Add support for cross compiling with cross

.gitignore

@@ -16,3 +16,4 @@ test-crates/wheels/
 test-crates/targets/
 test-crates/venvs/
 node_modules
+.idea

Cargo.toml

@@ -40,7 +40,7 @@ base64 = "0.21.0"
 glob = "0.3.0"
 cargo-config2 = "0.1.9"
 cargo_metadata = "0.18.0"
-cargo-options = "0.7.1"
+cargo-options = "0.7.2"
 cbindgen = { version = "0.26.0", default-features = false }
 flate2 = "1.0.18"
 goblin = "0.7.1"

src/compile.rs

@@ -447,6 +447,10 @@ fn compile_target(
 
     debug!("Running {:?}", build_command);
 
+    let using_cross = build_command
+        .get_program()
+        .to_string_lossy()
+        .starts_with("cross");
     let mut cargo_build = build_command
         .spawn()
         .context("Failed to run `cargo rustc`")?;
@@ -494,8 +498,18 @@ fn compile_target(
                         .into_iter()
                         .zip(artifact.filenames);
                     for (crate_type, filename) in tuples {
+                        let path = if using_cross && filename.starts_with("/target") {
+                            // Convert cross target path in docker back to path on host
+                            context
+                                .cargo_metadata
+                                .target_directory
+                                .join(filename.strip_prefix("/target").unwrap())
+                                .into_std_path_buf()
+                        } else {
+                            filename.into()
+                        };
                         let artifact = BuildArtifact {
-                            path: filename.into(),
+                            path,
                             linked_paths: Vec::new(),
                         };
                         artifacts.insert(crate_type, artifact);

src/project_layout.rs

@@ -317,6 +317,10 @@ impl ProjectResolver {
         debug!("Resolving cargo metadata from {:?}", manifest_path);
         let cargo_metadata_extra_args = extract_cargo_metadata_args(cargo_options)?;
         let result = MetadataCommand::new()
+            // Force resolving metadata using cargo instead of instead of $CARGO env var
+            // to avoid getting wrong file path like target directory, for example `cross` would
+            // output paths in docker while we want paths on host.
+            .cargo_path("cargo")
             .manifest_path(manifest_path)
             .verbose(true)
             .other_options(cargo_metadata_extra_args)