From c43ced8b008492ae839e43786ea5443f8cdacd63 Mon Sep 17 00:00:00 2001
From: Balazs Toldi <balazs@toldi.eu>
Date: Fri, 20 Oct 2023 09:31:53 +0200
Subject: [PATCH] Merge Reproducible Builds

This commit makes release builds reproducible. This will help folks update the app from F-Droid when it's released there.
---
 .woodpecker/build.yaml   |  1 +
 .woodpecker/nightly.yaml |  1 +
 app/build.gradle         | 55 ++++++++++++++++++++++++++++++++++++++++
 build.gradle             |  6 +----
 scripts/fixEventBus.py   | 32 +++++++++++++++++++++++
 5 files changed, 90 insertions(+), 5 deletions(-)
 create mode 100644 scripts/fixEventBus.py

diff --git a/.woodpecker/build.yaml b/.woodpecker/build.yaml
index 7df8928d..9e0e30fc 100644
--- a/.woodpecker/build.yaml
+++ b/.woodpecker/build.yaml
@@ -2,6 +2,7 @@ steps:
   build:
     image: alvrme/alpine-android:android-33-jdk11
     commands:
+      - apk add --no-cache python3
       - ./gradlew :app:assembleRelease
     when:
       path: [ app/**, build.gradle ]
diff --git a/.woodpecker/nightly.yaml b/.woodpecker/nightly.yaml
index 9c90e61f..36c306d1 100644
--- a/.woodpecker/nightly.yaml
+++ b/.woodpecker/nightly.yaml
@@ -8,6 +8,7 @@ steps:
   build:
     image: alvrme/alpine-android:android-33-jdk11
     commands:
+      - apk add --no-cache python3
       - ./gradlew :app:assembleNightly
   sign:
     image: alvrme/alpine-android:android-33-jdk11
diff --git a/app/build.gradle b/app/build.gradle
index c9d7175e..234240d3 100644
--- a/app/build.gradle
+++ b/app/build.gradle
@@ -98,6 +98,30 @@ android {
         doNotStrip '**/*.so'
     }
     namespace 'eu.toldi.infinityforlemmy'
+
+
+    task rearrangeClass(type: Exec) {
+        commandLine 'python', '../scripts/fixEventBus.py'
+    }
+
+    applicationVariants.all { variant ->
+        if (variant.name == 'release') {
+            task("compileSingleFile${variant.name.capitalize()}", type: JavaCompile, dependsOn: rearrangeClass) {
+                def filePath = project.rootDir.absolutePath + '/app/build/generated/ap_generated_sources/release/out/eu/toldi/infinityforlemmy/'
+                source = files(filePath)
+                includes = ["**/EventBusIndex.java"]
+                classpath = variant.getCompileClasspath() + files(project.rootDir.absolutePath + '/app/build/intermediates/javac/release/classes')
+                destinationDir = file("$buildDir/intermediates/javac/release/classes")
+            }
+
+            tasks.withType(JavaCompile).all { task ->
+                if (task.name == 'compileReleaseJavaWithJavac') {
+                    task.finalizedBy "compileSingleFile${variant.name.capitalize()}"
+                }
+            }
+        }
+    }
+
 }
 
 dependencies {
@@ -246,3 +270,34 @@ dependencies {
     //debugImplementation 'com.squareup.leakcanary:leakcanary-android:x.y'
 }
 
+// NB: Android Studio can't find the imports; this does not affect the
+// actual build since Gradle can find them just fine.
+
+import com.android.tools.profgen.ArtProfileKt
+import com.android.tools.profgen.ArtProfileSerializer
+import com.android.tools.profgen.DexFile
+
+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, "")
+                        }
+                    }
+                }
+            }
+        }
+    }
+}
\ No newline at end of file
diff --git a/build.gradle b/build.gradle
index 4eb65b79..e3cc6ea7 100644
--- a/build.gradle
+++ b/build.gradle
@@ -24,8 +24,4 @@ allprojects {
         maven { url "https://jitpack.io" }
         jcenter()
     }
-}
-
-task clean(type: Delete) {
-    delete rootProject.buildDir
-}
+}
\ No newline at end of file
diff --git a/scripts/fixEventBus.py b/scripts/fixEventBus.py
new file mode 100644
index 00000000..b927f7a6
--- /dev/null
+++ b/scripts/fixEventBus.py
@@ -0,0 +1,32 @@
+import re
+import sys
+
+
+def rearrange(filename):
+    with open(filename, 'r') as file:
+        content = file.read()
+
+    # Regex to find the blocks of code to rearrange
+    pattern = re.compile(r'(putIndex\(new SimpleSubscriberInfo\(.*?\)\);)', re.DOTALL)
+    blocks = pattern.findall(content)
+
+    # Sort blocks based on the class names mentioned in SimpleSubscriberInfo instances
+    sorted_blocks = sorted(blocks, key=lambda x: re.search(r'SimpleSubscriberInfo\((.*?),', x).group(1))
+
+    # Replace the original blocks with the sorted blocks
+    sorted_content = pattern.sub(lambda match: sorted_blocks.pop(0), content)
+
+    with open(filename, 'w') as file:
+        file.write(sorted_content)
+
+
+# Project root relative to the script
+project_root = __file__[:-len('/scripts/fixEventBus.py')]
+
+path = './build/generated/ap_generated_sources/release/out/eu/toldi/infinityforlemmy/EventBusIndex.java'
+
+# Print the path to the file to stderr
+print(path, file=sys.stderr)
+
+# Call the function with the path to EventBusIndex.java
+rearrange(path)