CONTRIBUTING.md

Contributing

Adding a Vision feature

To add a Google Cloud Vision feature support to Dovelet (both the utility and the library), you need to change two files: feature.go and cmd/dovelet/flag.go.

In feature.go, you need to:

1. Add a constant to the DetectionFeature enumeration. The new constant must be named after the feature to add.
2. Add a case in DetectionFeature's VisionFeature function. That new case translates the new constant to its respective Vision-specific value.

In cmd/dovelet/flag.go, you need to:

1. Add a new boolean field to the CLArgs structure.
2. Add a new command line argument in the ParseArgs function. To do so:
   1. Create a new variable named after the new feature. Assign the value returned by f.Bool to that variable, called with proper argument values.
   2. Assign the variable's value to the new field in the CLArgs instance. The value needs to be de-referenced.
3. Add a case in CLArgs's Feature function. That case maps the new command line argument with the previously added feature (from feature.go).