add import+export, json output, humanize wide output, fixes

output/write.go

@@ -0,0 +1,34 @@
+package output
+
+import (
+	"encoding/json"
+	"fmt"
+	"os"
+
+	"github.com/tlinden/anydb/app"
+	"github.com/tlinden/anydb/cfg"
+)
+
+func WriteFile(attr *app.DbAttr, conf *cfg.Config, entries app.DbEntries) error {
+	jsonentries, err := json.Marshal(entries)
+	if err != nil {
+		return fmt.Errorf("json marshalling failure: %s", err)
+	}
+
+	if attr.File == "-" {
+		fmt.Println(string(jsonentries))
+	} else {
+		fd, err := os.OpenFile(attr.File, os.O_RDWR|os.O_CREATE|os.O_TRUNC, 0600)
+		if err != nil {
+			return err
+		}
+
+		if _, err := fd.Write(jsonentries); err != nil {
+			return err
+		}
+
+		fmt.Printf("database contents exported to %s\n", attr.File)
+	}
+
+	return nil
+}