From 1d8b4e75b0fb12125d294b8231f170c9603d2de6 Mon Sep 17 00:00:00 2001
From: Laura Loghin <lauralg@amazon.com>
Date: Fri, 27 Nov 2020 18:39:03 +0200
Subject: [PATCH] hide StdIoBackend behind backend-stdio feature

Signed-off-by: Laura Loghin <lauralg@amazon.com>
---
 Cargo.toml                   | 3 +++
 coverage_config_aarch64.json | 2 +-
 coverage_config_x86_64.json  | 2 +-
 src/block/mod.rs             | 5 ++++-
 src/lib.rs                   | 7 +++----
 5 files changed, 12 insertions(+), 7 deletions(-)

diff --git a/Cargo.toml b/Cargo.toml
index 587ab07c..10c113bf 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -9,6 +9,9 @@ readme = "README.md"
 license = "Apache-2.0 OR MIT"
 edition = "2018"
 
+[features]
+backend-stdio = []
+
 [dependencies]
 byteorder = ">=1.2.1"
 libc = ">=0.2.39"
diff --git a/coverage_config_aarch64.json b/coverage_config_aarch64.json
index 4361d9e8..23f52a39 100644
--- a/coverage_config_aarch64.json
+++ b/coverage_config_aarch64.json
@@ -1,5 +1,5 @@
 {
   "coverage_score": 85.6,
   "exclude_path": "",
-  "crate_features": ""
+  "crate_features": "backend-stdio"
 }
diff --git a/coverage_config_x86_64.json b/coverage_config_x86_64.json
index 7abd6c69..82e90d86 100644
--- a/coverage_config_x86_64.json
+++ b/coverage_config_x86_64.json
@@ -1,5 +1,5 @@
 {
   "coverage_score": 87.7,
   "exclude_path": "",
-  "crate_features": ""
+  "crate_features": "backend-stdio"
 }
diff --git a/src/block/mod.rs b/src/block/mod.rs
index 0bed4754..3123f739 100644
--- a/src/block/mod.rs
+++ b/src/block/mod.rs
@@ -4,5 +4,8 @@
 
 /// Contains block request parsing abstraction.
 pub mod request;
-/// Contains block request execution abstraction.
+/// Contains a block request execution abstraction that is based on
+/// [`std::io::Read`](https://doc.rust-lang.org/std/io/trait.Read.html)
+/// and [`std::io::Write`](https://doc.rust-lang.org/std/io/trait.Write.html).
+#[cfg(feature = "backend-stdio")]
 pub mod stdio_executor;
diff --git a/src/lib.rs b/src/lib.rs
index c23dee19..dc200fec 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -19,10 +19,9 @@ pub mod block;
 mod device;
 mod queue;
 
-pub use self::block::{
-    request::Request as BlockRequest, request::RequestType as BlockRequestType,
-    stdio_executor::StdIoBackend,
-};
+#[cfg(feature = "backend-stdio")]
+pub use self::block::stdio_executor::StdIoBackend;
+pub use self::block::{request::Request as BlockRequest, request::RequestType as BlockRequestType};
 pub use self::device::*;
 pub use self::queue::*;