Switching between auto-inserts on the fly / by context

Using emacs for multiple projects from legacy to current ones, I have to use multiple conventions, e.g. for comments or file headers. For example, I use this function to insert file headers for C++ files:

(defun mg-c-file-header()
  "Inserts a c/c++ file header"
  (if (boundp 'mg-auto-insert-style)
      (case mg-auto-insert-style
    (project-a
     (insert
      " * @file "(file-name-nondirectory buffer-file-name)"\n"
      " * \n"
      " * (c) 2000 - "( format-time-string "%Y" )" by someone\n"))
    (project-b
     (insert "/** another header*/\n"))
    (otherwise (message "Meh.")))))

I call this function in this context:

(setq auto-insert-alist
      '(
        (("\\.\\([C]\\|cc\\|cpp\\)\\'" . "C++ Program")
         nil
 开发者_开发知识库        ( mg-c-file-header )
         "// --- includes --- \n"
;; and do on....

I can set mg-auto-insert-style with M-x set-variable, that's ok. But I would like to automatically set the variable depending on the path of the file for the current buffer. So if I open a buffer or visit a new file in ~/projects/project-a, mg-auto-insert-style should be project-a.

This would work, but not perfectly:

(ede-cpp-root-project "project-a"
 :file "~/projects/project-a/trunk/src/Makefile"
 :local-variables (list
   (cons 'mg-auto-insert-style 'project-a )))

If I create a new file, mg-auto-insert-style is not bound when the auto-insertion is done. Later, there's no problem...

Do you have an idea?

cu, Markus

I use auto-insert package, together with different templates to implement this. See my config as example (+ templates)

See library header2.el and this Emacs wiki page: Automatic File Headers. You can configure the headers as you like.