Setting up Neovim with Vim Plug and YouCompleteMe

I’m moving to neovim for my primary editing purposes. VSCode has served me well, but I’m growing wearing of its growing pains. Some extensions don’t work well, and many things seem broken of late. Besides, I don’t really use the IDE features all that much.

I’ve been using neovim for quite some time, and I like it. I grok the vim movement keys, and I love the modes. Vim in and of itself seems to have problems that I didn’t delve into.

I don’t like using others’ configs. I’ve tried doing that, and that really didn’t work for me. I am also very pedantic about messing with global python installations, since some of the plugins usually recommend installing packages willy-nilly in the global python install.

Installing Neovim

I’ve downloaded the latest development version of neovim from the website.

sudo mv ~/Downloads/nvim.AppImage /usr/bin/nvim

Configuration

My dotfiles, as always, are here. The README.md documents everything therein, but I’m taking the time here to talk about a particular problem I had personally when setting up YouCompleteMe.

Installing Vim Plug

I use vim-plug as my package manager of choice.

sh -c 'curl -fLo "${XDG_DATA_HOME:-$HOME/.local/share}"/nvim/site/autoload/plug.vim --create-dirs \
       https://raw.githubusercontent.com/junegunn/vim-plug/master/plug.vim'

The Plugins I’ve chosen are listed in the README of the github repository.

Installing YouCompleteMe

These instructions are valid for Manjaro Linux running the 5.13.0-AMD-znver2 kernel, however they shouldn’t vary for any version of Linux.

While most tutorials instruct you to install YouCompleteMe using the system installation of Python, do not do that. Instead, create a virtual environment or a conda environment. In fact, you’ll see exactly why I recommend using a conda environment.

conda create -n nvim python=3.9
conda activate nvim
pip install pynvim neovim

After creating this environment, edit the init.vim file and ensure that you change the path to reflect where the python command in your new environment resides.

You can check that by typing which python while you have the environment activated.

let g:python3_host_prog = '/home/stonecharioteer/code/tools/miniconda3/envs/nvim/bin/python3'

This tells your neovim installation where to expect the python3 installation.

Make sure you activate your Vim Plug hook after setting this value.

After you run :PlugInstall, exit nvim and navigate to the ~/.local/share/nvim/plugged/YouCompleteMe folder.

Here, with your python3 environment activated, run python3 install.py --all.

Then, you should start nvim to check if YouCompleteMe reports any errors. You can check the STDERR logs using :YcmToggleLogs and then pressing 2.

You will notice that there is a problem with GLIBCXX_3.4.29, which YCM reports is missing from the libstdc++.so.6 file in your Conda environment’s lib folder.

This is very easily remediable.

All you need to is delete the file that exists in your lib folder, and instead symlink the system’s libstdc++.so.6 file into this folder. This file is usually in /usr/lib64.

Ensure you have the latest glibc package installed on your machine.

Note

This post is rather esoteric for a problem that I’ve faced just now. I thought I’d document it because I’m prone to forget how I fixed this.

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