From 687b2cf99714073f83855464d6df04baf540ecc5 Mon Sep 17 00:00:00 2001
From: Grisha Kruglov <gkruglov@mozilla.com>
Date: Wed, 27 Jun 2018 19:59:19 -0400
Subject: [PATCH] Add 'syncable' feature to 'db' crate to conditionally derive
 serialization for Partition*

This is leading up syncing with partition support.
---
 Cargo.toml      | 2 +-
 db/Cargo.toml   | 4 ++++
 db/src/lib.rs   | 3 +++
 db/src/types.rs | 1 +
 4 files changed, 9 insertions(+), 1 deletion(-)

diff --git a/Cargo.toml b/Cargo.toml
index d6b0534b..f408a849 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -19,7 +19,7 @@ build = "build/version.rs"
 default = ["bundled_sqlite3", "syncable"]
 bundled_sqlite3 = ["rusqlite/bundled"]
 sqlcipher = ["rusqlite/sqlcipher", "mentat_db/sqlcipher"]
-syncable = ["mentat_tolstoy"]
+syncable = ["mentat_tolstoy", "mentat_db/syncable"]
 
 [workspace]
 members = ["tools/cli", "ffi"]
diff --git a/db/Cargo.toml b/db/Cargo.toml
index f89121b7..3cb74d58 100644
--- a/db/Cargo.toml
+++ b/db/Cargo.toml
@@ -6,6 +6,7 @@ workspace = ".."
 [features]
 default = []
 sqlcipher = ["rusqlite/sqlcipher"]
+syncable = ["serde", "serde_json", "serde_derive"]
 
 [dependencies]
 failure = "0.1.1"
@@ -17,6 +18,9 @@ log = "0.4"
 ordered-float = "0.5"
 time = "0.1"
 petgraph = "0.4.12"
+serde = { version = "1.0", optional = true }
+serde_json = { version = "1.0", optional = true }
+serde_derive = { version = "1.0", optional = true }
 
 [dependencies.rusqlite]
 version = "0.13"
diff --git a/db/src/lib.rs b/db/src/lib.rs
index c42b8eaf..f88aabf5 100644
--- a/db/src/lib.rs
+++ b/db/src/lib.rs
@@ -15,6 +15,9 @@ extern crate itertools;
 #[macro_use] extern crate lazy_static;
 #[macro_use] extern crate log;
 
+#[cfg(feature = "syncable")]
+#[macro_use] extern crate serde_derive;
+
 extern crate petgraph;
 extern crate rusqlite;
 extern crate tabwriter;
diff --git a/db/src/types.rs b/db/src/types.rs
index f9404365..8d951e54 100644
--- a/db/src/types.rs
+++ b/db/src/types.rs
@@ -38,6 +38,7 @@ use errors;
 
 /// Represents one partition of the entid space.
 #[derive(Clone,Debug,Eq,Hash,Ord,PartialOrd,PartialEq)]
+#[cfg_attr(feature = "syncable", derive(Serialize,Deserialize))]
 pub struct Partition {
     /// The first entid in the partition.
     pub start: i64,