137 lines
3.4 KiB
Ruby
137 lines
3.4 KiB
Ruby
require 'rbconfig'
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require 'digest/sha1'
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module Guard
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autoload :Darwin, 'guard/listeners/darwin'
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autoload :Linux, 'guard/listeners/linux'
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autoload :Windows, 'guard/listeners/windows'
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autoload :Polling, 'guard/listeners/polling'
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class Listener
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attr_reader :last_event, :sha1_checksums_hash, :directory, :callback
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def self.select_and_init(*a)
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if mac? && Darwin.usable?
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Darwin.new(*a)
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elsif linux? && Linux.usable?
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Linux.new(*a)
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elsif windows? && Windows.usable?
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Windows.new(*a)
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else
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UI.info "Using polling (Please help us to support your system better than that.)"
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Polling.new(*a)
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end
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end
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def initialize(directory=Dir.pwd, options={})
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@directory = directory.to_s
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@sha1_checksums_hash = {}
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@relativate_paths = options.fetch(:relativate_paths, true)
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update_last_event
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end
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def start
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watch directory
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end
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def stop
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end
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def on_change(&callback)
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@callback = callback
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end
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def update_last_event
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@last_event = Time.now
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end
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def modified_files(dirs, options = {})
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# <<<<<<< HEAD
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# files = potentially_modified_files(dirs, options).select { |path| File.file?(path) && file_modified?(path) }
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# files.map! { |file| file.gsub("#{Dir.pwd}/", '') }
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# =======
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files = potentially_modified_files(dirs, options).select { |path| File.file?(path) && file_modified?(path) }
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relativate_paths files
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end
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def worker
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raise NotImplementedError, "should respond to #watch"
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end
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# register a directory to watch. must be implemented by the subclasses
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def watch(directory)
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raise NotImplementedError, "do whatever you want here, given the directory as only argument"
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end
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def all_files
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potentially_modified_files [directory + '/'], :all => true
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# >>>>>>> b12769d2bf385b3c69973721144cae3d5d8fbed9
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end
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# scopes all given paths to the current #directory
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def relativate_paths(paths)
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return paths unless relativate_paths?
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paths.map do |path|
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path.gsub(%r~^#{directory}/~, '')
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end
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end
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attr_writer :relativate_paths
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def relativate_paths?
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!!@relativate_paths
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end
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private
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def potentially_modified_files(dirs, options = {})
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match = options[:all] ? "**/*" : "*"
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Dir.glob(dirs.map { |dir| "#{dir}#{match}" })
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end
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# Depending on the filesystem, mtime is probably only precise to the second, so round
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# both values down to the second for the comparison.
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def file_modified?(path)
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if File.mtime(path).to_i == last_event.to_i
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file_content_modified?(path, sha1_checksum(path))
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elsif File.mtime(path).to_i > last_event.to_i
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set_sha1_checksums_hash(path, sha1_checksum(path))
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true
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end
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rescue
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false
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end
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def file_content_modified?(path, sha1_checksum)
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if sha1_checksums_hash[path] != sha1_checksum
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set_sha1_checksums_hash(path, sha1_checksum)
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true
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else
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false
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end
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end
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def set_sha1_checksums_hash(path, sha1_checksum)
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@sha1_checksums_hash[path] = sha1_checksum
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end
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def sha1_checksum(path)
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Digest::SHA1.file(path).to_s
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end
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def self.mac?
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Config::CONFIG['target_os'] =~ /darwin/i
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end
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def self.linux?
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Config::CONFIG['target_os'] =~ /linux/i
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end
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def self.windows?
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Config::CONFIG['target_os'] =~ /mswin|mingw/i
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end
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end
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end
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