Proposal: `wp package is-installed` subcommand

[baizmandesign]

Feature Request

• Yes, I reviewed the contribution guidelines.

Describe your use case and the problem you are facing

I'd like to be able to determine whether a WP CLI package is installed. Yes, this is possible by using grep:

wp package list | grep package-name

But I'm thinking of creating a subcommand that peers with wp plugin is-installed. This proposed command would also exit with 0 when installed and 1 when not installed.

[swissspidy]

This would be trivial to add, but curious, what's the use case for this?

[baizmandesign]

@swissspidy Thanks for your reply. The use case is to detect the presence of packages in a programmatic manner. But isn't the use case similar to that of wp plugin is-installed?

I'm aware it's a small refinement; I've been seeking ways to contribute a little bit to WP CLI, and this seemed manageable. But perhaps there are better beginner issues to work on! As my original comment said, using the wp package list subcommand with grep works just as well for programmatic purposes. (But I am thinking architecturally in the sense of making the wp package subcommands commensurate with the wp plugin subcommands, since packages are like plugins for WP CLI and should maybe be treated as such.)

[swissspidy]

Gotcha, thanks! Yeah for scripting it could be useful.

[baizmandesign]

@swissspidy Cool! As this is a low priority (for both of us, I think), I may not begin working on this for a while.