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MCM-ICM_Toolkit/scripts/setup-venv.ps1
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#Requires -Version 5.1
<#
.SYNOPSIS
Create .venv inside the repo and install mcm-toolkit in editable mode.
.DESCRIPTION
Uses --system-site-packages so the venv reuses the scientific stack already
installed in Anaconda base. That makes the whole step OFFLINE: no package is
downloaded, yet numpy / scipy / pandas / matplotlib / sklearn / statsmodels /
networkx / sympy are all importable.
The editable install uses --no-deps --no-build-isolation: dependencies are
already provided by base, and pip must not go online for a build backend.
NOTE: this file is intentionally pure ASCII and UTF-8 without BOM.
Windows PowerShell 5.1 parses .ps1 as ANSI when there is no BOM, so non-ASCII
characters (e.g. Chinese) turn into illegal bytes and cause syntax errors.
.PARAMETER Python
Interpreter used to create the venv. Default: D:\anaconda\python.exe
.PARAMETER Recreate
Delete and recreate .venv if it already exists.
.EXAMPLE
.\scripts\setup-venv.ps1
#>
[CmdletBinding()]
param(
[string]$Python = 'D:\anaconda\python.exe',
[switch]$Recreate
)
$ErrorActionPreference = 'Stop'
$repoRoot = Split-Path -Parent $PSScriptRoot
$venvDir = Join-Path $repoRoot '.venv'
if (-not (Test-Path -LiteralPath $Python)) {
$cmd = Get-Command python -ErrorAction SilentlyContinue
if (-not $cmd) { throw "Python interpreter not found: $Python" }
$Python = $cmd.Source
Write-Host "Using python from PATH: $Python" -ForegroundColor Yellow
}
if (Test-Path -LiteralPath $venvDir) {
if (-not $Recreate) {
Write-Host '.venv already exists. Use -Recreate to rebuild.' -ForegroundColor Yellow
} else {
Write-Host 'Removing existing .venv ...'
Remove-Item -LiteralPath $venvDir -Recurse -Force
}
}
if (-not (Test-Path -LiteralPath $venvDir)) {
Write-Host '[1/3] creating .venv (--system-site-packages, reuses Anaconda base) ...'
& $Python -m venv --system-site-packages --prompt 'mcm-toolkit' $venvDir
if ($LASTEXITCODE -ne 0) { throw 'venv creation failed' }
}
$venvPy = Join-Path $venvDir 'Scripts\python.exe'
Write-Host '[2/3] editable install of mcm-toolkit (--no-deps --no-build-isolation) ...'
& $venvPy -m pip install -e $repoRoot --no-deps --no-build-isolation --disable-pip-version-check
if ($LASTEXITCODE -ne 0) { throw 'pip install -e failed' }
Write-Host '[3/3] verifying ...'
& $venvPy -c "import mcm_toolkit, numpy, scipy, pandas, matplotlib; print('mcm_toolkit', mcm_toolkit.__version__); print('numpy', numpy.__version__)"
Write-Host ''
Write-Host 'Done. Activate with:' -ForegroundColor Green
Write-Host ' .\.venv\Scripts\Activate.ps1'