Add integration github action with yamllint

Author: posquit0

.github/workflows/integration.yaml

@@ -0,0 +1,57 @@
+name: Integration
+
+on:
+  push:
+    branches:
+    - master
+  pull_request: {}
+
+concurrency:
+  group: integration-${{ github.ref }}
+  cancel-in-progress: true
+
+jobs:
+  changed:
+    runs-on: ubuntu-latest
+
+    outputs:
+      yaml_changed: ${{ steps.filter-yaml.outputs.changed }}
+      yaml_files: ${{ steps.filter-yaml.outputs.files }}
+
+    steps:
+    - name: Checkout
+      uses: actions/checkout@v2
+      with:
+        fetch-depth: 0
+
+    - name: Get Changed Files
+      id: changed-files
+      uses: dorny/paths-filter@v2
+      with:
+        list-files: json
+        filters: |
+          yaml:
+          - '**/*.yaml'
+          - '**/*.yml'
+
+    - name: Filter changed YAML files to outputs
+      id: filter-yaml
+      run: |
+        echo ::set-output name=changed::${{ steps.changed-files.outputs.yaml }}
+        echo ::set-output name=files::${{ steps.changed-files.outputs.yaml_files }}
+
+
+  yaml:
+    needs:
+    - changed
+    if: ${{ needs.changed.outputs.yaml_changed != 'false' }}
+    runs-on: ubuntu-latest
+
+    steps:
+    - name: Checkout
+      uses: actions/checkout@v2
+
+    - name: Lint YAML Files
+      id: yaml-lint
+      run: |
+        yamllint .

.github/workflows/main.yml

@@ -9,13 +9,13 @@ jobs:
     container: thomasweise/texlive
 
     steps:
-      - name: Checkout repo
-        uses: actions/checkout@v2
+    - name: Checkout repo
+      uses: actions/checkout@v2
 
-      - name: Compile
-        run: make
+    - name: Compile
+      run: make
 
-      - uses: actions/upload-artifact@v2
-        with:
-          name: examples
-          path: examples/*.pdf
+    - uses: actions/upload-artifact@v2
+      with:
+        name: examples
+        path: examples/*.pdf

.yamllint.yaml

@@ -0,0 +1,53 @@
+yaml-files:
+- '*.yaml'
+- '*.yml'
+
+rules:
+  braces:
+    min-spaces-inside: 0
+    max-spaces-inside: 1
+    min-spaces-inside-empty: 0
+    max-spaces-inside-empty: 0
+  brackets:
+    min-spaces-inside: 0
+    max-spaces-inside: 1
+    min-spaces-inside-empty: 0
+    max-spaces-inside-empty: 0
+  colons:
+    max-spaces-before: 0
+    max-spaces-after: 1
+  commas:
+    max-spaces-before: 0
+  comments:
+    level: warning
+    require-starting-space: true
+    min-spaces-from-content: 1
+  comments-indentation: disable
+  document-end: disable
+  document-start: disable
+  empty-lines:
+    level: warning
+    max: 2
+    max-start: 0
+    max-end: 1
+  empty-values:
+    forbid-in-block-mappings: true
+    forbid-in-flow-mappings: true
+  hyphens:
+    max-spaces-after: 1
+  indentation:
+    spaces: consistent
+    indent-sequences: false
+  key-duplicates: enable
+  key-ordering: disable
+  line-length: disable
+  new-line-at-end-of-file: enable
+  # Use UNIX new line characters `\n` instead of DOS new line characters `\r\n`
+  new-lines:
+    type: unix
+  octal-values: disable
+  quoted-strings:
+    quote-type: any
+    required: false
+  trailing-spaces: enable
+  truthy: disable