git_commit_show command for Sublime Text

GitCommitShow.py

import sublime
from git import GitWindowCommand, plugin_file

class GitCommitShowCommand(GitWindowCommand):
    def run(self):
        if self.active_view() != None:
            sha1 = self.active_view().substr(self.active_view().sel()[0])
            if sha1 != "":
                self.git_commit_show(sha1)
            else:
                self.git_commit_show_with_input_panel()
        else:
            self.git_commit_show_with_input_panel()

    def git_commit_show_with_input_panel(self):
        def on_done(result):
            self.git_commit_show(result)
        self.window.show_input_panel('sha1', '', on_done, None, None)
        

    def git_commit_show(self, sha1):
        def on_done(result, position=None):
            self.scratch(result, title="Git Commit Details", position=position,
                    syntax=plugin_file("syntax/Git Commit Message.tmLanguage"))
        self.run_command(['git', 'show', sha1], on_done)