adds format check workflow

.JuliaFormatter.toml

@@ -1,3 +1 @@
 style = "blue"
-format_markdown = true
-format_docstrings = true

.github/workflows/CI.yml

@@ -15,16 +15,16 @@ jobs:
       fail-fast: false
       matrix:
         version:
-          - "1.6.7"  # LTS
+          - "1.6.7" # LTS
           - "1.6"
-          - "1"    # Latest Release
+          - "1" # Latest Release
         os:
           - ubuntu-latest
         arch:
           - x64
 
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v4
       - uses: julia-actions/setup-julia@latest
         with:
           version: ${{ matrix.version }}
@@ -53,10 +53,10 @@ jobs:
     name: Documentation
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v4
       - uses: julia-actions/setup-julia@latest
         with:
-          version: '1'
+          version: "1"
       - run: |
           git config --global user.name name
           git config --global user.email email

.github/workflows/DocCleanup.yml

@@ -9,20 +9,20 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout gh-pages branch
-        uses: actions/checkout@v2
+        uses: actions/checkout@v4
         with:
           ref: gh-pages
 
       - name: Delete preview and history
         run: |
-            git config user.name "Documenter.jl"
-            git config user.email "[email protected]"
-            git rm -rf "previews/PR$PRNUM"
-            git commit -m "delete preview"
-            git branch gh-pages-new $(echo "delete history" | git commit-tree HEAD^{tree})
+          git config user.name "Documenter.jl"
+          git config user.email "[email protected]"
+          git rm -rf "previews/PR$PRNUM"
+          git commit -m "delete preview"
+          git branch gh-pages-new $(echo "delete history" | git commit-tree HEAD^{tree})
         env:
-            PRNUM: ${{ github.event.number }}
+          PRNUM: ${{ github.event.number }}
 
       - name: Push changes
         run: |
-            git push --force origin gh-pages-new:gh-pages
+          git push --force origin gh-pages-new:gh-pages

.github/workflows/FormatCheck.yml

@@ -0,0 +1,44 @@
+name: format-check
+
+on:
+  push:
+    branches:
+      - "master"
+      - "release-*" # Match release branches
+    tags: "*" # Trigger on tag pushes
+  pull_request: # Trigger on pull requests
+
+jobs:
+  build:
+    runs-on: ${{ matrix.os }}
+    strategy:
+      matrix:
+        julia-version: [1] # Julia versions
+        julia-arch: [x86] # Architectures
+        os: [ubuntu-latest] # OS
+    steps:
+      # Step 1: Set up Julia
+      - name: Set up Julia
+        uses: julia-actions/setup-julia@latest
+        with:
+          version: ${{ matrix.julia-version }}
+          arch: ${{ matrix.julia-arch }}
+
+      # Step 2: Check out code
+      - name: Checkout code
+        uses: actions/checkout@v4
+
+      # Step 3: Install JuliaFormatter and check formatting
+      - name: Install JuliaFormatter and check formatting
+        run: |
+          julia -e '
+          using Pkg;
+          Pkg.add(PackageSpec(name="JuliaFormatter"));
+          using JuliaFormatter;
+          result = format(".", verbose=true)
+          if !result
+              error("Some files are not properly formatted. Please run `using JuliaFormatter; format(\".\")` locally.")
+          else
+              println("All files are properly formatted.")
+          end
+          '