name: 'Setup SUSFS Branch'
description: 'Clone SUSFS repo and cherry-pick commits'
inputs:
  susfs_commit:
    description: 'SUSFS commit hash (empty = latest on auto-derived gki-{version} branch)'
    required: false
    default: ""
  version:
    description: 'Kernel config version (e.g., android15-6.6)'
    required: true

runs:
  using: "composite"
  steps:
    - name: Clone SUSFS Branch
      shell: bash
      run: |
        set -euo pipefail

        # Retry transient network errors (up to 5 attempts, 5s backoff).
        retry() {
          local n=0
          until [ "$n" -ge 5 ]; do
            "$@" && return 0
            n=$((n+1))
            echo "retry $n/5 failed for: $*" >&2
            sleep 5
          done
          return 1
        }

        SUSFS_BRANCH="gki-${{ inputs.version }}"
        SUSFS_REPO="https://gitlab.com/simonpunk/susfs4ksu.git"

        echo "Preparing SUSFS for branch: $SUSFS_BRANCH"
        echo "Cloning latest from $SUSFS_BRANCH..."
        retry git clone "$SUSFS_REPO" -b "$SUSFS_BRANCH" susfs4ksu

        if [ -n "${{ inputs.susfs_commit }}" ]; then
          echo "Checking out SUSFS commit: ${{ inputs.susfs_commit }}"
          retry git -C "${{ github.workspace }}/susfs4ksu" checkout "${{ inputs.susfs_commit }}"
        fi

        cd "${{ github.workspace }}/susfs4ksu"
        SUSFS_COMMIT="$(git rev-parse HEAD)"
        echo "SUSFS_COMMIT=$SUSFS_COMMIT" >> "$GITHUB_ENV"
        echo "Using SUSFS commit: $SUSFS_COMMIT"

        patch -p1 < "${{ github.workspace }}/kernel_patches/pershoot/susfs4ksu/0001-pershoot-Allow-core-to-be-built-with-no-features.patch"
        patch -p1 < "${{ github.workspace }}/kernel_patches/pershoot/susfs4ksu/0002-pershoot-Implement-SuSFS-and-Toolkit-coexistence.patch"