name: Add zeromount
description: add zeromount to kernel

runs:
 using: composite
 steps:
  - name: clone zeromount
    shell: bash
    run: | 
     git clone https://github.com/jimsterino98/Super-Builders.git
     ZEROMOUNT="$ROOT/Super-Builders"
     echo "ZEROMOUNT=$ZEROMOUNT" >> $GITHUB_ENV
     
  - name: apply zeromount patches
    shell: bash
    run: |
     echo "adding zeromount..."
            
      cd "$COMMON"
      cp "$ZEROMOUNT/$ANDROID_VER-$KERNEL_VER/WildKSU/patches/60_zeromount-$ANDROID_VER-$KERNEL_VER.patch" .
      #patch -p1 < 51_enhanced_susfs_gki-$ANDROID_VER-$KERNEL_VER.patch || true
      patch -p1 < 60_zeromount-$ANDROID_VER-$KERNEL_VER.patch || true
      rm -rf 60_zeromount-$ANDROID_VER-$KERNEL_VER.patch

      if [ -f fs/proc/task_mmu.c.rej ]; then
        echo "Fixing task_mmu.c..."

        sed -i '/pgoff = ((loff_t)vma->vm_pgoff) << PAGE_SHIFT;/a\
        #ifdef CONFIG_ZEROMOUNT\
        \tzeromount_spoof_mmap_metadata(inode, \&dev, \&ino);\
        #endif' fs/proc/task_mmu.c
      fi

      if [ -f fs/stat.c.rej ]; then
       echo "fixing stat.c."

        if ! grep -q 'zeromount_stat_hook(dfd, filename, stat, request_mask, flags)' fs/stat.c; then
          perl -0pi -e 's@(static int vfs_statx\(.*?\)\s*\{.*?orig_flow:\n#endif\n)@$1\n#ifdef CONFIG_ZEROMOUNT\n\tif (filename) {\n\t\tint zm_ret = zeromount_stat_hook(dfd, filename, stat, request_mask, flags);\n\t\tif (zm_ret != -ENOENT)\n\t\t\treturn zm_ret;\n\t}\n#endif\n\n@s' fs/stat.c
        fi
      fi

      if [ -f fs/Kconfig.rej ]; then
        echo "Applying Kconfig zeromount fix..."

        if ! grep -q '^config ZEROMOUNT$' fs/Kconfig; then
            perl -0pi -e 's@(config IO_WQ\n\tbool\n)@\1\nconfig ZEROMOUNT\n\tbool "ZeroMount Path Redirection Subsystem"\n\tdefault y\n\thelp\n\t  ZeroMount allows path redirection and virtual file injection\n\t  without mounting filesystems. Useful for systemless modifications.\n\n@' fs/Kconfig
        fi
      fi
      #patch -p1 < 70_ksu_safety-wksu-$KERNEL_VER.patch || true

  - name: apply zeromount patches
    shell: bash
    run: |
      "$COMMON/scripts/config" --file "$GKI_DEFCONFIG" --enable CONFIG_ZEROMOUNT