Get en variable value from inline command?

[sinedied]

Can we assign env variables from command results?

In my package.json I have:

    "build": "cross-env PKG_VERSION=$(npm run version) ng build",
    "version": "node -p -e \"require('./package.json').version\""

Does this work on windows? (I only have a mac at hand for now)
Thanks

[kentcdodds]

I'm not sure whether that works properly on windows. But it's definitely outside of the scope of cross-env because the way it works on mac is what is inside $() will run before the rest of the script is run (so if you were to put a console.log in cross-env, you wouldn't see $(npm run version) at all, but instead you'd see the evaluated version).

Incidentally, for this specific scenario, you might consider using the environment variable npm_package_version which is set for you automatically when running npm scripts. (Learn more).

Good luck!

[sinedied]

Thanks for the tip with npm_package_version, but with other use cases is there a way to get value from another command execution?

[kentcdodds]

I'm not sure about that. I don't know how you'd do $(command) on Windows. But in any case, that's definitely not in scope for cross-env I'm afraid. Best of luck to you!