CODEWITHSUNDEEP
npm
AksCA
AksCA

Reputation: 33

Command to list all npm_package_vars

Is there a command to list all the npm_package_var variables?

I know individually we can get the vars using npm_package_var syntax.

Is there a command that I can use to list all these vars?

Upvotes: 1

Views: 1454

Answers (1)

RobC
RobC

Reputation: 24952

Short Answer: npm does not provide a built-in command that does exactly what you need. However, it can list all variables. For instance:

  1. Firstly, cd to your project directory.

  2. Then run the following command to list all variables:

    npm run env

The documentation states the following about the env script:

The env script is a special built-in command that can be used to list environment variables that will be available to the script at runtime. If an “env” command is defined in your package, it will take precedence over the built-in.

Solution:

To list the npm_package_vars only, consider piping the result of the aforementioned npm run env command to either; grep if using *nix, or to findstr if using Windows.

For instance, firstly cd to your project directory then run either of the following compound commands - depending on which OS you're using:

  • On *nix platforms run the following:

    npm run env | grep ^npm_package_

  • Or, on Windows run the following instead:

    npm run env | findstr /B npm_package_

Note (Git For Windows):

If you're using Git for Windows (i.e. if you're using as your preferred command line) then I recommend utilizing the aforementioned grep command:

npm run env | grep ^npm_package_

However if for some reason you wanted to use findstr instead of grep, (when using git-bash), you'll need to replace the /B option with -B instead. For instance:

npm run env | findstr -B npm_package_

Or, if that fails, then try using two forward slashes instead. For instance:

npm run env | findstr //B npm_package_

Btw. The /B option matches a pattern if it's at the beginning of a line. This is analogous to the caret ^ in GREP.`

Upvotes: 3

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