From ba523999d52e4a70cf76d34e62405ac45d449c9f Mon Sep 17 00:00:00 2001
From: Folyd <lyshuhow@gmail.com>
Date: Thu, 27 Feb 2020 17:12:21 +0800
Subject: [PATCH] Split dependencies with feature flags

---
 rust/Cargo.lock              |  1 -
 rust/Cargo.toml              | 24 +++++++++++++++---------
 rust/src/bin/books-index.rs  |  2 ++
 rust/src/bin/crates-index.rs |  2 ++
 4 files changed, 19 insertions(+), 10 deletions(-)

diff --git a/rust/Cargo.lock b/rust/Cargo.lock
index e061f01..89bae37 100644
--- a/rust/Cargo.lock
+++ b/rust/Cargo.lock
@@ -963,7 +963,6 @@ version = "0.1.0"
 dependencies = [
  "csv 1.1.3 (registry+https://github.com/rust-lang/crates.io-index)",
  "futures 0.3.1 (registry+https://github.com/rust-lang/crates.io-index)",
- "lazy_static 1.4.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "libflate 0.1.27 (registry+https://github.com/rust-lang/crates.io-index)",
  "minifier 0.0.33 (registry+https://github.com/rust-lang/crates.io-index)",
  "reqwest 0.10.0 (registry+https://github.com/rust-lang/crates.io-index)",
diff --git a/rust/Cargo.toml b/rust/Cargo.toml
index 049602d..3f42372 100644
--- a/rust/Cargo.toml
+++ b/rust/Cargo.toml
@@ -4,18 +4,24 @@ version = "0.1.0"
 authors = ["Folyd <lyshuhow@gmail.com>"]
 edition = "2018"
 
+[features]
+crates-index = ["csv","semver","tar","libflate"]
+books-index = ["futures","tokio","reqwest","select"]
+default = ["crates-index"]
+
 [dependencies]
 serde = "1.0.102"
-tokio = { version="0.2", features=["macros", "time"] }
-reqwest = { version="0.10" , features=["json"] }
 serde_json = "1.0.41"
 serde_derive = "1.0.102"
-futures = "0.3.1"
 minifier = "0.0.33"
-lazy_static = "1.4.0"
 unicode-segmentation = "1.6.0"
-select = "0.4.3"
-csv = "1.1.3"
-semver = { version="0.9.0", features=["ci"] }
-tar = "0.4.26"
-libflate = "0.1.27"
+# books-index
+futures = { version = "0.3.1", optional=true }
+tokio = { version="0.2", features=["macros", "time"], optional=true }
+reqwest = { version="0.10" , features=["json"], optional=true }
+select = { version= "0.4.3", optional=true }
+# crates-index
+csv = { version = "1.1.3", optional=true }
+semver = { version="0.9.0", features=["ci"], optional=true }
+tar = { version = "0.4.26", optional=true }
+libflate = { version="0.1.27", optional=true }
diff --git a/rust/src/bin/books-index.rs b/rust/src/bin/books-index.rs
index 333cb0f..b3f38c3 100644
--- a/rust/src/bin/books-index.rs
+++ b/rust/src/bin/books-index.rs
@@ -1,3 +1,5 @@
+#![cfg(feature = "books-index")]
+
 use std::fs;
 use std::path::Path;
 
diff --git a/rust/src/bin/crates-index.rs b/rust/src/bin/crates-index.rs
index 74951f2..bb25065 100644
--- a/rust/src/bin/crates-index.rs
+++ b/rust/src/bin/crates-index.rs
@@ -1,3 +1,5 @@
+#![cfg(feature = "crates-index")]
+
 use std::collections::HashMap;
 use std::collections::HashSet;
 use std::env;