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
|
require 'dependable'
require 'dependency'
require 'dependencies'
require 'build_environment'
# A base class for non-formula requirements needed by formulae.
# A "fatal" requirement is one that will fail the build if it is not present.
# By default, Requirements are non-fatal.
class Requirement
include Dependable
attr_reader :tags, :name, :cask, :download
alias_method :option_name, :name
def initialize(tags=[])
@cask ||= self.class.cask
@download ||= self.class.download
tags.each do |tag|
next unless tag.is_a? Hash
@cask ||= tag[:cask]
@download ||= tag[:download]
end
@tags = tags
@tags << :build if self.class.build
@name ||= infer_name
end
# The message to show when the requirement is not met.
def message
s = ""
if cask
s += <<-EOS.undent
You can install with Homebrew Cask:
brew install Caskroom/cask/#{cask}
EOS
end
if download
s += <<-EOS.undent
You can download from:
#{download}
EOS
end
s
end
# Overriding #satisfied? is deprecated.
# Pass a block or boolean to the satisfy DSL method instead.
def satisfied?
result = self.class.satisfy.yielder { |p| instance_eval(&p) }
@satisfied_result = result
!!result
end
# Can overridden to optionally prevent a formula with this requirement from
# pouring a bottle.
def pour_bottle?; true end
# Overriding #fatal? is deprecated.
# Pass a boolean to the fatal DSL method instead.
def fatal?
self.class.fatal || false
end
def default_formula?
self.class.default_formula || false
end
# Overriding #modify_build_environment is deprecated.
# Pass a block to the the env DSL method instead.
# Note: #satisfied? should be called before invoking this method
# as the env modifications may depend on its side effects.
def modify_build_environment
instance_eval(&env_proc) if env_proc
# XXX If the satisfy block returns a Pathname, then make sure that it
# remains available on the PATH. This makes requirements like
# satisfy { which("executable") }
# work, even under superenv where "executable" wouldn't normally be on the
# PATH.
# This is undocumented magic and it should be removed, but we need to add
# a way to declare path-based requirements that work with superenv first.
if Pathname === @satisfied_result
parent = @satisfied_result.parent
unless ENV["PATH"].split(File::PATH_SEPARATOR).include?(parent.to_s)
ENV.append_path("PATH", parent)
end
end
end
def env
self.class.env
end
def env_proc
self.class.env_proc
end
def ==(other)
instance_of?(other.class) && name == other.name && tags == other.tags
end
alias_method :eql?, :==
def hash
name.hash ^ tags.hash
end
def inspect
"#<#{self.class.name}: #{name.inspect} #{tags.inspect}>"
end
def to_dependency
f = self.class.default_formula
raise "No default formula defined for #{inspect}" if f.nil?
Dependency.new(f, tags, method(:modify_build_environment), name)
end
private
def infer_name
klass = self.class.name || self.class.to_s
klass.sub!(/(Dependency|Requirement)$/, '')
klass.sub!(/^(\w+::)*/, '')
klass.downcase
end
def which(cmd)
super(cmd, ORIGINAL_PATHS.join(File::PATH_SEPARATOR))
end
class << self
include BuildEnvironmentDSL
attr_reader :env_proc
attr_rw :fatal, :default_formula
attr_rw :cask, :download
# build is deprecated, use `depends_on <requirement> => :build` instead
attr_rw :build
def satisfy(options={}, &block)
@satisfied ||= Requirement::Satisfier.new(options, &block)
end
def env(*settings, &block)
if block_given?
@env_proc = block
else
super
end
end
end
class Satisfier
def initialize(options, &block)
case options
when Hash
@options = { :build_env => true }
@options.merge!(options)
else
@satisfied = options
end
@proc = block
end
def yielder
if instance_variable_defined?(:@satisfied)
@satisfied
elsif @options[:build_env]
require "extend/ENV"
ENV.with_build_environment { yield @proc }
else
yield @proc
end
end
end
class << self
# Expand the requirements of dependent recursively, optionally yielding
# [dependent, req] pairs to allow callers to apply arbitrary filters to
# the list.
# The default filter, which is applied when a block is not given, omits
# optionals and recommendeds based on what the dependent has asked for.
def expand(dependent, &block)
reqs = Requirements.new
formulae = dependent.recursive_dependencies.map(&:to_formula)
formulae.unshift(dependent)
formulae.each do |f|
f.requirements.each do |req|
if prune?(f, req, &block)
next
else
reqs << req
end
end
end
reqs
end
def prune?(dependent, req, &block)
catch(:prune) do
if block_given?
yield dependent, req
elsif req.optional? || req.recommended?
prune unless dependent.build.with?(req)
end
end
end
# Used to prune requirements when calling expand with a block.
def prune
throw(:prune, true)
end
end
end
|
