From ebdd7f47d353306a461738ed0465ad36d9d541f4 Mon Sep 17 00:00:00 2001
From: Toby Wilkes <toby.wilkes@humblebunny.com>
Date: Thu, 8 Aug 2019 00:00:17 +0900
Subject: [PATCH] Add watch-ignore command

---
 common.go |  2 +-
 watch.go  | 13 +++++++++++++
 2 files changed, 14 insertions(+), 1 deletion(-)

diff --git a/common.go b/common.go
index 9a601b3..5d300d1 100644
--- a/common.go
+++ b/common.go
@@ -14,7 +14,7 @@ import (
 // Binary name used for built package
 const binaryName = "watcher"
 
-var watcherFlags = []string{"run", "watch", "watch-vendor"}
+var watcherFlags = []string{"run", "watch", "watch-vendor", "watch-ignore"}
 
 // Params is used for keeping go-watcher and application flag parameters
 type Params struct {
diff --git a/watch.go b/watch.go
index 0704936..1674e36 100644
--- a/watch.go
+++ b/watch.go
@@ -28,6 +28,7 @@ type Watcher struct {
 	rootdir     string
 	watcher     *fsnotify.Watcher
 	watchVendor bool
+	ignorePaths string
 	// when a file gets changed a message is sent to the update channel
 	update chan struct{}
 }
@@ -49,6 +50,7 @@ func MustRegisterWatcher(params *Params) *Watcher {
 		update:      make(chan struct{}),
 		rootdir:     params.Get("watch"),
 		watchVendor: watchVendor,
+		ignorePaths: params.Get("watch-ignore"),
 	}
 
 	w.watcher, err = fsnotify.NewWatcher()
@@ -130,6 +132,9 @@ func (w *Watcher) watchFolders() {
 		log.Fatalf("Could not get root working directory: %s", err)
 	}
 
+	// Unpack ignores
+	ignorePaths := strings.Split(w.ignorePaths, ";")
+
 	filepath.Walk(wd, func(path string, info os.FileInfo, err error) error {
 		// skip files
 		if info == nil {
@@ -148,6 +153,14 @@ func (w *Watcher) watchFolders() {
 			}
 		}
 
+		// skip ignored files
+		relative := strings.TrimPrefix(path, wd)
+		for _, ignorePath := range ignorePaths {
+			if strings.TrimPrefix(relative, "/") == ignorePath {
+				return filepath.SkipDir
+			}
+		}
+
 		// skip hidden folders
 		if len(path) > 1 && strings.HasPrefix(filepath.Base(path), ".") {
 			return filepath.SkipDir