Update prompt environment variable when opening shell

[rfkortekaas]

• [x] I have searched the issues of this repo and believe that this is not a duplicate.
• [x] I have searched the documentation and believe that my question is not covered.

Feature Request

When running poetry shell you have no idea your in the virtualenv or not. Please add the virtualenv's name to the $PROMPT or $PS1 variable.

[clintonroy]

Please try the latest pre-release (Poetry version 1.0.0b8) that has this feature, in a working state.

[rfkortekaas]

I've tried the latest pre-release but it isn't working (on windows). Windows Cmd:

C:\Users\...\pytestproject>poetry shell
Spawning shell within C:\Users\...\Appdata\Local\pypoetry\Cache\virtualenvs\pytestproject-vJd08mD1-py3.7
Microsoft Windows [Version 10.0.18363.476]
(c) 2019 Microsoft Corporation. All rights reserved.

C:\Users\...\pytestproject>

Windows Powershell:

PS C:\Users\...\pytestproject>poetry shell
Spawning shell within C:\Users\...\Appdata\Local\pypoetry\Cache\virtualenvs\pytestproject-vJd08mD1-py3.7
Microsoft Windows [Version 10.0.18363.476]
(c) 2019 Microsoft Corporation. All rights reserved.

PS C:\Users\...\pytestproject>

Cmder

C:\Users\...\pytestproject
λ poetry shell
Spawning shell within C:\Users\...\Appdata\Local\pypoetry\Cache\virtualenvs\pytestproject-vJd08mD1-py3.7
Microsoft Windows [Version 10.0.18363.476]
(c) 2019 Microsoft Corporation. All rights reserved.

C:\Users\...\pytestproject>

Also the cmder shell is not respected; e.g. it runs windows cmd.

[wshayes]

Please try the latest pre-release (Poetry version 1.0.0b8) that has this feature, in a working state.

Worked great for me on MacOS/bash shell.

[f0ff886f]

It doesn't seem to work on Windows 1.0.0 to respect Powershell at all:

PS C:\work\ingress> poetry shell # EXECUTED FROM POWERSHELL
Spawning shell within C:\work\ingress\.venv
Microsoft Windows [Version 10.0.18362.476]
(c) 2019 Microsoft Corporation. All rights reserved.
Clink v0.4.9 [git:2fd2c2] Copyright (c) 2012-2016 Martin Ridgers
http://mridgers.github.io/clink

C:\work\ingress> # PROMPT IN CMD.EXE

using activate directly:

PS C:\work\ingress> .\.venv\Scripts\activate # EXECUTED FROM POWERSHELL
(.venv) PS C:\work\ingress> # PROMPT IN POWERSHELL

[yelled1]

This is for Cmder on Windows 10

This is supposed to be an automatic feature on Cmder in the next release. https://github.com/cmderdev/cmder/blob/master/vendor/clink.lua#L30-L36 But it has not still hit the scoop yet. Other issue is that obviously what's mentioned by @rfkortekaas I attempted to go around by an alias poet λ alias poet=poetry shell $t %ConEmuDir%\..\init.bat This did & did not ~ work

C:\Prj\FinmartDelta  
λ alias poet=poetry shell $t %ConEmuDir%\..\init.bat
C:\Prj\FinmartDelta  
λ poet
Spawning shell within C:\Users\ny11559\AppData\Local\pypoetry\Cache\virtualenvs\finmartdelta-rJ3Qparu-py3.7
name=cmd        path=cmd.exe  {i attempted to put this directly in to shell.py, but failed}
Microsoft Windows [Version 10.0.18363.778]
(c) 2019 Microsoft Corporation. All rights reserved.

C:\Prj\FinmartDelta>                         {darn same thing}
C:\Prj\FinmartDelta>                         {hit return to see if I can activate it / not}
C:\Prj\FinmartDelta>poet                  {try again}
Virtual environment already activated: C:\Users\ny11559\AppData\Local\pypoetry\Cache\virtualenvs\finmartdelta-rJ3Qparu-py3.7

C:\Prj\FinmartDelta>                         {darn same thing}
C:\Prj\FinmartDelta                           {hit return again}
[finmartdelta-rJ3Qparu-py3.7] λ           {finally got what I needed}
C:\Prj\FinmartDelta  
[finmartdelta-rJ3Qparu-py3.7] λ 

Obviously, I need to do something here C:\Users\myUser.poetry\lib\poetry\utils

 shell.py                                                                                                       buffers  
42         if cls._shell is not None:                                                                                   
43             return cls._shell                                                                                        
44                                                                                                                      
45         try:                                                                                                         
46             name, path = detect_shell(os.getpid())                                                                   
47         except (RuntimeError, ShellDetectionFailure):                                                                
48             raise RuntimeError("Unable to detect the current shell.")                                                
49                                                                                                                      
50         cls._shell = cls(name, path)                                                                                 
51                                                                                                                      
52         return cls._shell                                                                                            
53                                                                                                                      
54     def activate(self, env):  # type: (VirtualEnv) -> None                                                           
55         if WINDOWS:                                                                                                  
56             return env.execute(self.path)   

{tried adding pull path to init.bat but got another error.}

[TBBle]

I suspect this doesn't work on Windows because the logic that calls "activate" in poetry shell is bypassed on Windows, and has been since this feature was introduced in #1395.

[dedale]

I found a solution on Windows with AutoRun scripts.

You need to update registry and add a key "Autorun" REG_SZ below Computer\HKEY_CURRENT_USER\Software\Microsoft\Command Processor with the path to the script (in my case "C:\Users\ded.rc.cmd".

Sample contents for this script:

@if "%RC_CMD%"=="1" goto :skip
@cls
@prompt $p$g 
@set RC_CMD=1
:skip
@if "%POETRY_ACTIVE%"=="1" prompt poetry $p$g 

Result:

⚠️ in case of errors in this script, it will not be possible to launch a cmd anymore.

[TBBle]

I assume that only works if you're using cmd.exe as your shell?

[dedale]

I assume that only works if you're using cmd.exe as your shell?

There is a similar solution for PowerShell: https://superuser.com/a/886960/350929 I cannot tell for linux.

[TBBle]

This already works on Linux, it's only Windows where it's bypassed for some reason: https://github.com/python-poetry/poetry/issues/1642#issuecomment-753911955

[dedale]

I found a solution on Windows with AutoRun scripts.

[...]

Improved version displaying name of project: https://gist.github.com/dedale/85b603ea378caa34a397818b47ad46d9

[Manezki]

I adapted this Pipenv solution to the Poetry Powershell.

Add the following line to $profile file (e.g. by running notepad $profile in Powershell).

function prompt{
  if ($env:POETRY_ACTIVE -eq 1) {
    $poetry_env = ($env:VIRTUAL_ENV -split "\\")[-1]
    $venv = ($poetry_env -split "-")[0..(($poetry_env -split "-").Length-3)] -join "-"
    "($venv) $(Get-Location)> ";
  } else {
    "$(Get-Location)$('>' * ($nestedPromptLevel + 1))";
  }
}

I can confirm that misconfiguring above addition did not break my Powershell.

Result:

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