From a98f5e7e258a30779aad4d37473c167257b2ac7b Mon Sep 17 00:00:00 2001
From: Yan Li <eyeplum@gmail.com>
Date: Mon, 4 Mar 2019 22:02:51 +1300
Subject: [PATCH] [ucd/unihan] Make unic-ucd-unihan an optional feature

The feature is named "unihan" and a user needs to opt-in explicitly to use it
---
 unic/Cargo.toml     |  1 +
 unic/ucd/Cargo.toml |  6 +++++-
 unic/ucd/src/lib.rs | 10 +++++++---
 3 files changed, 13 insertions(+), 4 deletions(-)

diff --git a/unic/Cargo.toml b/unic/Cargo.toml
index 05646162..080d203c 100644
--- a/unic/Cargo.toml
+++ b/unic/Cargo.toml
@@ -18,6 +18,7 @@ default = []
 unstable = ["unic-common/unstable"]  # Rust nightly features
 bench_it = ["unic-bidi/bench_it"]
 serde = ["unic-bidi/serde"]
+unihan = ["unic-ucd/unihan"]
 
 [dependencies]
 unic-bidi = { path = "bidi/", version = "0.9.0" }
diff --git a/unic/ucd/Cargo.toml b/unic/ucd/Cargo.toml
index 5dc0e197..9b834a5b 100644
--- a/unic/ucd/Cargo.toml
+++ b/unic/ucd/Cargo.toml
@@ -13,6 +13,10 @@ readme = "README.md"
 # No tests/benches that depends on /data/
 exclude = []
 
+[features]
+default = []
+unihan = ["unic-ucd-unihan"]
+
 [dependencies]
 unic-ucd-age = { path = "age/", version = "0.9.0" }
 unic-ucd-bidi = { path = "bidi/", version = "0.9.0" }
@@ -26,7 +30,7 @@ unic-ucd-name = { path = "name/", version = "0.9.0" }
 unic-ucd-name_aliases = { path = "name_aliases/", version = "0.9.0" }
 unic-ucd-normal = { path = "normal/", version = "0.9.0", features = ["unic-ucd-category"] }
 unic-ucd-segment = { path = "segment/", version = "0.9.0" }
-unic-ucd-unihan = { path = "unihan/", version = "0.9.0" }
+unic-ucd-unihan = { path = "unihan/", version = "0.9.0", optional = true }
 unic-ucd-version = { path = "version/", version = "0.9.0" }
 
 [dev-dependencies]
diff --git a/unic/ucd/src/lib.rs b/unic/ucd/src/lib.rs
index beca8a20..659b31fc 100644
--- a/unic/ucd/src/lib.rs
+++ b/unic/ucd/src/lib.rs
@@ -38,7 +38,6 @@ pub use unic_ucd_name as name;
 pub use unic_ucd_name_aliases as name_aliases;
 pub use unic_ucd_normal as normal;
 pub use unic_ucd_segment as segment;
-pub use unic_ucd_unihan as unihan;
 
 pub use crate::version::UnicodeVersion;
 
@@ -84,7 +83,12 @@ pub use crate::name_aliases::{name_aliases_of, NameAliasType};
 
 pub use crate::segment::{GraphemeClusterBreak, SentenceBreak, WordBreak};
 
-pub use crate::unihan::{definition_of, mandarin_of, simplified_variant_of, traditional_variant_of};
-
 mod pkg_info;
 pub use crate::pkg_info::{PKG_DESCRIPTION, PKG_NAME, PKG_VERSION};
+
+#[cfg(feature = "unihan")]
+pub use unic_ucd_unihan as unihan;
+
+#[cfg(feature = "unihan")]
+pub use crate::unihan::{definition_of, mandarin_of, simplified_variant_of, traditional_variant_of};
+