Add deployer package (#4000)

Add postinstall section

Add pre-built binaries

packages/deployer.rb

+require 'package'
+
+class Deployer < Package
+  description 'A deployment tool for PHP'
+  homepage 'https://deployer.org/'
+  version '6.7.3'
+  source_url 'https://github.com/deployphp/deployer/archive/v6.7.3.tar.gz'
+  source_sha256 '81e5cea09f68b898d72a52ea6c4401fbc4cc1bc2fc30d488acce6e8fdef59d79'
+
+  binary_url ({
+    aarch64: 'https://dl.bintray.com/chromebrew/chromebrew/deployer-6.7.3-chromeos-armv7l.tar.xz',
+     armv7l: 'https://dl.bintray.com/chromebrew/chromebrew/deployer-6.7.3-chromeos-armv7l.tar.xz',
+       i686: 'https://dl.bintray.com/chromebrew/chromebrew/deployer-6.7.3-chromeos-i686.tar.xz',
+     x86_64: 'https://dl.bintray.com/chromebrew/chromebrew/deployer-6.7.3-chromeos-x86_64.tar.xz',
+  })
+  binary_sha256 ({
+    aarch64: 'e5a87eefab63f035398a2cfd2d4682ae6e95dc608c405242da8c60bcce2798db',
+     armv7l: 'e5a87eefab63f035398a2cfd2d4682ae6e95dc608c405242da8c60bcce2798db',
+       i686: 'c68fad1a58417c09c4c1c49a2c474641378027a83e98ad159ca53780311d160e',
+     x86_64: '57f072d4617d8dae9ab0d071aa5a29c66fb8453d08e9559a658d7c450a82f2dd',
+  })
+
+  depends_on 'php74' unless File.exists? "#{CREW_PREFIX}/bin/php"
+  depends_on 'composer' => :build
+
+  def self.install
+    system 'composer install'
+    FileUtils.mkdir_p "#{CREW_DEST_PREFIX}/bin"
+    FileUtils.mkdir_p "#{CREW_DEST_PREFIX}/share"
+    FileUtils.cp_r Dir.pwd, "#{CREW_DEST_PREFIX}/share"
+    FileUtils.ln_s "#{CREW_PREFIX}/share/deployer-#{version}/bin/dep", "#{CREW_DEST_PREFIX}/bin/dep"
+  end
+
+  def self.postinstall
+    puts
+    puts "To get started, execute 'dep'".lightblue
+    puts
+  end
+end