CI: use matrix for the OCaml version

Checking that the parsing works well using `gh extensions act -l`

Author: dannywillems

.github/workflows/ci.yaml

@@ -18,7 +18,6 @@ env:
   OPENMINA_PANIC_ON_BUG: true
   CARGO_INCREMENTAL: 1
   RUSTFLAGS: "-C overflow-checks=off -C debug-assertions=off"
-  OCAML_VERSION: "4.14.2"
 
 concurrency:
   group: ${{ github.workflow }}-${{ github.event.pull_request.number || github.ref }}
@@ -144,6 +143,7 @@ jobs:
       fail-fast: false # Allow other platforms to continue if one fails
       matrix:
         os: [ubuntu-22.04, ubuntu-24.04, ubuntu-24.04-arm, macos-latest]
+        ocaml_version: [4.14.2]
     runs-on: ${{ matrix.os }}
     steps:
       - name: Git checkout
@@ -155,7 +155,7 @@ jobs:
       - name: Use shared OCaml setting up steps
         uses: ./.github/actions/setup-ocaml
         with:
-          ocaml_version: ${{ OCAML_VERSION }}
+          ocaml_version: ${{ matrix.ocaml_version }}
 
       - name: Setup Rust
         uses: ./.github/actions/setup-rust
@@ -193,7 +193,7 @@ jobs:
       - name: Use shared OCaml setting up steps
         uses: ./.github/actions/setup-ocaml
         with:
-          ocaml_version: ${{ OCAML_VERSION }}
+          ocaml_version: ${{ matrix.ocaml_version }}
 
       - name: Setup WebAssembly environment
         uses: ./.github/actions/setup-wasm
@@ -222,7 +222,7 @@ jobs:
       - name: Use shared OCaml setting up steps
         uses: ./.github/actions/setup-ocaml
         with:
-          ocaml_version: ${{ OCAML_VERSION }}
+          ocaml_version: ${{ matrix.ocaml_version }}
 
       - name: Setup Rust
         uses: ./.github/actions/setup-rust
@@ -260,7 +260,7 @@ jobs:
       - name: Use shared OCaml setting up steps
         uses: ./.github/actions/ocaml-shared
         with:
-          ocaml_version: ${{ OCAML_VERSION }}
+          ocaml_version: ${{ matrix.ocaml_version }}
 
       - name: Setup Rust
         uses: ./.github/actions/setup-rust

.github/workflows/lint.yaml

@@ -5,16 +5,14 @@ on:
     branches: [ main, develop ]
   pull_request:
 
-env:
-  OCAML_VERSION: "4.14.2"
-
 jobs:
   lint:
     timeout-minutes: 10
     name: Lint - ${{ matrix.os }} - Rust ${{ matrix.toolchain }}
     runs-on: ${{ matrix.os }}
     strategy:
       matrix:
+        ocaml_version: [4.14.2]
         os: [ubuntu-24.04]
         toolchain: [1.84]
     steps:
@@ -26,7 +24,7 @@ jobs:
       - name: Use shared OCaml setting up steps
         uses: ./.github/actions/setup-ocaml
         with:
-          ocaml_version: ${{ OCAML_VERSION }}
+          ocaml_version: ${{ matrix.ocaml_version }}
       - name: Setup SQLite database for SQLx
         run: |
           sqlite3 /tmp/heartbeats.db < tools/heartbeats-processor/schema.sql