CentOS 7下Vim安裝YouCompleteMe外掛

最權威的原始步驟可以參考github中關於此外掛的README.md，如果時間允許的話，盡量多看幾遍可以避免很多不必要的麻煩。

一.版本檢測
使用vim --version指令，檢 vim版本是否大於7.3.584，一般新系統都滿足。開啟vim，輸入下述指令檢視是否支援python。如果顯示為1，則表示支援python；如果顯示為0，則表示不支援python，需要重新下載編譯vim，使其支援python。

:echo has('python')
二.下載Vundle和YouCompleteMe外掛
輸入以下指令，下載Vundle

git clone https://github.com/gmarik/Vundle.vim.git ~/.vim/bundle/Vundle.vim
下載成功後，在使用者根目錄下面，修改.vimrc檔案，追加下面語句以便後續安裝YouCompleteMe外掛

set nocompatible 
filetype off 
set rtp+=~/.vim/bundle/Vundle.vim 
call vundle#begin() 
Plugin 'gmarik/Vundle.vim' 
Plugin 'Valloric/YouCompleteMe' 
call vundle#end() 
filetype plugin indent on 
然後在vim中先按Esc建，並且輸入以下指令安裝外掛：

:PluginInstall
三.編譯YouCompleteMe
在編譯之前下載編譯工具，準備編譯YouCompleteMe

sudo yum install automake gcc gcc-c++ kernel-devel cmake
sudo yum install python-devel python3-devel
編譯YouCompleteMe使其支援C/C++ 自動補全

cd ~/.vim/bundle/YouCompleteMe
./install.py --clang-completer

四.設定vim
修改.vimrc檔案

let g:ycm_global_ycm_extra_conf = '/home/li/.vim/bundle/YouCompleteMe/.ycm_extra_conf.py 
let g:ycm_seed_identifiers_with_syntax=1    " 語法關鍵字補全 
let g:ycm_confirm_extra_conf=0  " 開啟vim時不再詢問是否載入ycm_extra_conf.py設定 
inoremap <expr> <CR>  pumvisible() ? "<C-y>" : "<CR>"    "回車即選中當前項 
set completeopt=longest,menu    "讓Vim的補全選單行為與一般IDE一致(參考VimTip1228) 
五. 附件
.ycm_extra_conf.py檔案內容

import os
import ycm_core
flags = [
'-Wall',
'-Wextra',
'-Wno-long-long',
'-Wno-variadic-macros',
'-fexceptions',
'-stdlib=libc++',
'-std=c++11',
'-x',
'c++',
'-I',
'.',
'-isystem',
'/usr/include',
'-isystem',
'/usr/local/include',
'-isystem',
'/Library/Developer/CommandLineTools/usr/include',
'-isystem',
'/Library/Developer/CommandLineTools/usr/bin/../lib/c++/v1',
]

compilation_database_folder = ''

if os.path.exists( compilation_database_folder ):
  database = ycm_core.CompilationDatabase( compilation_database_folder )
else:
  database = None

SOURCE_EXTENSIONS = [ '.cpp', '.cxx', '.cc', '.c', '.m', '.mm' ]

def DirectoryOfThisScript():
  return os.path.dirname( os.path.abspath( __file__ ) )

def MakeRelativePathsInFlagsAbsolute( flags, working_directory ):
  if not working_directory:
    return list( flags )
  new_flags = []
  make_next_absolute = False
  path_flags = [ '-isystem', '-I', '-iquote', '--sysroot=' ]
  for flag in flags:
    new_flag = flag

    if make_next_absolute:
      make_next_absolute = False
      if not flag.startswith( '/' ):
        new_flag = os.path.join( working_directory, flag )

    for path_flag in path_flags:
      if flag == path_flag:
        make_next_absolute = True
        break

      if flag.startswith( path_flag ):
        path = flag[ len( path_flag ): ]
        new_flag = path_flag + os.path.join( working_directory, path )
        break

    if new_flag:
      new_flags.append( new_flag )
  return new_flags

def IsHeaderFile( filename ):
  extension = os.path.splitext( filename )[ 1 ]
  return extension in [ '.h', '.hxx', '.hpp', '.hh' ]

def GetCompilationInfoForFile( filename ):

  if IsHeaderFile( filename ):
    basename = os.path.splitext( filename )[ 0 ]
    for extension in SOURCE_EXTENSIONS:
      replacement_file = basename + extension
      if os.path.exists( replacement_file ):
        compilation_info = database.GetCompilationInfoForFile(
          replacement_file )
        if compilation_info.compiler_flags_:
          return compilation_info
    return None
  return database.GetCompilationInfoForFile( filename )

def FlagsForFile( filename, **kwargs ):
  if database:

    compilation_info = GetCompilationInfoForFile( filename )
    if not compilation_info:
      return None

    final_flags = MakeRelativePathsInFlagsAbsolute(
      compilation_info.compiler_flags_,
      compilation_info.compiler_working_dir_ )

  else:
    relative_to = DirectoryOfThisScript()
    final_flags = MakeRelativePathsInFlagsAbsolute( flags, relative_to )

  return {
    'flags': final_flags,
    'do_cache': True
  }

Vim好用的外掛: YouCompleteMe  http://www.linuxidc.com/Linux/2015-08/122485.htm

Ubuntu 15.04下為Vim安裝YouCompleteMe外掛 http://www.linuxidc.com/Linux/2015-07/120352.htm

Vim自動補全外掛----YouCompleteMe安裝與設定  http://www.linuxidc.com/Linux/2014-04/99719.htm

本文永久更新連結地址：http://www.linuxidc.com/Linux/2016-06/131936.htm