Merge remote-tracking branch 'origin/pull/37'

* origin/pull/37:
  Add shellcheck GitLab CI
  Add Differential ShellCheck GitHub Workflow

.github/workflows/differential-shellcheck.yml

@@ -0,0 +1,23 @@
+name: Differential ShellCheck
+on:
+  pull_request:
+    branches:
+      - master
+
+permissions:
+  contents: read
+
+jobs:
+  lint:
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Repository checkout
+        uses: actions/checkout@v3
+        with:
+          fetch-depth: 0
+
+      - name: Differential ShellCheck
+        uses: redhat-plumbers-in-action/differential-shellcheck@latest
+        with:
+          token: ${{ secrets.GITHUB_TOKEN }}

.gitlab-ci.yml

@@ -0,0 +1,6 @@
+shellcheck:
+    stage: test
+    image: koalaman/shellcheck-alpine:latest
+    script:
+      - shellcheck common
+      - shellcheck arch-chroot.in genfstab.in pacstrap.in