feat(solc): yul compilation (#994)

* added yul compilation

* fix doctest

* fixes

* changelog

* cleanup

* fmt

* test update

* lint

* ci fix

Co-authored-by: Georgios Konstantopoulos <me@gakonst.com>

CHANGELOG.md

@@ -47,6 +47,7 @@
 - Add a getter to `ProjectCompileOutput` that returns a mapping of compiler
   versions to a vector of name + contract struct tuples
   [#908](https://github.com/gakonst/ethers-rs/pull/908)
+- Add Yul compilation [994](https://github.com/gakonst/ethers-rs/pull/994)
 - Enforce commutativity of ENS reverse resolution
   [#996](https://github.com/gakonst/ethers-rs/pull/996)
 

ethers-solc/src/artifacts/mod.rs

@@ -52,13 +52,37 @@ pub struct CompilerInput {
 
 impl CompilerInput {
     /// Reads all contracts found under the path
-    pub fn new(path: impl AsRef<Path>) -> Result<Self, SolcIoError> {
+    pub fn new(path: impl AsRef<Path>) -> Result<Vec<Self>, SolcIoError> {
         Source::read_all_from(path.as_ref()).map(Self::with_sources)
     }
 
     /// Creates a new Compiler input with default settings and the given sources
-    pub fn with_sources(sources: Sources) -> Self {
-        Self { language: "Solidity".to_string(), sources, settings: Default::default() }
+    pub fn with_sources(sources: Sources) -> Vec<Self> {
+        let mut solidity_sources = BTreeMap::new();
+        let mut yul_sources = BTreeMap::new();
+        for (path, source) in sources {
+            if path.extension() == Some(std::ffi::OsStr::new("yul")) {
+                yul_sources.insert(path, source);
+            } else {
+                solidity_sources.insert(path, source);
+            }
+        }
+        let mut res = Vec::new();
+        if !solidity_sources.is_empty() {
+            res.push(Self {
+                language: "Solidity".to_string(),
+                sources: solidity_sources,
+                settings: Default::default(),
+            });
+        }
+        if !yul_sources.is_empty() {
+            res.push(Self {
+                language: "Yul".to_string(),
+                sources: yul_sources,
+                settings: Default::default(),
+            });
+        }
+        res
     }
 
     /// Sets the settings for compilation
@@ -99,12 +123,6 @@ impl CompilerInput {
     }
 }
 
-impl Default for CompilerInput {
-    fn default() -> Self {
-        Self::with_sources(Default::default())
-    }
-}
-
 #[derive(Clone, Debug, PartialEq, Eq, Serialize, Deserialize)]
 #[serde(rename_all = "camelCase")]
 pub struct Settings {
@@ -805,6 +823,12 @@ impl CompilerOutput {
             err.source_location.as_ref().map(|s| files.contains(s.file.as_str())).unwrap_or(true)
         });
     }
+
+    pub fn merge(&mut self, other: CompilerOutput) {
+        self.errors.extend(other.errors);
+        self.contracts.extend(other.contracts);
+        self.sources.extend(other.sources);
+    }
 }
 
 /// A wrapper helper type for the `Contracts` type alias

ethers-solc/src/compile/mod.rs

@@ -410,7 +410,12 @@ impl Solc {
     /// Convenience function for compiling all sources under the given path
     pub fn compile_source(&self, path: impl AsRef<Path>) -> Result<CompilerOutput> {
         let path = path.as_ref();
-        self.compile(&CompilerInput::new(path)?)
+        let mut res: CompilerOutput = Default::default();
+        for input in CompilerInput::new(path)? {
+            let output = self.compile(&input)?;
+            res.merge(output)
+        }
+        Ok(res)
     }
 
     /// Same as [`Self::compile()`], but only returns those files which are included in the
@@ -425,7 +430,7 @@ impl Solc {
     /// # fn main() -> Result<(), Box<dyn std::error::Error>> {
     ///  use ethers_solc::{CompilerInput, Solc};
     /// let solc = Solc::default();
-    /// let input = CompilerInput::new("./contracts")?;
+    /// let input = CompilerInput::new("./contracts")?[0].clone();
     /// let output = solc.compile_exact(&input)?;
     /// # Ok(())
     /// # }
@@ -571,8 +576,8 @@ impl Solc {
     /// use ethers_solc::{CompilerInput, Solc};
     /// let solc1 = Solc::default();
     /// let solc2 = Solc::default();
-    /// let input1 = CompilerInput::new("contracts").unwrap();
-    /// let input2 = CompilerInput::new("src").unwrap();
+    /// let input1 = CompilerInput::new("contracts").unwrap()[0].clone();
+    /// let input2 = CompilerInput::new("src").unwrap()[0].clone();
     ///
     /// let outputs = Solc::compile_many([(solc1, input1), (solc2, input2)], 2).await.flattened().unwrap();
     /// # }

ethers-solc/src/compile/project.rs

@@ -341,24 +341,23 @@ fn compile_sequential(
             solc.args
         );
 
-        let input = CompilerInput::with_sources(sources)
+        for input in CompilerInput::with_sources(sources) {
+            let input = input
                 .settings(settings.clone())
                 .normalize_evm_version(&version)
                 .with_remappings(paths.remappings.clone());
-
             tracing::trace!(
                 "calling solc `{}` with {} sources {:?}",
                 version,
                 input.sources.len(),
                 input.sources.keys()
             );
-
             report::solc_spawn(&solc, &version, &input);
             let output = solc.compile_exact(&input)?;
             report::solc_success(&solc, &version, &output);
             tracing::trace!("compiled input, output has error: {}", output.has_error());
-
-        aggregated.extend(version, output);
+            aggregated.extend(version.clone(), output);
+        }
     }
     Ok(aggregated)
 }
@@ -383,13 +382,14 @@ fn compile_parallel(
             // nothing to compile
             continue
         }
-
-        let job = CompilerInput::with_sources(sources)
+        for input in CompilerInput::with_sources(sources) {
+            let job = input
                 .settings(settings.clone())
                 .normalize_evm_version(&version)
                 .with_remappings(paths.remappings.clone());
 
-        jobs.push((solc, version, job))
+            jobs.push((solc.clone(), version.clone(), job))
+        }
     }
 
     // start a rayon threadpool that will execute all `Solc::compile()` processes

ethers-solc/src/utils.rs

@@ -67,7 +67,9 @@ pub fn source_files(root: impl AsRef<Path>) -> Vec<PathBuf> {
         .into_iter()
         .filter_map(Result::ok)
         .filter(|e| e.file_type().is_file())
-        .filter(|e| e.path().extension().map(|ext| ext == "sol").unwrap_or_default())
+        .filter(|e| {
+            e.path().extension().map(|ext| (ext == "sol") || (ext == "yul")).unwrap_or_default()
+        })
         .map(|e| e.path().into())
         .collect()
 }

ethers-solc/test-data/yul-sample/Dapp.sol

@@ -0,0 +1,7 @@
+// SPDX-License-Identifier: GPL-3.0-or-later
+pragma solidity >=0.6.6;
+
+contract Dapp {
+
+    function modified() public {}
+}

ethers-solc/test-data/yul-sample/SimpleStore.yul

@@ -0,0 +1,11 @@
+object "SimpleStore" {
+  code {
+    datacopy(0, dataoffset("Runtime"), datasize("Runtime"))
+    return(0, datasize("Runtime"))
+  }
+  object "Runtime" {
+    code {
+      calldatacopy(0, 0, 36) // write calldata to memory
+    }
+  }
+}

ethers-solc/tests/project.rs

@@ -92,6 +92,36 @@ fn can_compile_dapp_sample() {
     assert_eq!(cache, updated_cache);
 }
 
+#[test]
+fn can_compile_yul_sample() {
+    let root = PathBuf::from(env!("CARGO_MANIFEST_DIR")).join("test-data/yul-sample");
+    let paths = ProjectPathsConfig::builder().sources(root);
+    let project = TempProject::<ConfigurableArtifacts>::new(paths).unwrap();
+
+    let compiled = project.compile().unwrap();
+    assert!(compiled.find("Dapp").is_some());
+    assert!(compiled.find("SimpleStore").is_some());
+    assert!(!compiled.has_compiler_errors());
+
+    // nothing to compile
+    let compiled = project.compile().unwrap();
+    assert!(compiled.find("Dapp").is_some());
+    assert!(compiled.find("SimpleStore").is_some());
+    assert!(compiled.is_unchanged());
+
+    let cache = SolFilesCache::read(project.cache_path()).unwrap();
+
+    // delete artifacts
+    std::fs::remove_dir_all(&project.paths().artifacts).unwrap();
+    let compiled = project.compile().unwrap();
+    assert!(compiled.find("Dapp").is_some());
+    assert!(compiled.find("SimpleStore").is_some());
+    assert!(!compiled.is_unchanged());
+
+    let updated_cache = SolFilesCache::read(project.cache_path()).unwrap();
+    assert_eq!(cache, updated_cache);
+}
+
 #[test]
 fn can_compile_configured() {
     let root = PathBuf::from(env!("CARGO_MANIFEST_DIR")).join("test-data/dapp-sample");