Run msrv check for all crates (open-telemetry#1826)

.github/workflows/ci.yml

@@ -110,10 +110,8 @@ jobs:
     - uses: dtolnay/rust-toolchain@1.65.0
     - name: Patch dependencies versions # some dependencies bump MSRV without major version bump
       run: bash ./scripts/patch_dependencies.sh
-    - name: Run tests
-      run: cargo --version &&
-        cargo test --manifest-path=opentelemetry/Cargo.toml --features trace,metrics,testing &&
-        cargo test --manifest-path=opentelemetry-zipkin/Cargo.toml
+    - name: Check MSRV for all crates
+      run: bash ./scripts/msrv.sh
   cargo-deny:
     runs-on: ubuntu-latest # This uses the step `EmbarkStudios/cargo-deny-action@v1` which is only supported on Linux
     continue-on-error: true # Prevent sudden announcement of a new advisory from failing ci

scripts/msrv.sh

@@ -0,0 +1,33 @@
+#!/bin/bash
+
+set -eu
+
+echo "Running msrv check for opentelemetry package"
+cargo check --manifest-path=opentelemetry/Cargo.toml --all-features
+
+echo "Running msrv check for opentelemetry-sdk package"
+cargo check --manifest-path=opentelemetry-sdk/Cargo.toml --all-features
+
+echo "Running msrv check for opentelemetry-stdout package"
+cargo check --manifest-path=opentelemetry-stdout/Cargo.toml --all-features
+
+# TODO: Ignoring as this is failing with the following error:
+# error: package `prost-derive v0.12.6` cannot be built because it requires rustc 1.70 or newer, while the currently active rustc version is 1.65.0
+#echo "Running msrv check for opentelemetry-otlp package"
+# cargo check --manifest-path=opentelemetry-otlp/Cargo.toml --all-features
+
+echo "Running msrv check for opentelemetry-http package"
+cargo check --manifest-path=opentelemetry-http/Cargo.toml --all-features
+
+echo "Running msrv check for opentelemetry-jaeger-propagator package"
+cargo check --manifest-path=opentelemetry-jaeger-propagator/Cargo.toml --all-features
+
+echo "Running msrv check for opentelemetry-zipkin package"
+cargo check --manifest-path=opentelemetry-zipkin/Cargo.toml --all-features
+
+echo "Running msrv check for opentelemetry-appender-log package"
+cargo check --manifest-path=opentelemetry-appender-log/Cargo.toml --all-features
+
+echo "Running msrv check for opentelemetry-appender-tracing package"
+cargo check --manifest-path=opentelemetry-appender-tracing/Cargo.toml --all-features
+