use docker images for CI

.github/workflows/format.yml

@@ -1,5 +1,3 @@
-
-
 name: format
 
 on:
@@ -11,20 +9,10 @@ on:
 jobs:
   format:
     name: format
-    strategy:
-      matrix:
-        ocaml-compiler:
-            - '5.3'
-    runs-on: 'ubuntu-latest'
+    runs-on: ubuntu-latest
+    container: ghcr.io/ocaml-tracing/ocaml-opentelemetry/ci-4.14:latest
+
     steps:
-      - uses: actions/checkout@main
-      - name: Use OCaml ${{ matrix.ocaml-compiler }}
-        uses: ocaml/setup-ocaml@v3
-        with:
-          ocaml-compiler: ${{ matrix.ocaml-compiler }}
-          dune-cache: true
-          allow-prerelease-opam: true
+      - uses: actions/checkout@v4
 
-      - run: opam install ocamlformat.0.27.0 lwt.6.1.1
       - run: opam exec -- make format-check
-

.github/workflows/gh-pages.yml

@@ -8,27 +8,23 @@ on:
 jobs:
   deploy:
     runs-on: ubuntu-latest
+    container: ghcr.io/ocaml-tracing/ocaml-opentelemetry/ci-5.4:latest
+
     steps:
-      - uses: actions/checkout@main
-
-      # needed for depext to work
-      - run: sudo apt-get update && sudo apt-get install mccs
-
-      - uses: ocaml/setup-ocaml@v3
+      - uses: actions/checkout@v4
         with:
-          ocaml-compiler: '5.1.x'
-          dune-cache: true
-          allow-prerelease-opam: true
+          submodules: recursive
 
-      - run: |
-          opam pin trace https://github.com/ocaml-tracing/ocaml-trace.git#main -y -n
-          opam pin https://github.com/ocaml-tracing/ambient-context.git#main -y -n
+      - name: Install local packages
+        run: opam exec -- dune build @install && opam exec -- dune install
 
-      - name: Deps
-        run: opam install odig opentelemetry opentelemetry-client opentelemetry-lwt opentelemetry-cohttp opentelemetry-client-ocurl opentelemetry-client-ocurl-lwt opentelemetry-cohttp-lwt opentelemetry-cohttp-eio
-
-      - name: Build
-        run: opam exec -- odig odoc --cache-dir=_doc/ opentelemetry opentelemetry-client opentelemetry-lwt opentelemetry-cohttp opentelemetry-client-ocurl opentelemetry-client-ocurl-lwt opentelemetry-cohttp-lwt opentelemetry-cohttp-eio
+      - name: Build documentation
+        run: |
+          opam exec -- odig odoc --cache-dir=_doc/ \
+            opentelemetry opentelemetry-client opentelemetry-lwt \
+            opentelemetry-cohttp-lwt opentelemetry-client-ocurl \
+            opentelemetry-client-ocurl-lwt opentelemetry-client-cohttp-lwt \
+            opentelemetry-client-cohttp-eio opentelemetry-logs
 
       - name: Deploy
         uses: peaceiris/actions-gh-pages@v3

.github/workflows/main.yml

@@ -11,17 +11,19 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        os:
-          - ubuntu-latest
-            #- windows-latest
-            #- macos-latest
-        ocaml-compiler:
-          - 4.08.x
-          - 4.13.x
-          - 5.0.x
-          - 5.3.x
+        include:
+          - ocaml-version: "4.08"
+            container: ghcr.io/ocaml-tracing/ocaml-opentelemetry/ci-4.08:latest
+            eio: false
+          - ocaml-version: "4.14"
+            container: ghcr.io/ocaml-tracing/ocaml-opentelemetry/ci-4.14:latest
+            eio: false
+          - ocaml-version: "5.4"
+            container: ghcr.io/ocaml-tracing/ocaml-opentelemetry/ci-5.4:latest
+            eio: true
 
-    runs-on: ${{ matrix.os }}
+    runs-on: ubuntu-latest
+    container: ${{ matrix.container }}
 
     steps:
       - name: Checkout code
@@ -29,47 +31,18 @@ jobs:
         with:
           submodules: recursive
 
-      # needed for depext to work
-      - run: sudo apt-get update && sudo apt-get install mccs
-        if: ${{ matrix.os == 'ubuntu-latest' }}
+      - name: Build
+        run: opam exec -- dune build @install -p opentelemetry,opentelemetry-client,opentelemetry-lwt,opentelemetry-cohttp-lwt,opentelemetry-client-ocurl,opentelemetry-client-ocurl-lwt,opentelemetry-client-cohttp-lwt,opentelemetry-logs
 
-      - name: Use OCaml ${{ matrix.ocaml-compiler }}
-        uses: ocaml/setup-ocaml@v3
-        with:
-          ocaml-compiler: ${{ matrix.ocaml-compiler }}
-          opam-depext-flags: --with-test
-          dune-cache: true
-          allow-prerelease-opam: true
+      - name: Build eio packages
+        if: ${{ matrix.eio }}
+        run: opam exec -- dune build @install -p opentelemetry-client-cohttp-eio
 
-      - run: |
-          opam install pbrt.4.0 -y
-          opam install ambient-context lwt.5.9.2
+      - name: Lint (protoc check)
+        run: opam exec -- dune build @lint
 
-      # We cannot install packages that need eio on ocaml versions before 5
-      - run: |
-          packages=$(ls ./*.opam | grep -v eio)
-          opam install $packages --deps-only --with-test --solver=mccs
-        if: ${{ ! (startsWith(matrix.ocaml-compiler, '5')) }}
+      - name: Check no generated files changed
+        run: git diff --exit-code
 
-      # We should be able to install all packages on ocaml 5
-      - run: opam install . --deps-only --with-test --solver=mccs
-        if: ${{ startsWith(matrix.ocaml-compiler, '5') }}
-
-      - run: opam exec -- dune build @install -p opentelemetry,opentelemetry-client,opentelemetry-lwt,opentelemetry-client-ocurl,opentelemetry-cohttp-lwt,opentelemetry-client-cohttp-lwt,opentelemetry-logs
-
-      - run: opam install trace
-      - run: opam exec -- dune build @install -p opentelemetry
-
-      - run: opam install lwt.6.1.1 -y
-        if: ${{ matrix.ocaml-compiler == '5.3.x' }}
-      - run: opam exec -- dune build @install -p opentelemetry,opentelemetry-client,opentelemetry-lwt,opentelemetry-client-cohttp-lwt
-        if: ${{ matrix.ocaml-compiler == '5.3.x' }}
-
-      - run: opam install ocaml-protoc
-      - run: opam exec -- dune build @lint
-
-      # check that nothing changed
-      - run: git diff --exit-code
-
-      - run: opam exec -- dune build @runtest
-        if: ${{ matrix.os == 'ubuntu-latest' }}
+      - name: Run tests
+        run: opam exec -- dune build @runtest

.gitignore

@@ -7,3 +7,4 @@ _opam
 *.install
 *.exe
 *.tmp
+/.env

Makefile

@@ -36,6 +36,20 @@ WATCH ?= @all
 watch:
 	@dune build $(WATCH) -w $(OPTS)
 
+# --- CI Docker images ---
+CI_REGISTRY = ghcr.io/ocaml-tracing/ocaml-opentelemetry
+CI_VERSIONS = 4.08 4.14 5.4
+
+build-ci-docker:
+	@for v in $(CI_VERSIONS); do \
+		docker build -f deps/dockerfile.$$v -t $(CI_REGISTRY)/ci-$$v:latest . ; \
+	done
+
+upload-ci-docker: build-ci-docker
+	@for v in $(CI_VERSIONS); do \
+		docker push $(CI_REGISTRY)/ci-$$v:latest ; \
+	done || ( echo  "to login:  docker login ghcr.io -u <your-github-username>" ; exit 1 )
+
 VERSION=$(shell awk '/^version:/ {print $$2}' opentelemetry.opam)
 update_next_tag:
 	@echo "update version to $(VERSION)..."

deps/dockerfile.4.08

@@ -0,0 +1,33 @@
+FROM ocaml/opam:ubuntu-24.04-ocaml-4.08
+
+USER root
+RUN apt-get update && \
+    apt-get install -y --no-install-recommends \
+      pkg-config libcurl4-openssl-dev libgmp-dev mccs && \
+    rm -rf /var/lib/apt/lists/*
+USER opam
+
+RUN opam update
+
+WORKDIR /home/opam/src
+COPY --chown=opam:opam opentelemetry.opam .
+COPY --chown=opam:opam opentelemetry-client.opam .
+COPY --chown=opam:opam opentelemetry-lwt.opam .
+COPY --chown=opam:opam opentelemetry-cohttp-lwt.opam .
+COPY --chown=opam:opam opentelemetry-client-ocurl.opam .
+COPY --chown=opam:opam opentelemetry-client-ocurl-lwt.opam .
+COPY --chown=opam:opam opentelemetry-client-cohttp-lwt.opam .
+COPY --chown=opam:opam opentelemetry-logs.opam .
+
+RUN --mount=type=cache,target=/home/opam/.opam/download-cache,uid=1000,gid=1000 \
+    opam pin add -n opentelemetry . && \
+    opam pin add -n opentelemetry-client . && \
+    opam pin add -n opentelemetry-lwt . && \
+    opam pin add -n opentelemetry-cohttp-lwt . && \
+    opam pin add -n opentelemetry-client-ocurl . && \
+    opam pin add -n opentelemetry-client-ocurl-lwt . && \
+    opam pin add -n opentelemetry-client-cohttp-lwt . && \
+    opam pin add -n opentelemetry-logs . && \
+    opam install . --deps-only --with-test -y && \
+    opam install trace ocaml-protoc -y && \
+    opam clean -a -y

deps/dockerfile.4.14

@@ -0,0 +1,33 @@
+FROM ocaml/opam:ubuntu-24.04-ocaml-4.14
+
+USER root
+RUN apt-get update && \
+    apt-get install -y --no-install-recommends \
+      pkg-config libcurl4-openssl-dev libgmp-dev mccs && \
+    rm -rf /var/lib/apt/lists/*
+USER opam
+
+RUN opam update
+
+WORKDIR /home/opam/src
+COPY --chown=opam:opam opentelemetry.opam .
+COPY --chown=opam:opam opentelemetry-client.opam .
+COPY --chown=opam:opam opentelemetry-lwt.opam .
+COPY --chown=opam:opam opentelemetry-cohttp-lwt.opam .
+COPY --chown=opam:opam opentelemetry-client-ocurl.opam .
+COPY --chown=opam:opam opentelemetry-client-ocurl-lwt.opam .
+COPY --chown=opam:opam opentelemetry-client-cohttp-lwt.opam .
+COPY --chown=opam:opam opentelemetry-logs.opam .
+
+RUN --mount=type=cache,target=/home/opam/.opam/download-cache,uid=1000,gid=1000 \
+    opam pin add -n opentelemetry . && \
+    opam pin add -n opentelemetry-client . && \
+    opam pin add -n opentelemetry-lwt . && \
+    opam pin add -n opentelemetry-cohttp-lwt . && \
+    opam pin add -n opentelemetry-client-ocurl . && \
+    opam pin add -n opentelemetry-client-ocurl-lwt . && \
+    opam pin add -n opentelemetry-client-cohttp-lwt . && \
+    opam pin add -n opentelemetry-logs . && \
+    opam install . --deps-only --with-test -y && \
+    opam install trace ocaml-protoc ocamlformat.0.27.0 -y && \
+    opam clean -a -y

deps/dockerfile.5.4

@@ -0,0 +1,35 @@
+FROM ocaml/opam:ubuntu-24.04-ocaml-5.4
+
+USER root
+RUN apt-get update && \
+    apt-get install -y --no-install-recommends \
+      pkg-config libcurl4-openssl-dev libgmp-dev mccs && \
+    rm -rf /var/lib/apt/lists/*
+USER opam
+
+RUN opam update
+
+WORKDIR /home/opam/src
+COPY --chown=opam:opam opentelemetry.opam .
+COPY --chown=opam:opam opentelemetry-client.opam .
+COPY --chown=opam:opam opentelemetry-lwt.opam .
+COPY --chown=opam:opam opentelemetry-cohttp-lwt.opam .
+COPY --chown=opam:opam opentelemetry-client-ocurl.opam .
+COPY --chown=opam:opam opentelemetry-client-ocurl-lwt.opam .
+COPY --chown=opam:opam opentelemetry-client-cohttp-lwt.opam .
+COPY --chown=opam:opam opentelemetry-client-cohttp-eio.opam .
+COPY --chown=opam:opam opentelemetry-logs.opam .
+
+RUN --mount=type=cache,target=/home/opam/.opam/download-cache,uid=1000,gid=1000 \
+    opam pin add -n opentelemetry . && \
+    opam pin add -n opentelemetry-client . && \
+    opam pin add -n opentelemetry-lwt . && \
+    opam pin add -n opentelemetry-cohttp-lwt . && \
+    opam pin add -n opentelemetry-client-ocurl . && \
+    opam pin add -n opentelemetry-client-ocurl-lwt . && \
+    opam pin add -n opentelemetry-client-cohttp-lwt . && \
+    opam pin add -n opentelemetry-client-cohttp-eio . && \
+    opam pin add -n opentelemetry-logs . && \
+    opam install . --deps-only --with-test -y && \
+    opam install trace ocaml-protoc lwt.6.1.1 odig -y && \
+    opam clean -a -y