'Is there an npm cli option get package name from local package.json?

I want to get details from package.json on the command line. An example:

$ cd ~/my-node-package
$ npm commandiamlookingfor package name
my-package-name

I know this would be a trivial script to write. I could do it like this:

node -e "try {var pack=require('./package.json'); console.log(pack.name); } catch(e) {}"

But any code I don't have to write (and maintain) is the best code. Also, since I want to use this for shell integrations it will run a lot; a native implementation would maybe be faster.

npmpackage.json


Solution 1:[1]

If you decide to go with your initial idea of using the node command, you could make it a bit cleaner by using the -p argument, which is shorthand for --print:

node -p "require('./package.json').name"

or with error handling

node -p "try { require('./package.json').name } catch(e) {}"

Solution 2:[2]

I also needed this but I try to keep node out of it since I never know if the docker container I will be using to run the script will actually have node installed (this is also why I won't use jq). I usually use this shell script

npm run env | grep "npm_package_name" | awk -F "=" '{print $2}'

Basically what it does is

  1. get env of npm package
  2. grep the line with "npm_package_name"
  3. split on "=" and return second entry

Solution 3:[3]

If you are a sed-o-phile: npm run env | sed -n '/npm_package_name/{s/.*=//;p;}'

The -n switch suppress auto print

The /npm_package_name/ address pattern selects for that line

{ starts a command block

s/.*=//; substitutes everything through the equal sign with nothing

p; prints the buffer

} ends the command block

Sources

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Source: Stack Overflow

Solution Source
Solution 1 user56reinstatemonica8
Solution 2
Solution 3 Jeff

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