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
|
## This file defines dependencies and requirements.
##
## A dependency is a formula that another formula needs to install.
## A requirement is something other than a formula that another formula
## needs to be present. This includes external language modules,
## command-line tools in the path, or any arbitrary predicate.
##
## The `depends_on` method in the formula DSL is used to declare
## dependencies and requirements.
# This class is used by `depends_on` in the formula DSL to turn dependency
# specifications into the proper kinds of dependencies and requirements.
class DependencyCollector
# Define the languages that we can handle as external dependencies.
LANGUAGE_MODULES = [
:chicken, :jruby, :lua, :node, :perl, :python, :rbx, :ruby
].freeze
attr_reader :deps, :external_deps
def initialize
@deps = Dependencies.new
@external_deps = []
end
def add spec
tag = nil
spec, tag = spec.shift if spec.is_a? Hash
dep = case spec
when :x11, :libpng
X11Dependency.new(tag)
when Symbol
raise "Unsupported special dependency #{spec}"
when String
if LANGUAGE_MODULES.include? tag
LanguageModuleDependency.new(tag, spec)
else
Dependency.new(spec, tag)
end
when Formula
Dependency.new(spec.name, tag)
when Dependency, Requirement
spec
else
raise "Unsupported type #{spec.class} for #{spec}"
end
(dep.is_a?(Requirement) ? @external_deps : @deps) << dep
end
end
# A list of formula dependencies.
class Dependencies < Array
def include? dependency_name
self.any?{|d| d.name == dependency_name}
end
end
# A dependency on another Homebrew formula.
class Dependency
attr_reader :name, :tags
def initialize name, tags=nil
@name = name
@tags = case tags
when Array then tags.each {|s| s.to_s}
when nil then []
else [tags.to_s]
end
end
def to_s
@name
end
def ==(other_dep)
@name == other_dep.to_s
end
def <=>(other_dep)
@name <=> other_dep.to_s
end
def options
@tags.select{|p|p.start_with? '--'}
end
end
# 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
def satisfied?; false; end
def fatal?; false; end
def message; ""; end
end
# A dependency on a language-specific module.
class LanguageModuleDependency < Requirement
def initialize language, module_name, import_name=nil
@language = language
@module_name = module_name
@import_name = import_name || module_name
end
def fatal?; true; end
def satisfied?
quiet_system(*the_test)
end
def message; <<-EOS.undent
Unsatisfied dependency: #{@module_name}
Homebrew does not provide #{@language.to_s.capitalize} dependencies; install with:
#{command_line} #{@module_name}
EOS
end
def the_test
case @language
when :chicken then %W{/usr/bin/env csi -e (use #{@import_name})}
when :jruby then %W{/usr/bin/env jruby -rubygems -e require\ '#{@import_name}'}
when :lua then %W{/usr/bin/env luarocks show #{@import_name}}
when :node then %W{/usr/bin/env node -e require('#{@import_name}');}
when :perl then %W{/usr/bin/env perl -e use\ #{@import_name}}
when :python then %W{/usr/bin/env python -c import\ #{@import_name}}
when :ruby then %W{/usr/bin/env ruby -rubygems -e require\ '#{@import_name}'}
when :rbx then %W{/usr/bin/env rbx -rubygems -e require\ '#{@import_name}'}
end
end
def command_line
case @language
when :chicken then "chicken-install"
when :jruby then "jruby -S gem install"
when :lua then "luarocks install"
when :node then "npm install"
when :perl then "cpan -i"
when :python then "easy_install"
when :rbx then "rbx gem install"
when :ruby then "gem install"
end
end
end
class X11Dependency < Requirement
def initialize min_version=nil
@min_version = min_version
end
def fatal?; true; end
def satisfied?
MacOS.x11_installed? and (@min_version == nil or @min_version <= MacOS.xquartz_version)
end
def message; <<-EOS.undent
Unsatisfied dependency: XQuartz #{@min_version}
Please install the latest version of XQuartz:
https://xquartz.macosforge.org
EOS
end
end
|
