name: Magisk

on:
  workflow_dispatch:
    inputs:
      magisk_apk:
        description: 'Download link to magisk apk.'
        required: true

jobs:
  build:
    runs-on: ubuntu-20.04
    strategy:
      matrix:
        arch: [x64, arm64]
    steps:
      - name: Dependencies
        run: |
          pip3 install beautifulsoup4 lxml
          sudo apt-get update && sudo apt-get install setools
      - name: Download AWS
        shell: python
        run: |
          import requests
          from bs4 import BeautifulSoup
          import re
          import zipfile
          import os
          import urllib.request

          res = requests.post("https://store.rg-adguard.net/api/GetFiles", "type=CategoryId&url=858014f3-3934-4abe-8078-4aa193e74ca8&ring=WIS&lang=en-US", headers={
              "content-type": "application/x-www-form-urlencoded"
          })
          html = BeautifulSoup(res.content, "lxml")
          a = html.find("a", string=re.compile("MicrosoftCorporationII\.WindowsSubsystemForAndroid_.*\.msixbundle"))
          link = a["href"]

          print(f"downloading link: {link}", flush=True)

          out_file = "wsa.zip"

          arch = "${{ matrix.arch }}"

          if not os.path.isfile(out_file):
              urllib.request.urlretrieve(link, out_file)

          zip_name = ""
          with zipfile.ZipFile(out_file) as zip:
              for f in zip.filelist:
                  if arch in f.filename.lower():
                      zip_name = f.filename
                      if not os.path.isfile(zip_name):
                          print(f"unzipping to {zip_name}", flush=True)
                          zip.extract(f)
                      break

          with zipfile.ZipFile(zip_name) as zip:
              if not os.path.isdir(arch):
                  print(f"unzipping from {zip_name}", flush=True)
                  zip.extractall(arch)
          print("done", flush=True)
      - name: Download Magisk
        shell: python
        run: |
          import urllib.request
          import zipfile
          import os

          magisk_apk = """${{ github.event.inputs.magisk_apk }}"""

          out_file = "magisk.zip"

          arch = "${{ matrix.arch }}"

          abi_map={"x64" : ["x86_64", "x86"], "arm64" : ["arm64-v8a", "armeabi-v7a"]}

          if not os.path.isfile(out_file):
              urllib.request.urlretrieve(magisk_apk, out_file)

          def extract_as(zip, name, as_name, dir):
              info = zip.getinfo(name)
              info.filename = as_name
              zip.extract(info, dir)

          with zipfile.ZipFile(out_file) as zip:
              extract_as(zip, f"lib/{ abi_map[arch][0] }/libmagisk64.so", "magisk64", "magisk")
              extract_as(zip, f"lib/{ abi_map[arch][1] }/libmagisk32.so", "magisk32", "magisk")
              extract_as(zip, f"lib/{ abi_map[arch][0] }/libmagiskinit.so", "magiskinit", "magisk")
              extract_as(zip, f"lib/{ abi_map['x64'][0] }/libmagiskinit.so", "magiskpolicy", "magisk")
      - name: Expand images
        run: |
          e2fsck -yf ${{ matrix.arch }}/vendor.img
          resize2fs ${{ matrix.arch }}/vendor.img 320M
      - name: Mount images
        run: |
          sudo mkdir system
          sudo mount -o loop ${{ matrix.arch }}/system.img system
          sudo mount -o loop ${{ matrix.arch }}/vendor.img system/vendor
      - name: Modify images
        run: |
          sudo mkdir system/sbin
          sudo chcon --reference system/init.environ.rc system/sbin
          sudo chown root:root system/sbin
          sudo chmod 0700 system/sbin
          sudo cp magisk/* system/sbin/
          sudo find system/sbin -type f -exec chmod 0755 {} \;
          sudo find system/sbin -type f -exec chown root:root {} \;
          sudo find system/sbin -type f -exec chcon --reference system/product {} \;
          chmod +x magisk/magiskpolicy
          echo '/dev/wsa-magisk(/.*)?    u:object_r:magisk_file:s0' | sudo tee -a system/vendor/etc/selinux/vendor_file_contexts
          sudo ./magisk/magiskpolicy --load system/vendor/etc/selinux/precompiled_sepolicy --save system/vendor/etc/selinux/precompiled_sepolicy --magisk "allow * magisk_file lnk_file *"
          sudo tee -a system/system/etc/init/hw/init.rc <<EOF

          on post-fs-data
              start logd
              start adbd
              mkdir /dev/wsa-magisk
              mount tmpfs tmpfs /dev/wsa-magisk mode=0755
              copy /sbin/magisk64 /dev/wsa-magisk/magisk64
              chmod 0755 /dev/wsa-magisk/magisk64
              symlink ./magisk64 /dev/wsa-magisk/magisk
              symlink ./magisk64 /dev/wsa-magisk/su
              symlink ./magisk64 /dev/wsa-magisk/resetprop
              copy /sbin/magisk32 /dev/wsa-magisk/magisk32
              chmod 0755 /dev/wsa-magisk/magisk32
              copy /sbin/magiskinit /dev/wsa-magisk/magiskinit
              chmod 0755 /dev/wsa-magisk/magiskinit
              symlink ./magiskinit /dev/wsa-magisk/magiskpolicy
              mkdir /dev/wsa-magisk/.magisk 700
              mkdir /dev/wsa-magisk/.magisk/mirror 700
              mkdir /dev/wsa-magisk/.magisk/block 700
              rm /dev/.magisk_unblock
              start FAhW7H9G5sf
              wait /dev/.magisk_unblock 40
              rm /dev/.magisk_unblock

          service FAhW7H9G5sf /dev/wsa-magisk/magisk --post-fs-data
              user root
              seclabel u:r:magisk:s0
              oneshot

          service HLiFsR1HtIXVN6 /dev/wsa-magisk/magisk --service
              class late_start
              user root
              seclabel u:r:magisk:s0
              oneshot

          on property:sys.boot_completed=1
              start YqCTLTppv3ML

          service YqCTLTppv3ML /dev/wsa-magisk/magisk --boot-complete
              user root
              seclabel u:r:magisk:s0
              oneshot
          EOF
      - name: Umount images
        run: |
          sudo umount system/vendor
          sudo umount system
      - name: Shrink images
        run: |
          e2fsck -yf ${{ matrix.arch }}/system.img
          resize2fs ${{ matrix.arch }}/system.img
          e2fsck -yf ${{ matrix.arch }}/vendor.img
          resize2fs ${{ matrix.arch }}/vendor.img
      - name: Remove signature
        run: |
          rm -rf ${{ matrix.arch }}/\[Content_Types\].xml ${{ matrix.arch }}/AppxBlockMap.xml ${{ matrix.arch }}/AppxSignature.p7x ${{ matrix.arch }}/AppxMetadata
      - name: Upload WSA
        uses: actions/upload-artifact@v2
        with:
          name: WSA-with-Magisk_${{ matrix.arch }}
          path: './${{ matrix.arch }}/*'