Support for trybuild and similar macro testing tools

src/cleanup.ts

@@ -34,6 +34,26 @@ export async function cleanTargetDir(targetDir: string, packages: Packages, chec
 async function cleanProfileTarget(profileDir: string, packages: Packages, checkTimestamp = false) {
   core.debug(`cleaning profile directory "${profileDir}"`);
 
+  // Quite a few testing utility crates store compilation artifacts as nested
+  // workspaces under `target/tests`. Notably, `target/tests/target` and
+  // `target/tests/trybuild`.
+  if (path.basename(profileDir) === "tests") {
+    try {
+      // https://github.com/vertexclique/kaos/blob/9876f6c890339741cc5be4b7cb9df72baa5a6d79/src/cargo.rs#L25
+      // https://github.com/eupn/macrotest/blob/c4151a5f9f545942f4971980b5d264ebcd0b1d11/src/cargo.rs#L27
+      cleanTargetDir(path.join(profileDir, "target"), packages, checkTimestamp);
+    } catch { }
+    try {
+      // https://github.com/dtolnay/trybuild/blob/eec8ca6cb9b8f53d0caf1aa499d99df52cae8b40/src/cargo.rs#L50
+      cleanTargetDir(path.join(profileDir, "trybuild"), packages, checkTimestamp);
+    } catch { }
+
+    // Delete everything else.
+    await rmExcept(profileDir, new Set(["target", "trybuild"]), checkTimestamp);
+
+    return
+  }
+
   let keepProfile = new Set(["build", ".fingerprint", "deps"]);
   await rmExcept(profileDir, keepProfile);
 

tests/Cargo.toml

@@ -9,5 +9,8 @@ edition = "2021"
 reqwest = "0.11.18"
 watto = { git = "https://github.com/getsentry/watto", rev = "d71c8218506bddba102a124a460d64da25e303dc", features = ["strings"] }
 
+[dev-dependencies]
+trybuild = "1"
+
 [target.'cfg(not(target_env = "msvc"))'.dependencies]
 tikv-jemallocator = "0.5.4"

tests/tests/trybuild.rs

@@ -0,0 +1,6 @@
+#[test]
+fn test_trybuild() {
+    let t = trybuild::TestCases::new();
+    t.pass("tests/trybuild/empty_main.rs");
+    t.compile_fail("tests/trybuild/fail_to_compile.rs");
+}

tests/tests/trybuild/empty_main.rs

@@ -0,0 +1 @@
+fn main() {}

tests/tests/trybuild/fail_to_compile.rs

@@ -0,0 +1,3 @@
+fn main() {
+    "foobar".foobar();
+}

tests/tests/trybuild/fail_to_compile.stderr

@@ -0,0 +1,5 @@
+error[E0599]: no method named `foobar` found for reference `&'static str` in the current scope
+ --> tests/trybuild/fail_to_compile.rs:2:14
+  |
+2 |     "foobar".foobar();
+  |              ^^^^^^ method not found in `&str`