repartition

.github/workflows/repartition.yml

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+name: patch-recovery-repartition
+
+on:
+  workflow_dispatch:
+    inputs:
+      IMG_URL:    
+        description: 'URL of recovery.img'
+        required: true
+        default: ''
+      PART_NAME:    
+        description: 'shrink a partition(keep empty if the partition is not ext4)'
+        required: false
+        default: ''
+      NEW_PART_SIZE_MB:    
+        description: 'new size for partition(unit is MB)'
+        required: false
+        default: ''
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    steps:
+
+    - name: Checkout
+      uses: actions/checkout@v4
+      with:
+        ref: main
+        path: main
+
+    - name: patch
+      run: |
+        sudo apt update
+        sudo apt -y install android-sdk-libsparse-utils
+        curl -o recovery.img -L "${{ github.event.inputs.IMG_URL }}"
+        curl -o magisk.apk -L $(curl -s https://api.github.com/repos/topjohnwu/Magisk/releases/latest | grep -Po '(?<=download_url\"\: \").*Magisk.*apk')
+        wget https://raw.githubusercontent.com/magojohnji/magiskboot-linux/main/x86_64/magiskboot
+        mkdir zzz
+        busybox unzip -oq magisk.apk -d zzz
+        mv main/boot_patch.sh ./
+        chmod +x boot_patch.sh
+        ./boot_patch.sh
+        dd if=/dev/zero of=ramdisk.img bs=1M count=32
+        mkfs.ext4 ramdisk.img
+        mkdir ramdisk
+        sudo mount -t ext4 -o rw ramdisk.img ramdisk
+        cd ramdisk
+        sudo cpio -idv < ../ramdisk.cpio
+        cd ..
+        sudo umount ramdisk
+
+    - name: generate partition
+      if: |
+        github.event.inputs.PART_NAME != null
+        && github.event.inputs.NEW_PART_SIZE_MB != null
+      run: |
+        dd if=/dev/zero of=temp.img bs=1M count=${{ github.event.inputs.NEW_PART_SIZE_MB }}
+        mkfs.ext4 temp.img
+        img2simg temp.img ${{ github.event.inputs.PART_NAME }}.img
+
+    - name: Upload to Release
+      uses: softprops/action-gh-release@v1
+      with:
+        files: | 
+          ramdisk.img
+          ${{ github.event.inputs.PART_NAME }}.img
+        name: ${{ github.run_id }}
+        tag_name: ${{ github.run_id }}
+        body: |
+          URL: ${{ github.event.inputs.IMG_URL }}
+          PART: ${{ github.event.inputs.PART_NAME }}
+          PART_SIZE: ${{ github.event.inputs.NEW_PART_SIZE_MB }}M
+      env:
+        GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}

boot_patch.sh

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+# Flags
+export KEEPVERITY=false
+export KEEPFORCEENCRYPT=false
+export RECOVERYMODE=false
+export PREINITDEVICE=cache
+
+#########
+# Unpack
+#########
+
+chmod -R 755 .
+
+CHROMEOS=false
+
+echo "Unpacking boot image"
+./magiskboot unpack recovery.img
+
+case $? in
+  0 ) ;;
+  1 )
+    echo "Unsupported/Unknown image format"
+    ;;
+  2 )
+    echo "ChromeOS boot image detected"
+    ;;
+  * )
+    echo "Unable to unpack boot image"
+    ;;
+esac
+
+###################
+# Ramdisk Restores
+###################
+
+# Test patch status and do restore
+echo "Checking ramdisk status"
+if [ -e ramdisk.cpio ]; then
+  ./magiskboot cpio ramdisk.cpio test
+  STATUS=$?
+else
+  # Stock A only legacy SAR, or some Android 13 GKIs
+  STATUS=0
+fi
+case $((STATUS & 3)) in
+  0 )  # Stock boot
+    echo "Stock boot image detected"
+    SHA1=$(./magiskboot sha1 recovery.img)
+    cp -af ramdisk.cpio ramdisk.cpio.orig 2>/dev/null
+    ;;
+  1 )  # Magisk patched
+    echo "Magisk patched boot image detected"
+    # Find SHA1 of stock boot image
+    [ -z $SHA1 ] && SHA1=$(./magiskboot cpio ramdisk.cpio sha1)
+    ./magiskboot cpio ramdisk.cpio restore
+    cp -af ramdisk.cpio ramdisk.cpio.orig 2>/dev/null
+    ;;
+  2 )  # Unsupported
+    echo "Boot image patched by unsupported programs"
+    echo "Please restore back to stock boot image"
+    ;;
+esac
+
+# Work around custom legacy Sony /init -> /(s)bin/init_sony : /init.real setup
+INIT=init
+if [ $((STATUS & 4)) -ne 0 ]; then
+  INIT=init.real
+fi
+
+##################
+# Ramdisk Patches
+##################
+
+echo "- Patching ramdisk"
+export SKIP64=""
+mkdir cpiotmp
+cd cpiotmp
+sudo cpio -idv < ../ramdisk.cpio
+cd ..
+export cpu_abi=$(grep -o 'ro.product.cpu.abi=[^ ]*' cpiotmp/prop.default | cut -d '=' -f 2)
+if [ "$cpu_abi" != "arm64-v8a" ]; then
+    cpu_abi=armeabi-v7a
+    SKIP64="#"
+fi
+
+echo -n "RANDOMSEED=" > config
+tr -dc A-Za-z0-9 </dev/urandom | head -c 8 >> config
+echo -ne "\n" >> config
+echo "KEEPVERITY=$KEEPVERITY" >> config
+echo "KEEPFORCEENCRYPT=$KEEPFORCEENCRYPT" >> config
+echo "RECOVERYMODE=$RECOVERYMODE" >> config
+echo "PREINITDEVICE=$PREINITDEVICE" >> config
+[ ! -z $SHA1 ] && echo "SHA1=$SHA1" >> config
+
+# Compress to save precious ramdisk space
+./magiskboot compress=xz zzz/lib/armeabi-v7a/libmagisk32.so magisk32.xz
+$SKIP64 ./magiskboot compress=xz zzz/lib/$cpu_abi/libmagisk64.so magisk64.xz
+./magiskboot compress=xz zzz/assets/stub.apk stub.xz
+
+./magiskboot cpio ramdisk.cpio \
+"add 0750 $INIT zzz/lib/$cpu_abi/libmagiskinit.so" \
+"mkdir 0750 overlay.d" \
+"mkdir 0750 overlay.d/sbin" \
+"add 0644 overlay.d/sbin/magisk32.xz magisk32.xz" \
+"$SKIP64 add 0644 overlay.d/sbin/magisk64.xz magisk64.xz" \
+"add 0644 overlay.d/sbin/stub.xz stub.xz" \
+"patch" \
+"backup ramdisk.cpio.orig" \
+"mkdir 000 .backup" \
+"add 000 .backup/.magisk config"