gitSparseCheckout.ps1

<#
.SYNOPSIS
    Perform Git sparse checkout programmatically.

.DESCRIPTION
    This script performs a sparse checkout of a Git repository, allowing you to clone only specific subfolders instead of the entire repository.
    It uses the `git sparse-checkout` command to specify which subfolders to include in the local clone.

.PARAMETER repoUrl
    Mandatory parameter; it is the repository URL that will be `git clone`d.

.PARAMETER subfolderList
    Mandatory parameter; it is an array of all the paths that should be checked out. Other paths will be ignored in local clone.

.EXAMPLE
    Use like this: .\gitSparseCheckout.ps1 -repoUrl "https://github.com/cirosantilli/test-git-partial-clone-big-small-no-bigtree" -subfolderList "path1", "path2", "path3/subpath3"

.NOTES
    Do not run this script from Git Bash, use PowerShell instead.
    Othewise, .git/info/sparse-checkout will not be created correctly.
    If you want to manually tweak the sparse checkout policy, proceed like this
    (Bash syntax)
        echo "/<CHOSEN_FOLDER_1>/" > .git/info/sparse-checkout
        echo "/<CHOSEN_FOLDER_2>/" >> .git/info/sparse-checkout
        git checkout
        git read-tree -mu HEAD
    (PowerShell syntax)
        "/<CHOSEN_FOLDER_1>/" | Set-Content .git/info/sparse-checkout
        "/<CHOSEN_FOLDER_1>/" | Add-Content .git/info/sparse-checkout
        git checkout
        git read-tree -mu HEAD

    Credit: https://stackoverflow.com/a/52269934

#>

param (
    [Parameter(Mandatory = $true)]
    [string]$repoUrl,

    [Parameter(Mandatory = $true)]
    [string[]]$subfolderList
)

$repoUrl = $repoUrl.Replace('\', '/')

$origWorkDir = Get-Location

git clone -n --depth=1 --filter=tree:0 $repoUrl
$repoName = Split-Path -Leaf $repoUrl
Set-Location $repoName
$sparseCheckoutCmd = "git sparse-checkout set --no-cone"
for ($idx = 0; $idx -lt $subfolderList.Length; $idx++) {
    $subfolderList[$idx] = $subfolderList[$idx].Replace('\', '/')
    $subfolderList = $subfolderList.Trim('/')
    $sparseCheckoutCmd += " /$($subfolderList[$idx])/"
}
Invoke-Expression $sparseCheckoutCmd
git checkout
Set-Location $origWorkDir