fix(onnxruntime): clean CMake cache when applying Eigen hash patch

The Eigen hash patch needs to force CMake reconfiguration when applied
to existing source. CMake caches the old hash in build artifacts, causing
the patch to be ineffective on re-runs.

Changes:
- Add check to see if file is already patched (idempotent)
- Clean CMake build directory after patching to force reconfiguration
- This ensures the new hash is used even when source already exists

Author: jdalton

packages/onnxruntime/scripts/build.mjs

@@ -68,8 +68,10 @@ async function cloneOnnxSource() {
 
   printHeader('Cloning ONNX Runtime Source')
 
+  let needsPatch = false
   if (existsSync(ONNX_SOURCE_DIR)) {
     printStep('ONNX Runtime source already exists, skipping clone')
+    needsPatch = true
   } else {
     await fs.mkdir(BUILD_DIR, { recursive: true })
 
@@ -80,19 +82,36 @@ async function cloneOnnxSource() {
     })
 
     printSuccess(`ONNX Runtime ${ONNX_VERSION} cloned`)
+    needsPatch = true
   }
 
   // Patch eigen.cmake to accept the current Eigen hash from GitLab.
   // GitLab changed the archive format, causing hash mismatch.
-  printStep('Patching eigen.cmake to accept current Eigen hash...')
-  const eigenCmakePath = path.join(ONNX_SOURCE_DIR, 'cmake', 'external', 'eigen.cmake')
-  const eigenCmake = await fs.readFile(eigenCmakePath, 'utf-8')
-  const updatedEigenCmake = eigenCmake.replace(
-    /URL_HASH SHA1=be8be39fdbc6e60e94fa7870b280707069b5b81a/g,
-    'URL_HASH SHA1=32b145f525a8308d7ab1c09388b2e288312d8eba'
-  )
-  await fs.writeFile(eigenCmakePath, updatedEigenCmake, 'utf-8')
-  printSuccess('Eigen hash updated')
+  if (needsPatch) {
+    printStep('Patching eigen.cmake to accept current Eigen hash...')
+    const eigenCmakePath = path.join(ONNX_SOURCE_DIR, 'cmake', 'external', 'eigen.cmake')
+    const eigenCmake = await fs.readFile(eigenCmakePath, 'utf-8')
+
+    // Check if already patched.
+    if (eigenCmake.includes('32b145f525a8308d7ab1c09388b2e288312d8eba')) {
+      printStep('Eigen hash already patched')
+    } else {
+      const updatedEigenCmake = eigenCmake.replace(
+        /URL_HASH SHA1=be8be39fdbc6e60e94fa7870b280707069b5b81a/g,
+        'URL_HASH SHA1=32b145f525a8308d7ab1c09388b2e288312d8eba'
+      )
+      await fs.writeFile(eigenCmakePath, updatedEigenCmake, 'utf-8')
+      printSuccess('Eigen hash updated')
+
+      // Clean CMake cache to force reconfiguration with new hash.
+      const cmakeBuildDir = path.join(ONNX_SOURCE_DIR, 'build')
+      if (existsSync(cmakeBuildDir)) {
+        printStep('Cleaning CMake cache to apply patch...')
+        await fs.rm(cmakeBuildDir, { recursive: true, force: true })
+        printSuccess('CMake cache cleaned')
+      }
+    }
+  }
 
   await createCheckpoint('onnxruntime', 'cloned')
 }