Some other shell script check and formatting tools:

All shells take the -n option to perform a basic syntax check.

Debian has a script for checking scripts for bashisms:

https://manpages.debian.org/checkbashisms

bashate is a automated style checker for bash (similar to pep8 for python):

https://opendev.org/openstack/bashate

lintshell is an early prototype of a shell linter based on the Morbig trustworthy static parser for POSIX shell, based on the Why3 platform for deductive program verification.

https://www.irif.fr/~treinen/colis/ https://github.com/colis-anr/morbig https://github.com/colis-anr/lintshell

Shellharden helps rewrite scripts for ShellCheck compliance:

https://github.com/anordal/shellharden/

shfmt is gofmt for shell:

https://github.com/mvdan/sh

ShellScriptFormatter is another formatter:

https://github.com/osalvador/ShellScriptFormatter

Some of these tools and other tools can be automatically run by check-all-the-things:

https://github.com/collab-qa/check-all-the-things/