~ Report the size of optimized Android Dex as teamcity metric

Author: elizarov

ui/kotlinx-coroutines-android/build.gradle

@@ -1,5 +1,5 @@
 /*
- * Copyright 2016-2018 JetBrains s.r.o. Use of this source code is governed by the Apache 2.0 license.
+ * Copyright 2016-2020 JetBrains s.r.o. Use of this source code is governed by the Apache 2.0 license.
  */
 
 repositories {
@@ -66,30 +66,36 @@ class RunR8Task extends JavaExec {
     }
 }
 
-def optimizedDex = new File(buildDir, "dex-optim/")
-def unOptimizedDex = new File(buildDir, "dex-unoptim/")
+def optimizedDexDir = new File(buildDir, "dex-optim/")
+def unOptimizedDexDir = new File(buildDir, "dex-unoptim/")
+
+def optimizedDexFile = new File(optimizedDexDir, "classes.dex")
+def unOptimizedDexFile = new File(unOptimizedDexDir, "classes.dex")
 
 task runR8(type: RunR8Task, dependsOn: 'jar'){
-    outputDex = optimizedDex
+    outputDex = optimizedDexDir
     inputConfig = file('testdata/r8-test-rules.pro')
 }
 
 task runR8NoOptim(type: RunR8Task, dependsOn: 'jar'){
-    outputDex = unOptimizedDex
+    outputDex = unOptimizedDexDir
     inputConfig = file('testdata/r8-test-rules-no-optim.pro')
 }
 
 test {
     // Ensure the R8-processed dex is built and supply its path as a property to the test.
     dependsOn(runR8)
     dependsOn(runR8NoOptim)
-    def dex1 = new File(optimizedDex, "classes.dex")
-    def dex2 = new File(unOptimizedDex, "classes.dex")
 
-    inputs.files(dex1, dex2)
+    inputs.files(optimizedDexFile, unOptimizedDexFile)
+
+    systemProperty 'dexPath', optimizedDexFile.absolutePath
+    systemProperty 'noOptimDexPath', unOptimizedDexFile.absolutePath
 
-    systemProperty 'dexPath', dex1.absolutePath
-    systemProperty 'noOptimDexPath', dex2.absolutePath
+    // Output custom metric with the size of the optimized dex
+    doLast {
+        println("##teamcity[buildStatisticValue key='optimizedDexSize' value='${optimizedDexFile.length()}']")
+    }
 }
 
 tasks.withType(dokka.getClass()) {