Class: Gem::RequestSet::Lockfile::Parser

Inherits:
Object
  • Object
show all
Defined in:
lib/rubygems/request_set/lockfile/parser.rb

Instance Method Summary collapse

Constructor Details

#initialize(tokenizer, set, platforms, filename = nil) ⇒ Parser

Parses lockfiles



6
7
8
9
10
11
 
# File 'lib/rubygems/request_set/lockfile/parser.rb', line 6

def initialize(tokenizer, set, platforms, filename = nil)
  @tokens    = tokenizer
  @filename  = filename
  @set       = set
  @platforms = platforms
end

Instance Method Details

#get(expected_types = nil, expected_value = nil) ⇒ Object

Gets the next token for a Lockfile



44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
 
# File 'lib/rubygems/request_set/lockfile/parser.rb', line 44

def get(expected_types = nil, expected_value = nil) # :nodoc:
  token = @tokens.shift

  if expected_types and not Array(expected_types).include? token.type
    unget token

    message = "unexpected token [#{token.type.inspect}, #{token.value.inspect}], " +
              "expected #{expected_types.inspect}"

    raise Gem::RequestSet::Lockfile::ParseError.new message, token.column, token.line, @filename
  end

  if expected_value and expected_value != token.value
    unget token

    message = "unexpected token [#{token.type.inspect}, #{token.value.inspect}], " +
              "expected [#{expected_types.inspect}, " +
              "#{expected_value.inspect}]"

    raise Gem::RequestSet::Lockfile::ParseError.new message, token.column, token.line, @filename
  end

  token
end

#parse ⇒ Object 



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
 
# File 'lib/rubygems/request_set/lockfile/parser.rb', line 13

def parse
  until @tokens.empty? do
    token = get

    case token.type
    when :section then
      @tokens.skip :newline

      case token.value
      when 'DEPENDENCIES' then
        parse_DEPENDENCIES
      when 'GIT' then
        parse_GIT
      when 'GEM' then
        parse_GEM
      when 'PATH' then
        parse_PATH
      when 'PLATFORMS' then
        parse_PLATFORMS
      else
        token = get until @tokens.empty? or peek.first == :section
      end
    else
      raise "BUG: unhandled token #{token.type} (#{token.value.inspect}) at line #{token.line} column #{token.column}"
    end
  end
end

#parse_DEPENDENCIES ⇒ Object

:nodoc:



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
 
# File 'lib/rubygems/request_set/lockfile/parser.rb', line 69

def parse_DEPENDENCIES # :nodoc:
  while not @tokens.empty? and :text == peek.type do
    token = get :text

    requirements = []

    case peek[0]
    when :bang then
      get :bang

      requirements << pinned_requirement(token.value)
    when :l_paren then
      get :l_paren

      loop do
        op      = get(:requirement).value
        version = get(:text).value

        requirements << "#{op} #{version}"

        break unless peek.type == :comma

        get :comma
      end

      get :r_paren

      if peek[0] == :bang
        requirements.clear
        requirements << pinned_requirement(token.value)

        get :bang
      end
    end

    @set.gem token.value, *requirements

    skip :newline
  end
end

#parse_dependency(name, op) ⇒ Object

Parses the requirements following the dependency name and the op for the first token of the requirements and returns a Gem::Dependency object.



297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
 
# File 'lib/rubygems/request_set/lockfile/parser.rb', line 297

def parse_dependency(name, op) # :nodoc:
  return Gem::Dependency.new name, op unless peek[0] == :text

  version = get(:text).value

  requirements = ["#{op} #{version}"]

  while peek.type == :comma do
    get :comma
    op      = get(:requirement).value
    version = get(:text).value

    requirements << "#{op} #{version}"
  end

  Gem::Dependency.new name, requirements
end

#parse_GEM ⇒ Object

:nodoc:



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
 
# File 'lib/rubygems/request_set/lockfile/parser.rb', line 110

def parse_GEM # :nodoc:
  sources = []

  while [:entry, 'remote'] == peek.first(2) do
    get :entry, 'remote'
    data = get(:text).value
    skip :newline

    sources << Gem::Source.new(data)
  end

  sources << Gem::Source.new(Gem::DEFAULT_HOST) if sources.empty?

  get :entry, 'specs'

  skip :newline

  set = Gem::Resolver::LockSet.new sources
  last_specs = nil

  while not @tokens.empty? and :text == peek.type do
    token = get :text
    name = token.value
    column = token.column

    case peek[0]
    when :newline then
      last_specs.each do |spec|
        spec.add_dependency Gem::Dependency.new name if column == 6
      end
    when :l_paren then
      get :l_paren

      token = get [:text, :requirement]
      type = token.type
      data = token.value

      if type == :text and column == 4
        version, platform = data.split '-', 2

        platform =
          platform ? Gem::Platform.new(platform) : Gem::Platform::RUBY

        last_specs = set.add name, version, platform
      else
        dependency = parse_dependency name, data

        last_specs.each do |spec|
          spec.add_dependency dependency
        end
      end

      get :r_paren
    else
      raise "BUG: unknown token #{peek}"
    end

    skip :newline
  end

  @set.sets << set
end

#parse_GIT ⇒ Object

:nodoc:



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
 
# File 'lib/rubygems/request_set/lockfile/parser.rb', line 173

def parse_GIT # :nodoc:
  get :entry, 'remote'
  repository = get(:text).value

  skip :newline

  get :entry, 'revision'
  revision = get(:text).value

  skip :newline

  type = peek.type
  value = peek.value
  if type == :entry and %w[branch ref tag].include? value
    get
    get :text

    skip :newline
  end

  get :entry, 'specs'

  skip :newline

  set = Gem::Resolver::GitSet.new
  set.root_dir = @set.install_dir

  last_spec = nil

  while not @tokens.empty? and :text == peek.type do
    token = get :text
    name = token.value
    column = token.column

    case peek[0]
    when :newline then
      last_spec.add_dependency Gem::Dependency.new name if column == 6
    when :l_paren then
      get :l_paren

      token = get [:text, :requirement]
      type = token.type
      data = token.value

      if type == :text and column == 4
        last_spec = set.add_git_spec name, data, repository, revision, true
      else
        dependency = parse_dependency name, data

        last_spec.add_dependency dependency
      end

      get :r_paren
    else
      raise "BUG: unknown token #{peek}"
    end

    skip :newline
  end

  @set.sets << set
end

#parse_PATH ⇒ Object

:nodoc:



236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
 
# File 'lib/rubygems/request_set/lockfile/parser.rb', line 236

def parse_PATH # :nodoc:
  get :entry, 'remote'
  directory = get(:text).value

  skip :newline

  get :entry, 'specs'

  skip :newline

  set = Gem::Resolver::VendorSet.new
  last_spec = nil

  while not @tokens.empty? and :text == peek.first do
    token = get :text
    name = token.value
    column = token.column

    case peek[0]
    when :newline then
      last_spec.add_dependency Gem::Dependency.new name if column == 6
    when :l_paren then
      get :l_paren

      token = get [:text, :requirement]
      type = token.type
      data = token.value

      if type == :text and column == 4
        last_spec = set.add_vendor_gem name, directory
      else
        dependency = parse_dependency name, data

        last_spec.dependencies << dependency
      end

      get :r_paren
    else
      raise "BUG: unknown token #{peek}"
    end

    skip :newline
  end

  @set.sets << set
end

#parse_PLATFORMS ⇒ Object

:nodoc:



283
284
285
286
287
288
289
290
291
 
# File 'lib/rubygems/request_set/lockfile/parser.rb', line 283

def parse_PLATFORMS # :nodoc:
  while not @tokens.empty? and :text == peek.first do
    name = get(:text).value

    @platforms << name

    skip :newline
  end
end