如何创建在与shell相同的进程中运行的Powershell别名（或函数或cmdlet）？

Question

In Unix, I create a lot of aliases/functions. Here is my workflow:

* I have a file named 'aliases.txt' in my $HOME directory
* I have a quick command to edit that file
* I have an alias named 'sa' that sources that alias file. I.e.

  alias sa='. $HOME/aliases.txt

So I can quickly and easily create, modify, and use new aliases.

I'm trying to re-create the same work flow in Powershell and it doesn't work. I've got the aliases.ps1 file in my $HOME directory. I tried creating an 'sa' alias, but of course a Powershell alias can't contain an argument. So I've tried

function sa {. $HOME\aliases.ps1 }

I can run it but changes in my aliases.pl1 file don't get reflected in my shell session. I'm assuming it's because Windows runs the 'sa' function in a new process, while Unix runs functions and aliases in the same process. How can I get my 'sa' back?

(BTW, "Type '. $HOME\\aliases.ps1' at the command line each time" is not the answer I'm looking for.

Thanks in advance.

Answer 1

Would

. sa

be terse enough? You just need to dot-source the function call into the current scope. (Note there needs to be a space between the dot and the function name).

Answer 2

What are you trying to do? Some parts of your question doesn't make sense.

Ok, I understand better now.

Import-Alias is exactly for this purpose! Edit the file and do Import-Alias file and you get the new aliases that you have added.

---

Your flow:

Use the Set-Alias command to setup an alias and add that to your profile or just add that function to profile.

notepad $profile
(add the next in notepad)
function sa {. HOME\aliases.ps1 }

Now sa, should be available and the aliases.ps1 can be setup to use Set-Alias and add the aliases.

You are trying to map what you do in unix EXACTLY to Powershell. You should try and use what powershell has to offer:

Powershell flow:

 notepad $profile
 (in notepad)
 Set-Alias <alias> <command>

Just add Set-Alias command to your profile.

Or use Export-Alias to export into a file and add Import-Alias to import from the file in your profile.

All these are excellently explained here: http://technet.microsoft.com/en-us/library/ee692685.aspx