add 'rake watch' tasks

Add two 'rake watch' tasks:

- 'rake watch:server'
Watch for changes using the Ruby web server.

- 'rake watch:deploy:local'
Watch for changes using a local web server (eg nginx).

Fix #24

Gemfile

@@ -4,7 +4,7 @@ source "https://rubygems.org"
 gem "nanoc", "~> 4.12"
 gem "nanoc-live", "~> 1.0"
 gem "nanoc-gunzip.rb", "~> 0.1"
-gem "nanoc-webpack.rb", "~> 0.1", git: "https://github.com/0x1eef/nanoc-webpack.rb", branch: "feat/depends_on"
+gem "nanoc-webpack.rb", "~> 0.1"
 gem "rainpress", "~> 1.0"
 gem "sass"
 gem "standardrb"
@@ -13,3 +13,8 @@ gem "paint"
 gem "dotenv"
 gem "adsf"
 gem "puma"
+
+require 'rbconfig'
+if RbConfig::CONFIG['target_os'] =~ /(?i-mx:bsd|dragonfly)/
+  gem 'rb-kqueue', '>= 0.2'
+end

Gemfile.lock

@@ -1,11 +1,3 @@
-GIT
-  remote: https://github.com/0x1eef/nanoc-webpack.rb
-  revision: d610596e4b3c0e83922cf0b80d2b40ec94d39b84
-  branch: feat/depends_on
-  specs:
-    nanoc-webpack.rb (0.1.0)
-      ryo.rb (~> 0.3)
-
 GEM
   remote: https://rubygems.org/
   specs:
@@ -80,6 +72,8 @@ GEM
       listen (~> 3.0)
       nanoc-cli (~> 4.11, >= 4.11.14)
       nanoc-core (~> 4.11, >= 4.11.14)
+    nanoc-webpack.rb (0.1.0)
+      ryo.rb (~> 0.3)
     nio4r (2.5.8)
     paint (2.3.0)
     parallel (1.22.1)
@@ -100,6 +94,8 @@ GEM
     rb-fsevent (0.11.2)
     rb-inotify (0.10.1)
       ffi (~> 1.0)
+    rb-kqueue (0.2.8)
+      ffi (>= 0.5.0)
     regexp_parser (2.6.0)
     rexml (3.2.5)
     rubocop (1.35.1)
@@ -150,10 +146,11 @@ DEPENDENCIES
   nanoc (~> 4.12)
   nanoc-gunzip.rb (~> 0.1)
   nanoc-live (~> 1.0)
-  nanoc-webpack.rb (~> 0.1)!
+  nanoc-webpack.rb (~> 0.1)
   paint
   puma
   rainpress (~> 1.0)
+  rb-kqueue (>= 0.2)
   ryo.rb
   sass
   standardrb

Rakefile.rb

@@ -2,14 +2,17 @@
 
 require "bundler/setup"
 require "ryo"
+require "listen"
 require_relative "lib/tasks"
 include Tasks
 
 namespace :nanoc do
+  desc "Compile the website"
   task :compile do
     sh "nanoc co"
   end
 
+  desc "Delete the build directory"
   task :clean do
     build_dir = Ryo.from(YAML.load_file("./nanoc.yaml")).output_dir
     sh "rm -rf #{build_dir}"
@@ -17,38 +20,65 @@ namespace :nanoc do
 end
 task build: "nanoc:compile"
 
+desc "Start a Ruby web server on localhost"
 task server: ["nanoc:compile"] do
   Dir.chdir(File.join(Dir.getwd, "build", "al-quran")) do
     sh "ruby -S bundle exec adsf"
   end
 end
 
+namespace :watch do
+  desc "Watch for changes (server task)"
+  task :server do
+    Listen.to(File.join(Dir.getwd, "src")) do
+      Rake::Task["build"].invoke
+    end.start
+    Rake::Task["server"].invoke
+  end
+
+  namespace :deploy do
+    desc "Watch for changes (deploy:local task)"
+    task :local do
+      Listen.to(File.join(Dir.getwd, "src")) do
+        Rake::Task["deploy:local"].invoke
+      end.start
+      sleep
+    end
+  end
+end
+
 namespace :deploy do
+  desc "Deploy to a local web server (eg nginx)"
   task local: ["env:development", "nanoc:compile"] do
     Deploy::Local.call
   end
 
+  desc "Deploy to production"
   task remote: ["env:production", "nanoc:clean", "nanoc:compile"] do
     Deploy::Remote.call
   end
 end
 
 namespace :env do
+  desc "Set environment variables for the production environment"
   task :production do
     require "dotenv"
     Dotenv.load
   end
 
+  desc "Set environment variables for the development environment"
   task :development do
     ENV["NODE_ENV"] ||= "development"
   end
 end
 
 namespace :linter do
+  desc "Run the Ruby linter"
   task :ruby do
     sh "bundle exec rubocop lib/ src/"
   end
 
+  desc "Run the TypeScript linter"
   task :typescript do
     sh "npm run eslint"
   end