GetFileExtensionSyntax

GetFileExtensionSyntax.py

# Proof of concept; retrieve the path of the syntax that a user has
# associated with any file extension in Sublime Text.
#
# 1) Create a temp file with the file extension of the desired syntax.
# 2) Open the temp file in ST with the API `open_file()` method; use a
#    sublime.TRANSIENT buffer so that no tab is shown on the tab bar.
# 3) Retrieve the syntax ST has assigned to the view's settings.
# 4) Close the temp file's ST buffer.
# 5) Delete the temp file.
#
# ST command of demo: get_file_extension_syntax

import sublime, sublime_plugin
import os, tempfile

class GetFileExtensionSyntaxCommand(sublime_plugin.WindowCommand):

    def run(self):

        file_ext = ".cpp"
        syntax = self.get_file_extension_syntax(file_ext)
        print(syntax)

    def get_file_extension_syntax(self, file_ext):

        try:
            tmp_base = "GetFileExtensionSyntaxTempFile-"
            tmp_file = tempfile.NamedTemporaryFile(prefix = tmp_base,
                                                   suffix = file_ext,
                                                   delete = False)
            tmp_path = tmp_file.name
        except Exception:
            return None
        finally:
            tmp_file.close()

        active_buffer = self.window.active_view()
        # Using TRANSIENT prevents the creation of a tab bar tab.
        tmp_buffer = self.window.open_file(tmp_path, sublime.TRANSIENT)
        # Even if is_loading() is true the view's settings can be
        # retrieved; settings assigned before open_file() returns.
        syntax = tmp_buffer.settings().get("syntax", None)
        self.window.run_command("close")
        if active_buffer:
            self.window.focus_view(active_buffer)

        try:
            os.remove(tmp_path)

        # In the unlikely event of remove() failing: on Linux/OSX
        # the OS will delete the contents of /tmp on boot or daily
        # by default, on Windows the file will remain in the user
        # temporary directory (amazingly never cleaned by default).
        except Exception:
            pass

        return syntax