Get the name of the current git branch with PowerShell

Question

I would like to be able to do git commands from a PowerShell script which is not located in the same folder as my git repo.

First I want to check the current branch, and if it's not master try to checkout master and pull master.

What I've done so far:

function Get-ScriptDirectory {
    Split-Path $script:MyInvocation.MyCommand.Path
}

$currentPath = Get-ScriptDirectory
[string]$Path_GIT = "C:\Program Files\Git\git-cmd.exe"
$gitRepo = $currentPath + "\..\"
$nameCurrentBranch = & $Path_GIT git -C "$gitRepo" rev-parse --abbrev-ref HEAD

From the documentation here and the answers to this question.

$gitRepo contains the path of the folder containing the git repo.

I get the error:

git-cmd.exe : fatal: Cannot change to 'C:\Users\MyName\Documents\Projects\MyProject\
Batchs\.." rev-parse --abbrev-ref HEAD': Invalid argument
At C:\Users\MyName\Documents\Projects\MyProject\Batchs\Publish.ps1:64 char:22
+ ... entBranch = & $Path_GIT git -C "$gitRepo" rev-parse --abbrev-ref HEAD ...
+                 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
    + CategoryInfo          : NotSpecified: (fatal: Cannot c...nvalid argument:String) [], RemoteException
    + FullyQualifiedErrorId : NativeCommandError

EDIT: New problem after the proposition of @4c74356b41 (using Join-Path): I don't have any error a popup opens and close really fast and then my powershell script is stuck, as if it was waiting for the git-cmd.exe to close. But I can't see the windows of the cmd git and can't close it.

Answer 1

CD Your repository folder

$branch= &git rev-parse --abbrev-ref HEAD 

from Show just the current branch in Git

Answer 2

Try Join-Path

$gitRepo = Join-Path $currentPath ".." -Resolve