fix: change target directory output to match release tarball structure

ci/package_release.sh

@@ -10,20 +10,18 @@ strip ./target/release-with-lto/roc_language_server
 # to be able to delete "target" later
 cp target/release-with-lto/roc ./roc
 cp target/release-with-lto/roc_language_server ./roc_language_server
+cp target/release-with-lto/wasi-libc.a wasi-libc.a
 
 # delete unnecessary files and folders
-git clean -fdx --exclude roc --exclude roc_language_server
+git clean -fdx --exclude roc --exclude roc_language_server --exclude wasi-libc.a
 
-mkdir $1
+mkdir -p $1 $1/examples $1/crates/compiler/builtins/bitcode
 
+mv roc roc_language_server lib LICENSE LEGAL_DETAILS $1
 
-mv roc roc_language_server LICENSE LEGAL_DETAILS $1
-
-mkdir $1/examples
 mv examples/helloWorld.roc examples/platform-switching examples/cli $1/examples
 
-mkdir -p $1/crates/compiler/builtins/bitcode
 mv crates/roc_std $1/crates
 mv crates/compiler/builtins/bitcode/src $1/crates/compiler/builtins/bitcode
  
-tar -czvf "$1.tar.gz" $1
+tar -czvf "$1.tar.gz" $1

crates/compiler/build/src/link.rs

@@ -119,10 +119,17 @@ fn find_zig_glue_path() -> PathBuf {
 }
 
 fn find_wasi_libc_path() -> PathBuf {
+    // This path is available when built and run from source
     // Environment variable defined in wasi-libc-sys/build.rs
-    let wasi_libc_pathbuf = PathBuf::from(WASI_LIBC_PATH);
+    let build_path = PathBuf::from(WASI_LIBC_PATH);
-    if std::path::Path::exists(&wasi_libc_pathbuf) {
+    if std::path::Path::exists(&build_path) {
-        return wasi_libc_pathbuf;
+        return build_path;
+    }
+
+    // This path is available in the release tarball
+    match get_relative_path(Path::new("wasi-libc.a")) {
+        Some(path) if path.exists() => return path,
+        _ => (),
     }
 
     internal_error!("cannot find `wasi-libc.a`")

crates/wasi-libc-sys/build.rs

@@ -8,9 +8,17 @@ fn main() {
     println!("cargo:rerun-if-changed=build.rs");
     println!("cargo:rerun-if-changed=src/dummy.c");
 
+    // out_dir == "<project_root>/target/[<platform>/]<profile>/build/wasi_libc_sys_<hex>/"
     let out_dir = env::var("OUT_DIR").unwrap();
     let zig_cache_dir = PathBuf::from(&out_dir).join("zig-cache");
-    let out_file = PathBuf::from(&out_dir).join("wasi-libc.a");
+
+    // out_file == "<project_root>/target/[<platform>/]<profile>/lib/wasi-libc.a"
+    let mut out_file = PathBuf::from(&out_dir);
+    out_file.pop();
+    out_file.pop();
+    out_file.pop();
+    out_file.push("lib");
+    out_file.push("wasi-libc.a");
 
     // Compile a dummy C program with Zig, with our own private cache directory
     zig()
@@ -38,6 +46,7 @@ fn main() {
         .unwrap();
 
     // Copy libc to where Cargo expects the output of this crate
+    fs::create_dir_all(out_file.parent().unwrap()).unwrap();
     fs::copy(libc_path, &out_file).unwrap();
 
     println!(