/
record.rb
123 lines (104 loc) · 3.27 KB
/
record.rb
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# frozen_string_literal: true
require 'thread'
require 'listen/record/entry'
require 'listen/record/symlink_detector'
module Listen
class Record
# TODO: one Record object per watched directory?
# TODO: deprecate
attr_reader :root
def initialize(directory, silencer)
reset_tree
@root = directory.to_s
@silencer = silencer
end
def add_dir(rel_path)
if !empty_dirname?(rel_path.to_s)
@tree[rel_path.to_s]
end
end
def update_file(rel_path, data)
dirname, basename = Pathname(rel_path).split.map(&:to_s)
_fast_update_file(dirname, basename, data)
end
def unset_path(rel_path)
dirname, basename = Pathname(rel_path).split.map(&:to_s)
_fast_unset_path(dirname, basename)
end
def file_data(rel_path)
dirname, basename = Pathname(rel_path).split.map(&:to_s)
if empty_dirname?(dirname)
@tree[basename].dup
else
@tree[dirname][basename] ||= {}
@tree[dirname][basename].dup
end
end
def dir_entries(rel_path)
rel_path_s = rel_path.to_s
subtree = if empty_dirname?(rel_path_s)
@tree
else
@tree[rel_path_s]
end
subtree.each_with_object({}) do |(key, values), result|
# only return data for file entries inside the dir (which will each be sub-hashes)
if values.is_a?(Hash)
result[key] = values.has_key?(:mtime) ? values : {}
end
end
end
def build
reset_tree
# TODO: test with a file name given
# TODO: test other permissions
# TODO: test with mixed encoding
symlink_detector = SymlinkDetector.new
remaining = ::Queue.new
remaining << Entry.new(root, nil, nil)
_fast_build_dir(remaining, symlink_detector) until remaining.empty?
end
private
def empty_dirname?(dirname)
dirname == '.' || dirname == ''
end
def reset_tree
@tree = Hash.new { |h, k| h[k] = {} }
end
def _fast_update_file(dirname, basename, data)
if empty_dirname?(dirname.to_s)
@tree[basename] = @tree[basename].merge(data)
else
@tree[dirname][basename] = (@tree[dirname][basename] || {}).merge(data)
end
end
def _fast_unset_path(dirname, basename)
# this may need to be reworked to properly remove
# entries from a tree, without adding non-existing dirs to the record
if empty_dirname?(dirname.to_s)
if @tree.key?(basename)
@tree.delete(basename)
end
elsif @tree.key?(dirname)
@tree[dirname].delete(basename)
end
end
def _fast_build_dir(remaining, symlink_detector)
entry = remaining.pop
return if @silencer.silenced?(entry.record_dir_key, :dir)
children = entry.children # NOTE: children() implicitly tests if dir
symlink_detector.verify_unwatched!(entry)
children.each { |child| remaining << child }
add_dir(entry.record_dir_key)
rescue Errno::ENOTDIR
_fast_try_file(entry)
rescue SystemCallError, SymlinkDetector::Error
_fast_unset_path(entry.relative, entry.name)
end
def _fast_try_file(entry)
_fast_update_file(entry.relative, entry.name, entry.meta)
rescue SystemCallError
_fast_unset_path(entry.relative, entry.name)
end
end
end