Current File : //opt/alt/ruby21/lib64/ruby/2.1.0/rubygems/request_set/lockfile.rb
require 'strscan'
##
# 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
##
# The platforms for this Lockfile
attr_reader :platforms
##
# Creates a new Lockfile for the given +request_set+ and +gem_deps_file+
# location.
def initialize request_set, gem_deps_file
@set = request_set
@gem_deps_file = File.expand_path(gem_deps_file)
@gem_deps_dir = File.dirname(@gem_deps_file)
@current_token = nil
@line = 0
@line_pos = 0
@platforms = []
@tokens = []
end
def add_DEPENDENCIES out # :nodoc:
out << "DEPENDENCIES"
@requests.sort_by { |r| r.name }.each do |request|
spec = request.spec
if [Gem::Resolver::VendorSpecification,
Gem::Resolver::GitSpecification].include? spec.class then
out << " #{request.name}!"
else
requirement = request.request.dependency.requirement
out << " #{request.name}#{requirement.for_lockfile}"
end
end
out << nil
end
def add_GEM out # :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|
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|
requirement = dependency.requirement
out << " #{dependency.name}#{requirement.for_lockfile}"
end
end
out << nil
end
end
def add_GIT out
return unless git_requests =
@spec_groups.delete(Gem::Resolver::GitSpecification)
by_repository_revision = git_requests.group_by do |request|
source = request.spec.source
[source.repository, source.rev_parse]
end
out << "GIT"
by_repository_revision.each do |(repository, revision), requests|
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
end
out << nil
end
def relative_path_from dest, base # :nodoc:
dest = File.expand_path(dest)
base = File.expand_path(base)
if dest.index(base) == 0
return dest[base.size+1..-1]
else
dest
end
end
def add_PATH out # :nodoc:
return unless path_requests =
@spec_groups.delete(Gem::Resolver::VendorSpecification)
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.delete Gem::Platform::RUBY if platforms.length > 1
platforms.each do |platform|
out << " #{platform}"
end
out << nil
end
##
# Gets the next token for a Lockfile
def get expected_types = nil, expected_value = nil # :nodoc:
@current_token = @tokens.shift
type, value, column, line = @current_token
if expected_types and not Array(expected_types).include? type then
unget
message = "unexpected token [#{type.inspect}, #{value.inspect}], " +
"expected #{expected_types.inspect}"
raise ParseError.new message, column, line, "#{@gem_deps_file}.lock"
end
if expected_value and expected_value != value then
unget
message = "unexpected token [#{type.inspect}, #{value.inspect}], " +
"expected [#{expected_types.inspect}, " +
"#{expected_value.inspect}]"
raise ParseError.new message, column, line, "#{@gem_deps_file}.lock"
end
@current_token
end
def parse # :nodoc:
tokenize
until @tokens.empty? do
type, data, column, line = get
case type
when :section then
skip :newline
case data
when 'DEPENDENCIES' then
parse_DEPENDENCIES
when 'GIT' then
parse_GIT
when 'GEM' then
parse_GEM
when 'PATH' then
parse_PATH
when 'PLATFORMS' then
parse_PLATFORMS
else
type, = get until @tokens.empty? or peek.first == :section
end
else
raise "BUG: unhandled token #{type} (#{data.inspect}) at line #{line} column #{column}"
end
end
end
def parse_DEPENDENCIES # :nodoc:
while not @tokens.empty? and :text == peek.first do
_, name, = get :text
requirements = []
case peek[0]
when :bang then
get :bang
spec = @set.sets.select { |set|
Gem::Resolver::GitSet === set or
Gem::Resolver::VendorSet === set
}.map { |set|
set.specs[name]
}.first
requirements << spec.version
when :l_paren then
get :l_paren
loop do
_, op, = get :requirement
_, version, = get :text
requirements << "#{op} #{version}"
break unless peek[0] == :comma
get :comma
end
get :r_paren
end
@set.gem name, *requirements
skip :newline
end
end
def parse_GEM # :nodoc:
get :entry, 'remote'
_, data, = get :text
source = Gem::Source.new data
skip :newline
get :entry, 'specs'
skip :newline
set = Gem::Resolver::LockSet.new source
last_spec = nil
while not @tokens.empty? and :text == peek.first do
_, name, column, = get :text
case peek[0]
when :newline then
last_spec.add_dependency Gem::Dependency.new name if column == 6
when :l_paren then
get :l_paren
type, data, = get [:text, :requirement]
if type == :text and column == 4 then
version, platform = data.split '-', 2
platform =
platform ? Gem::Platform.new(platform) : Gem::Platform::RUBY
last_spec = set.add name, version, platform
else
dependency = parse_dependency name, data
last_spec.add_dependency dependency
end
get :r_paren
else
raise "BUG: unknown token #{peek}"
end
skip :newline
end
@set.sets << set
end
def parse_GIT # :nodoc:
get :entry, 'remote'
_, repository, = get :text
skip :newline
get :entry, 'revision'
_, revision, = get :text
skip :newline
get :entry, 'specs'
skip :newline
set = Gem::Resolver::GitSet.new
last_spec = nil
while not @tokens.empty? and :text == peek.first do
_, name, column, = get :text
case peek[0]
when :newline then
last_spec.add_dependency Gem::Dependency.new name if column == 6
when :l_paren then
get :l_paren
type, data, = get [:text, :requirement]
if type == :text and column == 4 then
last_spec = set.add_git_spec name, data, repository, revision, true
else
dependency = parse_dependency name, data
last_spec.spec.dependencies << dependency
end
get :r_paren
else
raise "BUG: unknown token #{peek}"
end
skip :newline
end
@set.sets << set
end
def parse_PATH # :nodoc:
get :entry, 'remote'
_, directory, = get :text
skip :newline
get :entry, 'specs'
skip :newline
set = Gem::Resolver::VendorSet.new
last_spec = nil
while not @tokens.empty? and :text == peek.first do
_, name, column, = get :text
case peek[0]
when :newline then
last_spec.add_dependency Gem::Dependency.new name if column == 6
when :l_paren then
get :l_paren
type, data, = get [:text, :requirement]
if type == :text and column == 4 then
last_spec = set.add_vendor_gem name, directory
else
dependency = parse_dependency name, data
last_spec.spec.dependencies << dependency
end
get :r_paren
else
raise "BUG: unknown token #{peek}"
end
skip :newline
end
@set.sets << set
end
def parse_PLATFORMS # :nodoc:
while not @tokens.empty? and :text == peek.first do
_, name, = get :text
@platforms << name
skip :newline
end
end
##
# Parses the requirements following the dependency +name+ and the +op+ for
# the first token of the requirements and returns a Gem::Dependency object.
def parse_dependency name, op # :nodoc:
return Gem::Dependency.new name unless peek[0] == :text
_, version, = get :text
requirements = ["#{op} #{version}"]
while peek[0] == :comma do
get :comma
_, op, = get :requirement
_, version, = get :text
requirements << "#{op} #{version}"
end
Gem::Dependency.new name, requirements
end
##
# Peeks at the next token for Lockfile
def peek # :nodoc:
@tokens.first || [:EOF]
end
def skip type # :nodoc:
get while not @tokens.empty? and peek.first == type
end
##
# The contents of the lock file.
def to_s
@set.resolve
out = []
@requests = @set.sorted_requests
@spec_groups = @requests.group_by do |request|
request.spec.class
end
add_PATH out
add_GIT out
add_GEM out
add_PLATFORMS out
add_DEPENDENCIES out
out.join "\n"
end
##
# Calculates the column (by byte) and the line of the current token based on
# +byte_offset+.
def token_pos byte_offset # :nodoc:
[byte_offset - @line_pos, @line]
end
##
# Converts a lock file into an Array of tokens. If the lock file is missing
# an empty Array is returned.
def tokenize # :nodoc:
@line = 0
@line_pos = 0
@platforms = []
@tokens = []
@current_token = nil
lock_file = "#{@gem_deps_file}.lock"
@input = File.read lock_file
s = StringScanner.new @input
until s.eos? do
pos = s.pos
pos = s.pos if leading_whitespace = s.scan(/ +/)
if s.scan(/[<|=>]{7}/) then
message = "your #{lock_file} contains merge conflict markers"
column, line = token_pos pos
raise ParseError.new message, column, line, lock_file
end
@tokens <<
case
when s.scan(/\r?\n/) then
token = [:newline, nil, *token_pos(pos)]
@line_pos = s.pos
@line += 1
token
when s.scan(/[A-Z]+/) then
if leading_whitespace then
text = s.matched
text += s.scan(/[^\s)]*/).to_s # in case of no match
[:text, text, *token_pos(pos)]
else
[:section, s.matched, *token_pos(pos)]
end
when s.scan(/([a-z]+):\s/) then
s.pos -= 1 # rewind for possible newline
[:entry, s[1], *token_pos(pos)]
when s.scan(/\(/) then
[:l_paren, nil, *token_pos(pos)]
when s.scan(/\)/) then
[:r_paren, nil, *token_pos(pos)]
when s.scan(/<=|>=|=|~>|<|>|!=/) then
[:requirement, s.matched, *token_pos(pos)]
when s.scan(/,/) then
[:comma, nil, *token_pos(pos)]
when s.scan(/!/) then
[:bang, nil, *token_pos(pos)]
when s.scan(/[^\s),!]*/) then
[:text, s.matched, *token_pos(pos)]
else
raise "BUG: can't create token for: #{s.string[s.pos..-1].inspect}"
end
end
@tokens
rescue Errno::ENOENT
@tokens
end
##
# Ungets the last token retrieved by #get
def unget # :nodoc:
@tokens.unshift @current_token
end
##
# Writes the lock file alongside the gem dependencies file
def write
open "#{@gem_deps_file}.lock", 'w' do |io|
io.write to_s
end
end
end
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