name: "Go cache"
description: Restore and save Go build and module caches.
inputs:
  cache-path:
    description: "Optional newline-delimited cache paths. Defaults to go env GOCACHE and GOMODCACHE."
    required: false
    default: ""
  key-prefix:
    description: "Prefix for the cache key."
    required: false
    default: "go"
  download-modules:
    description: "Whether to run go mod download after restoring cache."
    required: false
    default: "true"
runs:
  using: "composite"
  steps:
    - name: Compute Go cache key
      id: go-cache
      shell: bash
      run: |
        set -euo pipefail

        if [[ -n "${INPUT_CACHE_PATH}" ]]; then
          paths="${INPUT_CACHE_PATH}"
        else
          paths="$(printf '%s\n%s' "$(go env GOCACHE)" "$(go env GOMODCACHE)")"
        fi

        go_version="$(go env GOVERSION)"
        paths_hash="$(printf '%s\n' "${paths}" | git hash-object --stdin)"
        hash="$(
          {
            printf '%s\n' "${go_version}"
            for file in go.mod go.sum; do
              if [[ -f "${file}" ]]; then
                git hash-object "${file}"
              fi
            done
          } | git hash-object --stdin
        )"

        {
          echo "path<<EOF"
          echo "${paths}"
          echo "EOF"
          echo "key=${INPUT_KEY_PREFIX}-${RUNNER_OS}-${RUNNER_ARCH}-${paths_hash}-${hash}"
          echo "restore-key=${INPUT_KEY_PREFIX}-${RUNNER_OS}-${RUNNER_ARCH}-${paths_hash}-"
        } >> "$GITHUB_OUTPUT"
      env:
        INPUT_CACHE_PATH: ${{ inputs.cache-path }}
        INPUT_KEY_PREFIX: ${{ inputs.key-prefix }}

    - name: Restore Go cache, save on main
      if: ${{ github.ref == 'refs/heads/main' }}
      uses: actions/cache@27d5ce7f107fe9357f9df03efb73ab90386fccae # v5.0.5
      with:
        path: ${{ steps.go-cache.outputs.path }}
        key: ${{ steps.go-cache.outputs.key }}
        restore-keys: |
          ${{ steps.go-cache.outputs.restore-key }}

    - name: Restore Go cache read-only
      if: ${{ github.ref != 'refs/heads/main' }}
      uses: actions/cache/restore@27d5ce7f107fe9357f9df03efb73ab90386fccae # v5.0.5
      with:
        path: ${{ steps.go-cache.outputs.path }}
        key: ${{ steps.go-cache.outputs.key }}
        restore-keys: |
          ${{ steps.go-cache.outputs.restore-key }}

    - name: Download Go modules
      if: ${{ inputs.download-modules == 'true' }}
      shell: bash
      run: ./.github/scripts/retry.sh -- go mod download -x