run azalea-client integration tests as one binary

per https://corrode.dev/blog/tips-for-faster-rust-compile-times/\#combine-all-integration-tests-into-a-single-binary <3

1 files changed, 43 insertions, 0 deletions

diff --git a/azalea-client/build.rs b/azalea-client/build.rs
new file mode 100644
index 00000000..49ef62db
--- /dev/null
+++ b/azalea-client/build.rs
@@ -0,0 +1,43 @@
+use std::{
+    fs::{self, File},
+    io::Write,
+};
+
+fn main() {
+    // Tell Cargo that if the given file changes, to rerun this build script.
+    println!("cargo::rerun-if-changed=tests");
+
+    let Ok(paths) = fs::read_dir("tests/simulation") else {
+        return;
+    };
+
+    let mut modules = Vec::new();
+
+    for path in paths {
+        let Ok(path) = path else {
+            continue;
+        };
+        let path = path.path();
+        if path.extension().is_none_or(|ext| ext != "rs") {
+            continue;
+        }
+        let mod_name = path.with_extension("");
+        let mod_name = mod_name.file_name().unwrap().to_string_lossy().to_string();
+        if mod_name == "mod" {
+            continue;
+        }
+        modules.push(mod_name);
+    }
+
+    let Ok(mut mod_rs) = File::create("tests/simulation/mod.rs") else {
+        return;
+    };
+    let _ = writeln!(
+        mod_rs,
+        "// This file is @generated by `azalea-client/build.rs`.\n"
+    );
+    modules.sort();
+    for mod_name in modules {
+        let _ = writeln!(mod_rs, "mod {mod_name};");
+    }
+}