Explore Linux Source Code by vim
===
###### tags: `linux` `vim` `cscope` `ctags`

## cscope

Create 'cscope.sh' under 'linux-5.10.1/',and copy the below text to 'cscope.sh':

#!/bin/sh
find ./ -name "*.c" -o -name "*.h" -o -name "*.cpp" > cscope.files
cscope -Rbqk -i cscope.files

Execute the script:

./cscope.sh

It will create cscope.file, and then cscope.out, cscopt.po.out, cscopt.in.out

## ctag
Type the following command under 'linux-5.10.1/', it will create a file called 'tags'

sudo ctags -R *


## ~/.vimrc

add the below text to ~/.vimrc
將"/home/user/Downloads/linux-5.10.1"取代為實際的linux source路徑

set tags=/home/user/Downloads/linux-5.10.1/tags

~/.vimrc looks like:

execute pathogen#infect()
syntax on
filetype plugin indent on

set tags=/home/user/Downloads/linux-5.10.1/tags
set number
set hlsearch
set bg=dark
hi Comment ctermfg=green

nmap zs :cs find s <C-R>=expand("<cword>")<CR><CR>
nmap zg :cs find g <C-R>=expand("<cword>")<CR><CR>
nmap zc :cs find c <C-R>=expand("<cword>")<CR><CR>
nmap zd :cs find d <C-R>=expand("<cword>")<CR><CR>
nmap zt :cs find t <C-R>=expand("<cword>")<CR><CR>
nmap ze :cs find e <C-R>=expand("<cword>")<CR><CR>
nmap zf :cs find f <C-R>=expand("<cfile>")<CR><CR>
nmap zi :cs find i <C-R>=expand("<cfile>")<CR><CR>

## vim

Go to the folder 'linux-5.10.1/', and open vim:

vim

Type the following command in vim's cmd mode:

:NERDTree
:cs add cscope.out

Now you can explore linux by vim: