Vim [compile and] run shortcut

Question

Basically what I want is a keyboard shortcut in vim that lets me [compile and] run the currently being edited C, C++ or Python program. In psuedocode:

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Answer 1

I know I came here 7 years later. I tried the code of other answers and the result didn't satisfied me, so I tried this:

autocmd filetype cpp nnoremap <F9> :w<bar>term ++shell g++ %:p -o %:p:r && %:p:r<CR>

When F9 is pressed, it (like all the answers above) compiles and executes the current file. The output is displayed in a :terminal section splitted screen. You can change the g++ command to run another language code.

It is saved in a gist, with another mapping to display the output, also in a splitted section, but in a new file, so you can save the output.

Hopefully it could help someone.

Answer 2

It's 2018 now, vim 8 has released for 2 years and shipped with all the mean stream Linux distributions and Mac OS X. But a lot of vim tutorials are still teaching people something ten years ago.

You can compile your C++/Java programs in vim as convenience as Sublime Text or NotePad++ with some dedicated plugins for Vim 8 or NeoVim.

For example, the AsyncRun plugin will allow you run shell commands in background and read output from quickfix window in realtime. See the screen capture.

Just like compiling programs in IDEs, the compilation errors will be matched by errorformat and be highlighted and become selectable. You can navigate errors in the quickfix window or continue editing while compiling.

Quick setup

Copy & paste the lines below to your vimrc:

Plug 'skywind3000/asyncrun.vim'

" open quickfix window automatically when AsyncRun is executed
" set the quickfix window 6 lines height.
let g:asyncrun_open = 6

" ring the bell to notify you job finished
let g:asyncrun_bell = 1

" F10 to toggle quickfix window
nnoremap <F10> :call asyncrun#quickfix_toggle(6)<cr>

When you input “:AsyncRun echo hello ” in the command line:

see the capture here

You will see the realtime command output in the open quickfix window.

Compile and run a single file

Compiling a single file with AsyncRun is much simpler than Sublime Text’s build system. We can setup F9 for this:

noremap <silent> <F9> :AsyncRun gcc -Wall -O2 "$(VIM_FILEPATH)" -o "$(VIM_FILEDIR)/$(VIM_FILENOEXT)" <cr>

The macros in $(..) form will be expanded as the real file name or directory, and then we will have F5 to run the executable:

noremap <silent> <F5> :AsyncRun -raw -cwd=$(VIM_FILEDIR) "$(VIM_FILEDIR)/$(VIM_FILENOEXT)" <cr>

The double quotation mark is used to handle path names containing spaces. The option -cwd=$(VIM_FILEDIR) means running the file in the file's directory. The absolute path name $(VIM_FILEDIR)/$(VIM_FILENOEXT) is used because linux needs a ./ prefix to running executables in current directory, but windows doesn't . Using the absolute path name of the binary file can handle this crossing platform issue.

Another option -raw means the output will not be matched by vim's errorformat, and will be displayed in quickfix as what it is. Now you can compile your file with F9, check the compilation errors in quickfix window and press F5 to run the binary.

Build C/C++ Projects

No matter what build tool you are using, make or cmake, project building means acting to a group of files. It requires locating the project root directory. AsyncRun uses a simple method called root markers to identify the project root. The Project Root is identified as the nearest ancestor directory of the current file which contains one of these directories or files:

let g:asyncrun_rootmarks = ['.svn', '.git', '.root', '_darcs'] 

If none of the parent directories contains these root markers, the directory of the current file is used as the project root. This enables us to use either <root> or $(VIM_ROOT) to represent the project root. and F7 can be setup to build the current project:

noremap <silent> <F7> :AsyncRun -cwd=<root> make <cr>

What if your current project is not in any git or subversion repository ? How to find out where is my project root ? The solution is very simple, just put an empty .root file in your project root, it will be located easily.

Let’s move on, setup F8 to run the current project:

noremap <silent> <F8> :AsyncRun -cwd=<root> -raw make run <cr>

The project will run in its root directory. Of course, you need define the run rule in your own makefile. then remap F6 to test:

noremap <silent> <F6> :AsyncRun -cwd=<root> -raw make test <cr>

If you are using cmake, F4 can be map to update your Makefile:

nnoremap <silent> <F4> :AsyncRun -cwd=<root> cmake . <cr>

Due to the implementation of c runtime, if the process is running is a non-tty environment, all the data in stdout will be buffered until process exits. So, there must be a fflush(stdout) after your printf statement if you want to see the real-time output. or you can close the stdout buffer at the beginning by

setbuf(stdout, NULL);

At the mean time, if you are writing C++ code, a std::endl can be appended to the end of std::cout. It can force flush the stdout buffer. If you are developing on windows, AsyncRun can open a new cmd window for the child process:

nnoremap <silent> <F5> :AsyncRun -cwd=$(VIM_FILEDIR) -mode=4 "$(VIM_FILEDIR)/$(VIM_FILENOEXT)" <cr>
nnoremap <silent> <F8> :AsyncRun -cwd=<root> -mode=4 make run <cr>

Using the option -mode=4 on windows will open a new prompt window to run the command, just like running command line programs in Visual Studio. Finally, we have these key mappings below:

• F4: update Makefile with cmake.
• F5: run the single file
• F6: run project test
• F7: build project
• F8: run project
• F9: compile the single file
• F10: toggle quickfix window

It is more like build system in NotePad++ and GEdit. If you are using cmake heavily, you can write a simple shell script located in ~/.vim/script/build.sh to combine F4 and F7 together: it will update Makefile if CMakeList.txt has been changed, then exectute make.

Advanced usage

You can also define shell scripts in your dotfiles repository and execute the script with F3:

nnoremap <F3> :AsyncRun -cwd=<root> sh /path/to/your/dotfiles/script/build_advanced.sh <cr>

The following shell environment variables are defined by AsyncRun:

$VIM_FILEPATH  - File name of current buffer with full path
$VIM_FILENAME  - File name of current buffer without path
$VIM_FILEDIR   - Full path of current buffer without the file name
$VIM_FILEEXT   - File extension of current buffer
$VIM_FILENOEXT - File name of current buffer without path and extension
$VIM_CWD       - Current directory
$VIM_RELDIR    - File path relativize to current directory
$VIM_RELNAME   - File name relativize to current directory 
$VIM_ROOT      - Project root directory
$VIM_CWORD     - Current word under cursor
$VIM_CFILE     - Current filename under cursor
$VIM_GUI       - Is running under gui ?
$VIM_VERSION   - Value of v:version
$VIM_COLUMNS   - How many columns in vim's screen
$VIM_LINES     - How many lines in vim's screen
$VIM_SVRNAME   - Value of v:servername for +clientserver usage

All the above environment variables can be used in your build_advanced.sh. Using the external shell script file can do more complex work then a single command.

Grep symbols

Sometimes, If you don't have a well setup environment in you remote linux box, grep is the most cheap way to search symbol definition and references among sources. Now we will have F2 to search keyword under cursor:

if has('win32') || has('win64')
    noremap <F2> :AsyncRun! -cwd=<root> grep -n -s -R <C-R><C-W> --include='*.h' --include='*.c*' '<root>' <cr>
else
    noremap <F2> :AsyncRun! -cwd=<root> findstr /n /s /C:"<C-R><C-W>" "\%CD\%\*.h" "\%CD\%\*.c*" <cr>
endif

The above script will run grep or findstr in your project root directory, and find symbols in only .c, .cpp and .h files. Now we move around the cursor and press F2, the symbol references in current project will be displayed in the quickfix window immediately.

This simple keymap is enough for most time. And you can improve this script to support more file types or other grep tools in your vimrc .

That’s the practical way to build/run C/C++ projects in Vim 8 or NeoVim. Just like Sublime Text’s build system and NotePad++’s NppExec.

No more outdated vim tutorials again, try something new.

Answer 3

this is my map it really work you can update it to any language:

" <!----------------------------" gcc compile C files----------------------------------------!>
autocmd filetype c nnoremap <Leader>c :w <CR>:!gcc % -o %:r && ./%:r<CR>

" <!----------------------------" java compile files----------------------------------------!>
autocmd filetype java nnoremap <Leader>c :w <CR>:!javac % :r&& java %:r<CR>
" <!----------------------------" php compile files----------------------------------------!>
autocmd filetype php nnoremap <Leader>c :w <CR>:!clear && php  %<CR>

now if you are ine one of those file in vim just do in normal mode:

<leader>c

Answer 4

Something like this would work. Just create filetype autocmd that map <F4> or whatever you want to save and compile and run the program. It uses exec to build the string and uses shellescape to escape the file name.

autocmd filetype python nnoremap <F4> :w <bar> exec '!python '.shellescape('%')<CR>
autocmd filetype c nnoremap <F4> :w <bar> exec '!gcc '.shellescape('%').' -o '.shellescape('%:r').' && ./'.shellescape('%:r')<CR>
autocmd filetype cpp nnoremap <F4> :w <bar> exec '!g++ '.shellescape('%').' -o '.shellescape('%:r').' && ./'.shellescape('%:r')<CR>

% is the current buffer filename. %:r is the buffer filename without extension

Answer 5

I wanted to find a shortcut too. But I didn't want to use autocmd for some reason. I used bash script. I was already using a bash script to compile and run my C/C++ codes. So, I thought, why don't I use a bash script and use it in fltplugin file for C and C++. I made two separate bash scripts. One for C and one for C++. Here is the script for C (For C++, it is also similar just change the compiler to clang++/g++, std=c2x to std=c++20 and $filename.c to $filename.cpp),

filename=$1
compiler=clang-10
if [ $2 ]; then
    if [ $2 == "-v" ]; then
        FLAGS="-g -Wall -Wextra -pedantic -std=c2x"
    fi
else
    FLAGS="-Wall -Wextra -pedantic -std=c2x"
fi

$compiler $FLAGS $filename.c -o $filename -lm

return_value=$?

if [ $return_value -eq 0]; then
    if [ $2 ]; then
        if [ $2 == "-v" ]; then
            valgrind ./$filename
            rm $filename
        fi
    else
        ./$filename
        echo
        echo "[process exited $return_value]"
        rm $filename
    fi
fi

Saved it as run. I made it executable for all users,

$ chmod 777 run

I moved it to my user bin directory.

$ mv run ~/bin

If you dont have a user bin directory, make on. Go to your home directory, and make a directory named bin.

$ cd ~
$ mkdir bin

Then move the run (or whatever name you gave to your script) file to the bin directory.

$ mv run ~/bin

Let's move on. Then I made a c.vim file in ~/.vim/after/ftplugin directory. And add two new key remaps to the c.vim file.

nnoremap <F9> :vertical bo term run %:r<CR>

# This will run my code with valgrind
nnoremap <F2> :vertical bo term run %:r -v<CR> 

Here are some screen shots,

Clicking F9 shows me the output screen in a vim buffer,

Clicking F2 shows me the output using valgrind in a vim buffer

You can do same for C++, just make a cpp.vim file in ~/.vim/after/ftplugin directory. And make another run file (like run_cpp), save it in your user bin(~/bin) file. Make some custom key bindings, and you are good to go.

Answer 6

http://singlecompile.topbug.net seems to do more than what you want. For a simpler solution you could also just add the following to your vimrc

au BufEnter *.cpp set makeprg=g++\ -g\ %\ -o\ %< 
au BufEnter *.c set makeprg=gcc\ -g\ %\ -o\ %< 
au BufEnter *.py set makeprg=python\ % 
au BufEnter *.[rR] set makeprg=Rscript\ %
map <F5> :call CompileGcc()<CR>
func! CompileGcc()
    exec "w" 
    silent make
endfunc

HTH