Put extensions behind a feature flag

Cargo.toml

@@ -32,6 +32,7 @@ keywords = ["database"]
 [features]
 default = ["linkage"]
 bundled = ["sqlite3-sys/bundled"]
+extension = []
 linkage = ["sqlite3-sys/linkage"]
 
 [dependencies]

src/connection.rs

@@ -183,6 +183,7 @@ impl Connection {
     }
 
     /// Enable loading extensions.
+    #[cfg(feature = "extension")]
     #[inline]
     pub fn enable_extension(&self) -> Result<()> {
         unsafe {
@@ -195,6 +196,7 @@ impl Connection {
     }
 
     /// Disable loading extensions.
+    #[cfg(feature = "extension")]
     #[inline]
     pub fn disable_extension(&self) -> Result<()> {
         unsafe {
@@ -207,6 +209,7 @@ impl Connection {
     }
 
     /// Load an extension.
+    #[cfg(feature = "extension")]
     #[inline]
     pub fn load_extension<T: AsRef<str>>(&self, name: T) -> Result<()> {
         unsafe {

tests/connection.rs

@@ -114,18 +114,21 @@ fn set_busy_handler() {
     }
 }
 
+#[cfg(feature = "extension")]
 #[test]
 fn enable_extension() {
     let connection = ok!(Connection::open(":memory:"));
     ok!(connection.enable_extension());
 }
 
+#[cfg(feature = "extension")]
 #[test]
 fn disable_extension() {
     let connection = ok!(Connection::open(":memory:"));
     ok!(connection.disable_extension());
 }
 
+#[cfg(feature = "extension")]
 #[test]
 fn load_extension() {
     let connection = ok!(Connection::open(":memory:"));