Vendor things

third-party/vendor/wasm-bindgen-shared/build.rs

@@ -0,0 +1,35 @@
+use std::collections::hash_map::DefaultHasher;
+use std::env;
+use std::hash::Hasher;
+use std::path::PathBuf;
+use std::process::Command;
+
+fn main() {
+    set_schema_version_env_var();
+
+    let rev = Command::new("git")
+        .arg("rev-parse")
+        .arg("HEAD")
+        .output()
+        .ok()
+        .map(|s| s.stdout)
+        .and_then(|s| String::from_utf8(s).ok());
+    if let Some(rev) = rev {
+        if rev.len() >= 9 {
+            println!("cargo:rustc-env=WBG_VERSION={}", &rev[..9]);
+        }
+    }
+}
+
+fn set_schema_version_env_var() {
+    let cargo_manifest_dir = env::var("CARGO_MANIFEST_DIR").expect(
+        "The `CARGO_MANIFEST_DIR` environment variable is needed to locate the schema file",
+    );
+    let schema_file = PathBuf::from(cargo_manifest_dir).join("src/lib.rs");
+    let schema_file = std::fs::read(schema_file).unwrap();
+
+    let mut hasher = DefaultHasher::new();
+    hasher.write(&schema_file);
+
+    println!("cargo:rustc-env=SCHEMA_FILE_HASH={}", hasher.finish());
+}