I realize nvim now provides libnvim.a, this repo may not be needed anymore.
another c++-20 nvim msgpack-rpc client, nvim-0.5.0 tested.
nvim's rpc interface is convenient but not something you can finish in 10 minutes.
this repo creates libnvc.a and you can use it to read/write a process running neovim easily.
start nvim and use asio_socket to talk to it:
#include "libnvc.hpp"
int main()
{
// start nvim:
// $ nvim --listen "127.0.0.1:6666"
libnvc::asio_socket socket;
if(!socket.connect("localhost", 6666)){
throw std::runtime_error("failed to connect to localhost:6666");
}
libnvc::api_client client(&socket);
client.nvim_input("$i123<CR>123<ESC>");
client.nvim_buf_set_name(1, "1234");or use reproc_device to spawn a process running nvim in background:
#include "libnvc.hpp"
int main()
{
// spawn nvim process with default parameters
libnvc::reproc_device reproc_dev;
reproc_dev.spawn();
libnvc::api_client client(&reproc_dev);
client.nvim_ui_attach(100, 80, {{"rgb", true}, {"ext_linegrid", true}});
client.nvim_input("$i123<CR>123<ESC>");
client.nvim_buf_set_name(1, "1234");there is zero dependenct for user's building environment.
libnvc use asio, mpack and reproc internally but hiden by pimpl.
# build the libnvc library, nvim should be in your PATH
$ cd $HOME
$ git clone https://github.com/etorth/libnvc.git
$ mkdir b_libnvc && cd b_libnvc
$ cmake ../libnvc -DCMAKE_INSTALL_PREFIX=install -DCMAKE_C_COMPILER=gcc-11 -DCMAKE_CXX_COMPILER=g++-11
$ make && make install
# build the sample project, a simple nvim gui
# this requires SDL2, SDL2-image and SDL2-ttf installed
$ cd $HOME
$ mkdir b_nvim_sdl2 && cd b_nvim_sdl2
$ cmake ../libnvc/sample/nvim_sdl2 -DCMAKE_INSTALL_PREFIX=install -DLIBNVC_INCLUDE=$HOME/b_libnvc/install/include -DLIBNVC_LIB=$HOME/b_libnvc/install/lib
$ make && make install
# run the sample gui
$ cd $HOME/b_nvim_sdl2/install/nvim_sdl2 && ./nvim_sdl2
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