/
directory.rb
95 lines (79 loc) · 2.9 KB
/
directory.rb
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# frozen_string_literal: true
require 'set'
module Listen
# TODO: refactor (turn it into a normal object, cache the stat, etc)
class Directory
def self.scan(snapshot, rel_path, options)
record = snapshot.record
dir = Pathname.new(record.root)
previous = record.dir_entries(rel_path)
record.add_dir(rel_path)
# TODO: use children(with_directory: false)
path = dir + rel_path
current = Set.new(_children(path))
Listen::Logger.debug do
format('%s: %s(%s): %s -> %s',
(options[:silence] ? 'Recording' : 'Scanning'),
rel_path, options.inspect, previous.inspect, current.inspect)
end
begin
current.each do |full_path|
type = ::File.lstat(full_path.to_s).directory? ? :dir : :file
item_rel_path = full_path.relative_path_from(dir).to_s
_change(snapshot, type, item_rel_path, options)
end
rescue Errno::ENOENT
# The directory changed meanwhile, so rescan it
current = Set.new(_children(path))
retry
end
# TODO: this is not tested properly
previous = previous.reject { |entry, _| current.include? path + entry }
_async_changes(snapshot, Pathname.new(rel_path), previous, options)
rescue Errno::ENOENT, Errno::EHOSTDOWN
record.unset_path(rel_path)
_async_changes(snapshot, Pathname.new(rel_path), previous, options)
rescue Errno::ENOTDIR
# TODO: path not tested
record.unset_path(rel_path)
_async_changes(snapshot, path, previous, options)
_change(snapshot, :file, rel_path, options)
rescue
Listen::Logger.warn do
format('scan DIED: %s:%s', $ERROR_INFO, $ERROR_POSITION * "\n")
end
raise
end
def self.ascendant_of?(base, other)
other.ascend do |ascendant|
break true if base == ascendant
end
end
def self._async_changes(snapshot, path, previous, options)
fail "Not a Pathname: #{path.inspect}" unless path.respond_to?(:children)
previous.each do |entry, data|
# TODO: this is a hack with insufficient testing
type = data.key?(:mtime) ? :file : :dir
rel_path_s = (path + entry).to_s
_change(snapshot, type, rel_path_s, options)
end
end
def self._change(snapshot, type, path, options)
return snapshot.invalidate(type, path, options) if type == :dir
# Minor param cleanup for tests
# TODO: use a dedicated Event class
opts = options.dup
opts.delete(:recursive)
snapshot.invalidate(type, path, opts)
end
def self._children(path)
return path.children unless RUBY_ENGINE == 'jruby'
# JRuby inconsistency workaround, see:
# https://github.com/jruby/jruby/issues/3840
exists = path.exist?
directory = path.directory?
return path.children unless exists && !directory
raise Errno::ENOTDIR, path.to_s
end
end
end