rubocop -A

Gemfile

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 source 'http://rubygems.org'
 
 gemspec

bin/git-format-staged

@@ -1,4 +1,6 @@
 #!/usr/bin/env ruby
+# frozen_string_literal: true
+
 require 'format-staged'
 require 'optparse'
 
@@ -46,7 +48,7 @@ end
 parser.parse!
 parameters[:patterns] = ARGV
 
-if !parameters[:formatter] or parameters[:patterns].empty?
+if !parameters[:formatter] || parameters[:patterns].empty?
   puts 'Missing formatter or file patterns!'
 
   puts parser

format-staged.gemspec

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 lib = File.expand_path('lib', __dir__)
 $LOAD_PATH.unshift(lib) unless $LOAD_PATH.include?(lib)
 require 'format-staged/version'
@@ -13,6 +15,7 @@ Gem::Specification.new do |s|
   s.executables << 'git-format-staged'
   s.homepage    = 'https://github.com/5sw/format-staged'
   s.license     = 'MIT'
+  s.required_ruby_version = '2.7'
 
   s.add_development_dependency 'rubocop', '~> 1.29'
 end

lib/format-staged.rb

@@ -1,3 +1,6 @@
+# frozen_string_literal: true
+
+require 'English'
 require 'format-staged/version'
 require 'format-staged/entry'
 require 'format-staged/io'
@@ -19,7 +22,7 @@ class FormatStaged
 
     files = get_output('git', 'diff-index', '--cached', '--diff-filter=AM', '--no-renames', 'HEAD')
             .map { |line| Entry.new(line, root: root) }
-            .reject { |entry| entry.symlink? }
+            .reject(&:symlink?)
             .filter { |entry| entry.matches?(@patterns) }
 
     files.each do |file|
@@ -64,7 +67,7 @@ class FormatStaged
     pid2, r = pipe_command format_command, source: r
     pid3, r = pipe_command 'git', 'hash-object', '-w', '--stdin', source: r
 
-    result = r.readlines.map { |it| it.chomp }
+    result = r.readlines.map(&:chomp)
     if @verbose
       result.each do |line|
         puts "< #{line}"
@@ -72,20 +75,20 @@ class FormatStaged
     end
 
     Process.wait pid1
-    raise "Cannot read #{file.dst_hash} from object database" unless $?.success?
+    raise "Cannot read #{file.dst_hash} from object database" unless $CHILD_STATUS.success?
 
     Process.wait pid2
-    raise "Error formatting #{file.src_path}" unless $?.success?
+    raise "Error formatting #{file.src_path}" unless $CHILD_STATUS.success?
 
     Process.wait pid3
-    raise 'Error writing formatted file back to object database' unless $?.success? && !result.empty?
+    raise 'Error writing formatted file back to object database' unless $CHILD_STATUS.success? && !result.empty?
 
     result.first
   end
 
   def object_is_empty(hash)
     size = get_output('git', 'cat-file', '-s', hash).first.to_i
-    size == 0
+    size.zero?
   end
 
   def patch_working_file(file, new_hash)
@@ -100,7 +103,7 @@ class FormatStaged
     patch_out.close
 
     Process.wait pid
-    raise 'Error applying patch' unless $?.success?
+    raise 'Error applying patch' unless $CHILD_STATUS.success?
   end
 
   def replace_file_in_index(file, new_hash)

lib/format-staged/entry.rb

@@ -1,6 +1,8 @@
+# frozen_string_literal: true
+
 class FormatStaged
   class Entry
-    PATTERN = /^:(?<src_mode>\d+) (?<dst_mode>\d+) (?<src_hash>[a-f0-9]+) (?<dst_hash>[a-f0-9]+) (?<status>[A-Z])(?<score>\d+)?\t(?<src_path>[^\t]+)(?:\t(?<dst_path>[^\t]+))?$/
+    PATTERN = /^:(?<src_mode>\d+) (?<dst_mode>\d+) (?<src_hash>[a-f0-9]+) (?<dst_hash>[a-f0-9]+) (?<status>[A-Z])(?<score>\d+)?\t(?<src_path>[^\t]+)(?:\t(?<dst_path>[^\t]+))?$/.freeze
 
     attr_reader :src_mode, :dst_mode, :src_hash, :dst_hash, :status, :score, :src_path, :dst_path, :path, :root
 

lib/format-staged/io.rb

@@ -1,22 +1,25 @@
+# frozen_string_literal: true
+
+require 'English'
 class FormatStaged
   def get_output(*args, lines: true)
-    puts '> ' + args.join(' ') if @verbose
+    puts "> #{args.join(' ')}" if @verbose
 
     output = IO.popen(args, err: :err) do |io|
       if lines
-        io.readlines.map { |l| l.chomp }
+        io.readlines.map(&:chomp)
       else
         io.read
       end
     end
 
-    if @verbose and lines
+    if @verbose && lines
       output.each do |line|
         puts "< #{line}"
       end
     end
 
-    raise 'Failed to run command' unless $?.success?
+    raise 'Failed to run command' unless $CHILD_STATUS.success?
 
     output
   end

lib/format-staged/version.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class FormatStaged
   VERSION = '0.0.1'
 end