shellcheck-configurationlisted

# ShellCheck Configuration and Static Analysis Comprehensive guidance for configuring and using ShellCheck to improve shell script quality, catch common pitfalls, and enforce best practices through static code analysis. ## When to Use This Skill - Setting up linting for shell scripts in CI/CD pipelines - Analyzing existing shell scripts for issues - Understanding ShellCheck error codes and warnings - Configuring ShellCheck for specific project requirements - Integrating ShellCheck into development workflows - Suppressing false positives and configuring rule sets - Enforcing consistent code quality standards - Migrating scripts to meet quality gates ## ShellCheck Fundamentals ### What is ShellCheck? ShellCheck is a static analysis tool that analyzes shell scripts and detects problematic patterns. It supports: - Bash, sh, dash, ksh, and other POSIX shells - Over 100 different warnings and errors - Configuration for target shell and flags - Integration with editors and CI/CD systems ### Installation ```bash # macOS with Homebrew brew install shellcheck # Ubuntu/Debian apt-get install shellcheck # From source git clone https://github.com/koalaman/shellcheck.git cd shellcheck make build make install # Verify installation shellcheck --version ``` ## Configuration Files ### .shellcheckrc (Project Level) Create `.shellcheckrc` in your project root: ``` # Specify target shell shell=bash # Enable optional checks enable=avoid-nullary-conditions enable=require-variable-br