Editing behavior of "ensure_newline_at_eof_on_save" - sublimetext2

Question

In the Preferences.sublime-settings file, a particular attribute called ensure_newline_at_eof_on_save exists and I'd like to only activate it for non-minified files. It'd be nice to pass it a regular expression like /min\.[^\.]+$/ to make it omit these files but that doesn't seem to work. Any suggestions?
EDIT
This is the contents of the trim_trailing_white_space.py file under the Default packages folder:
import sublime, sublime_plugin
class TrimTrailingWhiteSpace(sublime_plugin.EventListener):
def on_pre_save(self, view):
if view.settings().get("trim_trailing_white_space_on_save") == True:
trailing_white_space = view.find_all("[\t ]+$")
trailing_white_space.reverse()
edit = view.begin_edit()
for r in trailing_white_space:
view.erase(edit, r)
view.end_edit(edit)
class EnsureNewlineAtEof(sublime_plugin.EventListener):
def on_pre_save(self, view):
if view.settings().get("ensure_newline_at_eof_on_save") == True:
if view.size() > 0 and view.substr(view.size() - 1) != '\n':
edit = view.begin_edit()
view.insert(edit, view.size(), "\n")
view.end_edit(edit)
I have changed the second class to this implementation:
class EnsureNewlineAtEof(sublime_plugin.EventListener):
def on_pre_save(self, view):
if view.settings().get("ensure_newline_at_eof_on_save") == True:
if ".min." not in view.name():
if view.size() > 0 and view.substr(view.size() - 1) != '\n':
edit = view.begin_edit()
view.insert(edit, view.size(), "\n")
view.end_edit(edit)
But it still does not work.

Answer 1

This is actually pretty straightforward to do, and you don't even need regex to do it. Select Preferences -> Browse Packages... to open up Sublime's Packages folder in your operating system's file manager. Go into the Default folder and open trim_trailing_white_space.py in Sublime. Line 15 starts the third class definition in the file:
class EnsureNewlineAtEofCommand(sublime_plugin.TextCommand):
def run(self, edit):
if self.view.size() > 0 and self.view.substr(self.view.size() - 1) != '\n':
self.view.insert(edit, self.view.size(), "\n")
Delete the entire class (all four lines), then paste in the following:
class EnsureNewlineAtEofCommand(sublime_plugin.TextCommand):
def run(self, edit):
if ".min." not in self.view.name():
if self.view.size() > 0 and self.view.substr(self.view.size() - 1) != '\n':
self.view.insert(edit, self.view.size(), "\n")
What I did was add a test to see if the view's filename contains .min. (as in foobar.min.js or bottom.div.min.css, for example). If the filename does contain the pattern, nothing happens. If it doesn't, then a newline is added like normal.
Save the file (do not change the filename!), and restart Sublime for the changes to take effect.
Please note that the above instructions are for Sublime Text 2. ST3 does not have its packages directly available, so you'll need to install PackageResourceViewer from Package Control, select PackageResourceViewer: Open Resource from the Command Palette, then select Default and trim_trailing_white_space.py. Edit the file as above and save it, and the changes should take effect immediately, although you may wish to restart Sublime just for fun.