add support for default values for flags and args

Author: DannyBen

lib/bashly/models/command.rb

@@ -55,12 +55,22 @@ def deep_commands
         result
       end
 
+      # Returns an array of all the default Args
+      def default_args
+        args.select &:default
+      end
+
       # If any of this command's subcommands has the default option set to
       # true, this default command will be returned, nil otherwise.
       def default_command
         commands.find { |c| c.default }
       end
 
+      # Returns an array of all the default Flags
+      def default_flags
+        flags.select &:default
+      end
+
       # Returns an array of EnvironmentVariables
       def environment_variables
         return [] unless options["environment_variables"]

lib/bashly/templates/strings.yml

@@ -14,6 +14,7 @@ group: "%{group} Commands:"
 command_shortcut: "Shortcut: %{short}"
 default_command_summary: "%{summary} (default)"
 required: "(required)"
+default: "Default: %{value}"
 
 # Fixed flags help text
 help_flag_text: Show this help

lib/bashly/views/argument/usage.erb

@@ -1,4 +1,7 @@
 # :argument.usage
 echo "  <%= name.upcase %>"
 printf "<%= help.wrap(76).indent(4).sanitize_for_print %>\n"
+<%- if default -%>
+printf "    <%= strings[:default] % { value: default } -%>\n"
+<%- end -%>
 echo

lib/bashly/views/command/default_assignments.erb

@@ -0,0 +1,7 @@
+# :command.default_assignments
+<%- default_args.each do |arg| -%>
+[[ -n ${args[<%= arg.name %>]} ]] || args[<%= arg.name %>]="<%= arg.default %>"
+<%- end -%>
+<%- default_flags.each do |flag| -%>
+[[ -n ${args[<%= flag.long %>]} ]] || args[<%= flag.long %>]="<%= flag.default %>"
+<%- end -%>

lib/bashly/views/command/parse_requirements.erb

@@ -11,6 +11,7 @@ parse_requirements() {
 <%= render(:required_args_filter).indent 2 %>
 <%= render(:required_flags_filter).indent 2 %>
 <%= render(:parse_requirements_while).indent 2 %>
+<%= render(:default_assignments).indent 2 %>
 }
 
 <%- commands.each do |command| %>

lib/bashly/views/flag/usage.erb

@@ -1,4 +1,7 @@
 # :flag.usage
 echo "  <%= usage_string extended: true %>"
 printf "<%= help.wrap(76).indent(4).sanitize_for_print %>\n"
+<%- if default -%>
+printf "    <%= strings[:default] % { value: default } -%>\n"
+<%- end -%>
 echo