Add 'bolt set'.

cmd/bolt/main.go

@@ -23,17 +23,22 @@ func NewApp() *cli.App {
 	app.Commands = []cli.Command{
 		{
 			Name:   "get",
-			Usage:  "retrieve a value for given key",
+			Usage:  "Retrieve a value for given key in a bucket",
 			Action: GetCommand,
 		},
+		{
+			Name:   "set",
+			Usage:  "Sets a value for given key in a bucket",
+			Action: SetCommand,
+		},
 		{
 			Name:   "keys",
-			Usage:  "retrieve a list of all keys in a bucket",
+			Usage:  "Retrieve a list of all keys in a bucket",
 			Action: KeysCommand,
 		},
 		{
 			Name:   "pages",
-			Usage:  "dump page information for a database",
+			Usage:  "Dumps page information for a database",
 			Action: PagesCommand,
 		},
 	}
@@ -79,6 +84,38 @@ func GetCommand(c *cli.Context) {
 	}
 }
 
+// SetCommand sets the value for a given key in a bucket.
+func SetCommand(c *cli.Context) {
+	path, name, key, value := c.Args().Get(0), c.Args().Get(1), c.Args().Get(2), c.Args().Get(3)
+	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.Do(func(tx *bolt.Tx) error {
+		// Find bucket.
+		b := tx.Bucket(name)
+		if b == nil {
+			fatalf("bucket not found: %s", name)
+			return nil
+		}
+
+		// Set value for a given key.
+		return b.Put([]byte(key), []byte(value))
+	})
+	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)

cmd/bolt/main_test.go

@@ -53,6 +53,35 @@ func TestGetKeyNotFound(t *testing.T) {
 	})
 }
 
+// Ensure that a value can be set from the CLI.
+func TestSet(t *testing.T) {
+	SetTestMode(true)
+	open(func(db *bolt.DB) {
+		db.Do(func(tx *bolt.Tx) error {
+			tx.CreateBucket("widgets")
+			return nil
+		})
+		assert.Equal(t, "", run("set", db.Path(), "widgets", "foo", "bar"))
+		assert.Equal(t, "bar", run("get", db.Path(), "widgets", "foo"))
+	})
+}
+
+// Ensure that an error is reported if the database is not found.
+func TestSetDBNotFound(t *testing.T) {
+	SetTestMode(true)
+	output := run("set", "no/such/db", "widgets", "foo", "bar")
+	assert.Equal(t, "stat no/such/db: no such file or directory", output)
+}
+
+// Ensure that an error is reported if the bucket is not found.
+func TestSetBucketNotFound(t *testing.T) {
+	SetTestMode(true)
+	open(func(db *bolt.DB) {
+		output := run("set", db.Path(), "widgets", "foo", "bar")
+		assert.Equal(t, "bucket not found: widgets", output)
+	})
+}
+
 // Ensure that a list of keys can be retrieved for a given bucket.
 func TestKeys(t *testing.T) {
 	SetTestMode(true)