I wrote a tool to make shell scripting just a little bit easier. It has a syntax that reads just a little bit like English, so that you can ask questions of your environment. That means you can do things like:

Check the version of a CLI tool:

$ is cli version tmux gt 3.2 && echo || echo

Check an OS version by its code name:

$ is os version-codename in ventura,monterey

Do things only if a dependency is installed:

$ is there go && go install golang.org/x/tools/cmd/goimports@latest

Query a CLI version:

$ is known cli version bash

5.2.15

Check if today is Wednesday using a case insensitive regex:

$ is cli output stdout date like "(?i)wed"

Update a binary if it's older than 7 days:

$ is cli age goimports gt 7 days && go install golang.org/x/tools/cmd/goimports@latest

Check the major (or minor, or patch) version of your OS:

$ is os version --major eq 13

Install if you have passwordless sudo:

$ is user sudoer && sudo apt-get install ripgrep

Check the output of STDERR for an arbitrary command:

$ is cli output stderr ssh --arg="-V" like 9.0p1

The idea is to make some scripting tasks less tedious. I mostly wrote this because I could and because I enjoyed doing it.