chore: Split workflows and simplify testing

.github/workflows/ci.yaml

@@ -1,15 +1,6 @@
 name: CI
 
 on:
-  pull_request:
-    branches:
-    - main
-    paths-ignore:
-    - .editorconfig
-    - .gitignore
-    - CHANGELOG.md
-    - LICENSE.md
-    - README.md
   push:
     branches:
     - main
@@ -18,6 +9,7 @@ on:
     - .gitignore
     - CHANGELOG.md
     - LICENSE.md
+    - Makefile
     - README.md
 
 jobs:
@@ -30,35 +22,17 @@ jobs:
     - name: Setup Terraform
       uses: hashicorp/setup-terraform@v3
       with:
-        terraform_version: ${{ matrix.terraform_version }}
+        terraform_version: "1.10"
     - name: Initialise with no backend
       run: terraform init -backend=false
     - name: Check formatting
       run: terraform fmt -check -recursive
     - name: Validate the configuration
       run: terraform validate
-    strategy:
-      matrix:
-        terraform_version: [ "1.0", "1.1", "1.2", "1.3", "1.4", "1.5", "1.6" ]
-
-  caller-identity:
-    if: ${{ github.event_name == 'push' }}
-    name: Return the IAM user
-    permissions:
-      contents: read
-      id-token: write
-    runs-on: ubuntu-latest
-    steps:
-    - name: Configure AWS credentials
-      uses: aws-actions/configure-aws-credentials@v4
-      with:
-        aws-region: ${{ secrets.AWS_REGION }}
-        role-to-assume: arn:aws:iam::${{ secrets.AWS_ACCOUNT_ID }}:role/github
-    - run: aws sts get-caller-identity
 
   release:
     name: Release?
-    needs: [ caller-identity ]
+    needs: [ verify ]
     permissions:
       contents: write
       pull-requests: write

.github/workflows/pr.yaml

@@ -0,0 +1,31 @@
+name: PR
+
+on:
+  pull_request:
+    branches:
+    - main
+    paths-ignore:
+    - .editorconfig
+    - .gitignore
+    - CHANGELOG.md
+    - LICENSE.md
+    - Makefile
+    - README.md
+
+jobs:
+  verify:
+    name: Verify
+    runs-on: ubuntu-latest
+    steps:
+    - name: Checkout code
+      uses: actions/checkout@v4
+    - name: Setup Terraform
+      uses: hashicorp/setup-terraform@v3
+      with:
+        terraform_version: "1.10"
+    - name: Initialise with no backend
+      run: terraform init -backend=false
+    - name: Check formatting
+      run: terraform fmt -check -recursive
+    - name: Validate the configuration
+      run: terraform validate