package.json - is it possible to use version as a variable in script

Question

Every time I compress my project, I need to manually sync version with the generated file name like CCCC007.tgz
In my package.json, compress-files script like below:

{
  "name": "MyBuild",
  "version": "0.0.7",
  "scripts": {
    "dev": "nodemon --legacy-watch ./src",
    "start": "node src/",
    "compress-files": "tar --exclude='./node_modules' --exclude='./myBuild.pem' --exclude='./config/local.json' -zcvf ~/CCCC007.tgz . ",
  },
}

I am wondering whether I can make the version as variable and use it in the script compress-files with something like:

  "name": "MyBuild",
  "version": "0.0.7",
  "scripts": {
    "dev": "nodemon --legacy-watch ./src",
    "start": "node src/",
    "compress-files": "tar --exclude='./node_modules' --exclude='./myBuild.pem' --exclude='./config/local.json' -zcvf ~/CCCC${this.version}.tgz . ",
  },

This might help you "Automating versioning and publication" itnext.io/… — Nishant S Vispute
– Nishant S Vispute, Commented May 27, 2021 at 2:44
@Nishant S Vispute You’ve read all of your member-only stories this month. — CCCC
– CCCC, Commented May 27, 2021 at 2:45
sorry, I don't understand your comment is that msg you see on the link or is it a question — Nishant S Vispute
– Nishant S Vispute, Commented May 27, 2021 at 2:49
@Nishant S Vispute I cannot view the post in your link because I am not a member — CCCC
– CCCC, Commented May 27, 2021 at 2:53
neither am i a member on that site but somehow it does shows me the article anyways nevermind that link here is a link from StackOverflow for the same stackoverflow.com/questions/13059991/… — Nishant S Vispute
– Nishant S Vispute, Commented May 27, 2021 at 2:58

Codebling · Accepted Answer · 2021-05-27 03:00:41Z

1

You can't refer to another object in JSON, and certainly not inside a value.

From the / direction, it looks like you're on linux. You can probaly do something like this:

"get-version": "node -e \"console.log(require('./package.json').version)\"",
"compress-files": "tar [...] `npm run get-version`",

That being said, there are tools to releases and versioning that should make life easier. You could give Release-It a try. But...if a package.json script with tar is all you need, don't let anyone tell you that you should be doing it a different way.

edited May 27, 2021 at 3:00

answered May 27, 2021 at 2:47

Codebling

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Comments

juan · Accepted Answer · 2022-12-23 23:16:19Z

0

As far as I know, you can use this variables inside the package.json:

${npm_package_name} ${npm_package_version}

Readed from this post

answered Dec 23, 2022 at 23:16

juan

1

Comments

snnsnn · Accepted Answer · 2023-04-08 03:57:54Z

You can access package.json variables inside scripts section:

  "scripts": {
    "inst": "code --install-extension ${npm_package_name}-${npm_package_version}.vsix",
    "unist": "code --uninstall-extension ${npm_package_name}-${npm_package_version}.vsix"
  },

Also you can access them as environment variables via process.env:

http.createServer(...).listen(process.env.npm_package_config_port);

The package.json fields are tacked onto the npm_package_ prefix. So, for instance, if you had {"name":"foo", "version":"1.2.5"} in your package.json file, then your package scripts would have the npm_package_name environment variable set to "foo", and the npm_package_version set to "1.2.5". You can access these variables in your code with process.env.npm_package_name and process.env.npm_package_version, and so on for other fields.

JaffBeto · Accepted Answer · 2023-11-23 11:59:55Z

0

The correct syntax for using package.json values in scripts is: (you need to escape in the string "...")

%npm_package_name%

%npm_package_version%

"scripts": {
  "serve": "ng serve -o --ssl --project \"%npm_package_name%\""
}

here have another example (by: Hadar Dashty): https://medium.com/@hadards/change-default-ng-serve-proxy-in-net7-project-with-angular-launch-998b1cdcaea2

answered Nov 23, 2023 at 11:59

JaffBeto

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