Make auto-date disabled by default

Fixes #2244
Closes #2260

commands/hugo.go

@@ -315,6 +315,7 @@ func loadDefaultSettings() {
 	viper.SetDefault("HasCJKLanguage", false)
 	viper.SetDefault("EnableEmoji", false)
 	viper.SetDefault("PygmentsCodeFencesGuessSyntax", false)
+	viper.SetDefault("UseModTimeAsFallback", false)
 }
 
 // InitializeConfig initializes a config file with sensible default configuration flags.

hugolib/page.go

@@ -663,7 +663,7 @@ func (p *Page) update(f interface{}) error {
 		p.Draft = !*published
 	}
 
-	if p.Date.IsZero() {
+	if p.Date.IsZero() && viper.GetBool("UseModTimeAsFallback") {
 		fi, err := hugofs.Source().Stat(filepath.Join(helpers.AbsPathify(viper.GetString("ContentDir")), p.File.Path()))
 		if err == nil {
 			p.Date = fi.ModTime()