Allow Import-BuildStep to point to external ps1 file

[bjompen]

I would like to have my GitHubAction.ps1 files in other locations than required by the Import-BuildStep command, but it doesn't seem to work.
My folder structure is similar to this:

• /Source/ModuleFiles.(psm1, psd1, private, public, etc.)
• /GitHub/Action/GitHubAction.ps1
• /Tests and other stuff.. not relevant

This results in the following scenarios:

• if I import the module from manifest file it can't find the MyAction.ps1 (makes sense), but imports the commands in the module.
• If I use -SourcePath c:\Path\To\Folder\GitHubAction\ -BuildSystem GitHubAction it quietly continues, even with -Verbose, but no action is loaded
• If I use only -SourcePath c:\Path\To\Folder\GitHubAction\ (which as a parameter name would make sense to me) I get the following error
  

I would like to be able to do something similar to

Import-BuildStep -ScriptFile '/path/to/my/file.ps1' -BuildStepName 'MyBuildStep'

This would allow me to have centralized build steps that I can import and reuse, and store them wherever I want. Is this possible? If so, how? I may help by updating the documentation but as I can't figure this out myself.. well..