Generate include paths for ESP32 ESP-IDF for use in VSCode (c_cpp_properties.json)

gen_esp_idf_vscode_include_paths.rb

require 'pry'
require 'json'

APP_ROOT = File.dirname(__FILE__)

def dirs_in path
  Dir.each_child(path)
    .select{ |e| File.directory? File.join(path, e) }
    .map{ |dir| File.realpath File.join(path, dir) }
end

def has_header_files path
  Dir.each_child(path)
    .any?{ |e| File.extname(e) == '.h' }
end

def idf_path *args
  path = File.join File.realpath(ARGV[0] || ENV['IDF_PATH'] || ''), args
rescue Errno::ENOENT
  raise "idf_path does not exist! (Make sure $IDF_PATH environment is set or use command line parameter.)"
end

def traverse dirs
  dirs.map{ |dir| dirs + traverse(dirs_in dir) }
end

def dirs_with_headers path = idf_path
  traverse(dirs_in path).flatten.uniq
    .select{ |d| has_header_files d }
end

def vscode_includes dwh = dirs_with_headers
  dwh
    .map{ |s| s.gsub(/\/include\/.+/, '/include/') }.uniq	# trim path to /include part
    .map{ |s| s.sub idf_path, '${env:IDF_PATH}/' }
end

def load_local_cpp_properties file = File.join(APP_ROOT, '.vscode', 'c_cpp_properties.json')
  JSON.parse File.read(file)
end

include_paths = vscode_includes(dirs_with_headers.select{ |d| d =~ /include/i })

# binding.pry

puts JSON.pretty_generate(include_paths)