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.

• 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

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 }}"

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 }}"

• 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