# class Gem::Platform

Available list of platforms for targeting Gem installations.

See `gem help platform` for information on platform matching.

### Constants

CURRENT

  A platform-specific gem that is built for the packaging Ruby's platform. This will be replaced with `Gem::Platform::local`.

RUBY

  A pure-Ruby gem that may use `Gem::Specification#extensions` to build binary files.

### Attributes

cpu[RW]
os[RW]
version[RW]

### Public Class Methods

installable?(spec) click to toggle source

    # File lib/rubygems/platform.rb, line 43
    def self.installable?(spec)
      if spec.respond_to? :installable_platform?
        spec.installable_platform?
      else
        match_spec? spec
      end
    end

local() click to toggle source

    # File lib/rubygems/platform.rb, line 14
    def self.local
      arch = RbConfig::CONFIG['arch']
      arch = "#{arch}_60" if arch =~ /mswin(?:32|64)$/
      @local ||= new(arch)
    end

match(platform) click to toggle source

    # File lib/rubygems/platform.rb, line 20
    def self.match(platform)
      match_platforms?(platform, Gem.platforms)
    end

match_gem?(platform, gem_name) click to toggle source

    # File lib/rubygems/platform.rb, line 37
    def self.match_gem?(platform, gem_name)
      # Note: this method might be redefined by Ruby implementations to
      # customize behavior per RUBY_ENGINE, gem_name or other criteria.
      match_platforms?(platform, Gem.platforms)
    end

match_spec?(spec) click to toggle source

    # File lib/rubygems/platform.rb, line 33
    def self.match_spec?(spec)
      match_gem?(spec.platform, spec.name)
    end

new(arch) click to toggle source

    # File lib/rubygems/platform.rb, line 62
    def initialize(arch)
      case arch
      when Array then
        @cpu, @os, @version = arch
      when String then
        arch = arch.split '-'

        if arch.length > 2 and arch.last !~ /\d/ # reassemble x86-linux-gnu
          extra = arch.pop
          arch.last << "-#{extra}"
        end

        cpu = arch.shift

        @cpu = case cpu
               when /i\d86/ then 'x86'
               else cpu
               end

        if arch.length == 2 and arch.last =~ /^\d+(\.\d+)?$/ # for command-line
          @os, @version = arch
          return
        end

        os, = arch
        @cpu, os = nil, cpu if os.nil? # legacy jruby

        @os, @version = case os
                        when /aix(\d+)?/ then             [ 'aix',       $1  ]
                        when /cygwin/ then                [ 'cygwin',    nil ]
                        when /darwin(\d+)?/ then          [ 'darwin',    $1  ]
                        when /^macruby$/ then             [ 'macruby',   nil ]
                        when /freebsd(\d+)?/ then         [ 'freebsd',   $1  ]
                        when /hpux(\d+)?/ then            [ 'hpux',      $1  ]
                        when /^java$/, /^jruby$/ then     [ 'java',      nil ]
                        when /^java([\d.]*)/ then         [ 'java',      $1  ]
                        when /^dalvik(\d+)?$/ then        [ 'dalvik',    $1  ]
                        when /^dotnet$/ then              [ 'dotnet',    nil ]
                        when /^dotnet([\d.]*)/ then       [ 'dotnet',    $1  ]
                        when /linux-?((?!gnu)\w+)?/ then  [ 'linux',     $1  ]
                        when /mingw32/ then               [ 'mingw32',   nil ]
                        when /mingw-?(\w+)?/ then         [ 'mingw',     $1  ]
                        when /(mswin\d+)(\_(\d+))?/ then
                          os, version = $1, $3
                          @cpu = 'x86' if @cpu.nil? and os =~ /32$/
                          [os, version]
                        when /netbsdelf/ then             [ 'netbsdelf', nil ]
                        when /openbsd(\d+\.\d+)?/ then    [ 'openbsd',   $1  ]
                        when /bitrig(\d+\.\d+)?/ then     [ 'bitrig',    $1  ]
                        when /solaris(\d+\.\d+)?/ then    [ 'solaris',   $1  ]
                        # test
                        when /^(\w+_platform)(\d+)?/ then [ $1,          $2  ]
                        else                              [ 'unknown',   nil ]
                        end
      when Gem::Platform then
        @cpu = arch.cpu
        @os = arch.os
        @version = arch.version
      else
        raise ArgumentError, "invalid argument #{arch.inspect}"
      end
    end

### Private Class Methods

match_platforms?(platform, platforms) click to toggle source

    # File lib/rubygems/platform.rb, line 24
    def self.match_platforms?(platform, platforms)
      platforms.any? do |local_platform|
        platform.nil? or
          local_platform == platform or
          (local_platform != Gem::Platform::RUBY and local_platform =~ platform)
      end
    end

### Public Instance Methods

==(other) click to toggle source

Is `other` equal to this platform? Two platforms are equal if they have the same CPU, OS and version.

    # File lib/rubygems/platform.rb, line 137
    def ==(other)
      self.class === other and to_a == other.to_a
    end

Also aliased as: eql?
===(other) click to toggle source

Does `other` match this platform? Two platforms match if they have the same CPU, or either has a CPU of 'universal', they have the same OS, and they have the same version, or either has no version.

Additionally, the platform will match if the local CPU is 'arm' and the other CPU starts with “arm” (for generic ARM family support).

    # File lib/rubygems/platform.rb, line 155
    def ===(other)
      return nil unless Gem::Platform === other

      # cpu
      ([nil,'universal'].include?(@cpu) or [nil, 'universal'].include?(other.cpu) or @cpu == other.cpu or
      (@cpu == 'arm' and other.cpu.start_with?("arm"))) and

      # os
      @os == other.os and

      # version
      (@version.nil? or other.version.nil? or @version == other.version)
    end

=~(other) click to toggle source

Does `other` match this platform? If `other` is a `String` it will be converted to a `Gem::Platform` first. See `===` for matching rules.

    # File lib/rubygems/platform.rb, line 173
    def =~(other)
      case other
      when Gem::Platform then # nop
      when String then
        # This data is from http://gems.rubyforge.org/gems/yaml on 19 Aug 2007
        other = case other
                when /^i686-darwin(\d)/     then ['x86',       'darwin',  $1    ]
                when /^i\d86-linux/         then ['x86',       'linux',   nil   ]
                when 'java', 'jruby'        then [nil,         'java',    nil   ]
                when /^dalvik(\d+)?$/       then [nil,         'dalvik',  $1    ]
                when /dotnet(\-(\d+\.\d+))?/ then ['universal','dotnet',  $2    ]
                when /mswin32(\_(\d+))?/    then ['x86',       'mswin32', $2    ]
                when /mswin64(\_(\d+))?/    then ['x64',       'mswin64', $2    ]
                when 'powerpc-darwin'       then ['powerpc',   'darwin',  nil   ]
                when /powerpc-darwin(\d)/   then ['powerpc',   'darwin',  $1    ]
                when /sparc-solaris2.8/     then ['sparc',     'solaris', '2.8' ]
                when /universal-darwin(\d)/ then ['universal', 'darwin',  $1    ]
                else                             other
                end

        other = Gem::Platform.new other
      else
        return nil
      end

      self === other
    end

eql?(other)
Alias for: ==
to_a() click to toggle source

    # File lib/rubygems/platform.rb, line 125
    def to_a
      [@cpu, @os, @version]
    end

to_s() click to toggle source

    # File lib/rubygems/platform.rb, line 129
    def to_s
      to_a.compact.join '-'
    end