summaryrefslogtreecommitdiff
path: root/tool/extlibs.rb
blob: 33462ceb1d432e20baadcc0fddd3059c1424a41d (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
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
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
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
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
#!/usr/bin/ruby

# Used to download, extract and patch extension libraries (extlibs)
# for Ruby. See common.mk for Ruby's usage.

require 'digest'
require_relative 'downloader'
require_relative 'lib/colorize'

class Vars < Hash
  def pattern
    /\$\((#{Regexp.union(keys)})\)/
  end

  def expand(str)
    if empty?
      str
    else
      str.gsub(pattern) {self[$1]}
    end
  end
end

class ExtLibs
  def initialize
    @colorize = Colorize.new
  end

  def cache_file(url, cache_dir)
    Downloader.cache_file(url, nil, cache_dir).to_path
  end

  def do_download(url, cache_dir)
    Downloader.download(url, nil, nil, nil, :cache_dir => cache_dir)
  end

  def do_checksum(cache, chksums)
    chksums.each do |sum|
      name, sum = sum.split(/:/)
      if $VERBOSE
        $stdout.print "checking #{name} of #{cache} ..."
        $stdout.flush
      end
      hd = Digest(name.upcase).file(cache).hexdigest
      if $VERBOSE
        $stdout.print " "
        $stdout.puts hd == sum ? @colorize.pass("OK") : @colorize.fail("NG")
        $stdout.flush
      end
      unless hd == sum
        raise "checksum mismatch: #{cache}, #{name}:#{hd}, expected #{sum}"
      end
    end
  end

  def do_extract(cache, dir)
    if $VERBOSE
      $stdout.puts "extracting #{cache} into #{dir}"
      $stdout.flush
    end
    ext = File.extname(cache)
    case ext
    when '.gz', '.tgz'
      f = IO.popen(["gzip", "-dc", cache])
      cache = cache.chomp('.gz')
    when '.bz2', '.tbz'
      f = IO.popen(["bzip2", "-dc", cache])
      cache = cache.chomp('.bz2')
    when '.xz', '.txz'
      f = IO.popen(["xz", "-dc", cache])
      cache = cache.chomp('.xz')
    else
      inp = cache
    end
    inp ||= f.binmode
    ext = File.extname(cache)
    case ext
    when '.tar', /\A\.t[gbx]z\z/
      pid = Process.spawn("tar", "xpf", "-", in: inp, chdir: dir)
    when '.zip'
      pid = Process.spawn("unzip", inp, "-d", dir)
    end
    f.close if f
    Process.wait(pid)
    $?.success? or raise "failed to extract #{cache}"
  end

  def do_patch(dest, patch, args)
    if $VERBOSE
      $stdout.puts "applying #{patch} under #{dest}"
      $stdout.flush
    end
    Process.wait(Process.spawn("patch", "-d", dest, "-i", patch, *args))
    $?.success? or raise "failed to patch #{patch}"
  end

  def do_link(file, src, dest)
    file = File.join(dest, file)
    if (target = src).start_with?("/")
      target = File.join([".."] * file.count("/"), src)
    end
    File.unlink(file) rescue nil
    begin
      File.symlink(target, file)
    rescue
    else
      if $VERBOSE
        $stdout.puts "linked #{target} to #{file}"
        $stdout.flush
      end
      return
    end
    begin
      src = src.sub(/\A\//, '')
      File.copy_stream(src, file)
    rescue
      if $VERBOSE
        $stdout.puts "failed to link #{src} to #{file}: #{$!.message}"
      end
    else
      if $VERBOSE
        $stdout.puts "copied #{src} to #{file}"
      end
    end
  end

  def do_command(mode, dest, url, cache_dir, chksums)
    extracted = false
    base = /.*(?=\.tar(?:\.\w+)?\z)/

    case mode
    when :download
      cache = do_download(url, cache_dir)
      do_checksum(cache, chksums)
    when :extract
      cache = cache_file(url, cache_dir)
      target = File.join(dest, File.basename(cache)[base])
      unless File.directory?(target)
        do_checksum(cache, chksums)
        extracted = do_extract(cache, dest)
      end
    when :all
      cache = do_download(url, cache_dir)
      target = File.join(dest, File.basename(cache)[base])
      unless File.directory?(target)
        do_checksum(cache, chksums)
        extracted = do_extract(cache, dest)
      end
    end
    extracted
  end

  def run(argv)
    cache_dir = nil
    mode = :all
    until argv.empty?
      case argv[0]
      when '--download'
        mode = :download
      when '--extract'
        mode = :extract
      when '--patch'
        mode = :patch
      when '--all'
        mode = :all
      when '--cache'
        argv.shift
        cache_dir = argv[0]
      when /\A--cache=/
        cache_dir = $'
      when '--'
        argv.shift
        break
      when /\A-/
        warn "unknown option: #{argv[0]}"
        return false
      else
        break
      end
      argv.shift
    end

    success = true
    argv.each do |dir|
      Dir.glob("#{dir}/**/extlibs") do |list|
        if $VERBOSE
          $stdout.puts "downloading for #{list}"
          $stdout.flush
        end
        vars = Vars.new
        extracted = false
        dest = File.dirname(list)
        url = chksums = nil
        IO.foreach(list) do |line|
          line.sub!(/\s*#.*/, '')
          if /^(\w+)\s*=\s*(.*)/ =~ line
            vars[$1] = vars.expand($2)
            next
          end
          if chksums
            chksums.concat(line.split)
          elsif /^\t/ =~ line
            if extracted and (mode == :all or mode == :patch)
              patch, *args = line.split.map {|s| vars.expand(s)}
              do_patch(dest, patch, args)
            end
            next
          elsif /->/ =~ line
            if extracted and (mode == :all or mode == :patch)
              link, file = $`.strip, $'.strip
              do_link(vars.expand(link), vars.expand(file), dest)
            end
            next
          else
            url, *chksums = line.split(' ')
          end
          if chksums.last == '\\'
            chksums.pop
            next
          end
          unless url
            chksums = nil
            next
          end
          url = vars.expand(url)
          begin
            extracted = do_command(mode, dest, url, cache_dir, chksums)
          rescue => e
            warn e.inspect
            success = false
          end
          url = chksums = nil
        end
      end
    end
    success
  end

  def self.run(argv)
    self.new.run(argv)
  end
end

if $0 == __FILE__
  exit ExtLibs.run(ARGV)
end