resolves #213 set up Rubocop

.github/workflows/ci.yml

@@ -5,6 +5,18 @@ on:
     tags-ignore: [ '**' ]
   pull_request:
 jobs:
+  rubocop:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v2
+      - name: Set up Ruby
+        uses: ruby/setup-ruby@v1
+        with:
+          ruby-version: '3.0'
+          bundler-cache: true
+      - name: Rubocop
+        run: bundle exec rubocop
   build:
     strategy:
       matrix:

.rubocop.yml

@@ -0,0 +1,18 @@
+Metrics/AbcSize:
+  Enabled: false
+Metrics/BlockLength:
+  Enabled: false
+Metrics/ClassLength:
+  Enabled: false
+Metrics/CyclomaticComplexity:
+  Enabled: false
+Layout/LineLength:
+  Max: 120
+Metrics/MethodLength:
+  Enabled: false
+Security/MarshalLoad:
+  Enabled: false
+Style/StructInheritance:
+  Enabled: false
+Style/Documentation:
+  Enabled: false

Rakefile

@@ -9,8 +9,6 @@ task default: :test
 # Packaging
 # ==========================================================
 
-GEMSPEC = eval(File.read('pygments.rb.gemspec'))
-
 require 'rubygems/package_task'
 
 # ==========================================================
@@ -36,7 +34,7 @@ end
 
 # Write all the lexers to a file for easy lookup
 task :lexers do
-  sh 'ruby cache-lexers.rb'
+  sh 'ruby cache_lexers.rb'
 end
 
 task(:test).enhance([:lexers])

bench.rb

@@ -3,7 +3,6 @@
 require File.join(File.dirname(__FILE__), '/lib/pygments.rb')
 require 'benchmark'
 
-include Benchmark
 # number of iterations
 num = ARGV[0] ? ARGV[0].to_i : 10
 
@@ -17,7 +16,13 @@
 puts 'Iterations: ' + num.to_s + "\n"
 
 Benchmark.bm(40) do |x|
-  x.report('pygments popen                             ')  { (1..num).each { |_i|; Pygments.highlight(code, lexer: 'python'); } }
-  x.report('pygments popen (process already started)   ')  { (1..num).each { |_i|; Pygments.highlight(code, lexer: 'python'); } }
-  x.report('pygments popen (process already started 2) ')  { (1..num).each { |_i|; Pygments.highlight(code, lexer: 'python'); } }
+  x.report('pygments popen                             ') do
+    (1..num).each { |_i|; Pygments.highlight(code, lexer: 'python'); }
+  end
+  x.report('pygments popen (process already started)   ') do
+    (1..num).each { |_i|; Pygments.highlight(code, lexer: 'python'); }
+  end
+  x.report('pygments popen (process already started 2) ') do
+    (1..num).each { |_i|; Pygments.highlight(code, lexer: 'python'); }
+  end
 end

lib/pygments/lexer.rb

@@ -30,7 +30,7 @@ def self.create(hash)
         extnames = []
 
         extname = File.extname(filename)
-        if m = extname.match(/\[(.+)\]/)
+        if (m = extname.match(/\[(.+)\]/))
           m[1].scan(/./).each do |s|
             extnames << extname.sub(m[0], s)
           end