Add Command Line Path To Config File

[lyledean1]

• Pass "--path=path/to/file.yaml" , i.e

flutter pub run flutter_native_splash:create --path=path/to/file.yaml

• If no path specified, still goes to current defaults
• Used args.dart as a simple way to parse args to configFile function
• Feature Request on Flavor support? #160

Tested with branch by updating pubspec.yaml to

  flutter_native_splash:
    git: 
      url: https://github.com/lyledean1/flutter_native_splash
      ref: add-flavour

[lyledean1]

@jonbhanson , I will move the discussion here since it doesn't meet the requirements for the flavor feature.

Specifying a custom file path is something I currently require, so if I updated the readme to reflect this would the PR in its current state be enough to merge?

Also I could rename the "path" to "input-path" so if a flavor feature is added an output path could be added to redirect the inputs

[jonbhanson]

@lyledean1 yes, I think that would be fine. Actually, you can leave the path parameter as it is, and when the flavor feature is implemented, it can use a flavor parameter.

[lyledean1]

@lyledean1 yes, I think that would be fine. Actually, you can leave the path parameter as it is, and when the flavor feature is implemented, it can use a flavor parameter.

Thanks! I've updated the readme @jonbhanson 👍