Vim使用Vundle安装代码补全插件（YouCompleteMe）

Vim使用Vundle安装代码补全插件（YouCompleteMe）
安装 Vundle
它的使用方法很简单，安装一个插件只需要在 ~/.vimrc 按照规则中添加 Plugin 的名称，某些需要添加路径，之后在 Vim 中使用:PluginInstall既可以自动化安装。

1、先新建目录

mkdir ~/.vim/bundle/Vundle.vim
2、git 克隆 Vundle 工程到本地

git clone https://github.com/gmarik/Vundle.vim.git ~/.vim/bundle/Vundle.vim
 3、修改 ~/.vimrc 配置 Plugins。在 ~/.vimrc 文件中添加如下内容并保存

Introduction:

Installation requires Git and triggers git clone for each configured repository to ~/.vim/bundle/ by default. Curl is required for search.

If you are using Windows, go directly to Windows setup. If you run into any issues, please consult the FAQ. See Tips for some advanced configurations.

Using non-POSIX shells, such as the popular Fish shell, requires additional setup. Please check the FAQ.

Set up Vundle:

git clone https://github.com/VundleVim/Vundle.vim.git ~/.vim/bundle/Vundle.vim

Configure Plugins:

Put this at the top of your .vimrc to use Vundle. Remove plugins you don't need, they are for illustration purposes.

set nocompatible              " be iMproved, required
filetype off                  " required

" set the runtime path to include Vundle and initialize
set rtp+=~/.vim/bundle/Vundle.vim
call vundle#begin()
" alternatively, pass a path where Vundle should install plugins
"call vundle#begin('~/some/path/here')

" let Vundle manage Vundle, required
Plugin 'VundleVim/Vundle.vim'

" The following are examples of different formats supported.
" Keep Plugin commands between vundle#begin/end.
" plugin on GitHub repo
Plugin 'tpope/vim-fugitive'
" plugin from http://vim-scripts.org/vim/scripts.html
" Plugin 'L9'
" Git plugin not hosted on GitHub
Plugin 'git://git.wincent.com/command-t.git'
" git repos on your local machine (i.e. when working on your own plugin)
Plugin 'file:///home/gmarik/path/to/plugin'
" The sparkup vim script is in a subdirectory of this repo called vim.
" Pass the path to set the runtimepath properly.
Plugin 'rstacruz/sparkup', {'rtp': 'vim/'}
" Install L9 and avoid a Naming conflict if you've already installed a
" different version somewhere else.
" Plugin 'ascenator/L9', {'name': 'newL9'}

" All of your Plugins must be added before the following line
call vundle#end()            " required
filetype plugin indent on    " required
" To ignore plugin indent changes, instead use:
"filetype plugin on
"
" Brief help
" :PluginList       - lists configured plugins
" :PluginInstall    - installs plugins; append `!` to update or just :PluginUpdate
" :PluginSearch foo - searches for foo; append `!` to refresh local cache
" :PluginClean      - confirms removal of unused plugins; append `!` to auto-approve removal
"
" see :h vundle for more details or wiki for FAQ
" Put your non-Plugin stuff after this line

Install Plugins:

Launch vim and run :PluginInstall

To install from command line: vim +PluginInstall +qall

(optional) For those using the fish shell: add set shell=/bin/bash to your .vimrc

4、进入 vim 运行命令

:PluginInstall
Vundle 命令
# 安装插件
:BundleInstall
# 更新插件
:BundleUpdate
# 清除不需要的插件
:BundleClean
# 列出当前的插件
:BundleList
# 搜索插件
:BundleSearch
注意
插件配置不要在 call vundle#end() 之前，不然插件无法生效
如果配置错误，需要重新配置后，在vim中运行命令 :PluginInstall

使用 Vundle 安装 YouCompleteMe
在 ~/.vimrc 中添加如下内容 位置在call vundle#begin()和call vundle#end()之间

Bundle 'Valloric/YouCompleteMe'
在vim中运行以下命令就会自行安装，安装时间有点长，请耐心等待

:BundleInstall
安装完成后需要编译 YouCompleteMe
编译过程需要CMake，没有安装CMake可使用以下命令进行安装

sudo apt install cmake
然后切换到以下目录

cd ~/.vim/bundle/YouCompleteMe 
最后输入以下命令即可（默认支持python）

./install.sh
配置 YouCompleteMe
在 ~/.vimrc 中添加配置

" 自动补全配置
set completeopt=longest,menu "让Vim的补全菜单行为与一般IDE一致(参考VimTip1228)
autocmd InsertLeave * if pumvisible() == 0|pclose|endif "离开插入模式后自动关闭预览窗口
inoremap <expr> <CR> pumvisible() ? "\<C-y>" : "\<CR>" "回车即选中当前项
"上下左右键的行为 会显示其他信息
inoremap <expr> <Down> pumvisible() ? "\<C-n>" : "\<Down>"
inoremap <expr> <Up> pumvisible() ? "\<C-p>" : "\<Up>"
inoremap <expr> <PageDown> pumvisible() ? "\<PageDown>\<C-p>\<C-n>" : "\<PageDown>"
inoremap <expr> <PageUp> pumvisible() ? "\<PageUp>\<C-p>\<C-n>" : "\<PageUp>"

"youcompleteme 默认tab s-tab 和自动补全冲突
"let g:ycm_key_list_select_completion=['<c-n>']
let g:ycm_key_list_select_completion = ['<Down>']
"let g:ycm_key_list_previous_completion=['<c-p>']
let g:ycm_key_list_previous_completion = ['<Up>']
let g:ycm_confirm_extra_conf=0 "关闭加载.ycm_extra_conf.py提示

let g:ycm_collect_identifiers_from_tags_files=1 " 开启 YCM 基于标签引擎
let g:ycm_min_num_of_chars_for_completion=2 " 从第2个键入字符就开始罗列匹配项
let g:ycm_cache_omnifunc=0 " 禁止缓存匹配项,每次都重新生成匹配项
let g:ycm_seed_identifiers_with_syntax=1 " 语法关键字补全
nnoremap <F5> :YcmForceCompileAndDiagnostics<CR> "force recomile with syntastic
"nnoremap <leader>lo :lopen<CR> "open locationlist
"nnoremap <leader>lc :lclose<CR> "close locationlist
inoremap <leader><leader> <C-x><C-o>
"在注释输入中也能补全
let g:ycm_complete_in_comments = 1
"在字符串输入中也能补全
let g:ycm_complete_in_strings = 1
"注释和字符串中的文字也会被收入补全
let g:ycm_collect_identifiers_from_comments_and_strings = 0

nnoremap <leader>jd :YcmCompleter GoToDefinitionElseDeclaration<CR> " 跳转到定义处

到此，YouCompleteMe 已安装成功。