replace zxq.co/ripple/hanayo

vendor/github.com/rjeczalik/notify/example_inotify_test.go

@@ -0,0 +1,84 @@
+// Copyright (c) 2014-2015 The Notify Authors. All rights reserved.
+// Use of this source code is governed by the MIT license that can be
+// found in the LICENSE file.
+
+// +build linux
+
+package notify_test
+
+import (
+	"log"
+
+	"golang.org/x/sys/unix"
+
+	"github.com/rjeczalik/notify"
+)
+
+// This example shows how to watch changes made on file-system by text editor
+// when saving a file. Usually, either InCloseWrite or InMovedTo (when swapping
+// with a temporary file) event is created.
+func ExampleWatch_linux() {
+	// Make the channel buffered to ensure no event is dropped. Notify will drop
+	// an event if the receiver is not able to keep up the sending pace.
+	c := make(chan notify.EventInfo, 1)
+
+	// Set up a watchpoint listening for inotify-specific events within a
+	// current working directory. Dispatch each InCloseWrite and InMovedTo
+	// events separately to c.
+	if err := notify.Watch(".", c, notify.InCloseWrite, notify.InMovedTo); err != nil {
+		log.Fatal(err)
+	}
+	defer notify.Stop(c)
+
+	// Block until an event is received.
+	switch ei := <-c; ei.Event() {
+	case notify.InCloseWrite:
+		log.Println("Editing of", ei.Path(), "file is done.")
+	case notify.InMovedTo:
+		log.Println("File", ei.Path(), "was swapped/moved into the watched directory.")
+	}
+}
+
+// This example shows how to use Sys() method from EventInfo interface to tie
+// two separate events generated by rename(2) function.
+func ExampleWatch_linuxMove() {
+	// Make the channel buffered to ensure no event is dropped. Notify will drop
+	// an event if the receiver is not able to keep up the sending pace.
+	c := make(chan notify.EventInfo, 2)
+
+	// Set up a watchpoint listening for inotify-specific events within a
+	// current working directory. Dispatch each InMovedFrom and InMovedTo
+	// events separately to c.
+	if err := notify.Watch(".", c, notify.InMovedFrom, notify.InMovedTo); err != nil {
+		log.Fatal(err)
+	}
+	defer notify.Stop(c)
+
+	// Inotify reports move filesystem action by sending two events tied with
+	// unique cookie value (uint32): one of the events is of InMovedFrom type
+	// carrying move source path, while the second one is of InMoveTo type
+	// carrying move destination path.
+	moves := make(map[uint32]struct {
+		From string
+		To   string
+	})
+
+	// Wait for moves.
+	for ei := range c {
+		cookie := ei.Sys().(*unix.InotifyEvent).Cookie
+
+		info := moves[cookie]
+		switch ei.Event() {
+		case notify.InMovedFrom:
+			info.From = ei.Path()
+		case notify.InMovedTo:
+			info.To = ei.Path()
+		}
+		moves[cookie] = info
+
+		if cookie != 0 && info.From != "" && info.To != "" {
+			log.Println("File:", info.From, "was renamed to", info.To)
+			delete(moves, cookie)
+		}
+	}
+}