Module: EMDirWatcher

Defined in:
lib/em-dir-watcher.rb,
lib/em-dir-watcher/tree.rb,
lib/em-dir-watcher/monitor.rb,
lib/em-dir-watcher/platform/mac.rb,
lib/em-dir-watcher/platform/linux.rb,
lib/em-dir-watcher/platform/windows.rb,
lib/em-dir-watcher/invokers/subprocess_invoker.rb,
lib/em-dir-watcher/platform/mac/rubycocoa_watcher.rb,
lib/em-dir-watcher/platform/mac/ffi_fsevents_watcher.rb,
lib/em-dir-watcher/platform/windows/path_to_ruby_exe.rb

Defined Under Namespace

Modules: Invokers, Platform Classes: Entry, NameGlobMatcher, PathGlobMatcher, RegexpMatcher, Tree

Constant Summary collapse

PLATFORM =
ENV['EM_DIR_WATCHER_PLATFORM'] ||
case Config::CONFIG['target_os']
    when /mswin|mingw/ then 'Windows'
    when /darwin/      then 'Mac'
    when /linux/       then 'Linux'
    else                    'NIX'
end
Watcher =
Platform.const_get(PLATFORM)::Watcher
DEFAULT_OPTIONS =
{
    :exclude => [],
    :include_only => nil,
    :grace_period => 0.0,
}.freeze
INFINITELY_SMALL_PERIOD =
0.001

Class Method Summary collapse

Class Method Details

.watch(path, options = {}) ⇒ Object


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# File 'lib/em-dir-watcher/monitor.rb', line 14

def self.watch path, options={}
    unless (invalid_keys = options.keys - DEFAULT_OPTIONS.keys).empty?
        raise StandardError, "Unsupported options given to EMDirWatcher.watch: " + invalid_keys.join(", ")
    end
    options = DEFAULT_OPTIONS.merge(options)
    grace_period = options[:grace_period]

    tree = Tree.new path, options[:include_only], options[:exclude]

    pending_refresh_requests = Set.new
    process_pending_refresh_requests_scheduled = false

    process_pending_refresh_requests = lambda do
        process_pending_refresh_requests_scheduled = false
        changed_paths = Set.new
        pending_refresh_requests.each do |change_scope, refresh_subtree|
            changed_paths += tree.refresh! change_scope, refresh_subtree
        end
        yield changed_paths.to_a unless changed_paths.empty?
    end

    Watcher.new path, options[:include_only], options[:exclude] do |change_scope, refresh_subtree|
        pending_refresh_requests << [change_scope, refresh_subtree]
        if grace_period <= INFINITELY_SMALL_PERIOD
            process_pending_refresh_requests.call
        else
            unless process_pending_refresh_requests_scheduled
                EM.add_timer grace_period, &process_pending_refresh_requests
                process_pending_refresh_requests_scheduled = true
            end
        end
    end
end