allow switching to a particular board for compilation

Author: ianfixes

CHANGELOG.md

@@ -13,6 +13,7 @@ and this project adheres to [Semantic Versioning](http://semver.org/).
 - `ArduinoCmd` sets preferences
 - `ArduinoCmd` installs boards
 - `ArduinoCmd` installs libraries
+- `ArduinoCmd` selects boards (compiler preference)
 
 ### Changed
 - `DisplayManger.with_display` doesn't `disable` if the display was enabled prior to starting the block

exe/ci_system_check.rb

@@ -29,8 +29,10 @@
 got_problem = true unless arduino_cmd.install_board("arduino:sam")
 got_problem = true unless arduino_cmd.install_library("USBHost")
 got_problem = true unless arduino_cmd.library_is_indexed
-
 got_problem = true unless arduino_cmd.set_pref("compiler.warning_level", "all")
+got_problem = true unless arduino_cmd.use_board!("arduino:sam:arduino_due_x")
+got_problem = true unless arduino_cmd.board_installed?("arduino:sam:arduino_due_x")
+
 
 abort if got_problem
 exit(0)

lib/arduino_ci/arduino_cmd.rb

@@ -137,5 +137,19 @@ def update_library_index
       install_library("USBHost")
     end
 
+    # use a particular board for compilation
+    def use_board(boardname)
+      run_with_gui_guess(" about board not installed", "--board", boardname, "--save-prefs")
+    end
+
+    # use a particular board for compilation, installing it if necessary
+    def use_board!(boardname)
+      return true if use_board(boardname)
+      boardfamily = boardname.split(":")[0..1].join(":")
+      puts "Board '#{boardname}' not found; attempting to install '#{boardfamily}'"
+      return false unless install_board(boardfamily) # guess board family from first 2 :-separated fields
+      use_board(boardname)
+    end
+
   end
 end