How to get the latest yarn package version in a shell (sh) script?-CodePudding

I have the following so far:

#!/bin/sh 

getVersionInfo() {
    yarn info my-package version
}

getVersion() {
    VERSION_REGEX='^'
    $1 =~ $VERSION_REGEX
}

VERSION_INFO=$(getVersionInfo)
VERSION=$(getVersion "$VERSION_INFO")
echo $VERSION

I eventually want to run the script and be able to upgrade all my projects in one command to the latest version of my-package.

I am stuck on two things:

why does the console print out TWICE?
how do i work out the regex (or use another technique) to get the version number?

The yarn info my-package version output is:

└─ my-package@workspace:shared
   ├─ Version: 0.0.28
   │
   └─ Dependencies
      ├─ @grpc/grpc-js@npm:^1.5.3 → npm:1.5.9
      ├─ @types/dinero.js@npm:^1.9.0 → npm:1.9.0
      ├─ @types/gulp-sourcemaps@npm:^0.0.35 → npm:0.0.35

I am using yarn version 3.2.0

CodePudding user response：

Thanks to @kj-crypto the solution requires no functions and can be a one-liner:

VERSION="$(yarn info my-package version | grep -oE 'Version: (?[0-9.]*)' | grep -oE '(?[0-9.]*)')