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