Add never really used code to build a recordio file from multiple emails.

cmd/recordio/recordio.go

@@ -0,0 +1,70 @@
+package main
+
+import (
+	"compress/gzip"
+	"flag"
+	"io"
+	"io/ioutil"
+	"os"
+	"path/filepath"
+
+	"github.com/eclesh/recordio"
+	"github.com/golang/glog"
+	"xinu.tv/email/maildir"
+)
+
+var (
+	maildirPath  = flag.String("maildir", filepath.Join(os.Getenv("HOME"), "Maildir"), "Maildir path")
+	recordIOPath = flag.String("recordio", "/tmp/maildir.rio", "path to recordIO file")
+	compress     = flag.Bool("z", false, "compress output")
+)
+
+func main() {
+	flag.Parse()
+	defer glog.Flush()
+	count := 0
+	f, err := os.Create(*recordIOPath)
+	if err != nil {
+		glog.Exitf("Failed to open %q: %v", *recordIOPath, err)
+	}
+	var gzf *gzip.Writer
+	if *compress {
+		gzf, err = gzip.NewWriterLevel(f, gzip.BestCompression)
+		if err != nil {
+			glog.Exitf("Failed to create gzip writer: %v", err)
+		}
+	}
+
+	var w io.Writer
+	if *compress {
+		w = recordio.NewWriter(gzf)
+	} else {
+		w = recordio.NewWriter(f)
+	}
+	if err := maildir.Walk(*maildirPath, func(path string) error {
+		b, err := ioutil.ReadFile(path)
+		if err != nil {
+			return err
+		}
+		if _, err := w.Write(b); err != nil {
+			return err
+		}
+		count++
+		if count%1000 == 0 {
+			glog.Infof("Processed %d files", count)
+		}
+		return nil
+	}); err != nil {
+		glog.Exitf("Failed to walk %q: %v", *maildirPath, err)
+	}
+
+	if *compress {
+		if err := gzf.Flush(); err != nil {
+			glog.Exitf("Failed to flush gzipper on %q: %v", *recordIOPath, err)
+		}
+	}
+
+	if err := f.Close(); err != nil {
+		glog.Exitf("Failed to close %q: %v", *recordIOPath, err)
+	}
+}