ci: Switch cargo-public-api-crates to cargo-check-external-types (#613)

Author: tottoto

.github/workflows/CI.yml

@@ -95,20 +95,17 @@ jobs:
         manifest-path: tower-http/Cargo.toml
         command: check ${{ matrix.checks }}
 
-  cargo-public-api-crates:
+  external-types:
     runs-on: ubuntu-latest
     steps:
     - uses: actions/checkout@v5
-    # Pinned version due to failing `cargo-public-api-crates`.
     - uses: dtolnay/rust-toolchain@master
       with:
-        toolchain: nightly-2025-11-23
+        toolchain: nightly-2025-08-06
+    - name: Install cargo-check-external-types
+      uses: taiki-e/cache-cargo-install-action@v2
+      with:
+        tool: [email protected]
     - uses: Swatinem/rust-cache@v2
-    - name: Install cargo-public-api-crates
-      run: |
-        cargo install --git https://github.com/jplatte/cargo-public-api-crates
-    - name: Build rustdoc
-      run: |
-        cargo rustdoc --all-features --manifest-path tower-http/Cargo.toml -- -Z unstable-options --output-format json
-    - name: cargo public-api-crates check
-      run: cargo public-api-crates --manifest-path tower-http/Cargo.toml --skip-build check
+    - run: cargo check-external-types --all-features
+      working-directory: tower-http

tower-http/Cargo.toml

@@ -124,17 +124,16 @@ rustdoc-args = ["--cfg", "docsrs"]
 [package.metadata.playground]
 features = ["full"]
 
-[package.metadata.cargo-public-api-crates]
-allowed = [
-    "bytes",
-    "http",
-    "http_body",
-    "mime",
-    "pin-project-lite",
-    "tokio",
-    "tower",
-    "tower_layer",
-    "tower_service",
-    "tracing",
-    "tracing_core",
+[package.metadata.cargo_check_external_types]
+allowed_external_types = [
+    "bytes::*",
+    "http::*",
+    "http_body::*",
+    "mime::*",
+    "tokio::*",
+    "tower::*",
+    "tower_layer::*",
+    "tower_service::*",
+    "tracing::*",
+    "tracing_core::*",
 ]