PowerShell アレコレ

PowerShell ヨクワカランって感じだったので色々まとめた

macOS への PowerShell の導入

macOS からも PowerShell が使える。物好きな方はどうぞ。というかこういうことできるのはやっぱり .NET Core にコードを寄せているからなのか？（これはいいこと）。

brew cask install powersh
$ pwsh
PowerShell v6.0.2
Copyright (c) Microsoft Corporation. All rights reserved.

https://aka.ms/pscore6-docs
Type 'help' to get help.

PS /Users/maintainer> Get-Host

Name             : ConsoleHost
Version          : 6.0.2
...
DebuggerEnabled  : True
IsRunspacePushed : False
Runspace         : System.Management.Automation.Runspaces.LocalRunspace

PowerShell と PowerShell Core

Although this repo started as a fork of the Windows PowerShell code base, changes made in this repo do not make their way back to Windows PowerShell 5.1 automatically. This also means that issues tracked here are only for PowerShell Core 6.0. Windows PowerShell specific issues should be opened on UserVoice. (Windows PowerShell vs PowerShell Core)

6.0 以降を PowerShell Core とよんでいる模様

Console Host と ISE の違い

便利なコマンド

オブジェクトの中身を全部吐き出す

gm or Get-Member でメンバ一覧を表示できる

PS /Users/maintainer> $error | gm


   TypeName: System.Management.Automation.ErrorRecord

Name                  MemberType     Definition
----                  ----------     ----------
Equals                Method         bool Equals(System.Object obj)
GetHashCode           Method         int GetHashCode()
...
GetObjectData         Method         void GetObjectData(System.Runtime.Serialization.SerializationInfo info, PSMessageDetails      ScriptProperty System.Object PSMessageDetails {get=& { Set-StrictMode -Version 1; $this.Exception.InnerException.PSMessageDetails };}

json にして吐き出す

PS /Users/maintainer> $error | ConvertTo-Json
[
  {
    "Exception": {
      "ErrorRecord": "The term 'Convert-ToJson' is not recognized as the name of a cmdlet, function, script file, or operable program.\nCheck the spelling of the name, or if a path was included, verify that the path is correct and try again.",
      ...
    "PipelineIterationInfo": [],
    "PSMessageDetails": null
  }
]

Preference_Variables

便利な変数: about_Preference_Variables