Ubuntu20.04安装YouCompleteMe自动补齐插件

写在开头，为了能够有更好的写代码体验于是安装了YouCompleteMe这个插件，安装成功效果图

若有错误请各位指正，欢迎多多交流。

安装git

sudo apt-get install git 

下载Vundle插件管理器

mkdir -p ~/.vim/bundle git clone https://github.com/gmarik/Vundle.vim.git ~/.vim/bundle/Vundle.vim 

然后在.vimrc中进行设置 (完整.vimrc见文末)

set rtp+=~/.vim/bundle/Vundle.vim call vundle#begin()  Plugin 'VundleVim/Vundle.vim' //插件管理  call vundle#end() 

完成这一步则vim ，命令行模式下输入 ：PluginInstall进行 Vundle 的安装，安装成功后底行显示Done!

获取YouCompleteMe

cd ~/.vim/bundle git clone https://github.com/Valloric/YouCompleteMe.git ~/.vim/bundle/YouCompleteMe 

进入 ~/.vim/bundle/YouCompleteMe 执行 git submodule update --init --recursive  此处git若显示错误：fatal: Out of memory, malloc failed (tried to allocate 5242880000 bytes) 我设置了http.postbuffer=5242880000   https.postbuffer=5242880000 然后将虚拟机内存从2G增大到4G-->问题解决 

环境安装

sudo apt-get install build-essential cmake python-dev python3-dev sudo apt-get install llvm clang libclang-10-dev libboost-all-dev 

下载clang+llvm-10.0.0-x86_64-linux-gnu-ubuntu-18.04.tar.xz.sig包

https://github.com/llvm/llvm-project/releases/download/llvmorg-10.0.0/clang+llvm-10.0.0-x86_64-linux-gnu-ubuntu-18.04.tar.xz 解压到 ~/ycm_temp/llvm_root_dir (自己创建此目录) 此时目录下应有bin、include、lib、libexec、share文件目录，如图所示 

准备编译ycm_core

cd ~ mkdir ycm_build cd ycm_build  cmake -G "Unix Makefiles" -DPATH_TO_LLVM_ROOT=~/ycm_temp/llvm_root_dir . ~/.vim/bundle/YouCompleteMe/third_party/ycmd/cpp  cmake --build . --target ycm_core --config Release 

安装watchdog库和构建正则表达式模块

此部分内容来自 https://github.com/ycm-core/YouCompleteMe/wiki/Full-Installation-Guide 完全安装手册 

5、Install watchdog library

The watchdog dependency is located in YouCompleteMe/third_party/ycmd/third_party/watchdog_deps/watchdog/.

进入 ~/.vim/bundle/YouCompleteMe/third_party/ycmd/third_party/watchdog_deps/watchdog/目录

5.1. For users with setuptools available （如果你的setuptools 可用的话）

Go to the `watchdog` directory, remove `build/lib3` and run 进入watchdog文件夹，将build/lib3文件夹删掉，运行下列命令 python setup.py build --build-base=build/3 --build-lib=build/lib3. 

5.2. Install watchdog when setuptools isn’t available （如果你的setuptools 不可用的话）

Go to the `watchdog` directory, remove the `build/lib3` directory and them copy the entire `src/watchdog`into `build/lib3`. 进入watchdog文件夹，将build/lib3文件夹删掉，再将watchdog下的src文件夹拷贝到 build/lib3  

6、This step is optional. （此步骤可选，构建正则表达式模块）

Build the regex module for improved Unicode support and better performance with regular expressions. The procedure is similar to compiling the ycm_core library:

cd ~ mkdir regex_build cd regex_build cmake -G "Unix Makefiles" . ~/.vim/bundle/YouCompleteMe/third_party/ycmd/third_party/cregex cmake --build . --target _regex --config Release 

此时进入 ~/.vim/bundle/YouCompleteMe文件夹下，运行

python3 install.py --clang-completer 注：其中--clang-completer表示对其C族语言的支持，也可加sudo执行 

完成后将~/.vim/bundle/YouCompleteMe/third_party/ycmd/.ycm_extra_conf.py 拷贝到 ~/.vim/ 下，当然你也可以不用，但是需要在.vimrc中对其路径进行设定，其中一些设定如下：

"YoucomPleteMe:语句补全插件" set runtimepath+=~/.vim/bundle/YouCompleteMe let g:ycm_server_python_interpreter='/usr/bin/python3.8'    "python版本在3以上 let g:ycm_global_ycm_extra_conf='~/.vim/.ycm_extra_conf.py' "加载文件路径 "let g:ycm_clangd_binary_path = "~/ycm_temp/llvm_root_dir/bin/clangd" let g:clang_library_path='/usr/lib/llvm-10/lib/libclang.so'  "libclang路径  autocmd InsertLeave * if pumvisible() == 0|pclose|endif     " 离开插入模式后自动关闭预览窗口" let g:ycm_collect_identifiers_from_tags_files = 1           " 开启YCM基于标签引擎 let g:ycm_collect_identifiers_from_comments_and_strings = 1 " 注释与字符串中的内容也用于补全 let g:syntastic_ignore_files=[".*.py$"] let g:ycm_seed_identifiers_with_syntax = 1                  " 语法关键字补全 let g:ycm_complete_in_strings = 1 let g:ycm_confirm_extra_conf = 0                            " 关闭加载.ycm_extra_conf.py提示 let g:ycm_key_list_select_completion = ['<c-n>', '<Down>']  " 映射按键,没有这个会拦截掉tab, 导致其他插件的tab不能用. let g:ycm_key_list_previous_completion = ['<c-p>', '<Up>'] let g:ycm_key_invoke_completion = '<C-a>'   let g:ycm_complete_in_comments = 1                          " 在注释输入中也能补全 let g:ycm_complete_in_strings = 1                           " 在字符串输入中也能补全 let g:ycm_collect_identifiers_from_comments_and_strings = 1 " 注释和字符串中的文字也会被收入补全 "let g:ycm_global_ycm_extra_conf='~/.vim/bundle/YouCompleteMe/third_party/ycmd/cpp/ycm/.ycm_extra_conf.py' let g:ycm_show_diagnostics_ui = 0                           " 禁用语法检查 let g:ycm_semantic_triggers = {        " 语义触发      'c,cpp,python,java,go,perl':['re!w{2}'],      'cs,lua,javascript':['re!w{2}'],      }  inoremap <expr> <CR> pumvisible() ? "<C-y>" : "<CR>"              nnoremap <c-j> :YcmCompleter GoToDefinitionElseDeclaration<CR>    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_max_num_candidates = 15         " 候选数量设置 let g:ycm_auto_trigger = 1           " 签名帮助 

配置.ycm_extra_conf.py文件

如图白框所示，在两个’-isystem’之间添加自己的编译路径，查看编译路径

echo | gcc -v -E -x c - 

选择图示两个#include和End之间的路径进行添加，此处为gcc，可自行替换。

我的.vimrc文件,自己捣鼓加借鉴老师的.vimrc最后成这样

set nocompatible filetype on   set rtp+=~/.vim/bundle/Vundle.vim call vundle#begin()  Plugin 'VundleVim/Vundle.vim' Plugin 'ycm-core/YouCompleteMe' Plugin 'vim-airline/vim-airline' Plugin 'The-NERD-tree' Plugin 'indentLine.vim' Plugin 'delimitMate.vim' Plugin 'taglist.vim'  call vundle#end() "YoucomPleteMe:语句补全插件" set runtimepath+=~/.vim/bundle/YouCompleteMe let g:ycm_server_python_interpreter='/usr/bin/python3.8' let g:ycm_global_ycm_extra_conf='~/.vim/.ycm_extra_conf.py' ""let g:ycm_clangd_binary_path = "~/ycm_temp/llvm_root_dir/bin/clangd" let g:clang_library_path='/usr/lib/llvm-10/lib/libclang.so'  autocmd InsertLeave * if pumvisible() == 0|pclose|endif     " 离开插入模式后自动关闭预览窗口" let g:ycm_collect_identifiers_from_tags_files = 1           " 开启 YCM基于标签引擎 let g:ycm_collect_identifiers_from_comments_and_strings = 1 " 注释与字符串中的内容也用于补全 let g:syntastic_ignore_files=[".*.py$"] let g:ycm_seed_identifiers_with_syntax = 1                  " 语法关键字补全 let g:ycm_complete_in_strings = 1 let g:ycm_confirm_extra_conf = 0                            " 关闭加载.ycm_extra_conf.py提示 let g:ycm_key_list_select_completion = ['<c-n>', '<Down>']  " 映射按键,没有这个会拦截掉tab, 导致其他插件的tab不能用. let g:ycm_key_list_previous_completion = ['<c-p>', '<Up>'] let g:ycm_key_invoke_completion = '<C-a>'   let g:ycm_complete_in_comments = 1                          " 在注释输入中也能补全 let g:ycm_complete_in_strings = 1                           " 在字符串输入中也能补全 let g:ycm_collect_identifiers_from_comments_and_strings = 1 " 注释和字符串中的文字也会被收入补全 "let g:ycm_global_ycm_extra_conf='~/.vim/bundle/YouCompleteMe/third_party/ycmd/cpp/ycm/.ycm_extra_conf.py' let g:ycm_show_diagnostics_ui = 0                           " 禁用语法检查 let g:ycm_semantic_triggers = {      'c,cpp,python,java,go,perl':['re!w{2}'],      'cs,lua,javascript':['re!w{2}'],      }  inoremap <expr> <CR> pumvisible() ? "<C-y>" : "<CR>"              nnoremap <c-j> :YcmCompleter GoToDefinitionElseDeclaration<CR>    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_max_num_candidates = 15         " 候选数量设置 let g:ycm_auto_trigger = 1           " 签名帮助 " " set t_Co=256 set laststatus=2 " 使用powerline打过补丁的字体 let g:airline_powerline_fonts = 1 " " 开启tabline let g:airline#extensions#tabline#enabled = 1 " " tabline中当前buffer两端的分隔字符 let g:airline#extensions#tabline#left_sep = ' ' " " tabline中未激活buffer两端的分隔字符 let g:airline#extensions#tabline#left_alt_sep = ' ' " " tabline中buffer显示编号 let g:airline#extensions#tabline#buffer_nr_show = 1 " " 映射切换buffer的键位 nnoremap [b :bp<CR> nnoremap ]b :bn<CR> " " 映射<leader>num到num buffer map <leader>1 :b 1<CR> map <leader>2 :b 2<CR> map <leader>3 :b 3<CR> map <leader>4 :b 4<CR> map <leader>5 :b 5<CR> map <leader>6 :b 6<CR> map <leader>7 :b 7<CR> map <leader>8 :b 8<CR> map <leader>9 :b 9<CR> " vim-scripts 中的插件 " "ctags 配置:F3快捷键显示程序中的各种tags，包括变量和函数等。 map <F3> :TlistToggle<CR> let Tlist_Use_Right_Window=1 let g:Tlist_Process_File_Always=1 let Tlist_Auto_Update=1 let Tlist_Show_One_File=1 let Tlist_Exit_OnlyWindow=1 let g:Tlist_Enable_Fold_Column=0 let g:Tlist_Auto_Highlight_Tag=1 let Tlist_WinWidt=25 let Tlist_Ctags_Cmd = "/usr/bin/ctags"  set noswapfile set tags+=/usr/include/tags set tags+=./tags map ta :!ctags -R --c++-kinds=+p --fields=+iaS --extra=+q .<CR> ""NERDTree 配置:F2快捷键显示当前目录树 map <F2> :NERDTreeToggle<CR> " NERDTree.vim let g:NERDTreeWinPos="left" let g:NERDTreeWinSize=25 let g:NERDTreeShowLineNumbers=1 let g:NERDTreeQuitOnOpen=1"""   " 当新建 .h .c .hpp .cpp .mk .sh等文件时自动调用SetTitleMy 函数 autocmd BufNewFile *.[ch],*.hpp,*.cpp,Makefile,*.mk,*.sh exec ":call SetTitleMy()" " 加入注释 func SetCommentMy()  call setline(1,"/*================================================================")  call append(line("."), "*   Copyright (C) ".strftime("%Y")." OIDCAT Ltd. All rights reserved.")  call append(line(".")+1, "*   ")  call append(line(".")+2, "*   文件名称：".expand("%:t"))  call append(line(".")+3, "*   创 建 者：OIDCAT")  call append(line(".")+4, "*   创建日期：".strftime("%Y年%m月%d日"))  call append(line(".")+5, "*   描    述：")  call append(line(".")+6, "*")  call append(line(".")+7, "================================================================*/")  call append(line(".")+8, "")  call append(line(".")+9, "")  endfunc  " 加入shell,Makefile注释 func SetCommentMy_sh()  call setline(1, "#================================================================")  call setline(2, "#   Copyright (C) ".strftime("%Y")." OIDCAT Ltd. All rights reserved.")  call setline(3, "#   ")  call setline(4, "#   文件名称：".expand("%:t"))  call setline(5, "#   创 建 者：OIDCAT")  call setline(6, "#   创建日期：".strftime("%Y年%m月%d日"))  call setline(7, "#   描    述：")  call setline(8, "#")  call setline(9, "#================================================================")  call setline(10, "")  call setline(11, "") endfunc  " 定义函数SetTitleMy，自动插入文件头 func SetTitleMy() if &filetype == 'make'   call setline(1,"")   call setline(2,"")   call SetCommentMy_sh()  elseif &filetype == 'sh'   call setline(1,"#!/bin/sh")   call setline(2,"")   call SetCommentMy_sh() else       call SetCommentMy() if expand("%:e") == 'hpp'     call append(line(".")+10, "#ifndef ".toupper(expand("%:t:r"))."_H__")     call append(line(".")+11, "#define ".toupper(expand("%:t:r"))."_H__")     call append(line(".")+12, "#ifdef __cplusplus")     call append(line(".")+13, "extern "C"")     call append(line(".")+14, "{")     call append(line(".")+15, "#endif")     call append(line(".")+16, "")     call append(line(".")+17, "#ifdef __cplusplus")     call append(line(".")+18, "}")     call append(line(".")+19, "#endif")     call append(line(".")+20, "#endif //".toupper(expand("%:t:r"))."_H__")   elseif expand("%:e") == 'h'           call append(line(".")+10, "#ifndef ".toupper(expand("%:t:r"))."_H__")           call append(line(".")+11, "#define ".toupper(expand("%:t:r"))."_H__")           call append(line(".")+12, "")           call append(line(".")+13, "")           call append(line(".")+14, "")           call append(line(".")+15, "#endif //".toupper(expand("%:t:r"))."_H__")  elseif &filetype == 'c' "call append(line(".")+10,"#include "".expand("%:t:r").".h"")   call append(line(".")+10,"#include <stdio.h>")   call append(line(".")+11,"")   call append(line(".")+12,"")   call append(line(".")+13,"int main(int argc, char *argv[])")   call append(line(".")+14,"{")   call append(line(".")+15," ")   call append(line(".")+16," ")   call append(line(".")+17," return 0;")   call append(line(".")+18,"}")   call append(line(".")+19,"")   elseif &filetype == 'cpp'     call append(line(".")+10, "#include <cstdio>")     call append(line(".")+11, "#include <iostream>")   call append(line(".")+12,"")   call append(line(".")+13,"")     call append(line(".")+14, "using namespace std;")   call append(line(".")+15,"")   call append(line(".")+16,"")    call append(line(".")+17,"int main(int argc, char *argv[])")   call append(line(".")+18,"{")   call append(line(".")+19," ")   call append(line(".")+20," ")   call append(line(".")+21," return 0;")   call append(line(".")+22,"}")   call append(line(".")+23,"")  endif  endif autocmd BufNewFile * normal G endfunc   "键盘命令 nmap <leader>w :w!<cr> nmap <leader>f :find<cr> " 映射全选+复制 ctrl+a map <C-A> ggVGY map! <C-A> <Esc>ggVGY map <F12> gg=G " 选中状态下 Ctrl+c 复制 vmap <C-c> "+y  set autoread autocmd FileType c,cpp map <buffer> <leader><space> :w<cr>:make<cr> set completeopt=preview,menu  filetype plugin on ""set tags=/home/lzy/; ""set autochdir  set clipboard=unnamed  set autowrite set ruler                   " 打开状态栏标尺 set cursorline              " 突出显示当前行 set magic                   " 设置魔术 set guioptions-=T           " 隐藏工具栏 set guioptions-=m           " 隐藏菜单栏 set foldcolumn=0 set foldmethod=indent  set foldlevel=3  set foldenable     set syntax=on set confirm set autoindent set cindent set tabstop=4 set softtabstop=4 set shiftwidth=4 set noexpandtab set smarttab set number set history=1000 set ignorecase set hlsearch set incsearch set gdefault set enc=utf-8 set fencs=utf-8,ucs-bom,shift-jis,gb18030,gbk,gb2312,cp936 set langmenu=zh_CN.UTF-8 set helplang=cn set statusline=%F%m%r%h%w [FORMAT=%{&ff}] [TYPE=%Y] [POS=%l,%v][%p%%] %{strftime("%d/%m/%y - %H:%M")} set statusline=[%F]%y%r%m%*%=[Line:%l/%L,Column:%c][%p%%] set laststatus=2 set cmdheight=2 filetype on filetype plugin on filetype indent on set mouse=a set selection=exclusive set selectmode=mouse,key set report=0 set fillchars=vert: ,stl: ,stlnc: set showmatch set matchtime=1 set scrolloff=3 set smartindent au BufRead,BufNewFile *  setfiletype txt  :inoremap ( ()<ESC>i  :inoremap ) <c-r>=ClosePair(')')<CR> :inoremap [ []<ESC>i  :inoremap ] <c-r>=ClosePair(']')<CR> :inoremap " ""<ESC>i  :inoremap ' ''<ESC>i  function! ClosePair(char) if getline('.')[col('.') - 1] == a:char return "<Right>" else return a:char    endif endfunction   filetype plugin indent on set completeopt=longest,menu  

附：YouCompleteMe完整安装手册

https://github.com/ycm-core/YouCompleteMe/wiki/Full-Installation-Guide