Bug: baseline.profm not deterministic :: Patch 1

Author: ShiftHackZ

app/build.gradle

@@ -1,3 +1,7 @@
+import com.android.tools.profgen.ArtProfileKt
+import com.android.tools.profgen.ArtProfileSerializer
+import com.android.tools.profgen.DexFile
+
 plugins {
     id 'com.android.application'
     id 'org.jetbrains.kotlin.android'
@@ -91,3 +95,33 @@ dependencies {
 kapt {
     correctErrorTypes true
 }
+
+// Workaround for "Bug: baseline.profm not deterministic"
+//
+// Reference     : https://f-droid.org/docs/Reproducible_Builds/#bug-baselineprofm-not-deterministic
+// Fix snippet   : https://gist.github.com/obfusk/61046e09cee352ae6dd109911534b12e
+// Issue tracker : https://issuetracker.google.com/issues/231837768
+project.afterEvaluate {
+    tasks.each { task ->
+        if (task.name.startsWith("compile") && task.name.endsWith("ReleaseArtProfile")) {
+            task.doLast {
+                outputs.files.each { file ->
+                    if (file.name.endsWith(".profm")) {
+                        println("Sorting ${file} ...")
+                        def version = ArtProfileSerializer.valueOf("METADATA_0_0_2")
+                        def profile = ArtProfileKt.ArtProfile(file)
+                        def keys = new ArrayList(profile.profileData.keySet())
+                        def sortedData = new LinkedHashMap()
+                        Collections.sort keys, new DexFile.Companion()
+                        keys.each { key -> sortedData[key] = profile.profileData[key] }
+                        new FileOutputStream(file).with {
+                            write(version.magicBytes$profgen)
+                            write(version.versionBytes$profgen)
+                            version.write$profgen(it, sortedData, "")
+                        }
+                    }
+                }
+            }
+        }
+    }
+}