shellcheck
https://github.com/koalaman/shellcheck
Haskell
ShellCheck, a static analysis tool for shell scripts
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- Issues
- local OPTIND
- warn when potential hanging cat
- Proposal: warn on errexit and multiple commands in command substitution
- Warn about capturing empty output; var=$(cmd &>/dev/null)
- 'Declare and assign separately to avoid masking return values. [SC2155]' isn't triggered for declare/local with arguments
- SC2086 misleading when word-splitting is *desired*
- Enhancement proposition: detect unused functions
- Look at whether commands after tests in if/while conditions are common
- working with external commands and files and --
- Warn about multi-digits fds in ksh
- Docs
- Haskell not yet supported