main.go

package main

import (
	"fmt"
	"log"
	"os"
	"path/filepath"
	"regexp"
	"time"

	"github.com/jordan-wright/email"
)

func main() {
	matches, err := filepath.Glob("/offlineimap/data/mail/**/*/*")
	if err != nil {
		panic(err)
	}

	var (
		begin = time.Now()
		count int
	)
	for _, emf := range matches {
		if ignore, _ := regexp.MatchString("/offlineimap/data/mail/.notmuch/.*", emf); ignore {
			continue
		}
		count++
		f, err := os.Open(emf)
		if err != nil {
			log.Printf("error opening %q: %s", emf, err)
			continue
		}

		if _, err := email.NewEmailFromReader(f); err != nil {
			log.Printf("error reading %q: %s", emf, err)
		}
		f.Close()
	}
	fmt.Printf("it took %s to parse %d emails", time.Since(begin), count)
}