fix: nswag.js try detect the runtime version from config file

[dylanvdmerwe]

Often we have issues where the nswag.json file will specify the "runtime" to something other than "net80". In my case "net90" and now going forward "net100".

With NSwag installed with NPM, either as a global package or as a devDependencies in package.json. In my case "nswag" is listed as a devDependency in package.json.

If you then execute the NSwag NPM script (nswag run nswag.json), the js script sets the defaultCoreVersion to Net80. This will load the NSwag command line tool for .NET Core Net80.

But because the runtime specified in the config file is different (net90 in my case) you will get this error:

NSwag NPM CLI
NSwag command line tool for .NET Core Net80, toolchain v14.2.0.0 (NJsonSchema v11.1.0.0 (Newtonsoft.Json v13.0.0.0))
Visit http://NSwag.org for more information.
NSwag bin directory: C:\Projects\WebsiteProjects\Website.Site\site\node_modules\nswag\bin\binaries\Net80

Executing file '..\..\..\WebServiceProjects\WebService.SiteApi\nswag.json' with variables ''...
System.InvalidOperationException: The specified runtime in the document (Net90) differs from the current process runtime (Net80). Change the runtime with the '/runtime:Net90' parameter or run the file with the correct command line binary.

You'll see the incorrect binary was used (Net80 instead of Net90)

If you then try run npm run nswag.json /runtime:Net90 you will get this error:

NConsole.UnusedArgumentException: Unrecognised arguments are present: [/runtime:Net90]

What this fix does is attempt to set defaultCoreVersion from the runtime specified in the json configuration file (if it exists).

In the case where the config file sets 'runtime': 'net90', and you run nswag run nswag.json, defaultCoreVersion is set to Net90 for you loading the appropriate binary:

NSwag NPM CLI
Found runtime from config: Net90
Using runtime: Net90
NSwag command line tool for .NET Core Net90

If runtime is not set in the config file, the original defaultCoreVersion of Net80 will be used.

Tested on latest 14.6.2.

[RicoSuter]

v14.6.3