add ability to build a library with mock arduino headers

Author: ianfixes

.gitignore

@@ -11,3 +11,6 @@ vendor
 
 # rspec failure tracking
 .rspec_status
+
+# C++ stuff
+arduino_ci_built.bin

SampleProjects/DoSomething/do-something.cpp

@@ -1,3 +1,4 @@
+#include <Arduino.h>
 #include <do-something.h>
 int doSomething(void) {
   millis();  // this line is only here to test that we're able to refer to the builtins

cpp/Arduino.h

@@ -0,0 +1,30 @@
+/*
+Mock Arduino.h library.
+
+Where possible, variable names from the Arduino library are used to avoid conflicts
+
+*/
+
+
+#ifndef ARDUINO_CI_ARDUINO
+
+#include "math.h"
+#define ARDUINO_CI_ARDUINO
+
+struct unit_test_state {
+  unsigned long micros;
+};
+
+struct unit_test_state godmode {
+  0, // micros
+};
+
+unsigned long millis() {
+  return godmode.micros / 1000;
+}
+
+unsigned long micros() {
+  return godmode.micros;
+}
+
+#endif

cpp/math.h

@@ -0,0 +1,41 @@
+//abs
+long abs(long x)     { return x > 0 ? x : -x; }
+double fabs(double x) { return x > 0 ? x : -x; }
+
+//max
+long max(long a, long b)       { return a > b ? a : b; }
+double fmax(double a, double b) { return a > b ? a : b; }
+
+//min
+long min(long a, long b)       { return a < b ? a : b; }
+double fmin(double a, double b) { return a < b ? a : b; }
+
+//constrain
+long constrain(long x, long a, long b)         { return max(a, min(b, x)); }
+double constrain(double x, double a, double b) { return max(a, min(b, x)); }
+
+//map
+long map(long x, long in_min, long in_max, long out_min, long out_max)
+{
+  return (x - in_min) * (out_max - out_min) / (in_max - in_min) + out_min;
+}
+
+double map(double x, double in_min, double in_max, double out_min, double out_max)
+{
+  return (x - in_min) * (out_max - out_min) / (in_max - in_min) + out_min;
+}
+
+//sq
+long sq(long x)     { return x * x; }
+double sq(double x) { return x * x; }
+
+// ??? too lazy to sort these now
+//pow
+//sqrt
+
+// http://www.ganssle.com/approx.htm
+// http://www.ganssle.com/approx/sincos.cpp
+//cos
+//sin
+//tan
+

exe/ci_system_check.rb

@@ -47,6 +47,11 @@
 got_problem = true unless arduino_cmd.verify_sketch(simple_sketch)
 
 library_path = File.join(File.dirname(File.dirname(__FILE__)), "SampleProjects", "DoSomething")
+
+puts "verify a library with arduino mocks"
+cpp_library = ArduinoCI::CppLibrary.new(library_path)
+got_problem = true unless cpp_library.build(arduino_cmd)
+
 puts "verify the examples of a library (#{library_path})..."
 puts " - Install the library"
 installed_library_path = arduino_cmd.install_local_library(library_path)

lib/arduino_ci/arduino_installation.rb

@@ -49,26 +49,28 @@ def autolocate_osx
           ]
         end
 
-        ret.gcc_cmd = [File.join(osx_root, "Java", "hardware", "tools", "avr", "bin", "avr-gcc")]
+        hardware_dir = File.join(osx_root, "Java", "hardware")
+        ret.gcc_cmd = [File.join(hardware_dir, "tools", "avr", "bin", "avr-gcc")]
         ret
       end
 
       def autolocate_linux
+        forced_avr = File.join(force_install_location, "hardware", "tools", "avr")
         if USE_BUILDER
           builder_name = "arduino-builder"
           cli_place = Host.which(builder_name)
           unless cli_place.nil?
             ret = ArduinoCmdLinuxBuilder.new
             ret.base_cmd = [cli_place]
-            ret.gcc_cmd = Host.which("avr-gcc")
+            ret.gcc_cmd = [Host.which("avr-gcc")]
             return ret
           end
 
           forced_builder = File.join(force_install_location, builder_name)
           if File.exist?(forced_builder)
             ret = ArduinoCmdLinuxBuilder.new
             ret.base_cmd = [forced_builder]
-            ret.gcc_cmd = [File.join(force_install_location, "hardware", "tools", "avr", "bin", "avr-gcc")]
+            ret.gcc_cmd = [File.join(forced_avr, "bin", "avr-gcc")]
             return ret
           end
         end
@@ -78,15 +80,15 @@ def autolocate_linux
         unless gui_place.nil?
           ret = ArduinoCmdLinux.new
           ret.base_cmd = [gui_place]
-          ret.gcc_cmd = Host.which("avr-gcc")
+          ret.gcc_cmd = [Host.which("avr-gcc")]
           return ret
         end
 
         forced_arduino = File.join(force_install_location, gui_name)
         if File.exist?(forced_arduino)
           ret = ArduinoCmdLinux.new
           ret.base_cmd = [forced_arduino]
-          ret.gcc_cmd = [File.join(force_install_location, "hardware", "tools", "avr", "bin", "avr-gcc")]
+          ret.gcc_cmd = [File.join(forced_avr, "bin", "avr-gcc")]
           return ret
         end
         nil

lib/arduino_ci/cpp_library.rb

@@ -3,6 +3,7 @@
 
 HPP_EXTENSIONS = [".hpp", ".hh", ".h", ".hxx", ".h++"].freeze
 CPP_EXTENSIONS = [".cpp", ".cc", ".c", ".cxx", ".c++"].freeze
+ARDUINO_HEADER_DIR = File.expand_path("../../../cpp", __FILE__)
 
 module ArduinoCI
 
@@ -24,6 +25,15 @@ def header_dirs
       files.map { |path| File.dirname(path) }.uniq
     end
 
+    def build_args
+      ["-I#{ARDUINO_HEADER_DIR}"] + header_dirs.map { |d| "-I#{d}" } + cpp_files
+    end
+
+    def build(arduino_cmd)
+      args = ["-c", "-o", "arduino_ci_built.bin"] + build_args
+      arduino_cmd.run_gcc(*args)
+    end
+
   end
 
 end

spec/cpp_library_spec.rb

@@ -21,4 +21,11 @@
     end
   end
 
+  context "build" do
+    arduino_cmd = ArduinoCI::ArduinoInstallation.autolocate!
+    it "builds libraries" do
+      expect(cpp_library.build(arduino_cmd)).to be true
+    end
+  end
+
 end