use a node script instead of bash to move the compilation cache

.github/actions/cache-query-compilation/action.yml

@@ -49,12 +49,7 @@ runs:
       shell: bash 
       run: |
         # Move all the existing cache into another folder, so we only preserve the cache for the current queries.
-        mkdir -p ${COMBINED_CACHE_DIR}
-        rm -f **/.cache/{lock,size} # -f to avoid errors if the cache is empty.
-        # copy the contents of the .cache folders into the combined cache folder.
-        cp -r **/.cache/* ${COMBINED_CACHE_DIR}/ || : # ignore missing files
-        # clean up the .cache folders
-        rm -rf **/.cache/*
+        node $GITHUB_WORKSPACE/.github/actions/cache-query-compilation/move-caches.js ${COMBINED_CACHE_DIR}
 
         echo "compdir=${COMBINED_CACHE_DIR}" >> $GITHUB_OUTPUT
       env: 

.github/actions/cache-query-compilation/move-caches.js

@@ -0,0 +1,80 @@
+// # Move all the existing cache into another folder, so we only preserve the cache for the current queries.
+// mkdir -p ${COMBINED_CACHE_DIR}
+// rm -f **/.cache/{lock,size} # -f to avoid errors if the cache is empty.
+// # copy the contents of the .cache folders into the combined cache folder.
+// cp -r **/.cache/* ${COMBINED_CACHE_DIR}/ || : # ignore missing files
+// # clean up the .cache folders
+// rm -rf **/.cache/*
+
+const fs = require("fs");
+const path = require("path");
+
+// the first argv is the cache folder to create.
+const COMBINED_CACHE_DIR = process.argv[2];
+
+function* walkCaches(dir) {
+  const files = fs.readdirSync(dir);
+  for (const file of files) {
+    const filePath = path.join(dir, file);
+    if (!fs.existsSync(filePath)) {
+      continue;
+    }
+    const stat = fs.statSync(filePath);
+    if (stat.isDirectory()) {
+      yield* walkCaches(filePath);
+      if (file === ".cache") {
+        yield filePath;
+      }
+    }
+  }
+}
+
+async function copyDir(src, dest) {
+  for await (const file of await fs.promises.readdir(src)) {
+    const srcPath = path.join(src, file);
+    const destPath = path.join(dest, file);
+    const stat = await fs.promises.stat(srcPath);
+    if (stat.isDirectory()) {
+      if (!fs.existsSync(destPath)) {
+        fs.mkdirSync(destPath);
+      }
+      await copyDir(srcPath, destPath);
+    } else {
+      await fs.promises.copyFile(srcPath, destPath);
+    }
+  }
+}
+
+async function main() {
+  const cacheDirs = [...walkCaches(".")];
+
+  for (const dir of cacheDirs) {
+    console.log(`Found .cache dir at ${dir}`);
+  }
+
+  // mkdir -p ${COMBINED_CACHE_DIR}
+  fs.mkdirSync(COMBINED_CACHE_DIR, { recursive: true });
+
+  // rm -f **/.cache/{lock,size} # -f to avoid errors if the cache is empty.
+  await Promise.all(
+    cacheDirs.map((cacheDir) =>
+      (async function () {
+        await fs.promises.rm(path.join(cacheDir, "lock"), { force: true });
+        await fs.promises.rm(path.join(cacheDir, "size"), { force: true });
+      })()
+    )
+  );
+
+  // # copy the contents of the .cache folders into the combined cache folder.
+  // cp -r **/.cache/* ${COMBINED_CACHE_DIR}/ || : # ignore missing files
+  await Promise.all(
+    cacheDirs.map((cacheDir) => copyDir(cacheDir, COMBINED_CACHE_DIR))
+  );
+
+  // # clean up the .cache folders
+  // rm -rf **/.cache/*
+  await Promise.all(
+    cacheDirs.map((cacheDir) => fs.promises.rm(cacheDir, { recursive: true }))
+  );
+}
+main();