How to know the version of currently installed package from yarn.lock

I found out that yarn whyis the best way to find out the currently installed version of a package (Thanks to one of my colleague who point out to me). This is how my test code looks in the JavaScript.

const { spawnSync } = require('child_process');const packageName = 'micromatch';const whyBuffer = spawnSync('yarn', ['why', packageName]);const grepBuffer = spawnSync('grep', ['Found'], { input: whyBuffer.stdout });const outputArray = grepBuffer.stdout.toString().split('\n');console.log(outputArray); // ['info \r=> Found "micromatch@3.1.10"',    'info \r=> Found "fast-glob#micromatch@4.0.2"', ''  ]const parsedOutputArray = outputArray.filter(output => output.length > 0).map((output) => output.split('@')[1].replace('"', ''))console.log(parsedOutputArray); // [ '3.1.10', '4.0.2' ]

Since, you know the name of the package, do this:

yarn list --pattern <package_name>

The above command will get you all installed versions of a package at any depth. For example, I have different versions of camelcase library installed at various depths. On running the command : yarn list --pattern "camelcase", this is the output:

yarn list v1.22.5├─ camelcase@6.2.0└─ yargs-parser@13.1.2   └─ camelcase@5.3.1

npm list --depth=0 is 1000x faster than yarn why <each package>.It also tells you about extraneous dependencies, unmet peer deps, etc, but the output is very clean - still cleaner than yarn why