一、YouCompleteMe介绍
YouCompleteMe(简称YCM)是一款vim的智能补全插件，支持
C/C++, Go, Python...等多种代码类型补全。它强大的功能吸引了不少人的使用，但有无数人因为安装它“折腰”，因为它的安装过程确实很麻烦。
花了一个下午的时间，来回装了两次，终于算是勉强搞定。
首先假定你已经安装好了vim和对应的插件管理器：升级安装vim 8.0并添加vundle插件管理
要注意的是，vim编辑器要求编译的时候添加了python支持。
根据测试，选择python2支持会比python3省事一些，因为后面安装cmake的时候貌似只能使用python2（具体是不是这样没有去深入研究，目前暂且按python2的来）。
先上一张效果图：
代码的主页为YouCompelteMe，先把代码拷贝到插件目录下：
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git clone --recursive https://github.com/Valloric/YouCompleteMe.git ~/.vim/bundle/YouCompleteMe git submodule update --init --recursive |
二、安装clang
clang下载地址，找到对应的二进制包下载：
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wget https://releases.llvm.org/6.0.0/clang+llvm-6.0.0-x86_64-linux-gnu-ubuntu-14.04.tar.xz tar -Jxvf clang+llvm-6.0.0-x86_64-linux-gnu-ubuntu-14.04.tar.xz -C /usr/local ln -s /usr/local/clang+llvm-6.0.0-x86_64-linux-gnu-ubuntu-14.04/ /usr/local/clang |
需要用到的是libclang.so库文件，位于安装目录下的lib/libclang.so。
三、安装cmake
从源码编译安装：
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wget https://cmake.org/files/v3.11/cmake-3.11.0-rc3.tar.gz tar -zxvf cmake-3.11.0-rc3.tar.gz cd cmake-3.11.0-rc3 ./bootstrap make && make install |
校验是否安装成功：
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> cmake --version cmake version 3.11.0-rc3 CMake suite maintained and supported by Kitware (kitware.com/cmake). |
四、编译ycm_core
建立一个临时文件夹~/ycm_build用来作为临时编译文件夹：
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mkdir ~/ycm_build cd ~/ycm_build |
使用cmake生成Makefile文件：
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cmake -G "Unix Makefiles" -DEXTERNAL_LIBCLANG_PATH=/usr/local/clang/lib/libclang.so . ~/.vim/bundle/YouCompleteMe/third_party/ycmd/cpp |
问题一
如果安装vim时指定python的支持版本为python3，则在上面还要加上-DUSE_PYTHON2=OFF选项关掉默认使用python2编译。
否则安装完成后会出现以下错误：
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The ycmd server SHUT DOWN (restart with ':YcmRestartServer'). YCM core library compiled for Python 2 but loaded in Python 3. Set the 'g:ycm_server_python_interpreter' option to a Python 2 interpreter path. |
问题二
在ubuntu 16.04中执行这一步骤时遇到boost库缺失的问题：
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CMake Warning at /usr/local/share/cmake-3.11/Modules/FindBoost.cmake:564 (message): Imported targets and dependency information not available for Boost version (all versions older than 1.33) Call Stack (most recent call first): /usr/local/share/cmake-3.11/Modules/FindBoost.cmake:903 (_Boost_COMPONENT_DEPENDENCIES) /usr/local/share/cmake-3.11/Modules/FindBoost.cmake:1571 (_Boost_MISSING_DEPENDENCIES) ycm/CMakeLists.txt:205 (find_package) Please set them or make sure they are set and tested correctly in the CMake files: Boost_INCLUDE_DIR (ADVANCED) used as include directory in directory /home/ma/.vim/bundle/YouCompleteMe/third_party/ycmd/cpp/ycm used as include directory in directory /home/ma/.vim/bundle/YouCompleteMe/third_party/ycmd/cpp/ycm used as include directory in directory /home/ma/.vim/bundle/YouCompleteMe/third_party/ycmd/cpp/ycm -- Configuring incomplete, errors occurred! See also "/home/ma/ycm_build/CMakeFiles/CMakeOutput.log". |
解决方案：
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然后重新执行：
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> cmake -G "Unix Makefiles" -DEXTERNAL_LIBCLANG_PATH=/usr/local/clang/lib/libclang.so . ~/.vim/bundle/YouCompleteMe/third_party/ycmd/cpp # 以下为输出 -- The C compiler identification is GNU 5.4.0 -- The CXX compiler identification is GNU 5.4.0 -- Check for working C compiler: /usr/bin/cc -- Check for working C compiler: /usr/bin/cc -- works -- Detecting C compiler ABI info -- Detecting C compiler ABI info - done -- Detecting C compile features -- Detecting C compile features - done -- Check for working CXX compiler: /usr/bin/c++ -- Check for working CXX compiler: /usr/bin/c++ -- works -- Detecting CXX compiler ABI info -- Detecting CXX compiler ABI info - done -- Detecting CXX compile features -- Detecting CXX compile features - done -- Found PythonLibs: /usr/lib/x86_64-linux-gnu/libpython2.7.so (found suitable version "2.7.12", minimum required is "2.7") -- Using libclang to provide semantic completion for C/C++/ObjC -- Using external libclang: /usr/local/clang+llvm-6.0.0-x86_64-linux-gnu-ubuntu-14.04/lib/libclang.so.6.0 -- Configuring done -- Generating done -- Build files have been written to: /home/ma/ycm_build |
如果以上步骤都没有问题，开始下面的步骤
构建ycm_core：
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cmake --build . --target ycm_core --config Release |
成功的结果：
五、配置
5.1 基础配置
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cp ~/.vim/bundle/YouCompleteMe/third_party/ycmd/examples/.ycm_extra_conf.py ~/.vim/ |
在~/.vimrc中添加配置：
添加插件支持，在vundle插件代码块中加入以下内容：
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set rtp+=~/.vim/bundle/Vundle.vim call vundle#begin() Plugin 'VundleVim/Vundle.vim' " 新加的YCM插件 Plugin 'Valloric/YouCompleteMe' call vundle#end() |
然后添加配置文件：
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"如果编译时指定的python版本为python3，这里也要改成对应的python版本 let g:ycm_server_python_interpreter='/usr/bin/python' let g:ycm_global_ycm_extra_conf='~/.vim/.ycm_extra_conf.py' |
创建一个*.c文件测试：
5.2 其他配置
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" 添加C++11 支持 let g:syntastic_cpp_compiler='g++' let g:syntastic_cpp_compiler_options='std=c++11 -stdlib=libc++' "离开插入模式后自动关闭预览窗口 set completeopt=longest,menu autocmd InsertLeave * if pumvisible() == 0|pclose|endif "回车即选中当前项 inoremap <expr> <CR> pumvisible() ? "\<C-y>" : "\<CR>" 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>'] "关闭加载.ycm_extra_conf.py提示 let g:ycm_confirm_extra_conf=0 " 开启 YCM 基于标签引擎 let g:ycm_collect_identifiers_from_tags_files=1 " 从第2个键入字符就开始罗列匹配项 let g:ycm_min_num_of_chars_for_completion=2 " 禁止缓存匹配项,每次都重新生成匹配项 let g:ycm_cache_omnifunc=0 " 语法关键字补全 let g:ycm_seed_identifiers_with_syntax=1 "force recomile with syntastic nnoremap <F5> :YcmForceCompileAndDiagnostics<CR> "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 let g:clang_user_options='|| exit 0' "nnoremap <leader>jd :YcmCompleter GoToDefinitionElseDeclaration<CR> " 跳转到定义处 |
六、其他
6.1 C++头文件没有智能提示
添加都头文件目录到~/.vim/.ycm_extra_conf.py的flags数组中即可。
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# 找到头文件所在的目录 > sudo find / -name iostream /usr/include/c++/5/iostream /usr/include/boost/tr1/tr1/iostream /usr/local/clang+llvm-6.0.0-x86_64-linux-gnu-ubuntu-14.04/include/c++/v1/iostream find: ‘/run/user/1000/gvfs’: Permission denied |
添加到flags数组：
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flags=[ '...', '-isystem', '/usr/local/clang+llvm-6.0.0-x86_64-linux-gnu-ubuntu-14.04/include/c++/v1', ] |
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