ci: onboard ci

.github/workflows/ci.yml

@@ -0,0 +1,103 @@
+name: CI
+
+env:
+  _NVIM_REPO: neovim/neovim
+  _PLENARY_REPO: nvim-lua/plenary.nvim
+  _ARCHIVE_URL: https://github.com/${repo:?}/archive/refs/tags/${tag:?}.tar.gz
+  PLENARY: ~/plenary
+
+on:
+  push:
+  pull_request:
+
+defaults:
+  run:
+    shell: bash
+
+jobs:
+  # - name: Setup Vim
+  # You may pin to the exact commit or the version.
+  # uses: rhysd/action-setup-vim@015df8c5b8dabdca7febe31bb66c156c0d780374
+  # uses: rhysd/[email protected]
+  # with:
+  #   version: stable
+  #   neovim: true
+
+  test:
+    runs-on: ubuntu-latest
+    steps:
+      - run: printf %s=%s\\n HOME ~ >> "${GITHUB_ENV:?}"
+
+      - name: Get latest dependency versions
+        env:
+          GH_TOKEN: ${{ github.token }}
+        run: |
+          _LATEST_NVIM_RELEASE_ID="$(gh release view stable -R "${_NVIM_REPO:?}" --json id -q .id)"
+
+          _LATEST_PLENARY_TAG="$(
+            gh api \
+                -H "Accept: application/vnd.github+json" \
+                -H "X-GitHub-Api-Version: 2022-11-28" \
+                "/repos/${_PLENARY_REPO:?}/tags" \
+                -q '.[].name' \
+                    | grep -E '^[Vv][[:digit:].]+$' \
+                    | sort -V \
+                    | tail -n 1
+          )"
+
+          echo "_LATEST_PLENARY_TAG=${_LATEST_PLENARY_TAG:?}" >> "${GITHUB_ENV:?}"
+          echo "_LATEST_NVIM_RELEASE_ID=${_LATEST_NVIM_RELEASE_ID:?}" >> "${GITHUB_ENV:?}"
+
+      - name: Restore cache
+        id: restore-cache
+        uses: actions/cache/restore@v3
+        with:
+          path: |
+            ${{ env.HOME }}/nvim
+            ${{ env.HOME }}/plenary
+          key: ${{ runner.os }}-deps-nvim@${{ env._LATEST_NVIM_RELEASE_ID }}-plenary@${{ env._LATEST_PLENARY_TAG }}
+
+      - if: ${{ !steps.restore-cache.outputs.cache-hit }}
+        name: Download nvim
+        working-directory: ${{ env.HOME }}
+        env:
+          GH_TOKEN: ${{ github.token }}
+        run: |
+          gh release download stable -R "${_NVIM_REPO:?}" -p nvim.appimage
+          chmod u+x nvim.appimage
+          ./nvim.appimage --appimage-extract
+          rm nvim.appimage
+          mv squashfs-root nvim
+
+      - if: ${{ !steps.restore-cache.outputs.cache-hit }}
+        name: Download plenary
+        working-directory: ${{ env.HOME }}
+        env:
+          GITHUB_TOKEN:
+          GH_TOKEN:
+        run: |
+          repo="${_PLENARY_REPO:?}"
+          tag="${_LATEST_PLENARY_TAG:?}"
+          url="$(cat <<EOF
+          ${{ env._ARCHIVE_URL }}
+          EOF
+          )"
+          curl -L "${url:?}" | tar xzf -
+          mv *plenary* plenary
+
+      - if: ${{ !steps.restore-cache.outputs.cache-hit }}
+        name: Cache deps
+        uses: actions/cache/save@v3
+        with:
+          path: |
+            ${{ env.HOME }}/nvim
+            ${{ env.HOME }}/plenary
+          key: ${{ steps.restore-cache.outputs.cache-primary-key }}
+
+      - uses: actions/checkout@v3
+
+      - name: Add nvim to PATH
+        run: echo ~/nvim/usr/bin >> "${GITHUB_PATH:?}"
+
+      - name: Test
+        run: make test