Scaffold utility and library (#3)

Signed-off-by: Cyrill Leutwiler <bigcyrill@hotmail.com>
Signed-off-by: xermicus <bigcyrill@hotmail.com>

crates/compiler/src/solc.rs

@@ -0,0 +1,42 @@
+//! Implements the [SolidityCompiler] trait with solc for
+//! compiling contracts to EVM bytecode.
+
+use std::{
+    path::PathBuf,
+    process::{Command, Stdio},
+};
+
+use crate::{CompilerInput, CompilerOutput, SolidityCompiler};
+
+pub struct Solc {
+    solc_path: PathBuf,
+}
+
+impl SolidityCompiler for Solc {
+    type Options = ();
+
+    fn build(
+        &self,
+        input: CompilerInput<Self::Options>,
+    ) -> anyhow::Result<CompilerOutput<Self::Options>> {
+        let mut child = Command::new(&self.solc_path)
+            .stdin(Stdio::piped())
+            .stdout(Stdio::piped())
+            .stderr(Stdio::piped())
+            .arg("--standard-json")
+            .spawn()?;
+
+        let stdin = child.stdin.as_mut().expect("should be piped");
+        serde_json::to_writer(stdin, &input.input)?;
+
+        let output = child.wait_with_output()?.stdout;
+        Ok(CompilerOutput {
+            input,
+            output: serde_json::from_slice(&output)?,
+        })
+    }
+
+    fn new(solc_path: PathBuf) -> Self {
+        Self { solc_path }
+    }
+}