feat: Add support for optimizer compiler args

CONTRIBUTING.md

@@ -11,6 +11,9 @@ cd ape-solidity
 python3 -m venv venv
 source venv/bin/activate
 
+#install setuptools
+pip install setuptools
+
 # install ape-solidity into the virtual environment
 python setup.py install
 

README.md

@@ -146,6 +146,22 @@ solidity:
   via_ir: True
 ```
 
+#### Yul Optimization
+
+You can enable `solc`'s `--yul` flag by adding the following values to your `ape-config.yaml`
+
+```yaml
+solidity:
+  optimization_yul: True
+```
+
+You can also set the optimizer steps by adding the following values to your `ape-config.yaml`. You can find the list of optimizer steps [here](https://docs.soliditylang.org/en/v0.8.22/using-the-compiler.html#optimizer-steps). This requires the yul optimizer to be enabled.
+
+```yaml
+solidity:
+  optimization_steps: "dhfoDgvulfnTUtnIf"
+```
+
 ### Contract Flattening
 
 `ape-solidity` has contract-flattening capabilities.

ape_solidity/compiler.py

@@ -146,6 +146,20 @@ class SolidityConfig(PluginConfig):
     the compiler (same as ``False``).
     """
 
+    optimization_yul: Optional[bool] = None
+    """
+    Set to ``True`` to turn on Yul optimization.
+    Defaults to ``None`` which does not pass the flag to
+    the compiler (same as ``False``).
+    """
+
+    optimization_steps: Optional[str] = None
+    """
+    Set to a string of optimizer steps to use.
+    Defaults to ``None`` which does not pass the flag to
+    the compiler (same as ``False``).
+    """
+
 
 def _get_flattened_source(path: Path, name: Optional[str] = None) -> str:
     name = name or path.name
@@ -361,6 +375,19 @@ def _get_settings_from_version_map(
             if solc_version >= Version("0.7.5") and config.via_ir is not None:
                 version_settings["viaIR"] = config.via_ir
 
+            if config.optimization_yul is not None:
+                if solc_version >= Version("0.8.22"):
+                    version_settings["optimizer"]["yul"] = config.optimization_yul
+                    if (
+                        config.optimization_steps is not None
+                    ):  # needs yul so is inside the yul check
+                        version_settings["optimizer"]["steps"] = config.optimization_steps
+                else:
+                    logger.warning(
+                        """Yul optimization and steps are not supported for this version of solc
+                     (Need >= 0.8.22)."""
+                    )
+
             settings[solc_version] = version_settings
 
             # TODO: Filter out libraries that are not used for this version.