ci: enable github actions

.github/dependabot.yml

@@ -0,0 +1,6 @@
+version: 2
+updates:
+  - package-ecosystem: github-actions
+    directory: /
+    schedule:
+      interval: monthly 

.github/workflows/build-test.yml

@@ -0,0 +1,40 @@
+name: Build and Test
+
+on:
+  - push
+  - pull_request
+
+jobs:
+  build-and-test:
+    strategy:
+      fail-fast: false
+      matrix:
+        os:
+          - macos-latest
+          - ubuntu-latest
+          # - windows-latest
+        ocaml-version:
+          - 4.14
+          - 5.1
+
+    runs-on: ${{ matrix.os }}
+
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v4
+
+      - name: Use OCaml ${{ matrix.ocaml-version }}
+        uses: ocaml/setup-ocaml@v2
+        with:
+          ocaml-compiler: ${{ matrix.ocaml-version }}
+          dune-cache: true
+          opam-depext-flags: "--with-test"
+          allow-prerelease-opam: true
+
+      - run: opam install . --deps-only --with-test
+
+      - name: build project
+        run: opam exec -- dune build
+
+      - name: run test
+        run: opam exec -- dune runtest

.github/workflows/deploy-doc.yml

@@ -0,0 +1,57 @@
+name: Deploy odoc to GitHub Pages
+
+on:
+  push:
+    branches:
+      - main
+
+permissions: read-all
+
+concurrency:
+  group: deploy-odoc
+  cancel-in-progress: true
+
+jobs:
+  deploy-odoc:
+    name: Deploy odoc to GitHub Pages
+
+    environment:
+      name: github-pages
+      url: ${{ steps.deployment.outputs.page_url }}
+
+    permissions:
+      contents: read
+      id-token: write
+      pages: write
+
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout tree
+        uses: actions/checkout@v4
+
+      - name: Set-up OCaml
+        uses: ocaml/setup-ocaml@v2
+        with:
+          ocaml-compiler: "5.1"
+          dune-cache: true
+          opam-depext-flags: "--with-doc"
+          allow-prerelease-opam: true
+
+      - name: Install dependencies
+        run: opam install . --deps-only --with-doc
+
+      - name: Build documentation
+        run: opam exec -- dune build @doc
+
+      - name: Set-up Pages
+        uses: actions/configure-pages@v4
+
+      - name: Upload artifact
+        uses: actions/upload-pages-artifact@v3
+        with:
+          path: _build/default/_doc/_html
+
+      - name: Deploy odoc to GitHub Pages
+        id: deployment
+        uses: actions/deploy-pages@v4

.github/workflows/lint.yml

@@ -0,0 +1,57 @@
+name: Lint
+
+on:
+  - push
+  - pull_request
+
+jobs:
+  lint-fmt:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v4
+
+      - name: Use OCaml 5.1
+        uses: ocaml/setup-ocaml@v2
+        with:
+          ocaml-compiler: 5.1
+          dune-cache: true
+          opam-depext-flags: "--with-doc"
+          allow-prerelease-opam: true
+
+      - name: Lint fmt
+        uses: ocaml/setup-ocaml/lint-fmt@v2
+
+  lint-opam:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v4
+
+      - name: Use OCaml 5.1
+        uses: ocaml/setup-ocaml@v2
+        with:
+          ocaml-compiler: 5.1
+          dune-cache: true
+          opam-depext-flags: "--with-doc"
+          allow-prerelease-opam: true
+
+      - name: Lint opam
+        uses: ocaml/setup-ocaml/lint-opam@v2
+
+  lint-doc:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v4
+
+      - name: Use OCaml 5.1
+        uses: ocaml/setup-ocaml@v2
+        with:
+          ocaml-compiler: 5.1
+          dune-cache: true
+          opam-depext-flags: "--with-doc"
+          allow-prerelease-opam: true
+
+      - name: Lint doc
+        uses: ocaml/setup-ocaml/lint-doc@v2

.github/workflows/opam-dependency-submission.yml

@@ -0,0 +1,22 @@
+name: Opam Dependency Submission
+
+on:
+  - push
+  - pull_request
+
+jobs:
+  opam-dependency-submission:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout tree
+        uses: actions/checkout@v4
+
+      - name: Set-up OCaml 5.1
+        uses: ocaml/setup-ocaml@v2
+        with:
+          ocaml-compiler: 5.1
+          dune-cache: true
+          allow-prerelease-opam: true
+
+      - name: Opam Dependency Submission
+        uses: ocaml/setup-ocaml/analysis@v2

argon2.opam

@@ -19,6 +19,11 @@ build: [
   ["dune" "subst"] {dev}
   ["dune" "build" "-p" name "-j" jobs "@install" "@doc" {with-doc}]
 ]
+depexts: [
+  ["libargon2-dev"] {os-family = "debian"}
+  ["libargon2-dev"] {os-family = "ubuntu"}
+  ["libargon2-devel"] {os-distribution = "fedora"}
+]
 synopsis: "OCaml bindings to Argon2"
 description: """
 Based on argon2 library as described in https://github.com/P-H-C/phc-winner-argon2.