Best Tools for Testing and Linting Shell Scripts
Compare ShellCheck, Bats-core, pre-commit: workflows, strengths and tradeoffs.
Updated
short verdict
Choose ShellCheck if you need static checks for shell-code mistakes. Choose Bats-core if you need executable tests for command output and exit status. Choose pre-commit if you want configured checks attached to the Git commit workflow.
These tools cover different stages of the job and can be used together.
Choose ShellCheck if you need static checks for shell-code mistakes.
best for
- You need static checks for shell-code mistakes
strengths
- Detects unsafe quoting and conditional expressions
- Reports shell portability issues
weaknesses
- Static analysis does not exercise a script with your real inputs.
Choose Bats-core if you need executable tests for command output and exit status.
best for
- You need executable tests for command output and exit status
strengths
- Test cases are Bash functions
- Produces TAP-compatible test results
weaknesses
- You must write test cases and choose representative inputs.
Choose pre-commit if you want configured checks attached to the Git commit workflow.
best for
- You want configured checks attached to the Git commit workflow
strengths
- Runs hooks written in different languages
- Manages hook environments and dependencies
weaknesses
- It runs configured checks; the linting or testing logic comes from those hooks.
Choose by workflow
- ShellCheck: you need static checks for shell-code mistakes.
- Bats-core: you need executable tests for command output and exit status.
- pre-commit: you want configured checks attached to the Git commit workflow.
Before adopting a tool
- ShellCheck: Static analysis does not exercise a script with your real inputs.
- Bats-core: You must write test cases and choose representative inputs.
- pre-commit: It runs configured checks; the linting or testing logic comes from those hooks.
FAQ
- Are these tools interchangeable?
- No. Choose ShellCheck if you need static checks for shell-code mistakes. Choose Bats-core if you need executable tests for command output and exit status. Choose pre-commit if you want configured checks attached to the Git commit workflow.
- What should I check before using one?
- Try the workflow on a small fixture and confirm the platform, configuration and permissions you need. Static analysis does not exercise a script with your real inputs.