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+---
+title: 🐪 OCaml on GitHub
+tags:
+    - ocaml
+    - github
+author: alex-hedley
+description: Using OCaml in GitHub with Actions/Workflows etc.
+published: 2023-10-12
+# image: /posts/images/
+# imageattribution: 
+---
+
+<!-- # 🐪 OCaml on GitHub -->
+
+In this article I'll show you how to setup and configure GitHub Actions to work with an OCaml Library.
+
+Rob Anderson [@jamsidedown](https://github.com/jamsidedown/) ([Site](https://robanderson.dev/)) decided he's going to be doing ⭐️ [AoC](https://adventofcode.com) this year in [OCaml](https://ocaml.org)! They wrote a new library [ocaml-cll](https://github.com/jamsidedown/ocaml-cll) an OCaml circular linked list library, in preperation for this as it's been needed in other languages for previous questions.
+
+To help out we looked at how to build the package using [GitHub Actions](https://github.com/features/actions).
+
+See the example here: ocaml-example [main.yml](https://github.com/alex-hedley/ocaml-example/blob/main/.github/workflows/main.yml)
+
+Or the production one: ocaml-cll [main.yml](https://github.com/jamsidedown/ocaml-cll/blob/main/.github/workflows/main.yml)
+
+Firstly as with most builds you setup your env with the language you need:
+
+- [setup-ocaml](https://github.com/ocaml/setup-ocaml)
+
+Another useful action is [actions-ocaml](https://github.com/RedPRL/actions-ocaml).
+
+```yml
+- name: 🐪 Set-up OCaml
+  uses: ocaml/setup-ocaml@v2
+  with:
+    ocaml-compiler: "5.0"
+    dune-cache: true
+```
+
+Once configured you need to install any dependencies from your `.opam`/`dune-project` file.
+
+```yml
+- name: ⬇️ Install opam deps
+  run: opam install . --deps-only --with-test
+```
+
+It's worth installing any global packages you need like `odoc` etc.
+
+```yml
+- name: ⬇️ Install opam global deps
+  run: opam install odoc ocamlformat dune-release
+```
+
+Next **build** your project:
+
+```yml
+- name: 🔨 Build
+  run: opam exec -- dune build
+```
+
+And **test**:
+
+```yml
+- name: 🧪 Test
+  run: opam exec -- dune runtest
+```
+
+Or with **coverage**:
+
+```yml
+- name: 🧪 Test and Coverage
+  run: "opam exec -- dune runtest --instrument-with bisect_ppx --force"
+- name: 📄 Coverage Report"
+  run: "opam exec -- bisect-ppx-report summary"
+```
+
+You can then build the **docs**:
+
+```yml
+- name: 📄 Build Docs
+  run: opam exec -- dune build @doc
+```
+
+Then decide if you want to upload that as an artifact and deploy it to either [GitHub Pages](https://pages.github.com) or another service.
+
+Once you have a package you can add it to the opam-repository, example PRs here:
+
+- https://github.com/ocaml/opam-repository/pull/24626
+- https://github.com/ocaml/opam-repository/pull/24719
+- https://github.com/ocaml/opam-repository/pull/24777
+
+---
+
+Complete:
+
+```yml
+jobs:
+  build:
+    runs-on: ubuntu-latest
+
+    defaults:
+      run:
+        working-directory: src/helloworld
+
+    steps:
+      - name: 🛎️ Checkout
+        uses: actions/checkout@v4
+
+      - name: 🐪 Set-up OCaml
+        uses: ocaml/setup-ocaml@v2
+        with:
+          ocaml-compiler: "5.0"
+          dune-cache: true
+
+      - name: ⬇️ Install opam deps
+        run: opam install . --deps-only --with-test
+
+      - name: ⬇️ Install opam global deps
+        run: opam install odoc ocamlformat dune-release
+
+      - name: 🔨 Build
+        run: opam exec -- dune build
+
+      - name: 🧪 Test
+        run: opam exec -- dune runtest
+
+      - name: 📄 Build Docs
+        run: opam exec -- dune build @doc
+      
+      - name: Upload API Docs artifact
+        uses: actions/upload-artifact@v3.1.3
+        with:
+          name: docs
+          path: ./src/helloworld/_build/default/_doc/_html
+
+      - name: Deploy API Docs
+        uses: peaceiris/actions-gh-pages@v3
+        with:
+          github_token: ${{ secrets.GITHUB_TOKEN }}
+          user_name: 'github-actions[bot]'
+          user_email: 'github-actions[bot]@users.noreply.github.com'
+          publish_dir: ./src/helloworld/_build/default/_doc/_html
+          destination_dir: docs
+          enable_jekyll: true
+```
+
+## ocaml-cll
+
+- Documentation https://robanderson.dev/ocaml-cll/cll/
+- Package https://opam.ocaml.org/packages/cll/
+
+## Links
+
+- https://github.com/alex-hedley/ocaml-example
+- https://github.com/jamsidedown/ocaml-cll