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, 37 insertions, 0 deletions

diff --git a/cmd/bolt/export_test.go b/cmd/bolt/export_test.go
new file mode 100644
index 0000000..3d6c21a
--- /dev/null
+++ b/cmd/bolt/export_test.go
@@ -0,0 +1,37 @@
+package main_test
+
+import (
+	"testing"
+
+	"github.com/boltdb/bolt"
+	. "github.com/boltdb/bolt/cmd/bolt"
+	"github.com/stretchr/testify/assert"
+)
+
+// Ensure that a database can be exported.
+func TestExport(t *testing.T) {
+	SetTestMode(true)
+	open(func(db *bolt.DB, path string) {
+		db.Update(func(tx *bolt.Tx) error {
+			tx.CreateBucket("widgets")
+			b := tx.Bucket("widgets")
+			b.Put([]byte("foo"), []byte("0000"))
+			b.Put([]byte("bar"), []byte(""))
+
+			tx.CreateBucket("woojits")
+			b = tx.Bucket("woojits")
+			b.Put([]byte("baz"), []byte("XXXX"))
+			return nil
+		})
+		db.Close()
+		output := run("export", path)
+		assert.Equal(t, `[{"type":"bucket","key":"d2lkZ2V0cw==","value":[{"key":"YmFy","value":""},{"key":"Zm9v","value":"MDAwMA=="}]},{"type":"bucket","key":"d29vaml0cw==","value":[{"key":"YmF6","value":"WFhYWA=="}]}]`, output)
+	})
+}
+
+// Ensure that an error is reported if the database is not found.
+func TestExport_NotFound(t *testing.T) {
+	SetTestMode(true)
+	output := run("export", "no/such/db")
+	assert.Equal(t, "stat no/such/db: no such file or directory", output)
+}