action.yaml

name: Update Hugo Version Pin in Netlify Config
branding:
  icon: arrow-up-circle
  color: purple
description: |
  Update the version pin for Hugo in a netlify.toml file if needed.
inputs:
  no-install:
    description: Specify to skip the hugo install step
    required: false
    default: 'false'
  no-write:
    description: Specify to prevent updating the netlify.toml
    required: false
    default: 'false'
  line-endings:
    description: Whether to write LF or CRLF line endings in netlify.toml.
    required: false
    default: 'LF'
  netlify-toml-path:
    description: Path to the netlify.toml config file from project root
    required: false
    default: './netlify.toml'
outputs:
  updatedConfig:
    description: |
      Whether or not this action updated the netlify.toml config file
    value: "${{ steps.update-netlify-toml.outputs.updated }}"
  latestVersion:
    description: |
      The latest version of hugo available if installed via this action
    value: "${{ steps.get-hugo.outputs.version }}"
runs:
  using: composite
  steps:
    - name: Setup Hugo
      if: ${{ inputs.no-install != 'true' }}
      uses: peaceiris/actions-hugo@v2
      with:
        hugo-version: 'latest'
        extended: true
    - name: Get Hugo Version
      shell: pwsh
      id: get-hugo
      run: |
        (hugo version) -match 'hugo v(\d+\.\d+\.\d+)-'
        if ([string]::IsNullOrEmpty($Matches[1])) {
          Throw "Could not find hugo version! Is it installed and available?"
        }
        echo "::set-output name=version::$($Matches[1])"
    - name: Check Update Outputs
      shell: pwsh
      run: |
        "${{ steps.get-hugo.outputs.version }}"
    - name: Update Netlify TOML
      id: update-netlify-toml
      shell: pwsh
      run: |
        # Initialize output for updated status
        echo "::set-output name=updated::$false"
        # Save input as variables for easier use
        $LineEndingInput = '${{ inputs.line-endings }}'
        $NetlifyTomlFilePath = '${{ inputs.netlify-toml-path }}'
        # Process LineEnding input into PowerShell line endings
        $LineEnding = Switch ($LineEndingInput) {
          'LF' { "`n" }
          'CRLF' { "`r`n" }
          Default {
            Write-Warning "Invalid line ending specified ('$LineEndingInput'): Must be LF or CRLF; defaulting to LF"
            "`n"
          }
        }
        # Convert the string output of current version for easier comparison
        $LatestVersion = [version]::new('${{ steps.get-hugo.outputs.version }}')
        $CurrentNetlifyToml = Get-Content -Path $NetlifyTomlFilePath
        # Process the config to see if any updates are needed
        "Current NetlifyConfig:${LineEnding}`t$($CurrentNetlifyToml -join "${LineEnding}`t")"
        $NetlifyTomlToWrite = $CurrentNetlifyToml |
          ForEach-Object -Process {
            if ($_ -match '^HUGO_VERSION = "(.+)"') {
              $CurrentVersion = [version]::new($Matches[1])
              If ($LatestVersion -gt $CurrentVersion) {
                return $_ -replace $CurrentVersion.ToString(), $LatestVersion.ToString()
              }
            }
            # Latest version not newer than current version or line is not a hugo version
            $_
          }
        "Updated NetlifyConfig:${LineEnding}`t$($NetlifyTomlToWrite -join "${LineEnding}`t")"
        If (($CurrentNetlifyToml -join $LineEnding) -ne ($NetlifyTomlToWrite -join $LineEnding)) {
          If ('${{ inputs.no-write }}' -ne 'true') {
            # Append a final newline and join on line endings
            # This is necessary to prevent accidentally appending the wrong final newline
            $NetlifyTomlToWrite = ($NetlifyTomlToWrite + "") -join $LineEnding
            $NetlifyTomlToWrite | Out-File -FilePath $NetlifyTomlFilePath -Encoding utf8NoBOM -Force -NoNewline
            echo "::set-output name=updated::$true"
          } Else {
            Write-Warning "Parameter no-write specified; not updating netlify.toml despite a newer version being available"
          }
        } Else {
          # No changes to be made
          echo "::set-output name=updated::$false"
        }