CI: add shellcheck

Author: dannywillems

.github/workflows/lint.yml

@@ -55,6 +55,21 @@ jobs:
       - name: Run transaction Fuzzing check
         run: make check-tx-fuzzing
 
+  shellcheck:
+    name: Shellcheck - ${{ matrix.os }}
+    runs-on: ${{ matrix.os }}
+    strategy:
+      matrix:
+        os: [ubuntu-latest]
+    steps:
+      - uses: actions/checkout@v4
+      - name: Install shellcheck
+        run: |
+          sudo apt update || true
+          sudo apt install -y shellcheck || true
+      - name: Run shellcheck
+        run: make lint-bash
+
   hadolint:
     name: Hadolint - ${{ matrix.os }}
     runs-on: ${{ matrix.os }}

Makefile

@@ -159,6 +159,16 @@ format-md: ## Format all markdown and MDX files to wrap at 80 characters
 lint: ## Run linter (clippy)
 	cargo clippy --all-targets -- -D warnings --allow clippy::mutable_key_type
 
+.PHONY: lint-bash
+lint-bash: ## Check all shell scripts using shellcheck
+	@echo "Running shellcheck on shell scripts..."
+	@find . -name "*.sh" \
+		-not -path "*/target/*" \
+		-not -path "*/node_modules/*" \
+		-not -path "*/website/docs/developers/scripts/setup/*" \
+		-print0 | xargs -0 shellcheck --severity=warning --format=gcc
+	@echo "Shellcheck completed successfully!"
+
 .PHONY: lint-dockerfiles
 lint-dockerfiles: ## Check all Dockerfiles using hadolint
 	@if [ "$$GITHUB_ACTIONS" = "true" ]; then \