Today, I found my
.vimrc didn't take effect. It was ok just hours ago.
When I launched vim with
:scriptnames echoed nothing:
.vimrc file was not sourced. (Note:
/etc/vimrc was removed to debug this problem.)
Then I tried to google and found
$VIMINIT variable suspicious.
Here is the value of
$ echo $VIMINIT set number
Vim documentation about
c. Four places are searched for initializations. The first that exists is used, the others are ignored. The $MYVIMRC environment variable is set to the file that was first found, unless $MYVIMRC was already set. - The environment variable VIMINIT (see also |compatible-default|) (*) The value of $VIMINIT is used as an Ex command line. - The user vimrc file(s): "$HOME/.vimrc" (for Unix and OS/2) (*) "s:.vimrc" (for Amiga) (*) "home:.vimrc" (for Amiga) (*) "$VIM/.vimrc" (for OS/2 and Amiga) (*) "$HOME/_vimrc" (for MS-DOS and Win32) (*) "$VIM/_vimrc" (for MS-DOS and Win32) (*) Note: For Unix, OS/2 and Amiga, when ".vimrc" does not exist, "_vimrc" is also tried, in case an MS-DOS compatible file system is used. For MS-DOS and Win32 ".vimrc" is checked after "_vimrc", in case long file names are used. Note: For MS-DOS and Win32, "$HOME" is checked first. If no "_vimrc" or ".vimrc" is found there, "$VIM" is tried. See |$VIM| for when $VIM is not set. - The environment variable EXINIT. The value of $EXINIT is used as an Ex command line. - The user exrc file(s). Same as for the user vimrc file, but with "vimrc" replaced by "exrc". But only one of ".exrc" and "_exrc" is used, depending on the system. And without the (*)!
I could not understand the vim documentation fully. It seems that
$VIMINIT may mess the startup of vim.
$ VIMINIT= $ echo $VIMINIT
Problem still exist.