Add xdg_base package

packages/xdg_base.rb

+require 'package'
+
+class Xdg_base < Package
+  description 'XDG Base Directory Specification Configuration'
+  homepage 'https://standards.freedesktop.org/basedir-spec/basedir-spec-latest.html'
+  version '0.7'
+  source_url 'https://standards.freedesktop.org/basedir-spec/basedir-spec-latest.html'
+  source_sha256 '342289ad33b48b8f643278f74cafa182f4471d490b82dc5e442e2e720fa4080f'
+
+  def self.install
+    # Changes the ~/.config and ~/.local directories to use symlinks instead.
+    # This is needed in cases when executables are installed in these locations.
+    system "mkdir -p #{CREW_DEST_DIR}$HOME"
+    system "mkdir -p #{CREW_DEST_PREFIX}/.config"
+    system "mkdir -p #{CREW_DEST_PREFIX}/.local"
+    system "ln -s #{CREW_PREFIX}/.config #{CREW_DEST_DIR}$HOME/.config"
+    system "ln -s #{CREW_PREFIX}/.local #{CREW_DEST_DIR}$HOME/.local"
+    system "ln -s #{CREW_PREFIX}/.config $HOME/.config"
+    system "ln -s #{CREW_PREFIX}/.config $HOME/.local"
+  end
+
+  def self.postinstall
+    puts
+    puts "The following bash environment variables should set as shown below:".lightblue
+    puts "echo '# XDG Base Directory Specification Environment Variables' >> ~/.bashrc".lightblue
+    puts "echo '# See https://standards.freedesktop.org/basedir-spec/basedir-spec-latest.html.' >> ~/.bashrc".lightblue
+    puts "echo 'export XDG_DATA_HOME=\$HOME/.local/share' >> ~/.bashrc".lightblue
+    puts "echo 'export XDG_CONFIG_HOME=\$HOME/.config' >> ~/.bashrc".lightblue
+    puts "echo 'export XDG_DATA_DIRS=#{CREW_PREFIX}/share' >> ~/.bashrc".lightblue
+    puts "echo 'export XDG_CONFIG_DIRS=#{CREW_PREFIX}/etc/xdg' >> ~/.bashrc".lightblue
+    puts "echo 'export XDG_CACHE_HOME=\$HOME/.cache' >> ~/.bashrc".lightblue
+    puts "source ~/.bashrc".lightblue
+    puts
+  end
+end