ci: check for public dependencies

Author: mladedav

.cargo/config.toml

@@ -0,0 +1,3 @@
+# https://rust-lang.github.io/rfcs/3516-public-private-dependencies.html
+[unstable]
+public-dependency = true

.github/workflows/ci.yaml

@@ -24,6 +24,11 @@ jobs:
     - uses: Swatinem/rust-cache@v2
     - name: Check
       run: cargo +beta clippy --workspace --all-targets --all-features -- -D warnings
+    # This check is run for cargo public dependencies
+    - name: Check nightly
+      env:
+        RUSTFLAGS: "-D warnings"
+      run: cargo +nightly check --workspace --lib --all-features
     - name: rustfmt
       run: cargo +nightly fmt --all --check
 

Cargo.toml

@@ -28,20 +28,19 @@ tracing-opentelemetry-0-29 = [
 __private_docs = ["tracing-subscriber/time", "tracing-subscriber/local-time"]
 
 [dependencies]
-serde = "1.0.202"
-serde_json = "1.0.117"
-uuid = { version = "1.10.0", features = ["v4"] }
+# Public dependencies
+serde = { version = "1.0.202", public = true, default-features = false, features = ["std"] }
+serde_json = { version = "1.0.117", public = true, default-features = false, features = ["std"] }
+tracing-core = { version = "0.1.32", public = true, default-features = false }
+tracing = { version = "0.1.40", public = true, default-features = false, features = ["std"] }
+tracing-subscriber = { version = "0.3.18", public = true, default-features = false, features = ["std", "registry", "fmt"] }
 
-tracing = { version = "0.1.40", default-features = false, features = ["std"] }
-tracing-core = { version = "0.1.32", default-features = false }
+# Private dependencies
 tracing-log = { version = "0.2.0", default-features = false, optional = true }
 tracing-serde = { version = "0.2.0", default-features = false }
-tracing-subscriber = { version = "0.3.18", default-features = false, features = [
-    "std",
-    "registry",
-    "fmt",
-] }
+uuid = { version = "1.10.0", features = ["v4"] }
 
+# Optional dependencies
 # OpenTelemetry
 tracing-opentelemetry-0-25 = { package = "tracing-opentelemetry", version = "0.25.0", default-features = false, optional = true }
 opentelemetry-0-24 = { package = "opentelemetry", version = "0.24.0", default-features = false, optional = true }