New-Branch

Creates a new Git branch

Script

param([string]$newBranch = "", [string]$path = "$PWD")

try {
	if ($newBranch -eq "") { $newBranch = Read-Host "Enter the new Git branch name" }

	$stopWatch = [system.diagnostics.stopwatch]::startNew()

	Write-Host "? (1/6) Searching for Git executable...  " -noNewline
	& git --version
	if ($lastExitCode -ne 0) { throw "Can't execute 'git' - make sure Git is installed and available" }

	Write-Host "? (2/6) Checking local repository...     $path"
	if (-not(Test-Path "$path" -pathType container)) { throw "Can't access repo folder: $path" }
	$result = (git -C "$path" status)
        if ($lastExitCode -ne 0) { throw "'git status' in $path failed with exit code $lastExitCode" }
	$repoName = (Get-Item "$path").Name

	Write-Host "? (3/6) Fetching remote updates...       " -noNewline
	& git -C "$path" remote get-url origin
        if ($lastExitCode -ne 0) { throw "'git remote get-url origin' failed with exit code $lastExitCode" }

	& git -C "$path" fetch --all --recurse-submodules --prune --prune-tags --force
	if ($lastExitCode -ne 0) { throw "'git fetch' failed with exit code $lastExitCode" }

	$currentBranch = (git -C "$path" rev-parse --abbrev-ref HEAD)
	if ($lastExitCode -ne 0) { throw "'git rev-parse' failed with exit code $lastExitCode" }

	"? (4/6) Creating new branch..."
	& git -C "$path" checkout -b "$newBranch"
	if ($lastExitCode -ne 0) { throw "'git checkout -b $newBranch' failed with exit code $lastExitCode" }

	"? (5/6) Pushing updates..."
	& git -C "$path" push origin "$newBranch"
	if ($lastExitCode -ne 0) { throw "'git push origin $newBranch' failed with exit code $lastExitCode" }

	"? (6/6) Updating submodules..."
	& git -C "$path" submodule update --init --recursive
	if ($lastExitCode -ne 0) { throw "'git submodule update' failed with exit code $lastExitCode" }

	[int]$elapsed = $stopWatch.Elapsed.TotalSeconds
	"? Repo '$repoName' on new branch '$newBranch' (based on '$currentBranch', took $($elapsed)s)."
	exit 0 # success
} catch {
	"?? ERROR: $($Error[0]) (script line $($_.InvocationInfo.ScriptLineNumber))"
	exit 1
}

Customize

newBranch string

Specifies the new branch name

path string

Specifies the file path to the local Git repository (current working directory by default)