Add php-project-etags-file and php-project-apply-local-variables

[zonuexe]

Motivation

If you are developing multiple projects on a daily basis, managing TAGS files is cumbersome. This system realizes the application of TAGS files automatically by per project setting (.dir-locals.el) or automatic detection mechanism.

How to use

The following .dir-locals.el code sets the TAGS file for each project.

((nil (php-project-root . git)
      (php-project-etags-file . (root . "TAGS")))

or

((nil (php-project-root . git)
      (php-project-etags-file . t))

Apply automatic settings without a configuration file

(custom-set-variables
 '(php-project-auto-detect-etags-file tl))

How to disable this mechanism

(custom-set-variables
 '(php-mode-enable-project-local-variable nil))