From 718cf309b6fdd18281c6bb6fc28789647496f76c Mon Sep 17 00:00:00 2001
From: miguemasx <migue.masx@gmail.com>
Date: Tue, 17 Mar 2020 00:56:35 +0100
Subject: [PATCH] parse lcov file in ruby

---
 lib/coverage_report.rb | 17 ++---------------
 lib/index.rb           |  1 +
 lib/lcov_parse.rb      | 40 ++++++++++++++++++++++++++++++++++++++++
 spec/spec_helper.rb    |  1 +
 4 files changed, 44 insertions(+), 15 deletions(-)
 create mode 100644 lib/lcov_parse.rb

diff --git a/lib/coverage_report.rb b/lib/coverage_report.rb
index 8752daa..1fe17b3 100644
--- a/lib/coverage_report.rb
+++ b/lib/coverage_report.rb
@@ -20,25 +20,12 @@ class CoverageReport
     end
 
     def lcov(report_path, data)
-      lcov_result = execute_lcov_parse(report_path)
-      minumum_percent = data[:min]
-      { 'lines' => { 'covered_percent' => lcov_covered_percent(lcov_result), 'minumum_percent' => minumum_percent } }
+      lcov = LcovParse.new(File.read(report_path))
+      { 'lines' => { 'covered_percent' => lcov.covered_percent, 'minumum_percent' => data[:min] } }
     end
 
     private
 
-    def lcov_covered_percent(lcov_result)
-      lines = lcov_result.map { |r| r['lines']['details'] }.flatten
-      total_lines = lines.count.to_f.round(2)
-      covered_lines = lines.select { |r| r['hit'] >= 1 }.count.to_f
-      ((covered_lines / total_lines) * 100).round(2)
-    end
-
-    def execute_lcov_parse(report_path)
-      bin_path = "#{File.dirname(__FILE__)}/../bin"
-      JSON.parse(`node #{bin_path}/lcov-parse.js #{report_path}`)
-    end
-
     def read_json(path)
       JSON.parse(File.read(path))
     end
diff --git a/lib/index.rb b/lib/index.rb
index e888441..e9df26f 100644
--- a/lib/index.rb
+++ b/lib/index.rb
@@ -7,6 +7,7 @@ require_relative './report_adapter'
 require_relative './github_check_run_service'
 require_relative './github_client'
 require_relative './coverage_report'
+require_relative './lcov_parse'
 
 def read_json(path)
   JSON.parse(File.read(path))
diff --git a/lib/lcov_parse.rb b/lib/lcov_parse.rb
new file mode 100644
index 0000000..bbc66cb
--- /dev/null
+++ b/lib/lcov_parse.rb
@@ -0,0 +1,40 @@
+class LcovParse
+  def initialize(lcov_content)
+    @lcov = lcov_content
+  end
+
+  def to_json
+    @to_json ||= @lcov.split("end_of_record").map do |file_item|
+      file_item.split("\n").reduce({}) do |memo, item|
+        type, value = item.split(":")
+        case type
+        when "DA", "FNF", "FNH", "LF", "LH", "FN", "FNDA", "BRDA", "BRF", "BRH"
+          memo[type] = [] unless memo[type]
+          memo[type].push(value&.strip)
+        when "TN", "SF"
+          memo[type] = value
+        end
+        memo
+      end
+    end
+  end
+
+  def lines
+    @lines ||=
+      to_json.map{|it| it["DA"] }
+        .flatten.compact
+        .map{|it| it.split(",").last }
+  end
+
+  def total_lines
+    lines.count
+  end
+
+  def covered_lines
+    lines.select{|it| it == "1" }.count
+  end
+
+  def covered_percent
+    ((covered_lines / total_lines.to_f) * 100).round(2)
+  end
+end
diff --git a/spec/spec_helper.rb b/spec/spec_helper.rb
index be4f8ff..3b2a6a8 100644
--- a/spec/spec_helper.rb
+++ b/spec/spec_helper.rb
@@ -7,3 +7,4 @@ require './lib/report_adapter'
 require './lib/github_check_run_service'
 require './lib/github_client'
 require './lib/coverage_report'
+require './lib/lcov_parse'