Default to using getrandom.

Author: rkistner

crates/core/Cargo.toml

@@ -30,6 +30,8 @@ features = []
 
 
 [features]
+default = ["getrandom"]
+
 loadable_extension = ["sqlite_nostd/loadable_extension"]
 static = ["sqlite_nostd/static"]
 omit_load_extension = ["sqlite_nostd/omit_load_extension"]

crates/core/src/util.rs

@@ -85,7 +85,8 @@ pub fn deserialize_optional_string_to_i64<'de, D>(deserializer: D) -> Result<Opt
     }
 }
 
-// Use getrandom crate to generate UUID
+// Use getrandom crate to generate UUID.
+// This is not available in all WASM builds - use the default in those cases.
 #[cfg(feature = "getrandom")]
 pub fn gen_uuid() -> Uuid {
     let id = Uuid::new_v4();
@@ -95,7 +96,7 @@ pub fn gen_uuid() -> Uuid {
 // Default - use sqlite3_randomness to generate UUID
 // This uses ChaCha20 PRNG, with /dev/urandom as a seed on unix.
 // On Windows, it uses custom logic for the seed, which may not be secure.
-// Rather avoid this version for Windows builds.
+// Rather avoid this version for most builds.
 #[cfg(not(feature = "getrandom"))]
 pub fn gen_uuid() -> Uuid {
     let mut random_bytes: [u8; 16] = [0; 16];

crates/shell/Cargo.toml

@@ -13,7 +13,7 @@ powersync_core = { path="../core" }
 sqlite_nostd = { workspace=true }
 
 [features]
-default = ["powersync_core/static", "powersync_core/omit_load_extension", "powersync_core/getrandom", "sqlite_nostd/static", "sqlite_nostd/omit_load_extension"]
+default = ["powersync_core/static", "powersync_core/omit_load_extension", "sqlite_nostd/static", "sqlite_nostd/omit_load_extension"]
 
 [build-dependencies]
 cc = "1.0.46"