global !p
import vim

# Tests for the existence of a variable declared by Vim's filetype detection
# suggesting the type of shell script of the current file
def testShell(scope, shell):
	return vim.eval("exists('" + scope + ":is_" + shell + "')")

# Loops over the possible variables, checking for global variables
# first since they indicate an override by the user.
def getShell():
	for scope in ["g", "b"]:
		for shell in ["bash", "posix", "sh", "kornshell"]:
			if testShell(scope, shell) == "1":
				if shell == "kornshell":
					return "ksh"
				if shell == "posix":
					return "sh"
				return shell
	return "sh"
endglobal

snippet #!
`!p snip.rv = '#!/bin/' + getShell() + "\n\n" `
endsnippet

snippet !env "#!/usr/bin/env (!env)"
`!p snip.rv = '#!/usr/bin/env ' + getShell() + "\n\n" `
endsnippet

snippet if "If Condition" b
if [ $1  ]; then
	$0
fi
endsnippet