Add import/export to CLI.

This commit adds two new commands:

    bolt import --input INPUT PATH
    bolt export PATH

This exports the database in a simple, nested, key/value JSON document.
Each node in the document has a "key", a "value", and an optional "type".
The key and value fields are both base64 encoded.

1 files changed, 26 insertions, 0 deletions

diff --git a/cmd/bolt/main.go b/cmd/bolt/main.go
index ff3c1bf..1930e7d 100644
--- a/cmd/bolt/main.go
+++ b/cmd/bolt/main.go
@@ -2,6 +2,7 @@ package main
 
 import (
 	"bytes"
+	"encoding/json"
 	"fmt"
 	"log"
 	"os"
@@ -56,6 +57,24 @@ func NewApp() *cli.App {
 			},
 		},
 		{
+			Name:  "import",
+			Usage: "Imports from a JSON dump into a database",
+			Flags: []cli.Flag{
+				&cli.StringFlag{Name: "input"},
+			},
+			Action: func(c *cli.Context) {
+				Import(c.Args().Get(0), c.String("input"))
+			},
+		},
+		{
+			Name:  "export",
+			Usage: "Exports a database to JSON",
+			Action: func(c *cli.Context) {
+				path := c.Args().Get(0)
+				Export(path)
+			},
+		},
+		{
 			Name:  "pages",
 			Usage: "Dumps page information for a database",
 			Action: func(c *cli.Context) {
@@ -144,3 +163,10 @@ func SetTestMode(value bool) {
 		logger = log.New(os.Stderr, "", 0)
 	}
 }
+
+// rawMessage represents a JSON element in the import/export document.
+type rawMessage struct {
+	Type  string          `json:"type,omitempty"`
+	Key   []byte          `json:"key"`
+	Value json.RawMessage `json:"value"`
+}