chore(blockifier): verify cairo compiler repo (with correct tag) (#183)

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crates/blockifier/src/test_utils/cairo_compile.rs

@@ -1,10 +1,13 @@
-use std::process::Command;
+use std::path::{Path, PathBuf};
+use std::process::{Command, Output};
 use std::{env, fs};
 
 use cached::proc_macro::cached;
 use serde::{Deserialize, Serialize};
 
 const CAIRO0_PIP_REQUIREMENTS_FILE: &str = "tests/requirements.txt";
+const CAIRO1_REPO_RELATIVE_PATH_OVERRIDE_ENV_VAR: &str = "CAIRO1_REPO_RELATIVE_PATH";
+const DEFAULT_CAIRO1_REPO_RELATIVE_PATH: &str = "../../../cairo";
 
 /// Objects for simple deserialization of Cargo.toml to fetch the Cairo1 compiler version.
 /// The compiler itself isn't actually a dependency, so we compile by using the version of the
@@ -55,6 +58,30 @@ pub fn cairo1_compiler_version() -> String {
     }
 }
 
+/// Returns the path to the local Cairo1 compiler repository.
+/// Returns <sequencer_repo_root>/<RELATIVE_PATH_TO_CAIRO_REPO>, where the relative path can be
+/// overridden by the environment variable (otherwise, the default is used).
+fn local_cairo1_compiler_repo_path() -> PathBuf {
+    // Location of blockifier's Cargo.toml.
+    let manifest_dir = env::var("CARGO_MANIFEST_DIR").unwrap();
+
+    Path::new(&manifest_dir).join(match std::env::var(CAIRO1_REPO_RELATIVE_PATH_OVERRIDE_ENV_VAR) {
+        Ok(cairo1_repo_relative_path) => cairo1_repo_relative_path,
+        Err(_) => DEFAULT_CAIRO1_REPO_RELATIVE_PATH.into(),
+    })
+}
+
+/// Runs a command. If it has succeeded, it returns the command's output; otherwise, it panics with
+/// stderr output.
+fn run_and_verify_output(command: &mut Command) -> Output {
+    let output = command.output().unwrap();
+    if !output.status.success() {
+        let stderr_output = String::from_utf8(output.stderr).unwrap();
+        panic!("{stderr_output}");
+    }
+    output
+}
+
 /// Compiles a Cairo0 program using the deprecated compiler.
 pub fn cairo0_compile(path: String, extra_arg: Option<String>, debug_info: bool) -> Vec<u8> {
     verify_cairo0_compiler_deps();
@@ -74,6 +101,7 @@ pub fn cairo0_compile(path: String, extra_arg: Option<String>, debug_info: bool)
 
 /// Compiles a Cairo1 program using the compiler version set in the Cargo.toml.
 pub fn cairo1_compile(_path: String) -> Vec<u8> {
+    verify_cairo1_compiler_deps();
     todo!();
 }
 
@@ -107,3 +135,14 @@ fn verify_cairo0_compiler_deps() {
         CAIRO0_PIP_REQUIREMENTS_FILE
     );
 }
+
+fn verify_cairo1_compiler_deps() {
+    // Checkout the required version in the compiler repo.
+    run_and_verify_output(Command::new("git").args([
+        "-C",
+        // TODO(Dori, 1/6/2024): Handle CI case (repo path will be different).
+        local_cairo1_compiler_repo_path().to_str().unwrap(),
+        "checkout",
+        &format!("v{}", cairo1_compiler_version()),
+    ]));
+}