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package main
import (
"bytes"
"log"
"os"
"strconv"
"github.com/boltdb/bolt"
"github.com/codegangsta/cli"
)
func main() {
log.SetFlags(0)
NewApp().Run(os.Args)
}
// NewApp creates an Application instance.
func NewApp() *cli.App {
app := cli.NewApp()
app.Name = "bolt"
app.Usage = "BoltDB toolkit"
app.Commands = []cli.Command{
{
Name: "get",
Usage: "retrieve a value for given key",
Action: GetCommand,
},
{
Name: "keys",
Usage: "retrieve a list of all keys in a bucket",
Action: KeysCommand,
},
{
Name: "pages",
Usage: "dump page information for a database",
Action: PagesCommand,
},
}
return app
}
// GetCommand retrieves the value for a given bucket/key.
func GetCommand(c *cli.Context) {
path, name, key := c.Args().Get(0), c.Args().Get(1), c.Args().Get(2)
if _, err := os.Stat(path); os.IsNotExist(err) {
fatal(err)
return
}
db, err := bolt.Open(path, 0600)
if err != nil {
fatal(err)
return
}
defer db.Close()
err = db.With(func(tx *bolt.Tx) error {
// Find bucket.
b := tx.Bucket(name)
if b == nil {
fatalf("bucket not found: %s", name)
return nil
}
// Find value for a given key.
value := b.Get([]byte(key))
if value == nil {
fatalf("key not found: %s", key)
return nil
}
logger.Println(string(value))
return nil
})
if err != nil {
fatal(err)
return
}
}
// KeysCommand retrieves a list of keys for a given bucket.
func KeysCommand(c *cli.Context) {
path, name := c.Args().Get(0), c.Args().Get(1)
if _, err := os.Stat(path); os.IsNotExist(err) {
fatal(err)
return
}
db, err := bolt.Open(path, 0600)
if err != nil {
fatal(err)
return
}
defer db.Close()
err = db.With(func(tx *bolt.Tx) error {
// Find bucket.
b := tx.Bucket(name)
if b == nil {
fatalf("bucket not found: %s", name)
return nil
}
// Iterate over each key.
return b.ForEach(func(key, _ []byte) error {
logger.Println(string(key))
return nil
})
})
if err != nil {
fatal(err)
return
}
}
// PagesCommand prints a list of all pages in a database.
func PagesCommand(c *cli.Context) {
path := c.Args().Get(0)
if _, err := os.Stat(path); os.IsNotExist(err) {
fatal(err)
return
}
db, err := bolt.Open(path, 0600)
if err != nil {
fatal(err)
return
}
defer db.Close()
logger.Println("ID TYPE ITEMS OVRFLW")
logger.Println("======== ========== ====== ======")
db.Do(func(tx *bolt.Tx) error {
var id int
for {
p, err := tx.Page(id)
if err != nil {
fatalf("page error: %d: %s", id, err)
} else if p == nil {
break
}
var overflow string
if p.OverflowCount > 0 {
overflow = strconv.Itoa(p.OverflowCount)
}
logger.Printf("%-8d %-10s %-6d %-6s", p.ID, p.Type, p.Count, overflow)
id += 1 + p.OverflowCount
}
return nil
})
}
var logger = log.New(os.Stderr, "", 0)
var logBuffer *bytes.Buffer
func fatal(v ...interface{}) {
logger.Print(v...)
if !testMode {
os.Exit(1)
}
}
func fatalf(format string, v ...interface{}) {
logger.Printf(format, v...)
if !testMode {
os.Exit(1)
}
}
func fatalln(v ...interface{}) {
logger.Println(v...)
if !testMode {
os.Exit(1)
}
}
// LogBuffer returns the contents of the log.
// This only works while the CLI is in test mode.
func LogBuffer() string {
if logBuffer != nil {
return logBuffer.String()
}
return ""
}
var testMode bool
// SetTestMode sets whether the CLI is running in test mode and resets the logger.
func SetTestMode(value bool) {
testMode = value
if testMode {
logBuffer = bytes.NewBuffer(nil)
logger = log.New(logBuffer, "", 0)
} else {
logger = log.New(os.Stderr, "", 0)
}
}
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