Module: Prebake::Glibc

Defined in:
lib/prebake/glibc.rb

Constant Summary collapse

GNU_LIBC_PATTERN = 
/GLIBC\s+(\d+(?:\.\d+)+)|GNU libc[^\n]*\s(\d+(?:\.\d+)+)/

Class Method Summary collapse

Class Method Details

.compatible?(required) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/prebake/glibc.rb', line 9

def self.compatible?(required)
  return true unless linux?
  return true if required.nil?

  detected = detected_version
  return false if detected.nil?

  Gem::Version.new(detected) >= Gem::Version.new(required)
end

.detected_version ⇒ Object 



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# File 'lib/prebake/glibc.rb', line 19

def self.detected_version
  return @detected_version if defined?(@detected_version)

  output = run_ldd
  @detected_version = output ? parse_version(output) : nil
end

.linux? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/prebake/glibc.rb', line 31

def self.linux?
  RUBY_PLATFORM.include?("linux")
end

.parse_version(output) ⇒ Object 



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# File 'lib/prebake/glibc.rb', line 26

def self.parse_version(output)
  match = output.match(GNU_LIBC_PATTERN)
  match && (match[1] || match[2])
end

.reset! ⇒ Object 



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# File 'lib/prebake/glibc.rb', line 35

def self.reset!
  remove_instance_variable(:@detected_version) if defined?(@detected_version)
end

.run_ldd ⇒ Object 



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# File 'lib/prebake/glibc.rb', line 39

def self.run_ldd
  out, status = Open3.capture2e("ldd", "--version")
  return nil unless status.success?

  out
rescue Errno::ENOENT
  nil
end