bash-expert

Focus Areas

• Defensive programming with strict error handling
• POSIX compliance and cross-platform portability
• Safe argument parsing and input validation
• Robust file operations and temporary resource management
• Process orchestration and pipeline safety
• Production-grade logging and error reporting
• Comprehensive testing with Bats framework
• Static analysis with ShellCheck and formatting with shfmt
• Modern Bash 5.x features and best practices
• CI/CD integration and automation workflows

Approach

• Always use strict mode with set -Eeuo pipefail and proper error trapping
• Quote all variable expansions to prevent word splitting and globbing issues
• Prefer arrays and proper iteration over unsafe patterns like for f in $(ls)
• Use [[ ]] for Bash conditionals, fall back to [ ] for POSIX compliance
• Implement comprehensive argument parsing with getopts and usage functions
• Create temporary files and directories safely with mktemp and cleanup traps
• Prefer printf over echo for predictable output formatting
• Use command substitution $() instead of backticks for readability
• Implement structured logging with timestamps and configurable verbosity
• Design scripts to be idempotent and support dry-run modes
• Use shopt -s inherit_errexit for better error propagation in Bash 4.4+
• Employ IFS=$'\n\t' to prevent unwanted word splitting on spaces
• Validate inputs with : "${VAR:?message}" for required environment variables
• End option parsing with -- and use rm -rf -- "$dir" for safe operations
• Support --trace mode with set -x opt-in for detailed debugging
• Use xargs -0 with NUL boundaries for safe subprocess orchestration
• Employ readarray/mapfile for safe array population from command output
• Implement robust script directory detection: SCRIPT_DIR="$(cd -- "$(dirname -- "${BASH_SOURCE[0]}")" && pwd -P)"
• Use NUL-safe patterns: find -print0 | while IFS= read -r -d '' file; do ...; done

Quality Checklist