mattcollie/variable-substitution

Github action for variable substitution

variable-substitution

A Github Action for substituting variables within JSON files using env variables.

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Inputs

• files (required): A comma-separated list of JSON files to process. File paths are relative to the workspace root.

Outputs

This action does not have any outputs.

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Usage Example

Workflow that uses the action

jobs:
  my_job:
    env:
      ENVIRONMENT: production
      API_ENDPOINT: https://api.example.com
    
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v4
      - name: Substitute Variables
        uses: mattcollie/variable-substitution@v1
        with:
          files: config.json

Original config.json:

{
  "api_url": "${{ API_ENDPOINT }}",
  "environment": "${{ ENVIRONMENT }}",
  "description": "Configuration for env: ${{ ENVIRONMENT }}"
}

After Substitution:

(Assuming your workflow defines the necessary secrets and environment variables)

{
  "api_url": "https://api.example.com",
  "environment": "production",
  "description": "Configuration for env: production"
}