feat(experimental): minify js files using esbuild

scripts/minify-js.cr

@@ -0,0 +1,96 @@
+require "http"
+require "colorize"
+
+ESBUILD_VERSION = "0.25.0"
+
+esbuild_os = ""
+esbuild_arch = ""
+
+# https://esbuild.github.io/getting-started/#other-ways-to-install
+{% if flag?(:linux) %}
+  esbuild_os = "linux"
+{% elsif flag?(:windows) %}
+  esbuild_os = "win32"
+{% elsif flag?(:darwin) %}
+  esbuild_os = "darwin"
+{% elsif flag?(:freebsd) %}
+  esbuild_os = "freebsd"
+{% elsif flag?(:openbsd) %}
+  esbuild_os = "openbsd"
+{% elsif flag?(:netbsd) %}
+  esbuild_os = "netbsd"
+{% elsif flag?(:solaris) %}
+  esbuild_os = "sunos"
+{% else %}
+  esbuild_os = "linux"
+{% end %}
+
+{% if flag?(:x86_64) %}
+  esbuild_arch = "x64"
+{% elsif flag?(:arm64) %}
+  esbuild_arch = "arm64"
+{% else %}
+  esbuild_arch = "x64"
+{% end %}
+
+tmp_dir_path = "#{Dir.tempdir}/invidious-esbuild-binary"
+esbuild_tar_location = "#{tmp_dir_path}/esbuild-#{esbuild_os}-#{esbuild_os}-#{ESBUILD_VERSION}.tgz"
+esbuild_binary_location = "#{tmp_dir_path}/package/bin/esbuild"
+Dir.mkdir(tmp_dir_path) if !Dir.exists? tmp_dir_path
+
+esbuild_url = "https://registry.npmjs.org/@esbuild/#{esbuild_os}-#{esbuild_arch}/-/#{esbuild_os}-#{esbuild_arch}-#{ESBUILD_VERSION}.tgz"
+
+# Download esbuild binary
+HTTP::Client.get(esbuild_url) do |response|
+  puts "Downloading esbuild from #{esbuild_url}"
+  data = response.body_io.gets_to_end
+  File.write(esbuild_tar_location, data)
+
+  `tar -vzxf '#{esbuild_tar_location}' -C '#{tmp_dir_path}'`
+  raise "Extraction for #{esbuild_tar_location} failed" if !$?.success?
+  puts "esbuild downloaded successfully"
+end
+
+files_to_minify = [
+  "_helpers.js",
+  "comments.js",
+  "embed.js",
+  "handlers.js",
+  "notifications.js",
+  "pagination.js",
+  "playlist_widget.js",
+  "post.js",
+  "sse.js",
+  "themes.js",
+  "watch.js",
+  "player.js",
+  "watched_indicator.js",
+  "watched_widget.js",
+]
+
+files_to_minify.each do |file|
+  file_path = "assets/js/#{file}"
+  outdir = "assets/js/minified"
+  process_output = IO::Memory.new
+
+  process = Process.run("#{esbuild_binary_location}", error: process_output, args: [
+    file_path,
+    "--color=false",
+    "--sourcemap",
+    "--minify",
+    "--outdir=#{outdir}",
+  ]
+  )
+
+  if process.success?
+    puts "Minified #{file}".colorize(:green)
+  elsif !process.success?
+    puts "Failed to minify #{file}, esbuild exited with exit code #{process.exit_code}: #{process_output.to_s.split("\n").first}".colorize(:red)
+    raise Exception.new("All files have to be minified sucessfully in order to compile!")
+  end
+end
+
+puts "Minify done!"
+
+# Cleanup
+`rm -rf #{tmp_dir_path}`