# File lib/bundler/compact_index_client/cache.rb, line 8
def initialize(directory)
  @directory = Pathname.new(directory).expand_path
  info_roots.each do |dir|
    SharedHelpers.filesystem_access(dir) do
      FileUtils.mkdir_p(dir)
    end
  end
end

# File lib/bundler/compact_index_client/cache.rb, line 50
def checksums
  checksums = {}

  lines(versions_path).each do |line|
    name, _, checksum = line.split(" ", 3)
    checksums[name] = checksum
  end

  checksums
end

# File lib/bundler/compact_index_client/cache.rb, line 61
def dependencies(name)
  lines(info_path(name)).map do |line|
    parse_gem(line)
  end
end

# File lib/bundler/compact_index_client/cache.rb, line 67
def info_path(name)
  name = name.to_s
  if name =~ /[^a-z0-9_-]/
    name += "-#{SharedHelpers.digest(:MD5).hexdigest(name).downcase}"
    info_roots.last.join(name)
  else
    info_roots.first.join(name)
  end
end

# File lib/bundler/compact_index_client/cache.rb, line 17
def names
  lines(names_path)
end

# File lib/bundler/compact_index_client/cache.rb, line 21
def names_path
  directory.join("names")
end

# File lib/bundler/compact_index_client/cache.rb, line 77
def specific_dependency(name, version, platform)
  pattern = [version, platform].compact.join("-")
  return nil if pattern.empty?

  gem_lines = info_path(name).read
  gem_line = gem_lines[/^#{Regexp.escape(pattern)}\b.*/, 0]
  gem_line ? parse_gem(gem_line) : nil
end

# File lib/bundler/compact_index_client/cache.rb, line 25
def versions
  versions_by_name = Hash.new {|hash, key| hash[key] = [] }
  info_checksums_by_name = {}

  lines(versions_path).each do |line|
    name, versions_string, info_checksum = line.split(" ", 3)
    info_checksums_by_name[name] = info_checksum || ""
    versions_string.split(",").each do |version|
      if version.start_with?("-")
        version = version[1..-1].split("-", 2).unshift(name)
        versions_by_name[name].delete(version)
      else
        version = version.split("-", 2).unshift(name)
        versions_by_name[name] << version
      end
    end
  end

  [versions_by_name, info_checksums_by_name]
end

# File lib/bundler/compact_index_client/cache.rb, line 46
def versions_path
  directory.join("versions")
end

# File lib/bundler/compact_index_client/cache.rb, line 110
def info_roots
  [
    directory.join("info"),
    directory.join("info-special-characters"),
  ]
end

# File lib/bundler/compact_index_client/cache.rb, line 88
def lines(path)
  return [] unless path.file?
  lines = SharedHelpers.filesystem_access(path, :read, &:read).split("\n")
  header = lines.index("---")
  header ? lines[header + 1..-1] : lines
end

# File lib/bundler/compact_index_client/cache.rb, line 104
def parse_dependency(string)
  dependency = string.split(":")
  dependency[-1] = dependency[-1].split("&") if dependency.size > 1
  dependency
end

# File lib/bundler/compact_index_client/cache.rb, line 95
def parse_gem(string)
  version_and_platform, rest = string.split(" ", 2)
  version, platform = version_and_platform.split("-", 2)
  dependencies, requirements = rest.split("|", 2).map {|s| s.split(",") } if rest
  dependencies = dependencies ? dependencies.map {|d| parse_dependency(d) } : []
  requirements = requirements ? requirements.map {|r| parse_dependency(r) } : []
  [version, platform, dependencies, requirements]
end