Manifest parsing: avoid irrelevant files (#31144)

* Manifest directory may not contain manifest files: exclude non-manifest files
* Manifest files use different name for rocmcc: add translation for it

lib/spack/spack/cmd/external.py

@@ -177,7 +177,10 @@ def _collect_and_consume_cray_manifest_files(
 
     for directory in manifest_dirs:
         for fname in os.listdir(directory):
-            manifest_files.append(os.path.join(directory, fname))
+            if fname.endswith('.json'):
+                fpath = os.path.join(directory, fname)
+                tty.debug("Adding manifest file: {0}".format(fpath))
+                manifest_files.append(os.path.join(directory, fpath))
 
     if not manifest_files:
         raise NoManifestFileError(
@@ -185,6 +188,7 @@ def _collect_and_consume_cray_manifest_files(
             .format(cray_manifest.default_path))
 
     for path in manifest_files:
+        tty.debug("Reading manifest file: " + path)
         try:
             cray_manifest.read(path, not dry_run)
         except (spack.compilers.UnknownCompilerError, spack.error.SpackError) as e:

lib/spack/spack/cray_manifest.py

@@ -20,6 +20,7 @@
 
 compiler_name_translation = {
     'nvidia': 'nvhpc',
+    'rocm': 'rocmcc',
 }