.github/workflows/prepare_release.yml

name: Create draft release

on:
  workflow_dispatch:
    inputs:
      release_type:
        description: 'Release Type'
        required: true
        type: choice
        default: 'Minor (E.g. 5.2.1 to 5.3.0)'
        options:
          - Major (E.g. 5.2.1 to 6.0.0)
          - Minor (E.g. 5.2.1 to 5.3.0)
          - Patch (E.g. 5.2.1 to 5.2.2)

jobs:
  Create-Release:
      runs-on: ubuntu-latest

      permissions:
        # Give the default GITHUB_TOKEN write permission to commit and push the
        # added or changed files to the repository.
        contents: write

      outputs:
        release_url: ${{ steps.create-draft-release.outputs.url }}

      steps:
        - name: Checkout code
          uses: actions/checkout@v4
          with:
            ref: ${{ github.head_ref }}

        - name: Update the version
          id: bump_version
          shell: pwsh
          run: |
            # Extract current version
            $header = Get-Content ./libdivide.h
            $major_ver = [int](($header -match "LIBDIVIDE_VERSION_MAJOR")[0] -Split " ")[-1]
            $minor_ver = [int](($header -match "LIBDIVIDE_VERSION_MINOR")[0] -Split " ")[-1]
            $patch_ver = [int](($header -match "LIBDIVIDE_VERSION_PATCH")[0] -Split " ")[-1]
            $current_version=@($major_ver, $minor_ver, $patch_ver) -Join "."

            # Increment version
            if ("${{ github.event.inputs.release_type }}" -like "Patch*") {
                $patch_ver = $patch_ver + 1
            } elseif ("${{ github.event.inputs.release_type }}" -like "minor*") {
                $minor_ver = $minor_ver + 1
                $patch_ver = 0
            } else { # Must be major version
                $major_ver = $major_ver + 1
                $minor_ver = 0
                $patch_ver = 0
            }
            $new_version=@($major_ver, $minor_ver, $patch_ver) -Join "."

            # Update header file
            $header = $header -replace "#define LIBDIVIDE_VERSION ""\d+\.\d+\.\d+""", "#define LIBDIVIDE_VERSION ""$new_version"""
            $header = $header -replace "#define LIBDIVIDE_VERSION_MAJOR \d+", "#define LIBDIVIDE_VERSION_MAJOR $major_ver"
            $header = $header -replace "#define LIBDIVIDE_VERSION_MINOR \d+", "#define LIBDIVIDE_VERSION_MINOR $minor_ver"
            $header = $header -replace "#define LIBDIVIDE_VERSION_PATCH \d+", "#define LIBDIVIDE_VERSION_PATCH $patch_ver"
            $header | Set-Content ./libdivide.h

            # Update other files
            $file="./library.properties"
            $regex = 'version=(\d+\.\d+(\.\d+)?)'
            (Get-Content $file) -replace $regex, "version=$new_version" | Set-Content $file

            $file="./CMakeLists.txt"
            $regex = "set\(LIBDIVIDE_VERSION ""\d+\.\d+(\.\d+)?""\)"
            (Get-Content $file) -replace $regex, "set(LIBDIVIDE_VERSION ""$new_version"")" | Set-Content $file

            Write-Output "previous_version=$current_version" >> $Env:GITHUB_OUTPUT
            Write-Output "version=$new_version" >> $Env:GITHUB_OUTPUT
            Write-Output "major=$major_ver" >> $Env:GITHUB_OUTPUT
            Write-Output "minor=$minor_ver" >> $Env:GITHUB_OUTPUT
            Write-Output "patch=$patch_ver" >> $Env:GITHUB_OUTPUT

        # Commit all changed files back to the repository
        - name: Commit updated versions
          uses: stefanzweifel/git-auto-commit-action@v5
          with:
            commit_message: Auto increment version to ${{ steps.bump_version.outputs.version }}

        # Create draft release
        - name: Create draft release
          id: create-draft-release
          uses: softprops/action-gh-release@v2
          with:
            name: v${{ steps.bump_version.outputs.version }}
            draft: true
            generate_release_notes: true
            tag_name: v${{ steps.bump_version.outputs.version }}

        - name: Generate Summary
          run: |
            echo "Created [v${{ steps.bump_version.outputs.version }} draft release](${{ steps.create-draft-release.outputs.url }})" >> $GITHUB_STEP_SUMMARY