feat: make protoc requirement optional (#103)

.github/workflows/ci.yml

@@ -56,7 +56,7 @@ jobs:
       - name: install rust
         uses: dtolnay/rust-toolchain@stable
         with:
-          toolchain: stable
+          toolchain: stable nightly
           components: rustfmt, clippy
       - name: install protoc
         uses: arduino/setup-protoc@v3    
@@ -71,7 +71,7 @@ jobs:
           RUSTDOCFLAGS: -D warnings
         run: cargo doc --workspace --all-features --no-deps --document-private-items
       - name: check formatting
-        run: cargo fmt --all -- --check
+        run: cargo +nightly fmt --all -- --check
       - name: check clippy
         run: cargo clippy --workspace --all-features --all-targets -- -D warnings --allow deprecated
       - name: check Cargo.toml sorting

Cargo.toml

@@ -20,7 +20,7 @@ prost = "0.13.3"
 prost-types = "0.13.3"
 regex = "1.11.1"
 secrecy = "0.8.0"
-sync_docs = "0.1.0"
+sync_docs = { git = "https://github.com/s2-streamstore/sync_docs" }
 thiserror = "1.0.67"
 tokio = { version = "1.41.1", features = ["time"] }
 tokio-muxt = "0.5.0"
@@ -32,7 +32,7 @@ tracing = "0.1.40"
 uuid = { version = "1.11.0", features = ["v4", "fast-rng"] }
 
 [build-dependencies]
-tonic-build = { version = "0.12.3", features = ["prost"] }
+tonic-build = { version = "0.12.3", features = ["prost"], optional = true }
 
 [dev-dependencies]
 rstest = "0.23.0"
@@ -41,6 +41,7 @@ tokio-stream = "0.1.16"
 
 [features]
 connector = []
+prost-build = ["dep:tonic-build"]
 
 [lints.clippy]
 unused_async = "deny"

build.rs

@@ -1,8 +1,12 @@
 fn main() -> Result<(), Box<dyn std::error::Error>> {
-    tonic_build::configure()
-        .bytes(["."])
-        .compile_protos(&["proto/s2/v1alpha/s2.proto"], &["proto"])?;
-
-    println!("cargo:rustc-env=COMPILED_PROST_FILE=s2.v1alpha.rs");
+    #[cfg(feature = "prost-build")]
+    {
+        tonic_build::configure()
+            .out_dir("src")
+            .bytes(["."])
+            .compile_protos(&["proto/s2/v1alpha/s2.proto"], &["proto"])?;
+        std::fs::rename("src/s2.v1alpha.rs", "src/api.rs")?;
+    }
+    println!("cargo:rustc-env=COMPILED_PROST_FILE=src/api.rs");
     Ok(())
 }