add missing feature gates

jsonld/Cargo.toml

@@ -15,7 +15,7 @@ keywords.workspace = true
 [features]
 default = []
 # This feature enables retrieval of context via file: URLs
-file_url = []
+file_url = ["dep:url"]
 # This feature enables retrieval of context over HTTP(S)
 http_client = ["json-ld/reqwest"]
 
@@ -32,7 +32,7 @@ sophia_iri.workspace = true
 sophia_term.workspace = true
 thiserror.workspace = true
 tokio.workspace = true
-url.workspace = true
+url = { workspace = true, optional = true }
 
 [dev-dependencies]
 sophia_turtle.workspace = true

jsonld/src/parser/test.rs

@@ -77,6 +77,7 @@ fn check_http_loader() {
     assert_eq!(got, exp);
 }
 
+#[cfg(feature = "file_url")]
 // Check whether JsonLdParser<FileUrlLoader> correctly implements QuadParser
 // (i.e. it has the correct trait bounds).
 // NB: the goal is NOT to check the loader itself -- we actually don't use it.

resource/src/loader/_trait.rs

@@ -1,5 +1,6 @@
 use super::{util::*, *};
 use crate::{Resource, ResourceError, TypedResource};
+#[cfg(feature = "jsonld")]
 use futures_util::FutureExt;
 use sophia_api::graph::CollectibleGraph;
 use sophia_api::parser::TripleParser;