Old engine for Continuous Time Bayesian Networks. Superseded by reCTBN. 🐍
https://github.com/madlabunimib/PyCTBN
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
241 lines
8.6 KiB
241 lines
8.6 KiB
<#
|
|
.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]
|
|
$Prompt
|
|
)
|
|
|
|
<# Function declarations --------------------------------------------------- #>
|
|
|
|
<#
|
|
.Synopsis
|
|
Remove all shell session elements added by the Activate script, including the
|
|
addition of the virtual environment's Python executable from the beginning of
|
|
the PATH variable.
|
|
|
|
.Parameter NonDestructive
|
|
If present, do not remove this function from the global namespace for the
|
|
session.
|
|
|
|
#>
|
|
function global:deactivate ([switch]$NonDestructive) {
|
|
# Revert to original values
|
|
|
|
# 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
|
|
}
|
|
|
|
# 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
|
|
}
|
|
|
|
# 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
|
|
}
|
|
|
|
# Just remove the VIRTUAL_ENV altogether:
|
|
if (Test-Path -Path Env:VIRTUAL_ENV) {
|
|
Remove-Item -Path env:VIRTUAL_ENV
|
|
}
|
|
|
|
# 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
|
|
}
|
|
|
|
# Leave deactivate function in the global namespace if requested:
|
|
if (-not $NonDestructive) {
|
|
Remove-Item -Path function:deactivate
|
|
}
|
|
}
|
|
|
|
<#
|
|
.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"
|
|
|
|
# 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
|
|
|
|
# An empty map will be returned if no config file is found.
|
|
$pyvenvConfig = @{ }
|
|
|
|
if ($pyvenvConfigPath) {
|
|
|
|
Write-Verbose "File exists, parse `key = value` lines"
|
|
$pyvenvConfigContent = Get-Content -Path $pyvenvConfigPath
|
|
|
|
$pyvenvConfigContent | ForEach-Object {
|
|
$keyval = $PSItem -split "\s*=\s*", 2
|
|
if ($keyval[0] -and $keyval[1]) {
|
|
$val = $keyval[1]
|
|
|
|
# Remove extraneous quotations around a string value.
|
|
if ("'""".Contains($val.Substring(0, 1))) {
|
|
$val = $val.Substring(1, $val.Length - 2)
|
|
}
|
|
|
|
$pyvenvConfig[$keyval[0]] = $val
|
|
Write-Verbose "Adding Key: '$($keyval[0])'='$val'"
|
|
}
|
|
}
|
|
}
|
|
return $pyvenvConfig
|
|
}
|
|
|
|
|
|
<# Begin Activate script --------------------------------------------------- #>
|
|
|
|
# Determine the containing directory of this script
|
|
$VenvExecPath = Split-Path -Parent $MyInvocation.MyCommand.Definition
|
|
$VenvExecDir = Get-Item -Path $VenvExecPath
|
|
|
|
Write-Verbose "Activation script is located in path: '$VenvExecPath'"
|
|
Write-Verbose "VenvExecDir Fullname: '$($VenvExecDir.FullName)"
|
|
Write-Verbose "VenvExecDir Name: '$($VenvExecDir.Name)"
|
|
|
|
# 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"
|
|
}
|
|
|
|
# Next, read the `pyvenv.cfg` file to determine any required value such
|
|
# as `prompt`.
|
|
$pyvenvCfg = Get-PyVenvConfig -ConfigDir $VenvDir
|
|
|
|
# Next, set the prompt from the command line, or the config file, or
|
|
# just use the name of the virtual environment folder.
|
|
if ($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 virutal environment)"
|
|
Write-Verbose " Got leaf-name of $VenvDir='$(Split-Path -Path $venvDir -Leaf)'"
|
|
$Prompt = Split-Path -Path $venvDir -Leaf
|
|
}
|
|
}
|
|
|
|
Write-Verbose "Prompt = '$Prompt'"
|
|
Write-Verbose "VenvDir='$VenvDir'"
|
|
|
|
# Deactivate any currently active virtual environment, but leave the
|
|
# deactivate function in place.
|
|
deactivate -nondestructive
|
|
|
|
# Now set the environment variable VIRTUAL_ENV, used by many tools to determine
|
|
# that there is an activated venv.
|
|
$env:VIRTUAL_ENV = $VenvDir
|
|
|
|
if (-not $Env:VIRTUAL_ENV_DISABLE_PROMPT) {
|
|
|
|
Write-Verbose "Setting prompt to '$Prompt'"
|
|
|
|
# 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 $Prompt
|
|
|
|
function global:prompt {
|
|
Write-Host -NoNewline -ForegroundColor Green "($_PYTHON_VENV_PROMPT_PREFIX) "
|
|
_OLD_VIRTUAL_PROMPT
|
|
}
|
|
}
|
|
|
|
# Clear PYTHONHOME
|
|
if (Test-Path -Path Env:PYTHONHOME) {
|
|
Copy-Item -Path Env:PYTHONHOME -Destination Env:_OLD_VIRTUAL_PYTHONHOME
|
|
Remove-Item -Path Env:PYTHONHOME
|
|
}
|
|
|
|
# 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"
|
|
|