Powershell Prompt Double Execution

[lzybkr]

From @whatevergeek on August 18, 2016 18:44

Version: powershell_6.0.0-alpha.9-1ubuntu1.14.04.1_amd64.deb
Platform: Ubuntu 14.04

Steps to reproduce

1. Modify $profile file and add the following function inside
   function prompt
   {
   Write-Host ("This>")
   return " "
   }
2. Exit and re-enter powershell
3. Check the commandline prompt

Expected behavior

It should only print "This>" once.

Actual behavior

It prints "This>" twice.

Environment data

> $PSVersionTable
Name                           Value                                                                 
----                           -----                                                                 
PSVersion                      6.0.0-alpha                                                           
PSEdition                      Core                                                                  
PSCompatibleVersions           {1.0, 2.0, 3.0, 4.0...}                                               
BuildVersion                   3.0.0.0                                                               
GitCommitId                    v6.0.0-alpha.9                                                        
CLRVersion                                                                                           
WSManStackVersion              3.0                                                                   
PSRemotingProtocolVersion      2.3                                                                   
SerializationVersion           1.1.0.1       

Copied from original issue: PowerShell/PowerShell#1897

[lzybkr]

From @lukemgriffith on August 18, 2016 23:11

I'm also seeing the same on MacOS 10.11.6

PS /Users/luke/Downloads> $IsOSX                                                                                                                                                   
True
PS /Users/luke/Downloads> $PSVersionTable                                                                                                                                          

Name                           Value                                                                                                                                              
----                           -----                                                                                                                                              
PSVersion                      6.0.0-alpha                                                                                                                                        
PSEdition                      Core                                                                                                                                               
PSCompatibleVersions           {1.0, 2.0, 3.0, 4.0...}                                                                                                                            
BuildVersion                   3.0.0.0                                                                                                                                            
GitCommitId                    v6.0.0-alpha.9                                                                                                                                     
CLRVersion                                                                                                                                                                        
WSManStackVersion              3.0                                                                                                                                                
PSRemotingProtocolVersion      2.3                                                                                                                                                
SerializationVersion           1.1.0.1  


$VerbosePreference = "Continue"

function prompt {

  Write-Verbose "Test"

}

I see the verbose "Test" twice.

[lzybkr]

From @Jaykul on August 18, 2016 23:38

Ditto for Ubuntu 16.04

I had to stop using Write-Host ... now using escape sequences for color ;-)

[lzybkr]

From @myyc on August 20, 2016 10:50

@Jaykul can you share details? it seems ANSI escape sequences aren't supported out of the box

[lzybkr]

From @whatevergeek on August 20, 2016 11:21

@myyc which details you need?
my hunch is that whatever posted by write-host
gets posted twice

i'm still in the process of getting the source built on my machine... will try to help also once i get the setup done :-)

[lzybkr]

From @myyc on August 20, 2016 11:26

@whatevergeek details on how to use escape sequences instead of write-host ...

[lzybkr]

From @theaquamarine on August 22, 2016 22:45

@myyc there's a bit of an example here dahlbyk/posh-git#282 (comment)

[lzybkr]

From @Jaykul on August 23, 2016 0:5

Oh, I'm sorry, I didn't mean to leave you hanging. Here's what I have so far, it works on Windows 10 and Linux, even in VS Code ... but obviously not anywhere that ANSI escape sequences don't work (e.g. ISE): http://poshcode.org/6485

[rspaulino]

@lzybkr
I try to follow your demo to get color on my prompt and when I login it work I see my color prompt but the moment I type something the escape character break.

any ideas?

---

function prompt {
return "$([char]0x1b)[91m >_ $([char]0x1b)[0m"
}

PowerShell
Copyright (C) 2016 Microsoft Corporation. All rights reserved.

_

---

PowerShell
Copyright (C) 2016 Microsoft Corporation. All rights reserved.

[91clear