Class: EY::Serverside::LockfileParser

Inherits:
Object
  • Object
show all
Defined in:
lib/engineyard-serverside/lockfile_parser.rb

Constant Summary collapse

DEFAULT = 
"1.0.21"

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(lockfile_contents) ⇒ LockfileParser

Returns a new instance of LockfileParser.



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# File 'lib/engineyard-serverside/lockfile_parser.rb', line 13

def initialize(lockfile_contents)
  @contents = lockfile_contents
  parse
end

Instance Attribute Details

#bundler_version ⇒ Object (readonly)

Returns the value of attribute bundler_version.



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# File 'lib/engineyard-serverside/lockfile_parser.rb', line 11

def bundler_version
  @bundler_version
end

#lockfile_version ⇒ Object (readonly)

Returns the value of attribute lockfile_version.



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# File 'lib/engineyard-serverside/lockfile_parser.rb', line 11

def lockfile_version
  @lockfile_version
end

Class Method Details

.default_version ⇒ Object 



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# File 'lib/engineyard-serverside/lockfile_parser.rb', line 7

def self.default_version
  DEFAULT
end

Instance Method Details

#any_database_adapter? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/engineyard-serverside/lockfile_parser.rb', line 22

def any_database_adapter?
  any_ruby_adapter = %w[mysql2 mysql do_mysql pg do_postgres].any? do |type|
    @contents.index(/^\s+#{type}\s\([^\)]+\)$/)
  end

  any_jruby_adapter = %w[mysql postgresql postgres].any? do |type|
    @contents.index(/^\s+jdbc-#{type}\s\([^\)]+\)$/) || @contents.index(/^\s+activerecord-jdbc#{type}-adapter\s\([^\)]+\)$/)
  end

  any_ruby_adapter || any_jruby_adapter
end

#fetch_version(bundler_version, version_qualifier) ⇒ Object 



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# File 'lib/engineyard-serverside/lockfile_parser.rb', line 79

def fetch_version(bundler_version, version_qualifier)
  return bundler_version || DEFAULT unless version_qualifier

  case version_qualifier
  when '='
    bundler_version
  when '>='
    Gem::Version.new(bundler_version) > Gem::Version.new(DEFAULT) ? bundler_version : DEFAULT
  when '~>'
    bundler_gem_version = Gem::Version.new(bundler_version)
    recommendation = bundler_gem_version.spermy_recommendation.gsub(/~>\s*(.+)$/, '\1.')
    recommends_default = DEFAULT.index(recommendation) == 0
    default_newer_than_requested = Gem::Version.new(DEFAULT) > bundler_gem_version
    (recommends_default && default_newer_than_requested) ? DEFAULT : bundler_version
  end
end

#has_ey_config? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/engineyard-serverside/lockfile_parser.rb', line 18

def has_ey_config?
  @contents.index(/^\s+ey_config\s\([^\)]+\)$/)
end

#parse ⇒ Object 



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# File 'lib/engineyard-serverside/lockfile_parser.rb', line 38

def parse
  parse_from_metadata ||
    parse_from_dependencies ||
    raise("Malformed or pre bundler-1.0.0 Gemfile.lock: #{@contents[0,50]}...")
end

#parse_from_dependencies ⇒ Object 



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# File 'lib/engineyard-serverside/lockfile_parser.rb', line 65

def parse_from_dependencies
  section = slice_section('DEPENDENCIES')

  if section.empty?
    return nil
  end

  result = scan_bundler(section)
  bundler_version = result ? result.last : nil
  version_qualifier = result ? result.first : nil
  @lockfile_version = :bundler10
  @bundler_version = fetch_version(bundler_version, version_qualifier)
end

#parse_from_metadata ⇒ Object 



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# File 'lib/engineyard-serverside/lockfile_parser.rb', line 53

def parse_from_metadata
  section = slice_section('METADATA')

  if section.empty?
    return nil
  end

  result = section.scan(/^\s*version:\s*(.*)$/).first
  @lockfile_version = :bundler10
  @bundler_version = result ? result.first : DEFAULT
end

#scan_bundler(dep_section) ⇒ Object 



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# File 'lib/engineyard-serverside/lockfile_parser.rb', line 96

def scan_bundler(dep_section)
  dep_section.scan(/^\s*bundler\s*\((>?=|~>)\s*([^,\)]+)/).first
end

#slice_section(header) ⇒ Object 



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# File 'lib/engineyard-serverside/lockfile_parser.rb', line 44

def slice_section(header)
  if start = @contents.index(/^#{header}/)
    finish = @contents.index(/(^\S|\Z)/, start + header.length)
    @contents.slice(start..finish)
  else
    ""
  end
end

#uses_sqlite3? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/engineyard-serverside/lockfile_parser.rb', line 34

def uses_sqlite3?
  !any_database_adapter? && @contents.index(/^\s+sqlite3\s\([^\)]+\)$/)
end