add index page

lib/gcovinator.rb

@@ -1,6 +1,7 @@
 require_relative "gcovinator/file_coverage"
 require_relative "gcovinator/file_report"
 require_relative "gcovinator/gcov_parser"
+require_relative "gcovinator/index_report"
 require_relative "gcovinator/version"
 require "fileutils"
 require "open3"
@@ -39,6 +40,7 @@ module Gcovinator
       file_reports = file_coverages.each_with_index.map do |(source_file_name, file_coverage), i|
         FileReport.new(source_file_name, file_coverage, source_dirs, output_dir, sprintf("s%04d.html", i))
       end
+      IndexReport.new(output_dir, file_reports)
     end
 
   end

lib/gcovinator/file_report.rb

@@ -1,6 +1,13 @@
 module Gcovinator
   class FileReport
 
+    attr_reader :total_lines
+    attr_reader :covered_lines
+    attr_reader :total_branches
+    attr_reader :covered_branches
+    attr_reader :source_file_name
+    attr_reader :report_file_name
+
     def initialize(source_file_name, file_coverage, source_dirs, output_dir, report_file_name)
       @source_file_name = clean_source_file_name(source_file_name, source_dirs)
       @report_file_name = report_file_name

lib/gcovinator/index_report.rb

@@ -0,0 +1,36 @@
+module Gcovinator
+  class IndexReport
+
+    def initialize(output_dir, file_reports)
+      @total_lines = 0
+      @covered_lines = 0
+      @total_branches = 0
+      @covered_branches = 0
+      run(File.join(output_dir, "index.html"), file_reports)
+    end
+
+    private
+
+    def run(output_file_name, file_reports)
+      analyze(file_reports)
+      require "cgi"
+      require "erb"
+      index_report_template = File.read(File.join(File.dirname(__FILE__), "../../assets/index_report.html.erb"))
+      erb = ERB.new(index_report_template, nil, "<>")
+      report = erb.result(binding.clone)
+      File.open(output_file_name, "w") do |fh|
+        fh.write(report)
+      end
+    end
+
+    def analyze(file_reports)
+      file_reports.each do |file_report|
+        @total_lines += file_report.total_lines
+        @covered_lines += file_report.covered_lines
+        @total_branches += file_report.total_branches
+        @covered_branches += file_report.covered_branches
+      end
+    end
+
+  end
+end