programmatically setting baseUrl in java / retrofit2

Description

Using Java / retrofit2 client generation.

It generates ApiClient where baseUrl is locally set in createDefaultAdapter and passed to Retrofit.Builder.

I want to use this same generated code, but with different baseUrls programmatically.

That does not seem to be possible.

Swagger-codegen version

2.2.2-SNAPSHOT

Command line used for generation

java -jar ${swaggerCodegenJar} generate \
     -l java \
     --library retrofit2 \
     --group-id TO-BE-DELETED \
     --artifact-id java-retrofit2-client \
     --api-package api \
     --invoker-package invoker \
     --model-package model \
     -i DocService-folders-swagger.json \
     -o /tmp

Related issues

https://github.com/swagger-api/swagger-codegen/issues/2823

Suggest a Fix

Rather than have a bunch of different constructors for ApiClient, use a "fluent/builder" style that includes baseUrl as one of its methods.

Start with the generated ApiClient, especially createDefaultAdapter where baseUrl is set and passed to Retrofit.Builder. Review the Java retrofit2 generation path using the command shown in the issue and determine how a fluent or builder-style configuration could expose baseUrl. Done means generated clients can set different baseUrls programmatically without requiring multiple constructors.