From a76169042fa7ee5a8aa8fdb6151cf2d84a69eea8 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Cl=C3=A9ment=20Renault?= <renault.cle@gmail.com>
Date: Sun, 17 Nov 2019 12:30:39 +0100
Subject: [PATCH] Make the serde and zerocopy meilidb-types dependencies
 optional

---
 meilidb-types/Cargo.toml | 14 +++++++++++---
 meilidb-types/src/lib.rs | 25 +++++++++----------------
 2 files changed, 20 insertions(+), 19 deletions(-)

diff --git a/meilidb-types/Cargo.toml b/meilidb-types/Cargo.toml
index 67764d3c5..a18d42391 100644
--- a/meilidb-types/Cargo.toml
+++ b/meilidb-types/Cargo.toml
@@ -4,6 +4,14 @@ version = "0.1.0"
 authors = ["Clément Renault <renault.cle@gmail.com>"]
 edition = "2018"
 
-[dependencies]
-serde = { version = "1.0.101", features = ["derive"] }
-zerocopy = "0.2.8"
+[dependencies.zerocopy]
+version = "0.2.8"
+optional = true
+
+[dependencies.serde]
+version = "1.0.101"
+features = ["derive"]
+optional = true
+
+[features]
+default = ["serde", "zerocopy"]
diff --git a/meilidb-types/src/lib.rs b/meilidb-types/src/lib.rs
index 9a4b9e978..c02281a5f 100644
--- a/meilidb-types/src/lib.rs
+++ b/meilidb-types/src/lib.rs
@@ -1,24 +1,16 @@
-use serde::{Deserialize, Serialize};
+#[cfg(feature = "zerocopy")]
 use zerocopy::{AsBytes, FromBytes};
 
+#[cfg(feature = "serde")]
+use serde::{Deserialize, Serialize};
+
 /// Represent an internally generated document unique identifier.
 ///
 /// It is used to inform the database the document you want to deserialize.
 /// Helpful for custom ranking.
-#[derive(
-    Debug,
-    Copy,
-    Clone,
-    Eq,
-    PartialEq,
-    PartialOrd,
-    Ord,
-    Hash,
-    Serialize,
-    Deserialize,
-    AsBytes,
-    FromBytes,
-)]
+#[derive(Debug, Copy, Clone, Eq, PartialEq, PartialOrd, Ord, Hash)]
+#[cfg_attr(feature = "zerocopy", derive(AsBytes, FromBytes))]
+#[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
 #[repr(C)]
 pub struct DocumentId(pub u64);
 
@@ -27,7 +19,8 @@ pub struct DocumentId(pub u64);
 ///
 /// This is stored in the map, generated at index time,
 /// extracted and interpreted at search time.
-#[derive(Debug, Copy, Clone, PartialEq, Eq, PartialOrd, Ord, Hash, AsBytes, FromBytes)]
+#[derive(Debug, Copy, Clone, PartialEq, Eq, PartialOrd, Ord, Hash)]
+#[cfg_attr(feature = "zerocopy", derive(AsBytes, FromBytes))]
 #[repr(C)]
 pub struct DocIndex {
     /// The document identifier where the word was found.