server-ci.yml

name: CN Server CI

on:
  push:
    branches:
      - main
  pull_request:
    branches:
      - main

# Cancel in-progress job when a new push is performed
concurrency:
  group: ci-${{ github.workflow }}-${{ github.ref }}
  cancel-in-progress: true

jobs:
  build:
    strategy:
      matrix:
        ocaml-version: [4.14.1]
        os: [ubuntu-22.04]

    runs-on: ${{ matrix.os }}

    steps:
      - name: Check out repository
        uses: actions/checkout@v4

      - name: Set up OCaml
        uses: ocaml/setup-ocaml@v3
        with:
          ocaml-compiler: ${{ matrix.ocaml-version }}

      - name: Link lockfile
        working-directory: cn-lsp/server
        run: ln -s cnlsp.opam.locked-${{ matrix.ocaml-version }} cnlsp.opam.locked

      - name: Restore `_opam`
        id: cache-opam-restore
        uses: actions/cache/restore@v4
        with:
          path: cn-lsp/server/_opam
          key: ${{ matrix.ocaml-version }}-${{ hashFiles('cn-lsp/server/cnlsp.opam.locked') }}

      - name: Install server dependencies
        working-directory: cn-lsp/server
        # `opam switch show ||` allows this operation to succeed trivially if
        # opam believes the switch already exists, which it will if it sees our
        # restored `_opam` on disk
        run: opam switch show || opam switch create . ocaml.${{ matrix.ocaml-version }} --deps-only --locked -y

      - name: Cache `_opam`
        if: steps.cache-opam-restore.outputs.cache-hit != 'true'
        uses: actions/cache/save@v4
        with:
          path: cn-lsp/server/_opam
          key: ${{ steps.cache-opam-restore.outputs.cache-primary-key }}

      - name: Build server
        working-directory: cn-lsp/server
        run: eval $(opam env) && dune build

      - name: Run server tests
        working-directory: cn-lsp/server
        run: eval $(opam env) && dune test

      - name: Install server
        # if: ${{ github.event_name == 'push' && github.ref_name == 'main' }}
        working-directory: cn-lsp/server
        run: opam install . -y

      - name: Upload server binary
        # if: ${{ github.event_name == 'push' && github.ref_name == 'main' }}
        uses: actions/upload-artifact@v4
        with:
          name: cn-lsp-server-${{ matrix.os }}
          path: cn-lsp/server/_opam/bin/cn-lsp-server

      - name: Upload Cerberus runtime
        # if: ${{ github.event_name == 'push' && github.ref_name == 'main' }}
        uses: actions/upload-artifact@v4
        with:
          name: cerberus-runtime
          path: cn-lsp/server/_opam/lib/cerberus/runtime