release.yml

name: Release

on:
  push:
    tags:
      - "v*"
  workflow_dispatch:
    inputs:
      tag:
        description: "Tag to release (e.g. v0.5.0)"
        required: true

env:
  CARGO_TERM_COLOR: always
  BINARY_NAME: diffmind

jobs:
  # ─── Build cross-platform binaries ─────────────────────────────────────────
  build:
    name: Build ${{ matrix.target }}
    runs-on: ${{ matrix.runner }}
    if: github.repository_owner == 'thinkgrid-labs'
    strategy:
      fail-fast: false
      matrix:
        include:
          - target: x86_64-unknown-linux-gnu
            runner: ubuntu-latest
            archive: tar.gz
            cross: false

          - target: aarch64-unknown-linux-gnu
            runner: ubuntu-latest
            archive: tar.gz
            cross: true

          - target: x86_64-apple-darwin
            runner: macos-latest
            archive: tar.gz
            cross: false

          - target: aarch64-apple-darwin
            runner: macos-latest
            archive: tar.gz
            cross: false

          - target: x86_64-pc-windows-msvc
            runner: windows-latest
            archive: zip
            cross: false

    steps:
      - uses: actions/checkout@v4

      - name: Install Rust (stable)
        uses: dtolnay/rust-toolchain@stable
        with:
          targets: ${{ matrix.target }}

      - name: Install cross (aarch64-linux)
        if: matrix.cross == true
        uses: taiki-e/install-action@v2
        with:
          tool: cross

      - name: Cache
        uses: Swatinem/rust-cache@v2
        with:
          key: release-${{ matrix.target }}

      - name: Build (native)
        if: matrix.cross == false
        run: cargo build --release --target ${{ matrix.target }}

      - name: Build (cross)
        if: matrix.cross == true
        run: cross build --release --target ${{ matrix.target }}

      # ── Package ──────────────────────────────────────────────────────────
      - name: Package (tar.gz — Unix)
        if: matrix.archive == 'tar.gz'
        shell: bash
        run: |
          ASSET="${{ env.BINARY_NAME }}-${{ matrix.target }}"
          mkdir -p dist
          cp target/${{ matrix.target }}/release/${{ env.BINARY_NAME }} dist/
          cp README.md LICENSE dist/
          tar -czf "${ASSET}.tar.gz" -C dist .
          echo "ASSET=${ASSET}.tar.gz" >> $GITHUB_ENV

      - name: Package (zip — Windows)
        if: matrix.archive == 'zip'
        shell: pwsh
        run: |
          $asset = "${{ env.BINARY_NAME }}-${{ matrix.target }}"
          New-Item -ItemType Directory -Force dist | Out-Null
          Copy-Item "target\${{ matrix.target }}\release\${{ env.BINARY_NAME }}.exe" dist\
          Copy-Item README.md dist\
          Copy-Item LICENSE dist\
          Compress-Archive -Path dist\* -DestinationPath "${asset}.zip"
          "ASSET=${asset}.zip" | Out-File -FilePath $env:GITHUB_ENV -Append

      - name: Upload artifact
        uses: actions/upload-artifact@v4
        with:
          name: ${{ env.BINARY_NAME }}-${{ matrix.target }}
          path: ${{ env.ASSET }}
          retention-days: 1

  # ─── Create GitHub Release ─────────────────────────────────────────────────
  release:
    name: Publish GitHub Release
    runs-on: ubuntu-latest
    needs: build
    if: github.repository_owner == 'thinkgrid-labs'
    permissions:
      contents: write

    steps:
      - uses: actions/checkout@v4

      - name: Download all artifacts
        uses: actions/download-artifact@v4
        with:
          path: artifacts
          merge-multiple: true

      - name: Copy install script to artifacts
        run: cp install.sh artifacts/install.sh

      - name: Generate checksums (SHA-256)
        run: |
          cd artifacts
          sha256sum * > checksums.txt
          cat checksums.txt

      - name: Extract release notes from tag
        id: notes
        run: |
          TAG="${{ github.ref_name }}"
          echo "tag=${TAG}" >> $GITHUB_OUTPUT

      - name: Create GitHub Release
        uses: softprops/action-gh-release@v2
        with:
          name: diffmind ${{ steps.notes.outputs.tag }}
          tag_name: ${{ steps.notes.outputs.tag }}
          draft: false
          prerelease: ${{ contains(steps.notes.outputs.tag, '-') }}
          generate_release_notes: true
          files: |
            artifacts/*
          body: |
            ## Installation

            Download the binary for your platform below, then:

            **Linux / macOS**
            ```bash
            tar -xzf diffmind-<target>.tar.gz
            sudo mv diffmind /usr/local/bin/
            diffmind download   # one-time model setup
            ```

            **Windows**
            Extract the `.zip`, place `diffmind.exe` somewhere on your `PATH`, then run:
            ```powershell
            diffmind download
            ```

            **Build from source**
            ```bash
            cargo install diffmind
            ```

            ## SHA-256 checksums

            See `checksums.txt` in the release assets.
        env:
          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}