use prebuilt docker images for CI

.github/workflows/format.yml

@@ -9,20 +9,9 @@ on:
 jobs:
   format:
     name: format
-    strategy:
-      matrix:
-        ocaml-compiler:
-            - '5.3'
-    runs-on: 'ubuntu-latest'
+    runs-on: ubuntu-latest
+    container: ghcr.io/c-cube/c-cube-commmon/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
-
-      - run: opam install ocamlformat.0.27.0
+      - uses: actions/checkout@v6
       - run: opam exec -- make format-check
-

.github/workflows/gh-pages.yml

@@ -3,20 +3,16 @@ name: github pages
 on:
   push:
     branches:
-      - master  # Set a branch name to trigger deployment
+      - main
 
 jobs:
   deploy:
     name: Deploy doc
     runs-on: ubuntu-latest
-    steps:
-      - uses: actions/checkout@main
+    container: ghcr.io/c-cube/c-cube-commmon/ci-5.4:latest
 
-      - name: Use OCaml
-        uses: ocaml/setup-ocaml@v3
-        with:
-          ocaml-compiler: '5.2'
-          dune-cache: false
+    steps:
+      - uses: actions/checkout@v6
 
       - name: Deps
         run: opam install odig containers containers-data

.github/workflows/main.yml

@@ -7,58 +7,25 @@ on:
   pull_request:
 
 jobs:
-  run:
+  build:
     name: build
     timeout-minutes: 15
     strategy:
-      fail-fast: true
+      fail-fast: false
       matrix:
-        os:
-            - ubuntu-latest
-        ocaml-compiler:
-            - '4.08'
-            - '4.10'
-            - '4.14'
-            - '5.3'
-            - 'ocaml-variants.5.0.0+options,ocaml-option-bytecode-only'
+        include:
+          - ocaml-version: "4.08"
+            container: ghcr.io/c-cube/c-cube-commmon/ci-4.08:latest
+          - ocaml-version: "4.14"
+            container: ghcr.io/c-cube/c-cube-commmon/ci-4.14:latest
+          - ocaml-version: "5.4"
+            container: ghcr.io/c-cube/c-cube-commmon/ci-5.4:latest
+
+    runs-on: ubuntu-latest
+    container: ${{ matrix.container }}
 
-    runs-on: ${{ matrix.os }}
     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@v6
       - run: opam install -t containers containers-data --deps-only
       - run: opam exec -- dune build '@install'
       - run: opam exec -- dune runtest --force --profile=release
-
-  compat:
-    name: build
-    timeout-minutes: 15
-    strategy:
-      fail-fast: true
-      matrix:
-        os:
-            - macos-latest
-            - ubuntu-latest
-              #- windows-latest
-        ocaml-compiler:
-            - '5.1'
-
-    runs-on: ${{ matrix.os }}
-    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
-      - run: |
-          opam install -t containers --deps-only ;
-          opam install containers-data --deps-only  # no test deps
-      - run: opam exec -- dune build '@install'
-      - run: opam exec -- dune runtest -j 1 -p containers --profile=release # test only core on non-ubuntu platform