Merge pull request #252 from eighthave/png-repro-build

manually use `aapt singleCrunch` for reproducible builds

app/build.gradle

@@ -31,6 +31,9 @@ android {
         minSdkVersion 16
         targetSdkVersion 29
     }
+    aaptOptions {
+        cruncherEnabled = false
+    }
     lintOptions {
         checkReleaseBuilds false
         // Or, if you prefer, you can continue to check for errors in release builds,

orbotservice/build.gradle

@@ -25,6 +25,10 @@ android {
         }
     }
 
+    aaptOptions {
+        cruncherEnabled = false
+    }
+
     lintOptions {
         abortOnError false
     }

tools/png-pre-compress

@@ -0,0 +1,18 @@
+#!/usr/bin/env sh
+
+set -e
+set -x
+
+for f in `find $(dirname $0)/../*/src/ -type f -name \*.png`; do
+    echo $f | grep -Eo '\.9\.png$' && continue  # do not optimized 9-patch, it breaks them
+    tmpfile=$(mktemp)
+    aapt singleCrunch -v -i $f -o $tmpfile
+    exiftool -all= $tmpfile
+    mv $tmpfile $f
+done
+
+for f in `find $(dirname $0)/../fastlane/metadata/android/ -type f -name \*.png`; do
+    exiftool -all= $f
+    tmpfile=$(mktemp)
+    (zopflipng --filters=01234mepb --lossy_8bit --lossy_transparent -y $f $tmpfile && mv $tmpfile $f) &
+done