Fixed continously building build.rs

Cargo.lock

@@ -160,6 +160,15 @@ dependencies = [
  "serde",
 ]
 
+[[package]]
+name = "build-deps"
+version = "0.1.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "64f14468960818ce4f3e3553c32d524446687884f8e7af5d3e252331d8a87e43"
+dependencies = [
+ "glob",
+]
+
 [[package]]
 name = "bumpalo"
 version = "3.4.0"
@@ -2076,6 +2085,7 @@ dependencies = [
  "anyhow",
  "atty",
  "blake3",
+ "build-deps",
  "bytesize",
  "cfg-if",
  "colored",

Cargo.toml

@@ -56,6 +56,7 @@ members = [
 
 [build-dependencies]
 test-generator = { path = "tests/lib/test-generator" }
+build-deps = "0.1.4"
 anyhow = "1.0"
 glob = "0.3"
 rustc_version = "0.2"

build.rs

@@ -15,8 +15,12 @@ use test_generator::{
 
 fn main() -> anyhow::Result<()> {
     println!("cargo:rerun-if-changed=tests/ignores.txt");
-    println!("cargo:rerun-if-changed=tests/wasi-wast/wasi/unstable/*");
-    println!("cargo:rerun-if-changed=tests/wasi-wast/wasi/snapshot1/*");
+    // As rerun-if-changed doesn't support globs, we use another crate
+    // to check changes in directories.
+    build_deps::rerun_if_changed_paths("tests/wasi-wast/wasi/unstable/*")
+        .expect("Can't get directory");
+    build_deps::rerun_if_changed_paths("tests/wasi-wast/wasi/snapshot1/*")
+        .expect("Can't get directory");
 
     let out_dir = PathBuf::from(
         env::var_os("OUT_DIR").expect("The OUT_DIR environment variable must be set"),