[Python] ProjectName not picked up from command line argument

Hello,

Thanks in advance & apologies if I'm making some obvious mistake; pretty new with Swagger. Similar if I've missed the documentation explaining this; I've not been able to find it.

I am trying to generate a python client without using a config file as input (CI pipelines reasons), but am not meeting with success. I have tried tweaking my command a lot to no avail, and am not familiar enough with java to dig into it effectively. Opening an issue based on "(If -D{optionName} does not work, please open a ticket and we'll look into it)" at https://github.com/swagger-api/swagger-codegen#getting-started.

Swagger-codegen version

3.0.25

Swagger declaration file content or url

I don't believe it's applicable but for completeness I have a file openapi.json used as the input: https://gist.github.com/rhotchkiss/dd36a38e1645c1118bcb1015ea16dbff

Command line used for generation

The command line not acting as I expect is:

java -jar swagger-codegen-cli.jar generate -i openapi.json -l python -o ./python-api_cli -DpackageName="package_name" -DprojectName="project_name" -DpackageVersion="0.0.1_alpha"

Steps to reproduce

Given a file api_config.json, the contents of which is:

{
  "projectName": "project_name",
  "packageName":"package_name",
  "packageVersion":"0.0.1_alpha"
}

I can run:
java -jar swagger-codegen-cli.jar generate -i openapi.json -l python -o ./python-api_config -c api_config.json

To get my desired output. Notably in /python-api_config/setup.py I see

NAME = "project_name"
VERSION = "0.0.1_alpha"

I am expecting to see the same in /python-api_cli/setup.py if I run:

java -jar swagger-codegen-cli.jar generate -i openapi.json -l python -o ./python-api_cli -DpackageName="package_name" -DprojectName="project_name"  -DpackageVersion="0.0.1_alpha"

However I see

NAME = "swagger-client"
VERSION = "0.0.1_alpha"

Suggesting that -DpackageVersion has been picked up, but DprojectName has not been and I am not sure why/if it's expected or what.

NB: I see that both commands give 6 prints of:
"[Thread-1] WARN i.s.c.v.g.DefaultCodegenConfig - String to be sanitized is null. Default to Object"

Related issues/PRs

I have attempted a search mostly on projectName/python and not found anything related.

Suggest a fix/enhancement

N/A Depends on if this is indeed a bug.

Reproduce the two swagger-codegen CLI commands with openapi.json and api_config.json, then compare the generated python-api_config/setup.py and python-api_cli/setup.py files. Start by tracing how the Python generator handles projectName, packageName, and packageVersion from command-line properties versus the config file. Done means the CLI-generated setup.py uses the supplied projectName consistently.