From b5b6e81c0269abf9b0f4bc6a127744a25344e5c6 Mon Sep 17 00:00:00 2001
From: xofyarg <xofyarg@users.noreply.github.com>
Date: Sat, 22 Apr 2017 21:38:54 +0100
Subject: [PATCH] hugolib: Ignore non-source files on partial rebuild

Partial rebuild does not have the same logic as normal rebuild on
selecting which file to build. This change makes it possible to
share the file select logic between two kinds of build.

Fix #3325.
---
 hugolib/site.go      | 12 ++++++++++++
 source/filesystem.go |  4 ++--
 2 files changed, 14 insertions(+), 2 deletions(-)

diff --git a/hugolib/site.go b/hugolib/site.go
index 3b7d47533..f2ebee4cc 100644
--- a/hugolib/site.go
+++ b/hugolib/site.go
@@ -728,6 +728,9 @@ func (s *Site) reProcess(events []fsnotify.Event) (whatChanged, error) {
 		go pageConverter(pageChan, convertResults, wg2)
 	}
 
+	sp := source.NewSourceSpec(s.Cfg, s.Fs)
+	fs := sp.NewFilesystem("")
+
 	for _, ev := range sourceChanged {
 		// The incrementalReadCollator below will also make changes to the site's pages,
 		// so we do this first to prevent races.
@@ -750,6 +753,15 @@ func (s *Site) reProcess(events []fsnotify.Event) (whatChanged, error) {
 			}
 		}
 
+		// ignore files shouldn't be proceed
+		if fi, err := s.Fs.Source.Stat(ev.Name); err != nil {
+			continue
+		} else {
+			if ok, err := fs.ShouldRead(ev.Name, fi); err != nil || !ok {
+				continue
+			}
+		}
+
 		sourceReallyChanged = append(sourceReallyChanged, ev)
 	}
 
diff --git a/source/filesystem.go b/source/filesystem.go
index a13128144..ceea96ea5 100644
--- a/source/filesystem.go
+++ b/source/filesystem.go
@@ -90,7 +90,7 @@ func (f *Filesystem) captureFiles() {
 			return nil
 		}
 
-		b, err := f.shouldRead(filePath, fi)
+		b, err := f.ShouldRead(filePath, fi)
 		if err != nil {
 			return err
 		}
@@ -118,7 +118,7 @@ func (f *Filesystem) captureFiles() {
 
 }
 
-func (f *Filesystem) shouldRead(filePath string, fi os.FileInfo) (bool, error) {
+func (f *Filesystem) ShouldRead(filePath string, fi os.FileInfo) (bool, error) {
 	if fi.Mode()&os.ModeSymlink == os.ModeSymlink {
 		link, err := filepath.EvalSymlinks(filePath)
 		if err != nil {