-fixed exception when rez-build ran in non-package dir

Author: ajohns

src/rez/build_system.py

@@ -26,18 +26,24 @@ def get_valid_build_systems(working_dir, package=None):
         List of class: Valid build system class types.
     """
     from rez.plugin_managers import plugin_manager
+    from rez.exceptions import PackageMetadataError
 
-    package = package or get_developer_package(working_dir)
+    try:
+        package = package or get_developer_package(working_dir)
+    except PackageMetadataError:
+        # no package, or bad package
+        pass
 
-    if getattr(package, "build_command", None) is not None:
-        buildsys_name = "custom"
-    else:
-        buildsys_name = getattr(package, "build_system", None)
+    if package:
+        if getattr(package, "build_command", None) is not None:
+            buildsys_name = "custom"
+        else:
+            buildsys_name = getattr(package, "build_system", None)
 
-    # package explicitly specifies build system
-    if buildsys_name:
-        cls = plugin_manager.get_plugin_class('build_system', buildsys_name)
-        return [cls]
+        # package explicitly specifies build system
+        if buildsys_name:
+            cls = plugin_manager.get_plugin_class('build_system', buildsys_name)
+            return [cls]
 
     # detect valid build systems
     clss = []

src/rez/cli/build.py

@@ -13,11 +13,16 @@
 
 def get_current_developer_package():
     from rez.packages_ import get_developer_package
+    from rez.exceptions import PackageMetadataError
 
     global _package
 
     if _package is None:
-        _package = get_developer_package(os.getcwd())
+        try:
+            _package = get_developer_package(os.getcwd())
+        except PackageMetadataError:
+            # no package, or bad package
+            pass
 
     return _package