ci: support Cairo1 recompile in CI

Signed-off-by: Dori Medini <dori@starkware.co>

.github/workflows/compiled_cairo.yml

@@ -1,4 +1,4 @@
-name: CI
+name: Verify Cairo File Dependencies
 
 on:
   push:
@@ -13,14 +13,43 @@ on:
       - reopened
       - synchronize
     paths:
-     - 'crates/blockifier/feature_contracts/cairo0/**'
+     # A change in Cargo.toml may indicate Cairo compiler version change.
+      - 'Cargo.toml'
+      - 'crates/blockifier/feature_contracts/cairo0/**'
+      - 'crates/blockifier/feature_contracts/cairo1/**'
+      - 'crates/blockifier/tests/feature_contracts_compatibility_test.rs'
 
 jobs:
   verify_cairo_file_dependencies:
     runs-on: ubuntu-latest
+
     steps:
-      - uses: actions/checkout@v4
-      - uses: dtolnay/rust-toolchain@master
+      # Checkout blockifier into a dedicated directory - technical requirement in order to be able to checkout `cairo` in a sibling directory.
+      - name: checkout blockifier into `blockifier` directory.
+        uses: actions/checkout@v4
+        with:
+          repository: 'starkware-libs/blockifier'
+          path: 'blockifier'
+
+      - name: Read Cairo1 Tag to compile contracts with from Blockifier.
+        id: read-tag
+        # GITHUB_ENV is a variable github allocates for dynamic stuff inside workflow like our usage, name not customizable.
+        run: echo "TAG=$(cat blockifier/crates/blockifier/tests/cairo1_compiler_tag.txt)" >> $GITHUB_ENV
+
+      - name: Read legacy Cairo1 Tag to compile the legacy contract with.
+        id: read-legacy-tag
+        # GITHUB_ENV is a variable github allocates for dynamic stuff inside workflow like our usage, name not customizable.
+        run: echo "LEGACY_TAG=$(cat blockifier/crates/blockifier/tests/legacy_cairo1_compiler_tag.txt)" >> $GITHUB_ENV
+
+      - name: checkout cairo1 repo in order to compile cairo1 contracts.
+        uses: actions/checkout@v4
+        with:
+          repository: 'starkware-libs/cairo'
+          fetch-tags: tags
+          ref: ${{ env.TAG }}
+          path: 'cairo'
+
+      - uses: actions-rs/toolchain@master
         with:
           components: rustfmt
           toolchain: nightly-2024-01-12
@@ -30,5 +59,24 @@ jobs:
           python-version: '3.9'
           cache: 'pip'
       - run:
-          pip install -r crates/blockifier/tests/requirements.txt;
+          cd blockifier &&
+          pip install -r crates/blockifier/tests/requirements.txt &&
           cargo test verify_feature_contracts -- --include-ignored
+
+      - name: checkout legacy tag of cairo1 repo in order to compile the legacy contract.
+        uses: actions/checkout@v4
+        with:
+          repository: 'starkware-libs/cairo'
+          fetch-tags: tags
+          ref: ${{ env.LEGACY_TAG }}
+          path: 'cairo'
+
+      - name: Verify the legacy contract.
+        uses: actions-rs/toolchain@master
+        with:
+          components: rustfmt
+          toolchain: nightly-2024-01-12
+      - uses: Swatinem/rust-cache@v2
+      - run:
+          cd blockifier &&
+          LEGACY=1 cargo test verify_feature_contracts -- --include-ignored

crates/blockifier/src/test_utils/cairo_compile.rs

@@ -169,7 +169,6 @@ fn verify_cairo1_compiler_deps(git_tag_override: Option<String>) {
     // 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).
         cairo_repo_path.to_str().unwrap(),
         "checkout",
         &tag,

crates/blockifier/src/test_utils/contracts.rs

@@ -105,6 +105,10 @@ impl FeatureContract {
         }
     }
 
+    pub fn is_legacy(&self) -> bool {
+        matches!(self, Self::LegacyTestContract)
+    }
+
     /// Unique integer representing each unique contract. Used to derive "class hash" and "address".
     fn get_integer_base(self) -> u32 {
         self.get_cairo_version_bit()
@@ -191,10 +195,8 @@ impl FeatureContract {
                 cairo0_compile(self.get_source_path(), extra_arg, false)
             }
             CairoVersion::Cairo1 => {
-                let tag_override = match self {
-                    Self::LegacyTestContract => Some(LEGACY_CONTRACT_COMPILER_TAG.into()),
-                    _ => None,
-                };
+                let tag_override =
+                    if self.is_legacy() { Some(LEGACY_CONTRACT_COMPILER_TAG.into()) } else { None };
                 cairo1_compile(self.get_source_path(), tag_override)
             }
         }

crates/blockifier/tests/feature_contracts_compatibility_test.rs

@@ -19,32 +19,23 @@ const FIX_COMMAND: &str = "FIX_FEATURE_TEST=1 cargo test -- --ignored";
 // ```
 // Then, run the FIX_COMMAND above.
 
-// This test currently doesn't support Cairo1 contracts. To fix them you'll need to compile them one
-// by one:
-// 1. Clone the [cairo repo](https://github.com/starkware-libs/cairo).
-// 2. Checkout the commit defined in [the root Cargo.toml](../../../../Cargo.toml).
-// 3. From within the compiler repo root directory, run:
-// ```
-// PREFIX=~/workspace/blockifier/crates/blockifier/feature_contracts/cairo1
-// CONTRACT_NAME=<contract_base_filename>
-// cargo run --release --bin starknet-compile -- --single-file \
-//   $PREFIX/$CONTRACT_NAME.cairo \
-//   $PREFIX/compiled/$CONTRACT_NAME.sierra.json
-// cargo run --release --bin starknet-sierra-compile \
-//   $PREFIX/compiled/$CONTRACT_NAME.sierra.json \
-//   $PREFIX/compiled/$CONTRACT_NAME.casm.json
-// ```
-// TODO(Gilad, 1/1/2024): New year's resolution: support Cairo1 in the test.
+// To test Cairo1 feature contracts, first clone the Cairo repo and checkout the required tag.
+// The repo should be located next to the blockifier repo:
+// <WORKSPACE_DIR>/
+// - blockifier/
+// - cairo/
+// Then, run the FIX_COMMAND above.
 
 // Checks that:
 // 1. `TEST_CONTRACTS` dir exists and contains only `.cairo` files and the subdirectory
 // `COMPILED_CONTRACTS_SUBDIR`.
 // 2. for each `X.cairo` file in `TEST_CONTRACTS` there exists an `X_compiled.json` file in
 // `COMPILED_CONTRACTS_SUBDIR` which equals `starknet-compile-deprecated X.cairo --no_debug_info`.
-fn verify_feature_contracts_compatibility(fix: bool, cairo_version: CairoVersion) {
-    for contract in FeatureContract::all_feature_contracts()
-        .filter(|contract| contract.cairo_version() == cairo_version)
-    {
+fn verify_feature_contracts_compatibility(
+    fix: bool,
+    contracts_to_test: impl Iterator<Item = FeatureContract>,
+) {
+    for contract in contracts_to_test {
         // Compare output of cairo-file on file with existing compiled file.
         let expected_compiled_output = contract.compile();
         let existing_compiled_path = contract.get_compiled_path();
@@ -135,15 +126,28 @@ fn verify_feature_contracts_match_enum() {
     assert_eq!(compiled_paths_from_enum, compiled_paths_on_filesystem);
 }
 
+fn is_env_var_set(env_var: &str) -> bool {
+    std::env::var(env_var).is_ok()
+}
+
 #[rstest]
 #[ignore]
 fn verify_feature_contracts(
     #[values(CairoVersion::Cairo0, CairoVersion::Cairo1)] cairo_version: CairoVersion,
 ) {
-    if std::env::var("CI").is_ok() && matches!(cairo_version, CairoVersion::Cairo1) {
-        // TODO(Dori, 1/6/2024): Support Cairo1 contracts in the CI and remove this `if` statement.
-        return;
-    }
-    let fix_features = std::env::var("FIX_FEATURE_TEST").is_ok();
-    verify_feature_contracts_compatibility(fix_features, cairo_version)
+    let fix_features = is_env_var_set("FIX_FEATURE_TEST");
+    let legacy_mode = is_env_var_set("LEGACY");
+    let ci_mode = is_env_var_set("CI");
+
+    let contracts_to_test = FeatureContract::all_feature_contracts().filter(|contract| {
+        // If called with LEGACY environment variable set, only test legacy contracts (from CI
+        // or not).
+        // If tested from the CI *without* the LEGACY environment variable set, test only
+        // non-legacy contracts of the respective cairo version.
+        // If not tested from CI, test all contracts of the requested cairo version.
+        contract.cairo_version() == cairo_version
+            && (if legacy_mode { contract.is_legacy() } else { !ci_mode || !contract.is_legacy() })
+    });
+
+    verify_feature_contracts_compatibility(fix_features, contracts_to_test)
 }