Adding a command that enables converting site to a different metadata format.

Doing this revealed some bugs in the encoding functionality in some of the underlying libraries.
Please backup before using.

commands/convert.go

@@ -0,0 +1,130 @@
+// Copyright © 2013 Steve Francia <spf@spf13.com>.
+//
+// Licensed under the Simple Public License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+// http://opensource.org/licenses/Simple-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package commands
+
+import (
+	"fmt"
+	"path"
+
+	"github.com/spf13/cobra"
+	"github.com/spf13/hugo/hugolib"
+	"github.com/spf13/hugo/parser"
+	jww "github.com/spf13/jwalterweatherman"
+)
+
+var OutputDir string
+var Unsafe bool
+
+var convertCmd = &cobra.Command{
+	Use:   "convert",
+	Short: "Convert will modify your content to different formats",
+	Long:  `Convert will modify your content to different formats`,
+	Run:   nil,
+}
+
+var toJSONCmd = &cobra.Command{
+	Use:   "toJSON",
+	Short: "Convert front matter to JSON",
+	Long: `toJSON will convert all front matter in the content
+	directory to use JSON for the front matter`,
+	Run: func(cmd *cobra.Command, args []string) {
+		err := convertContents(rune([]byte(parser.JSON_LEAD)[0]))
+		if err != nil {
+			jww.ERROR.Println(err)
+		}
+	},
+}
+
+var toTOMLCmd = &cobra.Command{
+	Use:   "toTOML",
+	Short: "Convert front matter to TOML",
+	Long: `toTOML will convert all front matter in the content
+	directory to use TOML for the front matter`,
+	Run: func(cmd *cobra.Command, args []string) {
+		err := convertContents(rune([]byte(parser.TOML_LEAD)[0]))
+		if err != nil {
+			jww.ERROR.Println(err)
+		}
+	},
+}
+
+var toYAMLCmd = &cobra.Command{
+	Use:   "toYAML",
+	Short: "Convert front matter to YAML",
+	Long: `toYAML will convert all front matter in the content
+	directory to use YAML for the front matter`,
+	Run: func(cmd *cobra.Command, args []string) {
+		err := convertContents(rune([]byte(parser.YAML_LEAD)[0]))
+		if err != nil {
+			jww.ERROR.Println(err)
+		}
+	},
+}
+
+func init() {
+	convertCmd.AddCommand(toJSONCmd)
+	convertCmd.AddCommand(toTOMLCmd)
+	convertCmd.AddCommand(toYAMLCmd)
+	convertCmd.PersistentFlags().StringVarP(&OutputDir, "output", "o", "", "filesystem path to write files to")
+	convertCmd.PersistentFlags().BoolVar(&Unsafe, "unsafe", false, "enable less safe operations, please backup first")
+}
+
+func convertContents(mark rune) (err error) {
+	InitializeConfig()
+	site := &hugolib.Site{}
+
+	if err := site.Initialise(); err != nil {
+		return err
+	}
+
+	if site.Source == nil {
+		panic(fmt.Sprintf("site.Source not set"))
+	}
+	if len(site.Source.Files()) < 1 {
+		return fmt.Errorf("No source files found")
+	}
+
+	jww.FEEDBACK.Println("processing", len(site.Source.Files()), "content files")
+	for _, file := range site.Source.Files() {
+		jww.INFO.Println("Attempting to convert", file.LogicalName)
+		page, err := hugolib.NewPage(file.LogicalName)
+		if err != nil {
+			return err
+		}
+
+		psr, err := parser.ReadFrom(file.Contents)
+		if err != nil {
+			return err
+		}
+		metadata, err := psr.Metadata()
+		if err != nil {
+			return err
+		}
+
+		page.Dir = file.Dir
+		page.SetSourceContent(psr.Content())
+		page.SetSourceMetaData(metadata, mark)
+
+		if OutputDir != "" {
+			page.SaveSourceAs(path.Join(OutputDir, page.FullFilePath()))
+		} else {
+			if Unsafe {
+				page.SaveSource()
+			} else {
+				jww.FEEDBACK.Println("Unsafe operation not allowed, use --unsafe or set a different output path")
+			}
+		}
+	}
+	return
+}

commands/hugo.go

@@ -61,6 +61,7 @@ func AddCommands() {
 	HugoCmd.AddCommand(version)
 	HugoCmd.AddCommand(check)
 	HugoCmd.AddCommand(benchmark)
+	HugoCmd.AddCommand(convertCmd)
 }
 
 func init() {