Expose user info for scaffold templates

Feature Suggestion

When writing scaffolder templates, it would be useful to have some basic info about the user who triggered the job injected so it can be used when composing action steps. Some values to start with might be: {{ user.name }} {{ user.username }} {{ user.email }}

Possible Implementation

Not sure?

Context

The same way we are able to grab the form UI parameters with {{ parameters.name }} and action outputs with {{ steps.publish.output.remoteUrl }}, we would like to grab some basic user info to use as inputs to actions eg. setting the input.access to the users username for publish:github

[kuangp]

This is the full implementation for our workaround:

const CurrentUserField = ({ onChange }: FieldProps<string>) => {
  const identityApi = useApi(identityApiRef);

  useAsync(async () => {
    const identity = await identityApi.getBackstageIdentity();
    const { name: userId } = parseEntityRef(identity.userEntityRef);
    onChange(userId);
  });

  return (<></>);
};

export const CurrentUserFieldExtension = scaffolderPlugin.provide(createScaffolderFieldExtension({
  component: CurrentUserField,
  name: 'GetCurrentUser',
}));

[kuangp]

still relevant