A powershell script to create a working directory for working with git work trees

Git-CloneForWorktrees.ps1

# Create a git worktree base folder for a repository
#
# Based on: https://morgan.cugerone.com/blog/workarounds-to-git-worktree-using-bare-repository-and-cannot-fetch-remote-branches/
#
# This script will clone a repository as a bare repository into the
# <TARGETFOLDER>/.bare directory, create a .git file and update the origin fetch
# settings so that we can fetch remote branches.

[CmdletBinding()]
param (
    [Parameter(Mandatory = $true)]
    [string]$repositoryUrl,
    [string]$targetFolder = $null
)

# Examples of call:
# Git-CloneForWorktrees git@github.com:name/repo.git
# => Clones to a /repo directory
#
# Git-CloneForWorktrees git@github.com:name/repo.git my-repo
# => Clones to a /my-repo directory

if ($targetFolder -eq $null) {
    $targetFolder = $repositoryUrl.Split("/")[-1].Replace(".git", "")
}

if (![System.IO.Path]::IsPathRooted($targetFolder)) {
    $targetFolder = Join-Path $PWD $targetFolder
}

if (Test-Path $targetFolder) {
    Write-Output "Folder $targetFolder already exists. Exiting."
    exit
}

Create-Item -Path $targetFolder -ItemType Directory | Out-Null

# Clone the repository as a bare repository
Set-Location $targetFolder
git clone --bare $repositoryUrl .bare

Set-Content -Path .git -Value "gitdir: .bare"

# Update the fetch settings
git config remote.origin.fetch "+refs/heads/*:refs/remotes/origin/*"

# Fetch the remote branches
git fetch origin