[do not merge] check

.Rbuildignore

@@ -12,7 +12,6 @@ Makefile
 test.R
 ^.*\.Rproj$
 ^\.Rproj\.user$
-\.drone\.jsonnet
 WORDLIST
-\.drone\.yml
+^\.github$
 temp

.github/workflows/main.yaml

@@ -0,0 +1,74 @@
+name: CI
+on:
+  push:
+    branches:
+      - 'main'
+      - 'scratch/**'
+    tags:
+      - '[0-9]+.[0-9]+.[0-9]+'
+      - '[0-9]+.[0-9]+.[0-9]+.[0-9]+'
+  pull_request:
+
+jobs:
+  check:
+    runs-on: ${{ matrix.config.os }}
+    name: ${{ matrix.config.os }} (${{ matrix.config.r }})
+    strategy:
+      fail-fast: false
+      matrix:
+        config:
+          - os: ubuntu-20.04
+            r: 3.6.3
+          - os: ubuntu-20.04
+            r: 4.0.5
+          - os: ubuntu-20.04
+            r: 4.1.3
+          - os: ubuntu-20.04
+            r: 4.2.3
+          - os: ubuntu-20.04
+            r: 4.3.1
+          - os: ubuntu-latest
+            r: release
+    env:
+      R_KEEP_PKG_SOURCE: yes
+    steps:
+      - uses: actions/checkout@v4
+      - uses: r-lib/actions/setup-r@v2
+        with:
+          r-version: ${{ matrix.config.r }}
+          use-public-rspm: true
+        env:
+          RSPM: ${{ matrix.config.rspm }}
+      - name: Set Matrix source
+        if: matrix.config.r != 'release'
+        shell: bash
+        run: |
+          echo 'MATRIX_PKG=url::https://mpn.metworx.com/snapshots/stable/2024-09-23/src/contrib/Matrix_1.6-5.tar.gz' >>$GITHUB_ENV
+      - uses: r-lib/actions/setup-r-dependencies@v2
+        with:
+          extra-packages: |
+            any::rcmdcheck
+            ${{ env.MATRIX_PKG }}
+          upgrade: ${{ matrix.config.r == 'release' && 'TRUE' || 'FALSE' }}
+      - uses: r-lib/actions/check-r-package@v2
+  release:
+    if: github.ref_type == 'tag'
+    name: Upload release
+    needs: check
+    runs-on: ubuntu-latest
+    permissions:
+      id-token: write
+      contents: read
+    steps:
+      - uses: actions/checkout@v4
+      - uses: metrumresearchgroup/actions/mpn-latest@v1
+      - uses: r-lib/actions/setup-r@v2
+        with:
+          r-version: release
+          use-public-rspm: true
+          # For pkgpub.
+          extra-repositories: 'https://mpn.metworx.com/snapshots/stable/${{ env.MPN_LATEST }}'
+      - uses: r-lib/actions/setup-r-dependencies@v2
+        with:
+          extra-packages: any::pkgpub
+      - uses: metrumresearchgroup/actions/publish-r-release@v1