gecko-dev/servo/docs/STYLE_GUIDE.md

Style Guide

The majority of our style recommendations are automatically enforced via our automated linters. This document has guidelines that are less easy to lint for.

Shell scripts

Shell scripts are OK for small tasks or wrappers, but prefer to use Python for anything with a hint of complexity or in general.

Shell scripts should be written against bash, starting with this shebang:

#!/usr/bin/env bash

Note that the version of bash available on OS X by default is quite old, so be careful when using new features.

Scripts should enable a few options at the top for robustness:

set -o errexit
set -o nounset
set -o pipefail

Quote all variables, using the full form: "${SOME_VARIABLE}".

Use "$(some-command)" instead of backticks for command substitution. Note that these should be quoted as well.