shellcheck
Shell script static analysis tool. Check shell scripts for errors, usage of deprecated/insecure features, and bad practices. More information: https://www.shellcheck.net.
- Check a shell script:
shellcheck {{path/to/script.sh}}
- Check a shell script interpreting it as the specified shell dialect (overrides the shebang at the top of the script):
shellcheck --shell {{sh|bash|dash|ksh}} {{path/to/script.sh}}
- Ignore one or more error types:
shellcheck --exclude {{SC1009,SC1073}} {{path/to/script.sh}}
- Also check any sourced shell scripts:
shellcheck --checked-sourced {{path/to/script.sh}}
- Display output in the specified format (defaults to
tty
):shellcheck --format {{tty|checkstyle|diff|gcc|json|json1|quiet}} {{path/to/script.sh}}
- Enable one or more optional checks:
shellcheck --enable={{add-default-case|avoid-nullary-conditions}}
- List all available optional checks that are disabled by default:
shellcheck --list-optional
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