release.yml

name: Release Build

on:
  pull_request:
    types: [closed]
    branches:
      - main

permissions:
  contents: write

jobs:
  prepare:
    name: Prepare release (check files, version, notes)
    runs-on: windows-latest
    outputs:
      should_release: ${{ steps.check_files.outputs.should_release }}
      version: ${{ steps.next_version.outputs.version }}
      version_number: ${{ steps.next_version.outputs.version_number }}
      notes: ${{ steps.parse_commit.outputs.notes }}
    steps:
      - uses: actions/checkout@v4
        with:
          fetch-depth: 0

      - name: Check if source files changed
        id: check_files
        shell: pwsh
        run: |
          $changedFiles = git diff --name-only ${{ github.event.pull_request.base.sha }} ${{ github.event.pull_request.head.sha }}
          Write-Output "Changed files:"
          Write-Output $changedFiles

          $sourceChanged = $false
          foreach ($file in $changedFiles) {
            if ($file -match '\.(cpp|h|hpp|c|cc|cxx)$') {
              $sourceChanged = $true
              Write-Output "Source file changed: $file"
              break
            }
          }

          if ($sourceChanged) {
            Write-Output "should_release=true" >> $env:GITHUB_OUTPUT
            Write-Output "Source files changed - will proceed with release"
          } else {
            Write-Output "should_release=false" >> $env:GITHUB_OUTPUT
            Write-Output "No source files changed - skipping release"
          }

      - name: Get latest release tag
        if: steps.check_files.outputs.should_release == 'true'
        id: get_latest_tag
        shell: pwsh
        env:
          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
        run: |
          $repo = "${{ github.repository }}"
          $headers = @{"Authorization" = "token $env:GITHUB_TOKEN"; "Accept" = "application/vnd.github.v3+json"}

          # Try GitHub Releases API first (includes prereleases)
          try {
            $releases = Invoke-RestMethod -Uri "https://api.github.com/repos/$repo/releases?per_page=100" -Headers $headers -UseBasicParsing
          } catch {
            $releases = @()
          }

          $candidates = @()
          foreach ($r in $releases) {
            if ($r.tag_name -match 'v?(\d+)\.(\d+)\.(\d+)') {
              $candidates += [PSCustomObject]@{ Tag = $r.tag_name; Major = [int]$Matches[1]; Minor = [int]$Matches[2]; Patch = [int]$Matches[3] }
            }
          }

          if ($candidates.Count -gt 0) {
            $sorted = $candidates | Sort-Object -Property @{Expression={$_.Major};Descending=$true}, @{Expression={$_.Minor};Descending=$true}, @{Expression={$_.Patch};Descending=$true}
            $latestTag = $sorted[0].Tag
            Write-Output "latest_tag=$latestTag" >> $env:GITHUB_OUTPUT
            exit 0
          }

          # Fallback: ensure tags are fetched and inspect local tags
          git fetch --tags --prune || true
          $local = git tag -l "v[0-9]*.[0-9]*.[0-9]*"
          if ($local) {
            $sortedTags = $local | ForEach-Object {
              if ($_ -match 'v?(\d+)\.(\d+)\.(\d+)') {
                [PSCustomObject]@{ Tag = $_; Major = [int]$Matches[1]; Minor = [int]$Matches[2]; Patch = [int]$Matches[3] }
              }
            } | Sort-Object -Property @{Expression={$_.Major};Descending=$true}, @{Expression={$_.Minor};Descending=$true}, @{Expression={$_.Patch};Descending=$true}
            if ($sortedTags.Count -gt 0) {
              $latestTag = $sortedTags[0].Tag
              Write-Output "latest_tag=$latestTag" >> $env:GITHUB_OUTPUT
            } else {
              Write-Output "latest_tag=v0.0.0" >> $env:GITHUB_OUTPUT
            }
          } else {
            Write-Output "latest_tag=v0.0.0" >> $env:GITHUB_OUTPUT
          }

      - name: Determine next version
        if: steps.check_files.outputs.should_release == 'true'
        id: next_version
        shell: pwsh
        run: |
          $latestTag = "${{ steps.get_latest_tag.outputs.latest_tag }}"
          if ($latestTag -match 'v?(\d+)\.(\d+)\.(\d+)') {
            $major = [int]$Matches[1]
            $minor = [int]$Matches[2]
            $patch = [int]$Matches[3]
            $patch = $patch + 1
            $newVersion = "v$major.$minor.$patch"
            Write-Output "version=$newVersion" >> $env:GITHUB_OUTPUT
            Write-Output "version_number=$major.$minor.$patch" >> $env:GITHUB_OUTPUT
          } else {
            Write-Error "Could not parse version from tag: $latestTag"
            exit 1
          }

      - name: Parse commit message for release notes
        if: steps.check_files.outputs.should_release == 'true'
        id: parse_commit
        shell: pwsh
        run: |
          $commitMsg = git log -1 --pretty=%B
          $commitSubject = $commitMsg.Split("`n")[0]
          $commitBodyLines = $commitMsg.Split("`n") | Select-Object -Skip 1
          $commitBody = ($commitBodyLines -join "`n").Trim()

          $releaseNotes = "## Changes`n`n"

          if ($commitSubject -match '^(fix|feat|docs|style|refactor|test|chore|perf|ci|build|revert)(\(.+\))?:\s*(.+)$') {
            $type = $Matches[1]
            $description = $Matches[3]
            $typeLabel = switch ($type) {
              'fix' { '🐛 Fix' }
              'feat' { '✨ Feature' }
              'refactor' { '♻️ Refactor' }
              'test' { '✅ Test' }
              'chore' { '🔧 Chore' }
              'perf' { '⚡ Performance' }
              'build' { '📦 Build' }
              'revert' { '⏪ Revert' }
              default { '📝 Update' }
            }
            $releaseNotes += "**$typeLabel**: $description`n"
          } else {
            $releaseNotes += "$commitSubject`n"
          }

          if ($commitBody -ne "") {
            $maxBodyLength = 1000
            if ($commitBody.Length -gt $maxBodyLength) {
              $commitBody = $commitBody.Substring(0, $maxBodyLength) + "..."
            }
            $releaseNotes += "`n$commitBody`n"
          }

          $commitSha = git rev-parse --short HEAD
          $releaseNotes += "`n---`n*Commit: $commitSha*"

          $delimiter = "EOF_$(Get-Random)"
          Write-Output "notes<<$delimiter" >> $env:GITHUB_OUTPUT
          Write-Output $releaseNotes >> $env:GITHUB_OUTPUT
          Write-Output $delimiter >> $env:GITHUB_OUTPUT

  build:
    name: Build matrix for multiple Windows architectures
    needs: prepare
    if: needs.prepare.outputs.should_release == 'true'
    runs-on: windows-latest
    strategy:
      matrix:
        arch: [x64, x86, arm64]
        
    steps:
      - uses: actions/checkout@v4

      - name: Compile for ${{ matrix.arch }}
        shell: cmd
        run: |
          @echo off
          REM Find vcvarsall.bat dynamically
          for /f "usebackq tokens=*" %%i in (`"C:\Program Files (x86)\Microsoft Visual Studio\Installer\vswhere.exe" -latest -products * -requires Microsoft.VisualStudio.Component.VC.Tools.x86.x64 -property installationPath`) do (
            set "VS_PATH=%%i"
          )
          
          if not exist "%VS_PATH%\VC\Auxiliary\Build\vcvarsall.bat" (
            echo Error: vcvarsall.bat not found.
            exit /b 1
          )

          REM Map architecture for cross-compilation (host_target)
          REM GitHub Actions windows-latest runners are x64, so we need x64_<target> for cross-compilation
          set "TARGET_ARCH=${{ matrix.arch }}"
          set "VCVARS_ARCH=%TARGET_ARCH%"
          if "%TARGET_ARCH%"=="x86" set "VCVARS_ARCH=x64_x86"
          if "%TARGET_ARCH%"=="arm64" set "VCVARS_ARCH=x64_arm64"

          REM Initialize environment for the target architecture
          call "%VS_PATH%\VC\Auxiliary\Build\vcvarsall.bat" %VCVARS_ARCH%

          set outName=win-witr-${{ matrix.arch }}.exe
          echo Compiling %outName%...
          cl /O2 /Ot /GL /std:c++20 /EHsc main.cpp /DUNICODE /D_UNICODE /Fe:%outName%
          if errorlevel 1 exit /b 1

      - name: Upload build artifact for ${{ matrix.arch }}
        uses: actions/upload-artifact@v4
        with:
          name: win-witr-${{ matrix.arch }}
          path: win-witr-${{ matrix.arch }}.exe

  create-release:
    name: Create GitHub Release with all artifacts
    needs: build
    if: needs.prepare.outputs.should_release == 'true'
    runs-on: ubuntu-latest
    steps:
      - name: Download all build artifacts
        uses: actions/download-artifact@v4
        with:
          path: artifacts

      - name: List artifacts
        run: ls -R artifacts

      - name: Checkout repository for tagging
        uses: actions/checkout@v4
        with:
          fetch-depth: 0
          token: ${{ secrets.GITHUB_TOKEN }}

      - name: Ensure release tag exists and push
        if: needs.prepare.outputs.version != ''
        shell: bash
        run: |
          set -e
          TAG="${{ needs.prepare.outputs.version }}"
          echo "Preparing tag: $TAG"
          if [ -z "$TAG" ]; then
            echo "No tag provided; cannot create release"
            exit 1
          fi
          if git rev-parse "$TAG" >/dev/null 2>&1; then
            echo "Tag $TAG already exists locally"
          else
            git tag -a "$TAG" -m "Release $TAG"
            echo "Created local tag $TAG"
          fi

          # Push tag (skip errors if it already exists on remote)
          git push origin "$TAG" || echo "Tag push failed or already exists on remote"

      - name: Create Release and Upload Assets
        uses: softprops/action-gh-release@v2
        with:
          tag_name: ${{ needs.prepare.outputs.version }}
          name:  win-witr ${{ needs.prepare.outputs.version }}
          body: ${{ needs.prepare.outputs.notes }}
          files: artifacts/*/*.exe
          draft: false
          prerelease: true
        env:
          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}