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How to use clangd C/C++ LSP in any project

tl;dr: If you want to just know the method, skip to How to section

Clangd is a state-of-the-art C/C++ LSP that can be used in every popular text editors like Neovim, Emacs or VS Code. Even CLion uses clangd under the hood. Unfortunately, clangd requires compile_commands.json to work, and the only way to painlessly generate it is to use CMake.

But what if I tell you you can quickly hack your way around that, and generate compile_commands.json for any project, no matter how compilcated? I have used that way at work for years, originaly because I used CLion which supported only CMake projects - but now I use that method succesfully with clangd and Neovim.

Method summary

Basically what we need to achieve is to create a CMake file that will generate a compile_commands.json file with information about:

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export EDITOR=vim
export VISUAL=$EDITOR

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#!/usr/bin/env node
/**
 *******************************
 *  Copyright 2020 sytranvn    *
 *  License: MIT License       *
 *******************************
 */

const { exit } = require('process')
const {promises } = require('fs')

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Environment variables in Jekyll templates

This is one way to pass some data (API tokens, etc.) to your Jekyll templates without putting it in your _config.yml file (which is likely to be committed in your GitHub repository).

Copy the environment_variables.rb plugin to your _plugins folder, and add any environment variable you wish to have available on the site.config object.

In a Liquid template, that information will be available through the site object. For example, _layouts/default.html could contain:

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#!/usr/bin/env bash
# by Jamie Tanna
python -c $'import json\nimport sys\nwith open(sys.argv[1], "r") as f: print(json.dumps(json.load(f)))' $1

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// v8/utils
inline int HexValue(uc32 c) {
  c -= '0';
  if (static_cast<unsigned>(c) <= 9) return c;
  c = (c | 0x20) - ('a' - '0'); // detect 0x11..0x16 and 0x31..0x36.
  if (static_cast<unsigned>(c) <= 5) return c + 10;
  return -1;
}

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#!/usr/bin/env sh

# USAGE: transfer.sh [--ignore-existing] [user@]host[:port] <source> <destination>

ie=""

if [ "$1" = "--ignore-existing" ]; then
  ie="$1"
  shift
fi

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collapsible markdown?

CLICK ME

yes, even hidden code blocks!

print("hello world!")

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const algorithm = 'aes-192-cbc';
const password = 'Password used to generate key';

const LOOPS = process.env.LOOPS || 2;

// start mesuring time
const hrstart = process.hrtime()

for (i=1; i <= LOOPS; i++) {
   const index = i;

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from xlsx2html.core import worksheet_to_data, render_data_to_html
from openpyxl import load_workbook

workbook = load_workbook('input.xlsx')

for i, ws in enumerate(workbook.worksheets):
  data = worksheet_to_data(ws)
  html = render_data_to_html(data)
  output = open('output_%s.html' % i, 'w')
  output.write(html)