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bug#21443: 24.5; etags' complete-tag changes the global value of tags-fi
From: |
Eli Zaretskii |
Subject: |
bug#21443: 24.5; etags' complete-tag changes the global value of tags-file-name |
Date: |
Thu, 10 Sep 2015 22:06:03 +0300 |
> From: HuangMario <guiyang.huang@me.com>
> Date: Wed, 09 Sep 2015 21:18:04 +0800
>
> Step 0. Set the 'tags-file-name' as buffer local to a specified TAGS file,
> and the global value is nil.
>
> Step 1. Press M-. to find tags.
>
> Step 2. Input some characters in the mini-buffer and press the TAB key for
> completion, then the mini-buffer will display "Making tags completion table
> for ...done".
>
> After that, the global value of 'tags-file-name' is set to the same as its
> local value.
>
> How can I keep the global value nil ?
According to this doc string:
(defun visit-tags-table (file &optional local)
"Tell tags commands to use tags table file FILE.
FILE should be the name of a file created with the `etags' program.
A directory name is ok too; it means file TAGS in that directory.
Normally \\[visit-tags-table] sets the global value of `tags-file-name'.
With a prefix arg, set the buffer-local value instead.
you are supposed to invoke visit-tags-table manually with a numeric
argument, if you want the local value of tags-file-name set.