Validate mono changesets in CI

See appsignal/mono#87 for context.

Add a CI job that validates changesets using Mono.

Split the existing "CI" job into specific jobs for each part
of the flow.

Author: unflxw

.github/workflows/ci.yaml

@@ -17,12 +17,50 @@ concurrency:
   cancel-in-progress: "${{ !contains(github.ref, 'main')}}"
 
 jobs:
-  ci:
+  validate-changesets:
+    name: Validate changesets
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout project
+        uses: actions/checkout@v4
+      - name: Checkout Mono
+        uses: actions/checkout@v4
+        with:
+          repository: appsignal/mono
+          path: tmp/mono
+      - name: Install Ruby
+        uses: ruby/setup-ruby@v1
+        with:
+          ruby-version: '3.3'
+      - name: Validate changesets
+        run: tmp/mono/bin/mono changeset validate
+
+  build:
+    name: "cargo build"
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v4
-      - run: rustup component add clippy rustfmt
       - run: cargo build --verbose
+
+  test:
+    name: "cargo test"
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
       - run: cargo test --verbose
+
+  clippy:
+    name: "Rust clippy"
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - run: rustup component add clippy
       - run: cargo clippy --verbose --tests --all-targets --all-features -- -D warnings
+
+  formatter:
+    name: "Rust formatter"
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - run: rustup component add rustfmt
       - run: cargo fmt --check --verbose

.github/workflows/publish_release.yaml

@@ -8,8 +8,27 @@ env:
   PUBLISH_GIT_EMAIL: "support+build-sign@appsignal.com"
 
 jobs:
+  validate-changesets:
+    name: Validate changesets
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout project
+        uses: actions/checkout@v4
+      - name: Checkout Mono
+        uses: actions/checkout@v4
+        with:
+          repository: appsignal/mono
+          path: tmp/mono
+      - name: Install Ruby
+        uses: ruby/setup-ruby@v1
+        with:
+          ruby-version: '3.3'
+      - name: Validate changesets
+        run: tmp/mono/bin/mono changeset validate
+
   build:
     name: "Build the release"
+    needs: [validate-changesets]
     runs-on: ${{matrix.runner}}
     strategy:
       fail-fast: true