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package main
import (
"fmt"
"strings"
"github.com/pkg/errors"
"github.com/spf13/cobra"
bolt "go.etcd.io/bbolt"
)
var (
dumpBoltDescription = `Dumps a bolt database. The output format should not be depended upon.`
dumpBoltCommand = &cobra.Command{
Use: "dumpbolt",
Short: "Dump a bolt database",
Long: dumpBoltDescription,
RunE: dumpBoltCmd,
Example: "DATABASE",
Args: cobra.ExactArgs(1),
Hidden: true,
}
)
func dumpBoltCmd(c *cobra.Command, args []string) error {
db, err := bolt.Open(args[0], 0600, &bolt.Options{ReadOnly: true})
if err != nil {
return errors.Wrapf(err, "error opening database %q", args[0])
}
defer db.Close()
encode := func(value []byte) string {
var b strings.Builder
for i := range value {
if value[i] <= 32 || value[i] >= 127 {
b.WriteString(fmt.Sprintf("\\%03o", value[i]))
} else {
b.WriteByte(value[i])
}
}
return b.String()
}
return db.View(func(tx *bolt.Tx) error {
var dumpBucket func(string, []byte, *bolt.Bucket) error
dumpBucket = func(indent string, name []byte, b *bolt.Bucket) error {
var subs [][]byte
indentMore := " "
fmt.Printf("%s%s:\n", indent, encode(name))
err := b.ForEach(func(k, v []byte) (err error) {
if v == nil {
subs = append(subs, k)
} else {
_, err = fmt.Printf("%s%s: %s\n", indent+indentMore, encode(k), encode(v))
}
return err
})
if err != nil {
return err
}
for _, sub := range subs {
subbucket := b.Bucket(sub)
if err = dumpBucket(indent+indentMore, sub, subbucket); err != nil {
return err
}
}
return err
}
return tx.ForEach(func(name []byte, b *bolt.Bucket) error { return dumpBucket("", name, b) })
})
}
func init() {
rootCmd.AddCommand(dumpBoltCommand)
}
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