Allow build on unsupported GOOS (#424)

tklauser · web-flow · commit bfa0135e7e73 · 2022-01-24T19:13:06.000-07:00
In cases where fsnotify is a transitive dependency of a package, it might need to be built on platforms not supported (yet), e.g. aix. Provide an empty implemention for these cases, so depending packages don't need to add workarounds. Replaces #314
diff --git a/fsnotify_unsupported.go b/fsnotify_unsupported.go
@@ -0,0 +1,36 @@
+// Copyright 2022 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+//go:build !darwin && !dragonfly && !freebsd && !linux && !netbsd && !solaris && !windows
+// +build !darwin,!dragonfly,!freebsd,!linux,!netbsd,!solaris,!windows
+
+package fsnotify
+
+import (
+	"fmt"
+	"runtime"
+)
+
+// Watcher watches a set of files, delivering events to a channel.
+type Watcher struct{}
+
+// NewWatcher establishes a new watcher with the underlying OS and begins waiting for events.
+func NewWatcher() (*Watcher, error) {
+	return nil, fmt.Errorf("fsnotify not supported on %s", runtime.GOOS)
+}
+
+// Close removes all watches and closes the events channel.
+func (w *Watcher) Close() error {
+	return nil
+}
+
+// Add starts watching the named file or directory (non-recursively).
+func (w *Watcher) Add(name string) error {
+	return nil
+}
+
+// Remove stops watching the the named file or directory (non-recursively).
+func (w *Watcher) Remove(name string) error {
+	return nil
+}
