feat: when using --offline, pass that on to cargo

src/config/rt.rs

@@ -35,7 +35,7 @@ pub struct RtcBuild {
     pub target_parent: PathBuf,
     /// Build in release mode.
     pub release: bool,
-    /// Build without downloading tools
+    /// Build without network access
     pub offline: bool,
     /// The public URL from which assets are to be served.
     pub public_url: String,

src/pipelines/rust.rs

@@ -242,6 +242,9 @@ impl RustApp {
         if self.cfg.release {
             args.push("--release");
         }
+        if self.cfg.offline {
+            args.push("--offline");
+        }
         if let Some(bin) = &self.bin {
             args.push("--bin");
             args.push(bin);