add opentelementry 0.20 support (#101)

.github/workflows/ci.yml

@@ -19,6 +19,7 @@ jobs:
           - opentelemetry_0_17
           - opentelemetry_0_18
           - opentelemetry_0_19
+          - opentelemetry_0_20
     steps:
       - name: Checkout repository
         uses: actions/checkout@v2
@@ -46,6 +47,7 @@ jobs:
           - opentelemetry_0_17
           - opentelemetry_0_18
           - opentelemetry_0_19
+          - opentelemetry_0_20
     steps:
       - name: Checkout repository
         uses: actions/checkout@v2
@@ -93,6 +95,7 @@ jobs:
           - opentelemetry_0_17
           - opentelemetry_0_18
           - opentelemetry_0_19
+          - opentelemetry_0_20
     steps:
       - name: Checkout repository
         uses: actions/checkout@v2
@@ -122,6 +125,7 @@ jobs:
           - opentelemetry_0_17
           - opentelemetry_0_18
           - opentelemetry_0_19
+          - opentelemetry_0_20
     steps:
       - name: Checkout repository
         uses: actions/checkout@v2

reqwest-tracing/Cargo.toml

@@ -17,6 +17,7 @@ opentelemetry_0_16 = ["opentelemetry_0_16_pkg", "tracing-opentelemetry_0_16_pkg"
 opentelemetry_0_17 = ["opentelemetry_0_17_pkg", "tracing-opentelemetry_0_17_pkg"]
 opentelemetry_0_18 = ["opentelemetry_0_18_pkg", "tracing-opentelemetry_0_18_pkg"]
 opentelemetry_0_19 = ["opentelemetry_0_19_pkg", "tracing-opentelemetry_0_19_pkg"]
+opentelemetry_0_20 = ["opentelemetry_0_20_pkg", "tracing-opentelemetry_0_20_pkg"]
 
 
 [dependencies]
@@ -36,13 +37,15 @@ opentelemetry_0_16_pkg = { package = "opentelemetry", version = "0.16.0", option
 opentelemetry_0_17_pkg = { package = "opentelemetry", version = "0.17.0", optional = true }
 opentelemetry_0_18_pkg = { package = "opentelemetry", version = "0.18.0", optional = true }
 opentelemetry_0_19_pkg = { package = "opentelemetry", version = "0.19.0", optional = true }
+opentelemetry_0_20_pkg = { package = "opentelemetry", version = "0.20.0", optional = true }
 tracing-opentelemetry_0_12_pkg = { package = "tracing-opentelemetry",version = "0.12.0", optional = true }
 tracing-opentelemetry_0_13_pkg = { package = "tracing-opentelemetry", version = "0.13.0", optional = true }
 tracing-opentelemetry_0_14_pkg = { package = "tracing-opentelemetry",version = "0.14.0", optional = true }
 tracing-opentelemetry_0_16_pkg = { package = "tracing-opentelemetry",version = "0.16.0", optional = true }
 tracing-opentelemetry_0_17_pkg = { package = "tracing-opentelemetry",version = "0.17.0", optional = true }
 tracing-opentelemetry_0_18_pkg = { package = "tracing-opentelemetry",version = "0.18.0", optional = true }
 tracing-opentelemetry_0_19_pkg = { package = "tracing-opentelemetry",version = "0.19.0", optional = true }
+tracing-opentelemetry_0_20_pkg = { package = "tracing-opentelemetry",version = "0.20.0", optional = true }
 
 [target.'cfg(target_arch = "wasm32")'.dependencies]
 getrandom = { version = "0.2.0", features = ["js"] }
@@ -52,3 +55,5 @@ tokio = { version = "1.0.0", features = ["macros"] }
 tracing_subscriber_0_2 = { package = "tracing-subscriber", version = "0.2.0" }
 tracing_subscriber_0_3 = { package = "tracing-subscriber", version = "0.3.0" }
 wiremock = "0.5.0"
+
+opentelemetry-stdout = { version = "0.1.0", features = ["trace"] }

reqwest-tracing/src/lib.rs

@@ -91,6 +91,7 @@ mod middleware;
     feature = "opentelemetry_0_17",
     feature = "opentelemetry_0_18",
     feature = "opentelemetry_0_19",
+    feature = "opentelemetry_0_20",
 ))]
 mod otel;
 mod reqwest_otel_span_builder;

reqwest-tracing/src/middleware.rs

@@ -53,6 +53,7 @@ where
                 feature = "opentelemetry_0_17",
                 feature = "opentelemetry_0_18",
                 feature = "opentelemetry_0_19",
+                feature = "opentelemetry_0_20",
             ))]
             let req = if !extensions.contains::<crate::DisableOtelPropagation>() {
                 // Adds tracing headers to the given request to propagate the OpenTelemetry context to downstream revivers of the request.

reqwest-tracing/src/otel.rs

@@ -24,6 +24,9 @@ use opentelemetry_0_18_pkg as opentelemetry;
 #[cfg(feature = "opentelemetry_0_19")]
 use opentelemetry_0_19_pkg as opentelemetry;
 
+#[cfg(feature = "opentelemetry_0_20")]
+use opentelemetry_0_20_pkg as opentelemetry;
+
 #[cfg(feature = "opentelemetry_0_13")]
 pub use tracing_opentelemetry_0_12_pkg as tracing_opentelemetry;
 
@@ -45,6 +48,9 @@ pub use tracing_opentelemetry_0_18_pkg as tracing_opentelemetry;
 #[cfg(feature = "opentelemetry_0_19")]
 pub use tracing_opentelemetry_0_19_pkg as tracing_opentelemetry;
 
+#[cfg(feature = "opentelemetry_0_20")]
+pub use tracing_opentelemetry_0_20_pkg as tracing_opentelemetry;
+
 use opentelemetry::global;
 use opentelemetry::propagation::Injector;
 use tracing_opentelemetry::OpenTelemetrySpanExt;
@@ -112,9 +118,23 @@ mod test {
         static TELEMETRY: OnceLock<()> = OnceLock::new();
 
         TELEMETRY.get_or_init(|| {
+            #[cfg(not(feature = "opentelemetry_0_20"))]
             let tracer = opentelemetry::sdk::export::trace::stdout::new_pipeline()
                 .with_writer(std::io::sink())
                 .install_simple();
+            #[cfg(feature = "opentelemetry_0_20")]
+            let tracer = {
+                use opentelemetry::trace::TracerProvider;
+                let exporter = opentelemetry_stdout::SpanExporterBuilder::default()
+                    .with_writer(std::io::sink())
+                    .build();
+                let provider = opentelemetry::sdk::trace::TracerProvider::builder()
+                    .with_simple_exporter(exporter)
+                    .build();
+                let tracer = provider.versioned_tracer("reqwest", None::<&str>, None::<&str>, None);
+                let _ = global::set_tracer_provider(provider);
+                tracer
+            };
             let telemetry = tracing_opentelemetry::layer().with_tracer(tracer);
             let subscriber = Registry::default()
                 .with(