extract-package-version

GitHub Action that reads a package.json file and exposes its version field as a workflow output.

This is useful when you want to reuse the package version for tagging, naming build artifacts, publishing, or release automation.

What it does

• Reads package.json from the repository root by default
• Supports packages inside subdirectories, which is useful for monorepos
• Exposes the detected version as steps.<id>.outputs.version

Usage

Make sure your workflow checks out the repository before running the action.

on: push

name: Build

jobs:
  build:
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v6

      - name: Extract package version
        id: package_version
        uses: saionaro/extract-package-version@v1.4.0

      - name: Print version
        run: echo "${{ steps.package_version.outputs.version }}"

Inputs

Name	Required	Default	Description
path	No	Repository root	Directory that contains package.json

Outputs

Name	Description
version	The value of the version field from package.json

Monorepo Example

If your package lives in a subdirectory, pass that directory through path.

on: push

name: Build

jobs:
  build:
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v4

      - name: Extract package version
        id: package_version
        uses: saionaro/extract-package-version@v1.4.0
        with:
          path: packages/my-package

      - name: Use version
        run: echo "Version: ${{ steps.package_version.outputs.version }}"

Notes

• path should point to the directory containing package.json, not to the file itself
• The action fails if the file cannot be read or if package.json does not contain a valid version