Search notes:
VIM: src/option.c
option.c contains code to handle user-settable
options.
vimrc_found()
vimrc_found() is called when a
.vimrc or
"VIMINIT" has been found (see
do_source()).
This function then stores then path and name of the file in the (environment?) variables MYVIMRC or `MYGVIMRC.
do_set()
do_set() is called when an option is set (for example to handle set nocompatible).
set_init_1()
First part of option initializing.
Among others,
set_init_1 sets
p_cp (
option compatible) to
TRUE in order to be VI compatible.
set_init_2()
Second part of option initializing, called after getting rows and columns, and setting term.
set_option_default()
set_option_default sets an option to its default value.
findoption()
Finds the index for a given (char_u*) option.
compatible_set()
compatible_set() is called when
:set compatible or
:set nocompatible] is executed.
when vim is set to compatible, compatible_set sets all options that have the P_VIM flag to a vi compatible value.
Otherwise, it sets all options that have a different default for vim (without the P_VI_DEF flag) to that default.