The Google style guide doesn’t disagree with you, it says to code exclusively for bash where possible (ie mostly everywhere inside Google) and to prefer [[ ove

The Google style guide doesn’t disagree with you, it says to code exclusively for bash where possible (ie mostly everywhere inside Google) and to prefer [[ over [ and test: https://google.github.io/styleguide/shellguide.html#s6.3-tests https://google.github.io/styleguide/shellguide.html#s6.3-tes... In a scenario where you also need to support shells other than bash, Google’s shell style guide doesn’t say to use [ over test.