. So we are just using "master" and hoping for the best.
+apply from: 'https://github.com/mozilla-mobile/android-components/raw/master/components/service/glean/scripts/sdk_generator.gradle'

app/src/main/java/org/mozilla/fenix/FenixApplication.kt

@@ -13,6 +13,7 @@ import mozilla.components.service.fretboard.Fretboard
 import mozilla.components.service.fretboard.ValuesProvider
 import mozilla.components.service.fretboard.source.kinto.KintoExperimentSource
 import mozilla.components.service.fretboard.storage.flatfile.FlatFileExperimentStorage
+import mozilla.components.service.glean.Glean
 import mozilla.components.support.base.log.Log
 import mozilla.components.support.base.log.logger.Logger
 import mozilla.components.support.base.log.sink.AndroidLogSink
@@ -29,9 +30,15 @@ class FenixApplication : Application() {
         Log.addSink(AndroidLogSink())
 
         setupCrashReporting()
+        setupGlean(this)
         loadExperiments()
     }
 
+    private fun setupGlean(context: Context) {
+        Glean.initialize(context)
+        Glean.setMetricsEnabled(BuildConfig.TELEMETRY)
+    }
+
     private fun loadExperiments() {
         val experimentsFile = File(filesDir, EXPERIMENTS_JSON_FILENAME)
         val experimentSource = KintoExperimentSource(

buildSrc/src/main/java/Dependencies.kt

@@ -75,6 +75,7 @@ object Deps {
     const val mozilla_feature_toolbar = "org.mozilla.components:feature-toolbar:${Versions.mozilla_android_components}"
 
     const val mozilla_service_fretboard = "org.mozilla.components:service-fretboard:${Versions.mozilla_android_components}"
+    const val mozilla_service_glean = "org.mozilla.components:service-glean:${Versions.mozilla_android_components}"
 
     const val mozilla_lib_crash = "org.mozilla.components:lib-crash:${Versions.mozilla_android_components}"
 

docs/telemetry.md

@@ -0,0 +1,7 @@
+# Telemetry
+
+Nightly versions of Fenix (build on Taskcluster) send a "baseline" ping to Mozilla's telemetry service.
+
+## Baseline ping
+
+Fenix crates and tries to send a "baseline" ping when the app goes to the background. This baseline ping is defined by the [Glean](https://github.com/mozilla-mobile/android-components/tree/master/components/service/glean) component and [documented in the Android Components repository](https://github.com/mozilla-mobile/android-components/blob/master/components/service/glean/docs/baseline.md).