diff --git a/Cargo.lock b/Cargo.lock
index de1a06c..6306dee 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -1,21 +1,22 @@
 [root]
 name = "tantivy-cli"
-version = "0.2.0"
+version = "0.3.0"
 dependencies = [
  "ansi_term 0.8.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "bincode 0.4.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "byteorder 0.5.3 (registry+https://github.com/rust-lang/crates.io-index)",
- "chan 0.1.18 (registry+https://github.com/rust-lang/crates.io-index)",
- "clap 2.19.3 (registry+https://github.com/rust-lang/crates.io-index)",
+ "chan 0.1.19 (registry+https://github.com/rust-lang/crates.io-index)",
+ "clap 2.23.3 (registry+https://github.com/rust-lang/crates.io-index)",
  "env_logger 0.3.5 (registry+https://github.com/rust-lang/crates.io-index)",
+ "futures 0.1.13 (registry+https://github.com/rust-lang/crates.io-index)",
  "iron 0.4.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "log 0.3.6 (registry+https://github.com/rust-lang/crates.io-index)",
+ "log 0.3.7 (registry+https://github.com/rust-lang/crates.io-index)",
  "mount 0.2.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "persistent 0.2.1 (registry+https://github.com/rust-lang/crates.io-index)",
- "rustc-serialize 0.3.22 (registry+https://github.com/rust-lang/crates.io-index)",
+ "rustc-serialize 0.3.24 (registry+https://github.com/rust-lang/crates.io-index)",
  "staticfile 0.3.1 (registry+https://github.com/rust-lang/crates.io-index)",
- "tantivy 0.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "time 0.1.35 (registry+https://github.com/rust-lang/crates.io-index)",
+ "tantivy 0.3.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "time 0.1.36 (registry+https://github.com/rust-lang/crates.io-index)",
  "urlencoded 0.4.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "version 2.0.1 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
@@ -28,6 +29,14 @@ dependencies = [
  "memchr 0.1.11 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
+[[package]]
+name = "aho-corasick"
+version = "0.6.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "memchr 1.0.1 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
 [[package]]
 name = "ansi_term"
 version = "0.8.0"
@@ -45,28 +54,68 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
 name = "atomicwrites"
-version = "0.0.14"
+version = "0.1.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "kernel32-sys 0.2.2 (registry+https://github.com/rust-lang/crates.io-index)",
+ "nix 0.7.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "tempdir 0.3.5 (registry+https://github.com/rust-lang/crates.io-index)",
  "winapi 0.2.8 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
+[[package]]
+name = "atty"
+version = "0.2.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "kernel32-sys 0.2.2 (registry+https://github.com/rust-lang/crates.io-index)",
+ "libc 0.2.21 (registry+https://github.com/rust-lang/crates.io-index)",
+ "winapi 0.2.8 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
 [[package]]
 name = "bincode"
 version = "0.4.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "byteorder 0.4.2 (registry+https://github.com/rust-lang/crates.io-index)",
- "num 0.1.36 (registry+https://github.com/rust-lang/crates.io-index)",
- "rustc-serialize 0.3.22 (registry+https://github.com/rust-lang/crates.io-index)",
+ "num 0.1.37 (registry+https://github.com/rust-lang/crates.io-index)",
+ "rustc-serialize 0.3.24 (registry+https://github.com/rust-lang/crates.io-index)",
  "serde 0.6.15 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
+[[package]]
+name = "bincode"
+version = "0.5.9"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "byteorder 0.5.3 (registry+https://github.com/rust-lang/crates.io-index)",
+ "num-traits 0.1.37 (registry+https://github.com/rust-lang/crates.io-index)",
+ "rustc-serialize 0.3.24 (registry+https://github.com/rust-lang/crates.io-index)",
+ "serde 0.7.15 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
+name = "bit-set"
+version = "0.4.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "bit-vec 0.4.3 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
+name = "bit-vec"
+version = "0.4.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+
 [[package]]
 name = "bitflags"
-version = "0.7.0"
+version = "0.4.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+
+[[package]]
+name = "bitflags"
+version = "0.8.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
@@ -77,8 +126,8 @@ dependencies = [
  "iron 0.4.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "persistent 0.2.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "plugin 0.2.6 (registry+https://github.com/rust-lang/crates.io-index)",
- "serde 0.8.22 (registry+https://github.com/rust-lang/crates.io-index)",
- "serde_json 0.8.4 (registry+https://github.com/rust-lang/crates.io-index)",
+ "serde 0.8.23 (registry+https://github.com/rust-lang/crates.io-index)",
+ "serde_json 0.8.6 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -91,9 +140,19 @@ name = "byteorder"
 version = "0.5.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
+[[package]]
+name = "byteorder"
+version = "1.0.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+
+[[package]]
+name = "cfg-if"
+version = "0.1.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+
 [[package]]
 name = "chan"
-version = "0.1.18"
+version = "0.1.19"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "rand 0.3.15 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -101,22 +160,22 @@ dependencies = [
 
 [[package]]
 name = "clap"
-version = "2.19.3"
+version = "2.23.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "ansi_term 0.9.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "bitflags 0.7.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "libc 0.2.19 (registry+https://github.com/rust-lang/crates.io-index)",
- "strsim 0.5.2 (registry+https://github.com/rust-lang/crates.io-index)",
- "term_size 0.2.1 (registry+https://github.com/rust-lang/crates.io-index)",
- "unicode-segmentation 0.1.3 (registry+https://github.com/rust-lang/crates.io-index)",
+ "atty 0.2.2 (registry+https://github.com/rust-lang/crates.io-index)",
+ "bitflags 0.8.2 (registry+https://github.com/rust-lang/crates.io-index)",
+ "strsim 0.6.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "term_size 0.3.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "unicode-segmentation 1.1.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "unicode-width 0.1.4 (registry+https://github.com/rust-lang/crates.io-index)",
- "vec_map 0.6.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "vec_map 0.7.0 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
 name = "combine"
-version = "2.0.0"
+version = "2.3.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "ascii 0.7.1 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -127,7 +186,7 @@ name = "conduit-mime-types"
 version = "0.7.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "rustc-serialize 0.3.22 (registry+https://github.com/rust-lang/crates.io-index)",
+ "rustc-serialize 0.3.24 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -135,8 +194,8 @@ name = "cookie"
 version = "0.2.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "time 0.1.35 (registry+https://github.com/rust-lang/crates.io-index)",
- "url 1.2.4 (registry+https://github.com/rust-lang/crates.io-index)",
+ "time 0.1.36 (registry+https://github.com/rust-lang/crates.io-index)",
+ "url 1.4.0 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -149,12 +208,17 @@ name = "dtoa"
 version = "0.2.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
+[[package]]
+name = "either"
+version = "1.1.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+
 [[package]]
 name = "env_logger"
 version = "0.3.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "log 0.3.6 (registry+https://github.com/rust-lang/crates.io-index)",
+ "log 0.3.7 (registry+https://github.com/rust-lang/crates.io-index)",
  "regex 0.1.80 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
@@ -163,7 +227,7 @@ name = "error"
 version = "0.1.9"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "traitobject 0.0.3 (registry+https://github.com/rust-lang/crates.io-index)",
+ "traitobject 0.1.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "typeable 0.1.2 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
@@ -173,13 +237,13 @@ version = "0.2.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "kernel32-sys 0.2.2 (registry+https://github.com/rust-lang/crates.io-index)",
- "libc 0.2.19 (registry+https://github.com/rust-lang/crates.io-index)",
+ "libc 0.2.21 (registry+https://github.com/rust-lang/crates.io-index)",
  "winapi 0.2.8 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
 name = "fst"
-version = "0.1.35"
+version = "0.1.38"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "byteorder 0.5.3 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -188,9 +252,23 @@ dependencies = [
  "utf8-ranges 0.1.3 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
+[[package]]
+name = "futures"
+version = "0.1.13"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+
+[[package]]
+name = "futures-cpupool"
+version = "0.1.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "futures 0.1.13 (registry+https://github.com/rust-lang/crates.io-index)",
+ "num_cpus 1.3.0 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
 [[package]]
 name = "gcc"
-version = "0.3.41"
+version = "0.3.45"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
@@ -203,42 +281,42 @@ name = "hpack"
 version = "0.2.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "log 0.3.6 (registry+https://github.com/rust-lang/crates.io-index)",
+ "log 0.3.7 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
 name = "httparse"
-version = "1.2.1"
+version = "1.2.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
 name = "hyper"
-version = "0.9.14"
+version = "0.9.18"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "cookie 0.2.5 (registry+https://github.com/rust-lang/crates.io-index)",
- "httparse 1.2.1 (registry+https://github.com/rust-lang/crates.io-index)",
+ "httparse 1.2.2 (registry+https://github.com/rust-lang/crates.io-index)",
  "language-tags 0.2.2 (registry+https://github.com/rust-lang/crates.io-index)",
- "log 0.3.6 (registry+https://github.com/rust-lang/crates.io-index)",
- "mime 0.2.2 (registry+https://github.com/rust-lang/crates.io-index)",
- "num_cpus 1.2.1 (registry+https://github.com/rust-lang/crates.io-index)",
- "rustc-serialize 0.3.22 (registry+https://github.com/rust-lang/crates.io-index)",
+ "log 0.3.7 (registry+https://github.com/rust-lang/crates.io-index)",
+ "mime 0.2.3 (registry+https://github.com/rust-lang/crates.io-index)",
+ "num_cpus 1.3.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "rustc-serialize 0.3.24 (registry+https://github.com/rust-lang/crates.io-index)",
  "solicit 0.4.4 (registry+https://github.com/rust-lang/crates.io-index)",
- "time 0.1.35 (registry+https://github.com/rust-lang/crates.io-index)",
+ "time 0.1.36 (registry+https://github.com/rust-lang/crates.io-index)",
  "traitobject 0.0.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "typeable 0.1.2 (registry+https://github.com/rust-lang/crates.io-index)",
  "unicase 1.4.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "url 1.2.4 (registry+https://github.com/rust-lang/crates.io-index)",
+ "url 1.4.0 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
 name = "idna"
-version = "0.1.0"
+version = "0.1.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "matches 0.1.4 (registry+https://github.com/rust-lang/crates.io-index)",
- "unicode-bidi 0.2.4 (registry+https://github.com/rust-lang/crates.io-index)",
- "unicode-normalization 0.1.3 (registry+https://github.com/rust-lang/crates.io-index)",
+ "unicode-bidi 0.2.5 (registry+https://github.com/rust-lang/crates.io-index)",
+ "unicode-normalization 0.1.4 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -248,20 +326,23 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "conduit-mime-types 0.7.3 (registry+https://github.com/rust-lang/crates.io-index)",
  "error 0.1.9 (registry+https://github.com/rust-lang/crates.io-index)",
- "hyper 0.9.14 (registry+https://github.com/rust-lang/crates.io-index)",
+ "hyper 0.9.18 (registry+https://github.com/rust-lang/crates.io-index)",
  "lazy_static 0.1.16 (registry+https://github.com/rust-lang/crates.io-index)",
- "log 0.3.6 (registry+https://github.com/rust-lang/crates.io-index)",
+ "log 0.3.7 (registry+https://github.com/rust-lang/crates.io-index)",
  "modifier 0.1.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "num_cpus 0.2.13 (registry+https://github.com/rust-lang/crates.io-index)",
  "plugin 0.2.6 (registry+https://github.com/rust-lang/crates.io-index)",
  "typemap 0.3.3 (registry+https://github.com/rust-lang/crates.io-index)",
- "url 1.2.4 (registry+https://github.com/rust-lang/crates.io-index)",
+ "url 1.4.0 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
 name = "itertools"
-version = "0.4.19"
+version = "0.5.10"
 source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "either 1.1.0 (registry+https://github.com/rust-lang/crates.io-index)",
+]
 
 [[package]]
 name = "itoa"
@@ -287,14 +368,19 @@ name = "lazy_static"
 version = "0.1.16"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
+[[package]]
+name = "lazy_static"
+version = "0.2.8"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+
 [[package]]
 name = "libc"
-version = "0.2.19"
+version = "0.2.21"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
 name = "log"
-version = "0.3.6"
+version = "0.3.7"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
@@ -302,8 +388,8 @@ name = "lz4"
 version = "1.20.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "gcc 0.3.41 (registry+https://github.com/rust-lang/crates.io-index)",
- "libc 0.2.19 (registry+https://github.com/rust-lang/crates.io-index)",
+ "gcc 0.3.45 (registry+https://github.com/rust-lang/crates.io-index)",
+ "libc 0.2.21 (registry+https://github.com/rust-lang/crates.io-index)",
  "lz4-sys 1.0.1+1.7.3 (registry+https://github.com/rust-lang/crates.io-index)",
  "skeptic 0.6.1 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
@@ -313,8 +399,8 @@ name = "lz4-sys"
 version = "1.0.1+1.7.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "gcc 0.3.41 (registry+https://github.com/rust-lang/crates.io-index)",
- "libc 0.2.19 (registry+https://github.com/rust-lang/crates.io-index)",
+ "gcc 0.3.45 (registry+https://github.com/rust-lang/crates.io-index)",
+ "libc 0.2.21 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -327,18 +413,15 @@ name = "memchr"
 version = "0.1.11"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "libc 0.2.19 (registry+https://github.com/rust-lang/crates.io-index)",
+ "libc 0.2.21 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
-name = "memmap"
-version = "0.2.3"
+name = "memchr"
+version = "1.0.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "fs2 0.2.5 (registry+https://github.com/rust-lang/crates.io-index)",
- "kernel32-sys 0.2.2 (registry+https://github.com/rust-lang/crates.io-index)",
- "libc 0.2.19 (registry+https://github.com/rust-lang/crates.io-index)",
- "winapi 0.2.8 (registry+https://github.com/rust-lang/crates.io-index)",
+ "libc 0.2.21 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -348,16 +431,16 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "fs2 0.2.5 (registry+https://github.com/rust-lang/crates.io-index)",
  "kernel32-sys 0.2.2 (registry+https://github.com/rust-lang/crates.io-index)",
- "libc 0.2.19 (registry+https://github.com/rust-lang/crates.io-index)",
+ "libc 0.2.21 (registry+https://github.com/rust-lang/crates.io-index)",
  "winapi 0.2.8 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
 name = "mime"
-version = "0.2.2"
+version = "0.2.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "log 0.3.6 (registry+https://github.com/rust-lang/crates.io-index)",
+ "log 0.3.7 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -374,70 +457,83 @@ dependencies = [
  "sequence_trie 0.0.13 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
+[[package]]
+name = "nix"
+version = "0.7.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "bitflags 0.4.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "cfg-if 0.1.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "libc 0.2.21 (registry+https://github.com/rust-lang/crates.io-index)",
+ "rustc_version 0.1.7 (registry+https://github.com/rust-lang/crates.io-index)",
+ "semver 0.1.20 (registry+https://github.com/rust-lang/crates.io-index)",
+ "void 1.0.2 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
 [[package]]
 name = "num"
-version = "0.1.36"
+version = "0.1.37"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "num-bigint 0.1.35 (registry+https://github.com/rust-lang/crates.io-index)",
- "num-complex 0.1.35 (registry+https://github.com/rust-lang/crates.io-index)",
- "num-integer 0.1.32 (registry+https://github.com/rust-lang/crates.io-index)",
- "num-iter 0.1.32 (registry+https://github.com/rust-lang/crates.io-index)",
- "num-rational 0.1.35 (registry+https://github.com/rust-lang/crates.io-index)",
- "num-traits 0.1.36 (registry+https://github.com/rust-lang/crates.io-index)",
+ "num-bigint 0.1.37 (registry+https://github.com/rust-lang/crates.io-index)",
+ "num-complex 0.1.37 (registry+https://github.com/rust-lang/crates.io-index)",
+ "num-integer 0.1.34 (registry+https://github.com/rust-lang/crates.io-index)",
+ "num-iter 0.1.33 (registry+https://github.com/rust-lang/crates.io-index)",
+ "num-rational 0.1.36 (registry+https://github.com/rust-lang/crates.io-index)",
+ "num-traits 0.1.37 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
 name = "num-bigint"
-version = "0.1.35"
+version = "0.1.37"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "num-integer 0.1.32 (registry+https://github.com/rust-lang/crates.io-index)",
- "num-traits 0.1.36 (registry+https://github.com/rust-lang/crates.io-index)",
+ "num-integer 0.1.34 (registry+https://github.com/rust-lang/crates.io-index)",
+ "num-traits 0.1.37 (registry+https://github.com/rust-lang/crates.io-index)",
  "rand 0.3.15 (registry+https://github.com/rust-lang/crates.io-index)",
- "rustc-serialize 0.3.22 (registry+https://github.com/rust-lang/crates.io-index)",
+ "rustc-serialize 0.3.24 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
 name = "num-complex"
-version = "0.1.35"
+version = "0.1.37"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "num-traits 0.1.36 (registry+https://github.com/rust-lang/crates.io-index)",
- "rustc-serialize 0.3.22 (registry+https://github.com/rust-lang/crates.io-index)",
+ "num-traits 0.1.37 (registry+https://github.com/rust-lang/crates.io-index)",
+ "rustc-serialize 0.3.24 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
 name = "num-integer"
-version = "0.1.32"
+version = "0.1.34"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "num-traits 0.1.36 (registry+https://github.com/rust-lang/crates.io-index)",
+ "num-traits 0.1.37 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
 name = "num-iter"
-version = "0.1.32"
+version = "0.1.33"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "num-integer 0.1.32 (registry+https://github.com/rust-lang/crates.io-index)",
- "num-traits 0.1.36 (registry+https://github.com/rust-lang/crates.io-index)",
+ "num-integer 0.1.34 (registry+https://github.com/rust-lang/crates.io-index)",
+ "num-traits 0.1.37 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
 name = "num-rational"
-version = "0.1.35"
+version = "0.1.36"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "num-bigint 0.1.35 (registry+https://github.com/rust-lang/crates.io-index)",
- "num-integer 0.1.32 (registry+https://github.com/rust-lang/crates.io-index)",
- "num-traits 0.1.36 (registry+https://github.com/rust-lang/crates.io-index)",
- "rustc-serialize 0.3.22 (registry+https://github.com/rust-lang/crates.io-index)",
+ "num-bigint 0.1.37 (registry+https://github.com/rust-lang/crates.io-index)",
+ "num-integer 0.1.34 (registry+https://github.com/rust-lang/crates.io-index)",
+ "num-traits 0.1.37 (registry+https://github.com/rust-lang/crates.io-index)",
+ "rustc-serialize 0.3.24 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
 name = "num-traits"
-version = "0.1.36"
+version = "0.1.37"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
@@ -445,15 +541,15 @@ name = "num_cpus"
 version = "0.2.13"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "libc 0.2.19 (registry+https://github.com/rust-lang/crates.io-index)",
+ "libc 0.2.21 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
 name = "num_cpus"
-version = "1.2.1"
+version = "1.3.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "libc 0.2.19 (registry+https://github.com/rust-lang/crates.io-index)",
+ "libc 0.2.21 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -486,9 +582,14 @@ name = "rand"
 version = "0.3.15"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "libc 0.2.19 (registry+https://github.com/rust-lang/crates.io-index)",
+ "libc 0.2.21 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
+[[package]]
+name = "redox_syscall"
+version = "0.1.17"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+
 [[package]]
 name = "regex"
 version = "0.1.80"
@@ -501,14 +602,31 @@ dependencies = [
  "utf8-ranges 0.1.3 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
+[[package]]
+name = "regex"
+version = "0.2.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "aho-corasick 0.6.3 (registry+https://github.com/rust-lang/crates.io-index)",
+ "memchr 1.0.1 (registry+https://github.com/rust-lang/crates.io-index)",
+ "regex-syntax 0.4.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "thread_local 0.3.3 (registry+https://github.com/rust-lang/crates.io-index)",
+ "utf8-ranges 1.0.0 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
 [[package]]
 name = "regex-syntax"
 version = "0.3.9"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
+[[package]]
+name = "regex-syntax"
+version = "0.4.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+
 [[package]]
 name = "rustc-serialize"
-version = "0.3.22"
+version = "0.3.24"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
@@ -534,23 +652,28 @@ name = "serde"
 version = "0.6.15"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "num 0.1.36 (registry+https://github.com/rust-lang/crates.io-index)",
+ "num 0.1.37 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
 name = "serde"
-version = "0.8.22"
+version = "0.7.15"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+
+[[package]]
+name = "serde"
+version = "0.8.23"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
 name = "serde_json"
-version = "0.8.4"
+version = "0.8.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "dtoa 0.2.2 (registry+https://github.com/rust-lang/crates.io-index)",
  "itoa 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)",
- "num-traits 0.1.36 (registry+https://github.com/rust-lang/crates.io-index)",
- "serde 0.8.22 (registry+https://github.com/rust-lang/crates.io-index)",
+ "num-traits 0.1.37 (registry+https://github.com/rust-lang/crates.io-index)",
+ "serde 0.8.23 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -568,7 +691,7 @@ version = "0.4.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "hpack 0.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "log 0.3.6 (registry+https://github.com/rust-lang/crates.io-index)",
+ "log 0.3.7 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -577,43 +700,48 @@ version = "0.3.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "iron 0.4.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "log 0.3.6 (registry+https://github.com/rust-lang/crates.io-index)",
+ "log 0.3.7 (registry+https://github.com/rust-lang/crates.io-index)",
  "mount 0.2.1 (registry+https://github.com/rust-lang/crates.io-index)",
- "time 0.1.35 (registry+https://github.com/rust-lang/crates.io-index)",
- "url 1.2.4 (registry+https://github.com/rust-lang/crates.io-index)",
+ "time 0.1.36 (registry+https://github.com/rust-lang/crates.io-index)",
+ "url 1.4.0 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
 name = "strsim"
-version = "0.5.2"
+version = "0.6.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
 name = "tantivy"
-version = "0.2.0"
+version = "0.3.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "atomicwrites 0.0.14 (registry+https://github.com/rust-lang/crates.io-index)",
- "bincode 0.4.1 (registry+https://github.com/rust-lang/crates.io-index)",
- "byteorder 0.4.2 (registry+https://github.com/rust-lang/crates.io-index)",
- "chan 0.1.18 (registry+https://github.com/rust-lang/crates.io-index)",
- "combine 2.0.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "atomicwrites 0.1.3 (registry+https://github.com/rust-lang/crates.io-index)",
+ "bincode 0.5.9 (registry+https://github.com/rust-lang/crates.io-index)",
+ "bit-set 0.4.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "byteorder 1.0.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "chan 0.1.19 (registry+https://github.com/rust-lang/crates.io-index)",
+ "combine 2.3.2 (registry+https://github.com/rust-lang/crates.io-index)",
  "crossbeam 0.2.10 (registry+https://github.com/rust-lang/crates.io-index)",
- "fst 0.1.35 (registry+https://github.com/rust-lang/crates.io-index)",
- "gcc 0.3.41 (registry+https://github.com/rust-lang/crates.io-index)",
- "itertools 0.4.19 (registry+https://github.com/rust-lang/crates.io-index)",
- "lazy_static 0.1.16 (registry+https://github.com/rust-lang/crates.io-index)",
- "libc 0.2.19 (registry+https://github.com/rust-lang/crates.io-index)",
- "log 0.3.6 (registry+https://github.com/rust-lang/crates.io-index)",
+ "fst 0.1.38 (registry+https://github.com/rust-lang/crates.io-index)",
+ "futures 0.1.13 (registry+https://github.com/rust-lang/crates.io-index)",
+ "futures-cpupool 0.1.5 (registry+https://github.com/rust-lang/crates.io-index)",
+ "gcc 0.3.45 (registry+https://github.com/rust-lang/crates.io-index)",
+ "itertools 0.5.10 (registry+https://github.com/rust-lang/crates.io-index)",
+ "lazy_static 0.2.8 (registry+https://github.com/rust-lang/crates.io-index)",
+ "libc 0.2.21 (registry+https://github.com/rust-lang/crates.io-index)",
+ "log 0.3.7 (registry+https://github.com/rust-lang/crates.io-index)",
  "lz4 1.20.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "memmap 0.2.3 (registry+https://github.com/rust-lang/crates.io-index)",
- "num_cpus 0.2.13 (registry+https://github.com/rust-lang/crates.io-index)",
- "regex 0.1.80 (registry+https://github.com/rust-lang/crates.io-index)",
- "rustc-serialize 0.3.22 (registry+https://github.com/rust-lang/crates.io-index)",
+ "memmap 0.4.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "num_cpus 1.3.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "regex 0.2.1 (registry+https://github.com/rust-lang/crates.io-index)",
+ "rustc-serialize 0.3.24 (registry+https://github.com/rust-lang/crates.io-index)",
  "tempdir 0.3.5 (registry+https://github.com/rust-lang/crates.io-index)",
- "tempfile 2.1.4 (registry+https://github.com/rust-lang/crates.io-index)",
- "time 0.1.35 (registry+https://github.com/rust-lang/crates.io-index)",
- "uuid 0.1.18 (registry+https://github.com/rust-lang/crates.io-index)",
+ "tempfile 2.1.5 (registry+https://github.com/rust-lang/crates.io-index)",
+ "time 0.1.36 (registry+https://github.com/rust-lang/crates.io-index)",
+ "uuid 0.4.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "version 2.0.1 (registry+https://github.com/rust-lang/crates.io-index)",
+ "winapi 0.2.8 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -626,11 +754,11 @@ dependencies = [
 
 [[package]]
 name = "tempfile"
-version = "2.1.4"
+version = "2.1.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "kernel32-sys 0.2.2 (registry+https://github.com/rust-lang/crates.io-index)",
- "libc 0.2.19 (registry+https://github.com/rust-lang/crates.io-index)",
+ "libc 0.2.21 (registry+https://github.com/rust-lang/crates.io-index)",
  "rand 0.3.15 (registry+https://github.com/rust-lang/crates.io-index)",
  "rustc_version 0.1.7 (registry+https://github.com/rust-lang/crates.io-index)",
  "winapi 0.2.8 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -638,11 +766,11 @@ dependencies = [
 
 [[package]]
 name = "term_size"
-version = "0.2.1"
+version = "0.3.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "kernel32-sys 0.2.2 (registry+https://github.com/rust-lang/crates.io-index)",
- "libc 0.2.19 (registry+https://github.com/rust-lang/crates.io-index)",
+ "libc 0.2.21 (registry+https://github.com/rust-lang/crates.io-index)",
  "winapi 0.2.8 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
@@ -652,7 +780,16 @@ version = "2.0.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "kernel32-sys 0.2.2 (registry+https://github.com/rust-lang/crates.io-index)",
- "libc 0.2.19 (registry+https://github.com/rust-lang/crates.io-index)",
+ "libc 0.2.21 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
+name = "thread-id"
+version = "3.0.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "kernel32-sys 0.2.2 (registry+https://github.com/rust-lang/crates.io-index)",
+ "libc 0.2.21 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -663,13 +800,23 @@ dependencies = [
  "thread-id 2.0.0 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
+[[package]]
+name = "thread_local"
+version = "0.3.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "thread-id 3.0.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "unreachable 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
 [[package]]
 name = "time"
-version = "0.1.35"
+version = "0.1.36"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "kernel32-sys 0.2.2 (registry+https://github.com/rust-lang/crates.io-index)",
- "libc 0.2.19 (registry+https://github.com/rust-lang/crates.io-index)",
+ "libc 0.2.21 (registry+https://github.com/rust-lang/crates.io-index)",
+ "redox_syscall 0.1.17 (registry+https://github.com/rust-lang/crates.io-index)",
  "winapi 0.2.8 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
@@ -680,7 +827,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
 name = "traitobject"
-version = "0.0.3"
+version = "0.1.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
@@ -706,7 +853,7 @@ dependencies = [
 
 [[package]]
 name = "unicode-bidi"
-version = "0.2.4"
+version = "0.2.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "matches 0.1.4 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -714,12 +861,12 @@ dependencies = [
 
 [[package]]
 name = "unicode-normalization"
-version = "0.1.3"
+version = "0.1.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
 name = "unicode-segmentation"
-version = "0.1.3"
+version = "1.1.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
@@ -727,20 +874,28 @@ name = "unicode-width"
 version = "0.1.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
+[[package]]
+name = "unreachable"
+version = "0.1.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "void 1.0.2 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
 [[package]]
 name = "unsafe-any"
 version = "0.4.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "traitobject 0.0.3 (registry+https://github.com/rust-lang/crates.io-index)",
+ "traitobject 0.1.0 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
 name = "url"
-version = "1.2.4"
+version = "1.4.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "idna 0.1.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "idna 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "matches 0.1.4 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
@@ -752,7 +907,7 @@ dependencies = [
  "bodyparser 0.4.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "iron 0.4.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "plugin 0.2.6 (registry+https://github.com/rust-lang/crates.io-index)",
- "url 1.2.4 (registry+https://github.com/rust-lang/crates.io-index)",
+ "url 1.4.0 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -760,18 +915,23 @@ name = "utf8-ranges"
 version = "0.1.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
+[[package]]
+name = "utf8-ranges"
+version = "1.0.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+
 [[package]]
 name = "uuid"
-version = "0.1.18"
+version = "0.4.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "rand 0.3.15 (registry+https://github.com/rust-lang/crates.io-index)",
- "rustc-serialize 0.3.22 (registry+https://github.com/rust-lang/crates.io-index)",
+ "rustc-serialize 0.3.24 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
 name = "vec_map"
-version = "0.6.0"
+version = "0.7.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
@@ -779,6 +939,11 @@ name = "version"
 version = "2.0.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
+[[package]]
+name = "void"
+version = "1.0.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+
 [[package]]
 name = "winapi"
 version = "0.2.8"
@@ -791,97 +956,119 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [metadata]
 "checksum aho-corasick 0.5.3 (registry+https://github.com/rust-lang/crates.io-index)" = "ca972c2ea5f742bfce5687b9aef75506a764f61d37f8f649047846a9686ddb66"
+"checksum aho-corasick 0.6.3 (registry+https://github.com/rust-lang/crates.io-index)" = "500909c4f87a9e52355b26626d890833e9e1d53ac566db76c36faa984b889699"
 "checksum ansi_term 0.8.0 (registry+https://github.com/rust-lang/crates.io-index)" = "c877397e09fec7a240af5fa74ad0124054b8066149d6544cd1ace93f8de3be68"
 "checksum ansi_term 0.9.0 (registry+https://github.com/rust-lang/crates.io-index)" = "23ac7c30002a5accbf7e8987d0632fa6de155b7c3d39d0067317a391e00a2ef6"
 "checksum ascii 0.7.1 (registry+https://github.com/rust-lang/crates.io-index)" = "3ae7d751998c189c1d4468cf0a39bb2eae052a9c58d50ebb3b9591ee3813ad50"
-"checksum atomicwrites 0.0.14 (registry+https://github.com/rust-lang/crates.io-index)" = "cb0c17968587e21d3fec90bd67dc2b7c956189a9e81ce4f8910172a787b66556"
+"checksum atomicwrites 0.1.3 (registry+https://github.com/rust-lang/crates.io-index)" = "c4328d3fa4af4aedc582587976a0f74decc73f90ea7cae3d757c0535f983d16f"
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diff --git a/Cargo.toml b/Cargo.toml
index 497d98d..2da5a32 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "tantivy-cli"
-version = "0.2.0"
+version = "0.3.0"
 authors = ["Paul Masurel <paul.masurel@gmail.com>"]
 
 description = """Command line interface for Tantivy, a search engine library."""
@@ -26,14 +26,10 @@ chan = "0.1"
 bincode = "0.4"
 byteorder = "0.5"
 log = "0.3"
+futures = "0.1"
 env_logger = "0.3"
 version = "2"
-
-
-[dependencies.tantivy]
-version = "0.2.0"
-features = []
-default-features = false
+tantivy = "0.3.0"
 
 [[bin]]
 name = "tantivy"
diff --git a/src/commands/index.rs b/src/commands/index.rs
index 3dcca40..78b0388 100644
--- a/src/commands/index.rs
+++ b/src/commands/index.rs
@@ -82,9 +82,12 @@ fn run_index(directory: PathBuf, document_source: DocumentSource, buffer_size_pe
 
 
     let index_result = index_documents(&mut index_writer, doc_receiver);
-    try!(match index_result {
+    match index_result {
         Ok(docstamp) => {
             println!("Commit succeed, docstamp at {}", docstamp);
+            println!("Waiting for merging threads");
+            index_writer.wait_merging_threads()?;
+            println!("Terminated successfully!");
             Ok(())
         }
         Err(e) => {
@@ -93,9 +96,7 @@ fn run_index(directory: PathBuf, document_source: DocumentSource, buffer_size_pe
             println!("Rollback succeeded");
             Err(e)
         }
-    });
-    
-    index_writer.wait_merging_threads()
+    }
 }
 
 fn index_documents(index_writer: &mut IndexWriter, doc_receiver: chan::Receiver<Document>) -> tantivy::Result<u64> {
@@ -103,7 +104,7 @@ fn index_documents(index_writer: &mut IndexWriter, doc_receiver: chan::Receiver<
     let mut num_docs = 0;
     let mut cur = PreciseTime::now();
     for doc in doc_receiver {
-        try!(index_writer.add_document(doc));
+        index_writer.add_document(doc);
         if num_docs > 0 && (num_docs % group_count == 0) {
             println!("{} Docs", num_docs);
             let new = PreciseTime::now();
diff --git a/src/commands/merge.rs b/src/commands/merge.rs
index 364cdc7..47da3c6 100644
--- a/src/commands/merge.rs
+++ b/src/commands/merge.rs
@@ -1,20 +1,31 @@
 extern crate tantivy;
 
-use tantivy::Index;
+use tantivy::{Index, SegmentMeta};
 use std::path::PathBuf;
 use clap::ArgMatches;
+use futures::Future;
 
 const HEAP_SIZE: usize = 300_000_000;
 
+
+fn error_msg(err: tantivy::Error) -> String {
+    format!("Merge failed : {:?}", err)
+}
+
 pub fn run_merge_cli(argmatch: &ArgMatches) -> Result<(), String> {
     let index_directory = PathBuf::from(argmatch.value_of("index").unwrap());
-    run_merge(index_directory).map_err(|e| format!("Indexing failed : {:?}", e))
+    let segment_meta = run_merge(index_directory).map_err(error_msg)?;
+    println!("Merge finished with segment meta {:?}", segment_meta);
+    Ok(())
 }
 
 
-fn run_merge(path: PathBuf) -> tantivy::Result<()> {
-    let index = try!(Index::open(&path));
-    let segments = index.searchable_segments();
-    let mut index_writer = try!(index.writer(HEAP_SIZE));
-    index_writer.merge(&segments)
+fn run_merge(path: PathBuf) -> tantivy::Result<SegmentMeta> {
+    let index = Index::open(&path)?;
+    let segments = index.searchable_segment_ids()?;
+    index
+        .writer(HEAP_SIZE)?
+        .merge(&segments)
+        .wait()
+        .map_err(|_| tantivy::Error::ErrorInThread(String::from("Merge got cancelled")))
 }
diff --git a/src/main.rs b/src/main.rs
index 5d751fb..9c20f7b 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -2,7 +2,6 @@
 extern crate clap;
 #[macro_use]
 extern crate version;
-#[macro_use]
 extern crate rustc_serialize;
 #[macro_use]
 extern crate log;
@@ -10,6 +9,7 @@ extern crate env_logger;
 extern crate tantivy;
 extern crate time;
 extern crate persistent;
+extern crate futures;
 extern crate urlencoded;
 extern crate iron;
 extern crate chan;