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<# | ||
.Synopsis | ||
Activate a Python virtual environment for the current PowerShell session. | ||
.Description | ||
Pushes the python executable for a virtual environment to the front of the | ||
$Env:PATH environment variable and sets the prompt to signify that you are | ||
in a Python virtual environment. Makes use of the command line switches as | ||
well as the `pyvenv.cfg` file values present in the virtual environment. | ||
.Parameter VenvDir | ||
Path to the directory that contains the virtual environment to activate. The | ||
default value for this is the parent of the directory that the Activate.ps1 | ||
script is located within. | ||
.Parameter Prompt | ||
The prompt prefix to display when this virtual environment is activated. By | ||
default, this prompt is the name of the virtual environment folder (VenvDir) | ||
surrounded by parentheses and followed by a single space (ie. '(.venv) '). | ||
.Example | ||
Activate.ps1 | ||
Activates the Python virtual environment that contains the Activate.ps1 script. | ||
.Example | ||
Activate.ps1 -Verbose | ||
Activates the Python virtual environment that contains the Activate.ps1 script, | ||
and shows extra information about the activation as it executes. | ||
.Example | ||
Activate.ps1 -VenvDir C:\Users\MyUser\Common\.venv | ||
Activates the Python virtual environment located in the specified location. | ||
.Example | ||
Activate.ps1 -Prompt "MyPython" | ||
Activates the Python virtual environment that contains the Activate.ps1 script, | ||
and prefixes the current prompt with the specified string (surrounded in | ||
parentheses) while the virtual environment is active. | ||
.Notes | ||
On Windows, it may be required to enable this Activate.ps1 script by setting the | ||
execution policy for the user. You can do this by issuing the following PowerShell | ||
command: | ||
PS C:\> Set-ExecutionPolicy -ExecutionPolicy RemoteSigned -Scope CurrentUser | ||
For more information on Execution Policies: | ||
https://go.microsoft.com/fwlink/?LinkID=135170 | ||
#> | ||
Param( | ||
[Parameter(Mandatory = $false)] | ||
[String] | ||
$VenvDir, | ||
[Parameter(Mandatory = $false)] | ||
[String] | ||
$Prompt | ||
) | ||
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<# Function declarations --------------------------------------------------- #> | ||
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<# | ||
.Synopsis | ||
Remove all shell session elements added by the Activate script, including the | ||
addition of the virtual environment's Python executable from the beginning of | ||
the PATH variable. | ||
.Parameter NonDestructive | ||
If present, do not remove this function from the global namespace for the | ||
session. | ||
#> | ||
function global:deactivate ([switch]$NonDestructive) { | ||
# Revert to original values | ||
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# The prior prompt: | ||
if (Test-Path -Path Function:_OLD_VIRTUAL_PROMPT) { | ||
Copy-Item -Path Function:_OLD_VIRTUAL_PROMPT -Destination Function:prompt | ||
Remove-Item -Path Function:_OLD_VIRTUAL_PROMPT | ||
} | ||
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# The prior PYTHONHOME: | ||
if (Test-Path -Path Env:_OLD_VIRTUAL_PYTHONHOME) { | ||
Copy-Item -Path Env:_OLD_VIRTUAL_PYTHONHOME -Destination Env:PYTHONHOME | ||
Remove-Item -Path Env:_OLD_VIRTUAL_PYTHONHOME | ||
} | ||
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# The prior PATH: | ||
if (Test-Path -Path Env:_OLD_VIRTUAL_PATH) { | ||
Copy-Item -Path Env:_OLD_VIRTUAL_PATH -Destination Env:PATH | ||
Remove-Item -Path Env:_OLD_VIRTUAL_PATH | ||
} | ||
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# Just remove the VIRTUAL_ENV altogether: | ||
if (Test-Path -Path Env:VIRTUAL_ENV) { | ||
Remove-Item -Path env:VIRTUAL_ENV | ||
} | ||
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# Just remove VIRTUAL_ENV_PROMPT altogether. | ||
if (Test-Path -Path Env:VIRTUAL_ENV_PROMPT) { | ||
Remove-Item -Path env:VIRTUAL_ENV_PROMPT | ||
} | ||
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# Just remove the _PYTHON_VENV_PROMPT_PREFIX altogether: | ||
if (Get-Variable -Name "_PYTHON_VENV_PROMPT_PREFIX" -ErrorAction SilentlyContinue) { | ||
Remove-Variable -Name _PYTHON_VENV_PROMPT_PREFIX -Scope Global -Force | ||
} | ||
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# Leave deactivate function in the global namespace if requested: | ||
if (-not $NonDestructive) { | ||
Remove-Item -Path function:deactivate | ||
} | ||
} | ||
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<# | ||
.Description | ||
Get-PyVenvConfig parses the values from the pyvenv.cfg file located in the | ||
given folder, and returns them in a map. | ||
For each line in the pyvenv.cfg file, if that line can be parsed into exactly | ||
two strings separated by `=` (with any amount of whitespace surrounding the =) | ||
then it is considered a `key = value` line. The left hand string is the key, | ||
the right hand is the value. | ||
If the value starts with a `'` or a `"` then the first and last character is | ||
stripped from the value before being captured. | ||
.Parameter ConfigDir | ||
Path to the directory that contains the `pyvenv.cfg` file. | ||
#> | ||
function Get-PyVenvConfig( | ||
[String] | ||
$ConfigDir | ||
) { | ||
Write-Verbose "Given ConfigDir=$ConfigDir, obtain values in pyvenv.cfg" | ||
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# Ensure the file exists, and issue a warning if it doesn't (but still allow the function to continue). | ||
$pyvenvConfigPath = Join-Path -Resolve -Path $ConfigDir -ChildPath 'pyvenv.cfg' -ErrorAction Continue | ||
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# An empty map will be returned if no config file is found. | ||
$pyvenvConfig = @{ } | ||
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if ($pyvenvConfigPath) { | ||
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Write-Verbose "File exists, parse `key = value` lines" | ||
$pyvenvConfigContent = Get-Content -Path $pyvenvConfigPath | ||
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$pyvenvConfigContent | ForEach-Object { | ||
$keyval = $PSItem -split "\s*=\s*", 2 | ||
if ($keyval[0] -and $keyval[1]) { | ||
$val = $keyval[1] | ||
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# Remove extraneous quotations around a string value. | ||
if ("'""".Contains($val.Substring(0, 1))) { | ||
$val = $val.Substring(1, $val.Length - 2) | ||
} | ||
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$pyvenvConfig[$keyval[0]] = $val | ||
Write-Verbose "Adding Key: '$($keyval[0])'='$val'" | ||
} | ||
} | ||
} | ||
return $pyvenvConfig | ||
} | ||
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<# Begin Activate script --------------------------------------------------- #> | ||
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# Determine the containing directory of this script | ||
$VenvExecPath = Split-Path -Parent $MyInvocation.MyCommand.Definition | ||
$VenvExecDir = Get-Item -Path $VenvExecPath | ||
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Write-Verbose "Activation script is located in path: '$VenvExecPath'" | ||
Write-Verbose "VenvExecDir Fullname: '$($VenvExecDir.FullName)" | ||
Write-Verbose "VenvExecDir Name: '$($VenvExecDir.Name)" | ||
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# Set values required in priority: CmdLine, ConfigFile, Default | ||
# First, get the location of the virtual environment, it might not be | ||
# VenvExecDir if specified on the command line. | ||
if ($VenvDir) { | ||
Write-Verbose "VenvDir given as parameter, using '$VenvDir' to determine values" | ||
} | ||
else { | ||
Write-Verbose "VenvDir not given as a parameter, using parent directory name as VenvDir." | ||
$VenvDir = $VenvExecDir.Parent.FullName.TrimEnd("\\/") | ||
Write-Verbose "VenvDir=$VenvDir" | ||
} | ||
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# Next, read the `pyvenv.cfg` file to determine any required value such | ||
# as `prompt`. | ||
$pyvenvCfg = Get-PyVenvConfig -ConfigDir $VenvDir | ||
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# Next, set the prompt from the command line, or the config file, or | ||
# just use the name of the virtual environment folder. | ||
if ($Prompt) { | ||
Write-Verbose "Prompt specified as argument, using '$Prompt'" | ||
} | ||
else { | ||
Write-Verbose "Prompt not specified as argument to script, checking pyvenv.cfg value" | ||
if ($pyvenvCfg -and $pyvenvCfg['prompt']) { | ||
Write-Verbose " Setting based on value in pyvenv.cfg='$($pyvenvCfg['prompt'])'" | ||
$Prompt = $pyvenvCfg['prompt']; | ||
} | ||
else { | ||
Write-Verbose " Setting prompt based on parent's directory's name. (Is the directory name passed to venv module when creating the virtual environment)" | ||
Write-Verbose " Got leaf-name of $VenvDir='$(Split-Path -Path $venvDir -Leaf)'" | ||
$Prompt = Split-Path -Path $venvDir -Leaf | ||
} | ||
} | ||
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Write-Verbose "Prompt = '$Prompt'" | ||
Write-Verbose "VenvDir='$VenvDir'" | ||
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# Deactivate any currently active virtual environment, but leave the | ||
# deactivate function in place. | ||
deactivate -nondestructive | ||
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# Now set the environment variable VIRTUAL_ENV, used by many tools to determine | ||
# that there is an activated venv. | ||
$env:VIRTUAL_ENV = $VenvDir | ||
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if (-not $Env:VIRTUAL_ENV_DISABLE_PROMPT) { | ||
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Write-Verbose "Setting prompt to '$Prompt'" | ||
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# Set the prompt to include the env name | ||
# Make sure _OLD_VIRTUAL_PROMPT is global | ||
function global:_OLD_VIRTUAL_PROMPT { "" } | ||
Copy-Item -Path function:prompt -Destination function:_OLD_VIRTUAL_PROMPT | ||
New-Variable -Name _PYTHON_VENV_PROMPT_PREFIX -Description "Python virtual environment prompt prefix" -Scope Global -Option ReadOnly -Visibility Public -Value $Prompt | ||
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function global:prompt { | ||
Write-Host -NoNewline -ForegroundColor Green "($_PYTHON_VENV_PROMPT_PREFIX) " | ||
_OLD_VIRTUAL_PROMPT | ||
} | ||
$env:VIRTUAL_ENV_PROMPT = $Prompt | ||
} | ||
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# Clear PYTHONHOME | ||
if (Test-Path -Path Env:PYTHONHOME) { | ||
Copy-Item -Path Env:PYTHONHOME -Destination Env:_OLD_VIRTUAL_PYTHONHOME | ||
Remove-Item -Path Env:PYTHONHOME | ||
} | ||
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# Add the venv to the PATH | ||
Copy-Item -Path Env:PATH -Destination Env:_OLD_VIRTUAL_PATH | ||
$Env:PATH = "$VenvExecDir$([System.IO.Path]::PathSeparator)$Env:PATH" |
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# This file must be used with "source bin/activate" *from bash* | ||
# you cannot run it directly | ||
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deactivate () { | ||
# reset old environment variables | ||
if [ -n "${_OLD_VIRTUAL_PATH:-}" ] ; then | ||
PATH="${_OLD_VIRTUAL_PATH:-}" | ||
export PATH | ||
unset _OLD_VIRTUAL_PATH | ||
fi | ||
if [ -n "${_OLD_VIRTUAL_PYTHONHOME:-}" ] ; then | ||
PYTHONHOME="${_OLD_VIRTUAL_PYTHONHOME:-}" | ||
export PYTHONHOME | ||
unset _OLD_VIRTUAL_PYTHONHOME | ||
fi | ||
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# This should detect bash and zsh, which have a hash command that must | ||
# be called to get it to forget past commands. Without forgetting | ||
# past commands the $PATH changes we made may not be respected | ||
if [ -n "${BASH:-}" -o -n "${ZSH_VERSION:-}" ] ; then | ||
hash -r 2> /dev/null | ||
fi | ||
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if [ -n "${_OLD_VIRTUAL_PS1:-}" ] ; then | ||
PS1="${_OLD_VIRTUAL_PS1:-}" | ||
export PS1 | ||
unset _OLD_VIRTUAL_PS1 | ||
fi | ||
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unset VIRTUAL_ENV | ||
unset VIRTUAL_ENV_PROMPT | ||
if [ ! "${1:-}" = "nondestructive" ] ; then | ||
# Self destruct! | ||
unset -f deactivate | ||
fi | ||
} | ||
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# unset irrelevant variables | ||
deactivate nondestructive | ||
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VIRTUAL_ENV="/home/edewata/Projects/pki/.venv" | ||
export VIRTUAL_ENV | ||
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_OLD_VIRTUAL_PATH="$PATH" | ||
PATH="$VIRTUAL_ENV/bin:$PATH" | ||
export PATH | ||
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# unset PYTHONHOME if set | ||
# this will fail if PYTHONHOME is set to the empty string (which is bad anyway) | ||
# could use `if (set -u; : $PYTHONHOME) ;` in bash | ||
if [ -n "${PYTHONHOME:-}" ] ; then | ||
_OLD_VIRTUAL_PYTHONHOME="${PYTHONHOME:-}" | ||
unset PYTHONHOME | ||
fi | ||
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if [ -z "${VIRTUAL_ENV_DISABLE_PROMPT:-}" ] ; then | ||
_OLD_VIRTUAL_PS1="${PS1:-}" | ||
PS1="(.venv) ${PS1:-}" | ||
export PS1 | ||
VIRTUAL_ENV_PROMPT="(.venv) " | ||
export VIRTUAL_ENV_PROMPT | ||
fi | ||
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# This should detect bash and zsh, which have a hash command that must | ||
# be called to get it to forget past commands. Without forgetting | ||
# past commands the $PATH changes we made may not be respected | ||
if [ -n "${BASH:-}" -o -n "${ZSH_VERSION:-}" ] ; then | ||
hash -r 2> /dev/null | ||
fi |
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# This file must be used with "source bin/activate.csh" *from csh*. | ||
# You cannot run it directly. | ||
# Created by Davide Di Blasi <[email protected]>. | ||
# Ported to Python 3.3 venv by Andrew Svetlov <[email protected]> | ||
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alias deactivate 'test $?_OLD_VIRTUAL_PATH != 0 && setenv PATH "$_OLD_VIRTUAL_PATH" && unset _OLD_VIRTUAL_PATH; rehash; test $?_OLD_VIRTUAL_PROMPT != 0 && set prompt="$_OLD_VIRTUAL_PROMPT" && unset _OLD_VIRTUAL_PROMPT; unsetenv VIRTUAL_ENV; unsetenv VIRTUAL_ENV_PROMPT; test "\!:*" != "nondestructive" && unalias deactivate' | ||
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# Unset irrelevant variables. | ||
deactivate nondestructive | ||
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setenv VIRTUAL_ENV "/home/edewata/Projects/pki/.venv" | ||
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set _OLD_VIRTUAL_PATH="$PATH" | ||
setenv PATH "$VIRTUAL_ENV/bin:$PATH" | ||
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set _OLD_VIRTUAL_PROMPT="$prompt" | ||
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if (! "$?VIRTUAL_ENV_DISABLE_PROMPT") then | ||
set prompt = "(.venv) $prompt" | ||
setenv VIRTUAL_ENV_PROMPT "(.venv) " | ||
endif | ||
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alias pydoc python -m pydoc | ||
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rehash |
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