Support proc macro test dependencies

src/dependencies.rs

@@ -100,20 +100,11 @@ pub(crate) fn build_dependencies(config: &Config) -> Result<Dependencies> {
             continue;
         };
         if let cargo_metadata::Message::CompilerArtifact(artifact) = message {
-            if artifact
-                .filenames
-                .iter()
-                .any(|f| f.ends_with("build-script-build"))
-            {
-                continue;
-            }
-            // Check that we only collect rmeta and rlib crates, not build script crates
-            if artifact
-                .filenames
-                .iter()
-                .any(|f| !matches!(f.extension(), Some("rlib" | "rmeta")))
-            {
-                continue;
+            for ctype in artifact.target.crate_types {
+                match ctype.as_str() {
+                    "proc-macro" | "lib" => {}
+                    _ => continue,
+                }
             }
             for filename in &artifact.filenames {
                 import_paths.insert(filename.parent().unwrap().into());

src/rustc_stderr.rs

@@ -173,7 +173,7 @@ pub(crate) fn process(file: &Path, stderr: &[u8]) -> Diagnostics {
     let mut rendered = Vec::new();
     let mut messages = vec![];
     let mut messages_from_unknown_file_or_line = vec![];
-    for (line_number, line) in stderr.lines_with_terminator().enumerate() {
+    for line in stderr.lines_with_terminator() {
         if line.starts_with_str(b"{") {
             match serde_json::from_slice::<RustcMessage>(line) {
                 Ok(msg) => {
@@ -187,11 +187,9 @@ pub(crate) fn process(file: &Path, stderr: &[u8]) -> Diagnostics {
                         None,
                     );
                 }
-                Err(err) => {
-                    panic!(
-                        "failed to parse rustc JSON output at line {line_number}: {err}: {}",
-                        line.to_str_lossy()
-                    )
+                Err(_) => {
+                    // FIXME: add a way to swap out the `process` function, so that cargo can use a different one from rustc
+                    // The RustcMessage json just happens to match between the two
                 }
             }
         } else {

tests/integration.rs

@@ -32,6 +32,11 @@ fn main() -> Result<()> {
         .envs
         .push(("BLESS".into(), (!args.check).then(|| String::new().into())));
 
+    config
+        .program
+        .envs
+        .push(("RUST_BACKTRACE".into(), Some("0".into())));
+
     config.stdout_filter("in ([0-9]m )?[0-9\\.]+s", "");
     config.stdout_filter(r#""--out-dir"(,)? "[^"]+""#, r#""--out-dir"$1 "$$TMP"#);
     config.filter("\\.exe", b"");

tests/integrations/basic-bin/tests/actual_tests/foomp.rs

@@ -1,5 +1,9 @@
+//@normalize-stderr-test: "(file name should be).*" -> "$1"
+
 use basic_bin::add;
-//~^ ERROR: unresolved import `basic_bin`
+//~^ ERROR: can't find crate for `basic_bin`
+//~| ERROR: file name should be
+//~| ERROR: extern location for basic_bin is of an unknown type
 
 fn main() {
     add("42", 3);

tests/integrations/basic-bin/tests/actual_tests/foomp.stderr

@@ -1,9 +1,21 @@
-error[E0432]: unresolved import `basic_bin`
- --> tests/actual_tests/foomp.rs:1:5
+error: extern location for basic_bin is of an unknown type: $DIR/tests/integrations/basic-bin/../../../target/$TMP/$TRIPLE/debug/basic_bin
+ --> tests/actual_tests/foomp.rs:3:5
   |
-1 | use basic_bin::add;
-  |     ^^^^^^^^^ use of undeclared crate or module `basic_bin`
+3 | use basic_bin::add;
+  |     ^^^^^^^^^
 
-error: aborting due to 1 previous error
+error: file name should be
+ --> tests/actual_tests/foomp.rs:3:5
+  |
+3 | use basic_bin::add;
+  |     ^^^^^^^^^
+
+error[E0463]: can't find crate for `basic_bin`
+ --> tests/actual_tests/foomp.rs:3:5
+  |
+3 | use basic_bin::add;
+  |     ^^^^^^^^^ can't find crate
+
+error: aborting due to 3 previous errors
 
-For more information about this error, try `rustc --explain E0432`.
+For more information about this error, try `rustc --explain E0463`.

tests/integrations/basic-fail/Cargo.stdout

@@ -373,7 +373,7 @@ error: internal compiler error: no errors reported for args
 
 thread 'rustc' panicked at compiler/rustc_errors/src/lib.rs:
 aborting due to `-Z treat-err-as-bug=1`
-stack backtrace:
+note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace
 
 error: the compiler unexpectedly panicked. this is a bug.
 

tests/integrations/basic/Cargo.stdout

@@ -13,6 +13,7 @@ Building aux file tests/actual_tests/auxiliary/derive_proc_macro.rs ... ok
 tests/actual_tests/aux_derive.rs ... ok
 Building aux file tests/actual_tests/auxiliary/the_proc_macro.rs ... ok
 tests/actual_tests/aux_proc_macro.rs ... ok
+tests/actual_tests/dep_derive.rs ... ok
 tests/actual_tests/error_above.rs ... ok
 tests/actual_tests/executable.rs ... ok
 tests/actual_tests/foomp-rustfix.rs ... ok
@@ -28,7 +29,7 @@ tests/actual_tests/unicode.rs ... ok
 tests/actual_tests/windows_paths.rs ... ok
 tests/actual_tests/subdir/aux_proc_macro.rs ... ok
 
-test result: ok. 16 passed;
+test result: ok. 17 passed;
 
 
 running 0 tests

tests/integrations/basic/Cargo.toml

@@ -5,6 +5,9 @@ edition = "2021"
 
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
 
+[dependencies]
+serde_derive = "1.0"
+
 [dev-dependencies]
 ui_test = { path = "../../.."}
 tempfile = "3.3.0"

tests/integrations/basic/tests/actual_tests/dep_derive.rs

@@ -0,0 +1,6 @@
+//@run
+
+#[macro_use]
+extern crate serde_derive;
+
+fn main() {}

tests/integrations/basic/tests/actual_tests/dep_derive.stderr

@@ -0,0 +1,10 @@
+warning: unused `#[macro_use]` import
+ --> tests/actual_tests/dep_derive.rs:3:1
+  |
+3 | #[macro_use]
+  | ^^^^^^^^^^^^
+  |
+  = note: `#[warn(unused_imports)]` on by default
+
+warning: 1 warning emitted
+