Add support for extracting code files from C++ libs

Author: ianfixes

lib/arduino_ci.rb

@@ -1,5 +1,6 @@
 require "arduino_ci/version"
 require "arduino_ci/arduino_installation"
+require "arduino_ci/cpp_library"
 
 # ArduinoCI contains classes for automated testing of Arduino code on the command line
 # @author Ian Katz <[email protected]>

lib/arduino_ci/cpp_library.rb

@@ -0,0 +1,29 @@
+require 'find'
+require "arduino_ci/host"
+
+HPP_EXTENSIONS = [".hpp", ".hh", ".h", ".hxx", ".h++"].freeze
+CPP_EXTENSIONS = [".cpp", ".cc", ".c", ".cxx", ".c++"].freeze
+
+module ArduinoCI
+
+  # Information about an Arduino CPP library, specifically for compilation purposes
+  class CppLibrary
+
+    attr_reader :base_dir
+
+    def initialize(base_dir)
+      @base_dir = base_dir
+    end
+
+    def cpp_files
+      Find.find(@base_dir).select { |path| CPP_EXTENSIONS.include?(File.extname(path)) }
+    end
+
+    def header_dirs
+      files = Find.find(@base_dir).select { |path| HPP_EXTENSIONS.include?(File.extname(path)) }
+      files.map { |path| File.dirname(path) }.uniq
+    end
+
+  end
+
+end

spec/cpp_library_spec.rb

@@ -0,0 +1,24 @@
+require "spec_helper"
+
+sampleproj_path = File.join(File.dirname(File.dirname(__FILE__)), "SampleProjects")
+
+RSpec.describe ArduinoCI::CppLibrary do
+  cpp_lib_path = File.join(sampleproj_path, "DoSomething")
+  cpp_library = ArduinoCI::CppLibrary.new(cpp_lib_path)
+  context "cpp_files" do
+    it "finds cpp files in directory" do
+      dosomething_cpp_files = ["DoSomething/do-something.cpp"]
+      relative_paths = cpp_library.cpp_files.map { |f| f.split("SampleProjects/", 2)[1] }
+      expect(relative_paths).to match_array(dosomething_cpp_files)
+    end
+  end
+
+  context "header_dirs" do
+    it "finds directories containing h files" do
+      dosomething_header_dirs = ["DoSomething"]
+      relative_paths = cpp_library.header_dirs.map { |f| f.split("SampleProjects/", 2)[1] }
+      expect(relative_paths).to match_array(dosomething_header_dirs)
+    end
+  end
+
+end