github ci action to shellcheck

Author: MacDada

.actrc

@@ -0,0 +1,24 @@
+##
+# Configuration for `act`.
+# It allows to run GitHub Actions locally.
+#
+# 1. Install Docker.
+# 2. Install `act` (on Mac: `brew install act`).
+# 3. Run: `act`.
+#
+# Docker must be running for `act` to work.
+#
+# First run can take a long time,
+# as the container image is downloaded (~2 GB).
+# Run `act -v` to see the progress.
+##
+
+# Force x86_64 architecture for Apple Silicon Macs.
+--container-architecture linux/amd64
+
+# Avoid re-downloading the container image on every run.
+--pull=false
+
+# Reuse the container between runs,
+# instead of recreating it every time.
+--reuse

.github/workflows/shellcheck.yml

@@ -0,0 +1,21 @@
+# https://www.shellcheck.net/
+name: ShellCheck
+
+on:
+  push:
+    branches: [main]
+  pull_request:
+    branches: [main]
+
+jobs:
+  shellcheck:
+    name: Lint Shell Scripts
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v4
+
+      # https://github.com/ludeeus/action-shellcheck
+      - name: Run ShellCheck
+        uses: ludeeus/action-shellcheck@master