$MyInvocation

$MyInvocation.MyCommand.Path------->path and file name of the current script.

$MyInvocation.MyCommand.Name----->the name of a function to identity the current command.

$MyInvocation.MyCommand.Definition-->the complete path of the current script.

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原文地址：https://www.cnblogs.com/daishuguang/p/3064917.html