[TypeScript-Fetch] Local variables can conflict with parameters

[masaeedu]

Description

The typescript-fetch client template inserts local variables with names like path, which is a fairly common name for API parameters. If an API has a parameter named path, the generated client will have a compile error and the transpiled code can have subtle bugs.

Swagger-codegen version

Issue is present in 96137e5. Specifically, the lines starting here.

Swagger declaration file content or url

Latest Docker API spec

Command line used for generation

generate -i /moby/api/swagger.yaml -l typescript-fetch -o /package

Suggest a fix/enhancement

Use mangled names for the local variables (e.g. const ____path or such).

[wing328]

@masaeedu For other generators, we usually add a prefix to the local variable (e.g. localVarPath or local_var_path).

May I know if you've time to help us add something similar to the TS Fetch generator? A good starting point is https://github.com/swagger-api/swagger-codegen/blob/master/modules/swagger-codegen/src/main/resources/typescript-fetch/api.mustache