Add support for dynamic reloading of config file when watching

commands/hugo.go

@@ -17,7 +17,6 @@ package commands
 
 import (
 	"fmt"
-	"github.com/spf13/hugo/parser"
 	"io/ioutil"
 	"net/http"
 	"os"
@@ -27,6 +26,8 @@ import (
 	"sync"
 	"time"
 
+	"github.com/spf13/hugo/parser"
+
 	"github.com/spf13/cobra"
 	"github.com/spf13/fsync"
 	"github.com/spf13/hugo/helpers"
@@ -53,6 +54,7 @@ built with love by spf13 and friends in Go.
 Complete documentation is available at http://gohugo.io/.`,
 	Run: func(cmd *cobra.Command, args []string) {
 		InitializeConfig()
+		watchConfig()
 		build()
 	},
 }
@@ -312,6 +314,18 @@ func InitializeConfig() {
 	}
 }
 
+func watchConfig() {
+	viper.WatchConfig()
+	viper.OnConfigChange(func(e fsnotify.Event) {
+		fmt.Println("Config file changed:", e.Name)
+		utils.CheckErr(buildSite(true))
+		if !viper.GetBool("DisableLiveReload") {
+			// Will block forever trying to write to a channel that nobody is reading if livereload isn't initalized
+			livereload.ForceRefresh()
+		}
+	})
+}
+
 func build(watches ...bool) {
 	utils.CheckErr(copyStatic(), fmt.Sprintf("Error copying static files to %s", helpers.AbsPathify(viper.GetString("PublishDir"))))
 	watch := false

commands/server.go

@@ -93,6 +93,7 @@ func server(cmd *cobra.Command, args []string) {
 
 	if viper.GetBool("watch") {
 		serverWatch = true
+		watchConfig()
 	}
 
 	l, err := net.Listen("tcp", net.JoinHostPort(serverInterface, strconv.Itoa(serverPort)))

docs/content/meta/release-notes.md

@@ -14,6 +14,7 @@ weight: 10
 * Have Jekyll site, but dreaming of porting it to Hugo? This release introduces a new `hugo import jekyll`command that makes this easier than ever. [1469](https://github.com/spf13/hugo/pull/1469)
 * We now use a custom-built `LazyFileReader` for reading file contents, which means we don't read media files in `/content` into memory anymore -- and file reading is now performed in parallel on multicore PCs. [1181](https://github.com/spf13/hugo/issues/1181)
 * Hugo is now built with `Go 1.5` which, among many other improvements, have fixed the last known data race in Hugo. [917] (https://github.com/spf13/hugo/issues/917)
+* Hugo now supports dynamic reloading of the config file when watching.
 * Lots of fixes and improvements in the template funcs:
 	* The new `dict` function that could be used to pass maps into a template.[1463](https://github.com/spf13/hugo/pull/1463)
 	* The new `pluralize` and `singularize` template funcs.
@@ -372,4 +373,3 @@ This release represents over 65 code commits from 6 different contributors.
 
 ## **0.5.0** June 25, 2013
   * Hugo is quite usable and able to build spf13.com
-