Lightweight git autocompletion.

git-complete.ps1

# Basic Autocompleter for git
# Covers most usecases
Register-ArgumentCompleter -CommandName "git" -Native -ScriptBlock {
	param($wordToComplete, $commandAst, $cursorPosition)
	$cmd = $commandAst.ToString() -split " "
	# order is based on "popularity"
	$supportedCommands = @("checkout", "add", "commit", "branch", "status", "pull", "push", "merge", "log", "stash")
	$comps = @()
	
	if ($cmd.Length -eq 1 -or $supportedCommands -inotcontains $cmd[1]) {
		$comps = $supportedCommands
	}
	else {
		$comps = switch ($cmd[1]) {
			"checkout" { @("-") + @(git branch --format='%(refname:short)' --sort=-committerdate) }
			"add" { @(".") }
			"commit" { @("-m") } 
			"branch" { @("-b", "-D") + @(git branch --format='%(refname:short)' --sort=-committerdate) }
			"merge" { @(git branch --format='%(refname:short)' --sort=-committerdate) } 
			"log" { @("--oneline") }
		} 
	}

	$comps | Where-Object { $_ -like "$wordToComplete*" }
}