44 lines
1.3 KiB
Ruby
44 lines
1.3 KiB
Ruby
require "requirement"
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class LanguageModuleRequirement < Requirement
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fatal true
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def initialize(language, module_name, import_name = nil)
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@language = language
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@module_name = module_name
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@import_name = import_name || module_name
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super([language, module_name, import_name])
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end
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satisfy(:build_env => false) { quiet_system(*the_test) }
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def message; <<-EOS.undent
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Unsatisfied dependency: #{@module_name}
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Homebrew does not provide #{@language.to_s.capitalize} dependencies; install with:
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#{command_line} #{@module_name}
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EOS
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end
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def the_test
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case @language
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when :lua then %W[/usr/bin/env luarocks-5.2 show #{@import_name}]
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when :lua51 then %W[/usr/bin/env luarocks-5.1 show #{@import_name}]
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when :perl then %W[/usr/bin/env perl -e use\ #{@import_name}]
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when :python then %W[/usr/bin/env python -c import\ #{@import_name}]
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when :python3 then %W[/usr/bin/env python3 -c import\ #{@import_name}]
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when :ruby then %W[/usr/bin/env ruby -rubygems -e require\ '#{@import_name}']
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end
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end
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def command_line
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case @language
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when :lua then "luarocks-5.2 install"
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when :lua51 then "luarocks-5.1 install"
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when :perl then "cpan -i"
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when :python then "pip install"
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when :python3 then "pip3 install"
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when :ruby then "gem install"
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end
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end
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end
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