Class: Epdiff

Inherits:
Object
  • Object
show all
Defined in:
lib/epdiff.rb,
lib/epdiff/version.rb

Overview

EPUB diff class

Constant Summary collapse

TEXT_EXT = 
%w[xhtml html xml opf css txt].freeze
VERSION = 
'2.0.0'

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize ⇒ Epdiff

Returns a new instance of Epdiff.



19
20
21
22
23
24
25
 
# File 'lib/epdiff.rb', line 19

def initialize
  @pastel = Pastel.new(enabled: true)
  @green = @pastel.green.detach
  @red = @pastel.red.detach
  @cyan = @pastel.cyan.detach
  @color = true
end

Class Method Details

.execute(*args) ⇒ Object 



15
16
17
 
# File 'lib/epdiff.rb', line 15

def self.execute(*args)
  new.execute(*args)
end

Instance Method Details

#binary_diff(path, path1, path2) ⇒ Object 



86
87
88
89
90
91
92
93
94
95
 
# File 'lib/epdiff.rb', line 86

def binary_diff(path, path1, path2)
  content1 = File.binread(path1)
  content2 = File.binread(path2)

  return if content1 == content2

  @exit_code = 1
  message = "DIFF: #{path} has some differences.\n"
  print @color ? @cyan.call(message) : message
end

#execute(*args) ⇒ Object 



97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
 
# File 'lib/epdiff.rb', line 97

def execute(*args)
  tmpdir = work_dir = nil

  options = OptionParser.new do |opts|
    opts.banner = "Usage: epdiff [options] [filename] [filename]\n"

    opts.on('-t', '--tmpdir DIR', 'Set tepmorary directory') do |dir|
      tmpdir = dir
    end

    opts.on('-h', '--help', 'Show this help message') do
      puts opts
      exit
    end

    opts.on('-C', '--no-color', 'Not use color diff') do
      @color = false
    end

    opts.on('-v', '--version', 'Show version number') do
      puts Epdiff::VERSION
      exit
    end
  end

  begin
    options.parse!(args)

    if args.size != 2
      # invalid option
      puts options
      exit
    end

    work_dir = tmpdir || Dir.mktmpdir

    file1, file2 = *args
    FileUtils.mkdir_p("#{work_dir}/file1")
    FileUtils.mkdir_p("#{work_dir}/file2")

    unzip(file1, "#{work_dir}/file1")
    unzip(file2, "#{work_dir}/file2")

    @exit_code = 0
    show_diff(file1, file2, work_dir)

    @exit_code
  rescue StandardError => e
    warn e
  ensure
    FileUtils.rm_rf(work_dir) if work_dir && !tmpdir
  end
end

#show_diff(_file1, _file2, work_dir) ⇒ Object 



39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
 
# File 'lib/epdiff.rb', line 39

def show_diff(_file1, _file2, work_dir)
  Dir.chdir(work_dir) do
    files1 = Dir.glob('file1/**/*')
    files2 = Dir.glob('file2/**/*')
    files1_s = files1.map { |d| d.sub(%r{^file1/}, '') }
    files2_s = files2.map { |d| d.sub(%r{^file2/}, '') }
    files_common = files1_s & files2_s
    files_common.each do |path|
      if File.file?("file1/#{path}")
        if text_file?("file1/#{path}")
          text_diff(path, "file1/#{path}", "file2/#{path}")
        else
          binary_diff(path, "file1/#{path}", "file2/#{path}")
        end
      end
    end
    (files1_s - files2_s).each do |diff1|
      @exit_code = 1
      message = "DIFF: #{diff1} only exists in 1st.\n"
      print @color ? @red.call(message) : message
    end
    (files2_s - files1_s).each do |diff2|
      @exit_code = 1
      message = "DIFF: #{diff2} only exists in 2nd.\n"
      print @color ? @green.call(message) : message
    end
  end
end

#text_diff(_path, path1, path2) ⇒ Object 



73
74
75
76
77
78
79
80
81
82
83
84
 
# File 'lib/epdiff.rb', line 73

def text_diff(_path, path1, path2)
  diff = if @color
           TTY::File.diff(path1, path2, verbose: false)
         else
           TTY::File.diff(path1, path2, verbose: false, color: nil)
         end

  return if diff == "No differences found\n" || diff.strip == ''

  @exit_code = 1
  print diff
end

#text_file?(path) ⇒ Boolean

Returns:

  • (Boolean) 


68
69
70
71
 
# File 'lib/epdiff.rb', line 68

def text_file?(path)
  extname = File.extname(path).sub(/\A\./, '')
  extname if TEXT_EXT.include?(extname)
end

#unzip(filename, dir) ⇒ Object 



27
28
29
30
31
32
33
34
35
36
37
 
# File 'lib/epdiff.rb', line 27

def unzip(filename, dir)
  Zip::InputStream.open(filename) do |zio|
    while entry = zio.get_next_entry # rubocop:disable Lint/AssignmentInCondition
      next unless entry.file?

      entry_filename = File.join(dir, entry.name)
      FileUtils.mkdir_p File.dirname(entry_filename)
      File.binwrite(entry_filename, zio.read)
    end
  end
end