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lockfile.rb

# frozen_string_literal: true
##
# Parses a gem.deps.rb.lock file and constructs a LockSet containing the
# dependencies found inside.  If the lock file is missing no LockSet is
# constructed.

class Gem::RequestSet::Lockfile
  ##
  # Raised when a lockfile cannot be parsed

class ParseError < Gem::Exception

##
    # The column where the error was encountered

attr_reader :column

##
    # The line where the error was encountered

attr_reader :line

##
    # The location of the lock file

attr_reader :path

##
    # Raises a ParseError with the given +message+ which was encountered at a
    # +line+ and +column+ while parsing.

def initialize message, column, line, path
      @line   = line
      @column = column
      @path   = path
      super "#{message} (at line #{line} column #{column})"
    end
  end

##
  # Creates a new Lockfile for the given +request_set+ and +gem_deps_file+
  # location.

def self.build request_set, gem_deps_file, dependencies = nil
    request_set.resolve
    dependencies ||= requests_to_deps request_set.sorted_requests
    new request_set, gem_deps_file, dependencies
  end

def self.requests_to_deps requests # :nodoc:
    deps = {}

requests.each do |request|
      spec        = request.spec
      name        = request.name
      requirement = request.request.dependency.requirement

deps[name] = if [Gem::Resolver::VendorSpecification,
                       Gem::Resolver::GitSpecification].include? spec.class then
                     Gem::Requirement.source_set
                   else
                     requirement
                   end
    end

deps
  end

##
  # The platforms for this Lockfile

attr_reader :platforms

def initialize request_set, gem_deps_file, dependencies
    @set           = request_set
    @dependencies  = dependencies
    @gem_deps_file = File.expand_path(gem_deps_file)
    @gem_deps_dir  = File.dirname(@gem_deps_file)

@gem_deps_file.untaint unless gem_deps_file.tainted?

@platforms      = []
  end

def add_DEPENDENCIES out # :nodoc:
    out << "DEPENDENCIES"

out.concat @dependencies.sort_by { |name,| name }.map { |name, requirement|
      "  #{name}#{requirement.for_lockfile}"
    }

out << nil
  end

def add_GEM out, spec_groups # :nodoc:
    return if spec_groups.empty?

source_groups = spec_groups.values.flatten.group_by do |request|
      request.spec.source.uri
    end

source_groups.sort_by { |group,| group.to_s }.map do |group, requests|
      out << "GEM"
      out << "  remote: #{group}"
      out << "  specs:"

requests.sort_by { |request| request.name }.each do |request|
        next if request.spec.name == 'bundler'
        platform = "-#{request.spec.platform}" unless
          Gem::Platform::RUBY == request.spec.platform

out << "    #{request.name} (#{request.version}#{platform})"

request.full_spec.dependencies.sort.each do |dependency|
          next if dependency.type == :development

requirement = dependency.requirement
          out << "      #{dependency.name}#{requirement.for_lockfile}"
        end
      end
      out << nil
    end
  end

def add_GIT out, git_requests
    return if git_requests.empty?

by_repository_revision = git_requests.group_by do |request|
      source = request.spec.source
      [source.repository, source.rev_parse]
    end

by_repository_revision.each do |(repository, revision), requests|
      out << "GIT"
      out << "  remote: #{repository}"
      out << "  revision: #{revision}"
      out << "  specs:"

requests.sort_by { |request| request.name }.each do |request|
        out << "    #{request.name} (#{request.version})"

dependencies = request.spec.dependencies.sort_by { |dep| dep.name }
        dependencies.each do |dep|
          out << "      #{dep.name}#{dep.requirement.for_lockfile}"
        end
      end
      out << nil
    end
  end

def relative_path_from dest, base # :nodoc:
    dest = File.expand_path(dest)
    base = File.expand_path(base)

if dest.index(base) == 0 then
      offset = dest[base.size+1..-1]

return '.' unless offset

offset
    else
      dest
    end
  end

def add_PATH out, path_requests # :nodoc:
    return if path_requests.empty?

out << "PATH"
    path_requests.each do |request|
      directory = File.expand_path(request.spec.source.uri)

out << "  remote: #{relative_path_from directory, @gem_deps_dir}"
      out << "  specs:"
      out << "    #{request.name} (#{request.version})"
    end

out << nil
  end

def add_PLATFORMS out # :nodoc:
    out << "PLATFORMS"

platforms = requests.map { |request| request.spec.platform }.uniq

platforms = platforms.sort_by { |platform| platform.to_s }

platforms.each do |platform|
      out << "  #{platform}"
    end

out << nil
  end

def spec_groups
    requests.group_by { |request| request.spec.class }
  end

##
  # The contents of the lock file.

def to_s
    out = []

groups = spec_groups

add_PATH out, groups.delete(Gem::Resolver::VendorSpecification) { [] }

add_GIT out, groups.delete(Gem::Resolver::GitSpecification) { [] }

add_GEM out, groups

add_PLATFORMS out

add_DEPENDENCIES out

out.join "\n"
  end

##
  # Writes the lock file alongside the gem dependencies file

def write
    content = to_s

File.open "#{@gem_deps_file}.lock", 'w' do |io|
      io.write content
    end
  end

private

def requests
    @set.sorted_requests
  end
end

require 'rubygems/request_set/lockfile/tokenizer'

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