build haml to html with sublime - sublimetext2

Question

I want to build the haml in the sublime text 2 without switch to the iterm. So I build a simple plugin for the sublime, just like this.
import os
import sublime, sublime_plugin
class HamlToHtmlCommand(sublime_plugin.TextCommand):
def run(self,edit):
source = self.view.file_name()
filefullname = source.split('/')[-1]
filename = filefullname.split('.')[0]
target = "/".join(source.split('/')[0:-1])
com = "haml " + source + " > " + target + "/" + filename +'.html'
os.system(com)
def is_enabled(self):
return True
But the problem is that, when i build in the sublime, the target html file is empty.
for example, the "com" is "haml /Users/latpaw/login_register/login.haml /Users/latpaw/login_register/login.html". But if do the os.system(com) in the python cli, it is right.
So what really happens here

Answer 1

By the way, I really don't know Haml, so at first I just tried to fix your code. But I think you can build Haml directly from ST, by going to Tools→Build (⌥B). Or create a new build system Tools→Build Systems→New build system. Apparently you have the following variables that you could use:
$file The full path to the current file, e. g., C:\Files\Chapter1.txt.
$file_path The directory of the current file, e. g., C:\Files.
$file_name The name portion of the current file, e. g., Chapter1.txt.
$file_extension The extension portion of the current file, e. g., txt.
$file_base_name The name only portion of the current file, e. g., Document.
$packages The full path to the Packages folder.
$project The full path to the current project file.
$project_path The directory of the current project file.
$project_name The name portion of the current project file.
$project_extension The extension portion of the current project file.
$project_base_name The name only portion of the current project file.
Apparently you have an issue with path escaping. You must have, like me when I tried, a space somewhere in the path of your file. Or you probably know that commands like cat ~/Sublime Text/test do not work well. You can either:
cat ~/Sublime\ Text/test
cat ~/'Sublime Text/test'
I would advise the later and do this:
com = "haml '" + source + "' > '" + target + "/" + filename +"'.html"
PS: arguably, a better solution would be to add these single quotes directly when defining source, target and filename.