Use Cargo features

.travis.yml

@@ -1,3 +1,26 @@
 language: rust
 
 rust: [stable, beta, nightly]
+
+env:
+  - FEATURES=''
+  - FEATURES='--no-default-features'
+
+install: cargo build --verbose $FEATURES
+
+script: cargo test --verbose $FEATURES
+
+jobs:
+  include:
+    - rust: stable
+      env: FEATURES=''
+    - rust: beta
+      env: FEATURES=''
+    - rust: nightly
+      env: FEATURES=''
+    - rust: stable
+      env: FEATURES='--no-default-features'
+    - rust: beta
+      env: FEATURES='--no-default-features'
+    - rust: nightly
+      env: FEATURES='--no-default-features'

Cargo.toml

@@ -12,9 +12,13 @@ keywords = ["api", "deserialization", "json", "serialization", "jsonapi"]
 categories = ["web-programming"]
 publish = true
 
+[features]
+default = ["client"]
+client = ["reqwest", "url"]
+
 [dependencies]
 regex = "1.5.4"
-reqwest = { version = "0.11.4", features = ["blocking", "json"] }
+reqwest = { version = "0.11.4", optional = true, features = ["blocking", "json"] }
 serde = { version = "1.0.129", features = ["derive"] }
 serde_json = "1.0.66"
-url = "2.2.2"
+url = { version = "2.2.2", optional = true }

src/lib.rs

@@ -1,7 +1,9 @@
 mod builders;
+#[cfg(client)]
 mod client;
 mod entities;
 
 pub use builders::*;
+#[cfg(client)]
 pub use client::*;
 pub use entities::*;