name: 'Kernel Fixes'
description: 'Applies compatibility fixes based on android/kernel/sublevel'
inputs:
  android_version:
    required: true
    type: string
  kernel_version:
    required: true
    type: string
  sublevel:
    required: true
    type: string
  os_patch_level:
    required: true
    type: string

runs:
  using: composite
  steps:
    - shell: bash  
      if: false
      run: |
        set -euo pipefail
        GLIBC_VERSION="$(ldd --version 2>/dev/null | head -n 1 | awk '{print $NF}')"
        echo "[INFO] Detected GLIBC version: $GLIBC_VERSION"
        if [ "$(printf '%s\n' "2.38" "$GLIBC_VERSION" | sort -V | head -n 1)" = "2.38" ]; then
          echo "[INFO] GLIBC >= 2.38, applying Makefile fix."
          cd "$GITHUB_WORKSPACE/kernel/common"
          sed -i '/\$(Q)\$(MAKE) -C \$(SUBCMD_SRC) OUTPUT=\$(abspath \$(dir \$@))\/ \$(abspath \$@)/s//$(Q)$(MAKE) -C $(SUBCMD_SRC) EXTRA_CFLAGS="$(CFLAGS)" OUTPUT=$(abspath $(dir $@))\/ $(abspath $@)/' tools/bpf/resolve_btfids/Makefile 2>/dev/null || true
          if [[ "${{ inputs.android_version }}" == "android13" && "${{ inputs.kernel_version }}" == "5.10" && "${{ inputs.sublevel }}" -le 186 ]] || \
             [[ "${{ inputs.android_version }}" == "android13" && "${{ inputs.kernel_version }}" == "5.15" && "${{ inputs.sublevel }}" -le 119 ]] || \
             [[ "${{ inputs.android_version }}" == "android14" && "${{ inputs.kernel_version }}" == "5.15" && "${{ inputs.sublevel }}" -le 110 ]]; then
            echo "[INFO] Applying parse-options.c fixes."
            sed -i '/char \*buf = NULL;/a int i;' tools/lib/subcmd/parse-options.c 2>/dev/null || true
            sed -i 's/for (int i = 0; subcommands\[i\]; i++) {/for (i = 0; subcommands[i]; i++) {/' tools/lib/subcmd/parse-options.c 2>/dev/null || true
            sed -i '/if (subcommands) {/a int i;' tools/lib/subcmd/parse-options.c 2>/dev/null || true
            sed -i 's/for (int i = 0; subcommands\[i\]; i++)/for (i = 0; subcommands[i]; i++)/' tools/lib/subcmd/parse-options.c 2>/dev/null || true
          fi
        else
          echo "[SKIP] GLIBC version < 2.38, skipping Makefile fix."
        fi
        

        echo "[INFO] Checking for android15 + kernel 6.6 include fix..."
        if [ "${{ inputs.android_version }}" = "android15" && "${{ inputs.kernel_version }}" = "6.6" ]; then
          echo "[MATCH] android15 + 6.6, checking for fs.h include."
          cd "$GITHUB_WORKSPACE/kernel/common"
          if ! grep -qxF '#include <trace/hooks/fs.h>' ./fs/namespace.c; then
            echo "[INFO] Adding missing #include <trace/hooks/fs.h> to fs/namespace.c."
            sed -i '/#include <trace\/hooks\/blk.h>/a #include <trace\/hooks\/fs.h>' ./fs/namespace.c
          else
            echo "[INFO] #include <trace/hooks/fs.h> already present."
          fi
        fi

    - shell: bash
      if: ${{ (inputs.kernel_version == '5.10' && inputs.android_version == 'android12' && inputs.sublevel == 226) || (inputs.kernel_version == '5.10' && inputs.android_version == 'android13' && inputs.sublevel == 223) || (inputs.kernel_version == '5.15' && inputs.android_version == 'android13' && inputs.sublevel == 167)  || (inputs.kernel_version == '5.10' && inputs.android_version == 'android13' && inputs.sublevel == 223) || (inputs.kernel_version == '5.15' && inputs.android_version == 'android14' && inputs.sublevel == 167) }}
      working-directory: ${{ github.workspace }}/kernel/common
      run: |
        sed -i 's/\s*vm_flags_clear(new_vma, VM_PAD_MASK);/                new_vma->vm_flags \&= ~VM_PAD_MASK;/' mm/mmap.c