[usdMaya] add filterTypes option to avoid exporting certain node types

third_party/maya/lib/usdMaya/CMakeLists.txt

@@ -171,6 +171,7 @@ pxr_test_scripts(
         testenv/testUsdExportCamera.py
         testenv/testUsdExportColorSets.py
         testenv/testUsdExportDisplayColor.py
+        testenv/testUsdExportFilterTypes.py
         testenv/testUsdExportFrameOffset.py
         testenv/testUsdExportInstances.py
         testenv/testUsdExportLocator.py
@@ -305,6 +306,21 @@ pxr_register_test(testUsdExportDisplayColor
         MAYA_APP_DIR=<PXR_TEST_DIR>/maya_profile
 )
 
+pxr_install_test_dir(
+    SRC testenv/UsdExportFilterTypesTest
+    DEST testUsdExportFilterTypes
+)
+pxr_register_test(testUsdExportFilterTypes
+    CUSTOM_PYTHON "${MAYA_BASE_DIR}/bin/mayapy"
+    COMMAND "${CMAKE_INSTALL_PREFIX}/tests/testUsdExportFilterTypes"
+    TESTENV testUsdExportFilterTypes
+    ENV
+        MAYA_PLUG_IN_PATH=${CMAKE_INSTALL_PREFIX}/third_party/maya/plugin
+        MAYA_SCRIPT_PATH=${CMAKE_INSTALL_PREFIX}/third_party/maya/share/usd/plugins/usdMaya/resources
+        MAYA_DISABLE_CIP=1
+        MAYA_APP_DIR=<PXR_TEST_DIR>/maya_profile
+)
+
 pxr_install_test_dir(
     SRC testenv/UsdExportFrameOffsetTest
     DEST testUsdExportFrameOffset

third_party/maya/lib/usdMaya/jobArgs.cpp

@@ -33,6 +33,9 @@
 #include "pxr/usd/usdGeom/tokens.h"
 
 #include <maya/MDagPath.h>
+#include <maya/MGlobal.h>
+#include <maya/MNodeClass.h>
+#include <maya/MTypeId.h>
 
 #include <ostream>
 #include <string>
@@ -347,6 +350,10 @@ operator <<(std::ostream& out, const PxrUsdMayaJobExportArgs& exportArgs)
     for (const MDagPath& dagPath : exportArgs.dagPaths) {
         out << "    " << dagPath.fullPathName().asChar() << std::endl;
     }
+    out << "_filteredTypeIds (" << exportArgs.GetFilteredTypeIds().size() << ")" << std::endl;
+    for (unsigned int id : exportArgs.GetFilteredTypeIds()) {
+        out << "    " << id << ": " << MNodeClass(MTypeId(id)).className() << std::endl;
+    }
 
     out << "chaserNames (" << exportArgs.chaserNames.size() << ")" << std::endl;
     for (const std::string& chaserName : exportArgs.chaserNames) {
@@ -436,6 +443,42 @@ const VtDictionary& PxrUsdMayaJobExportArgs::GetDefaultDictionary()
     return d;
 }
 
+void PxrUsdMayaJobExportArgs::AddFilteredTypeName(const MString& typeName)
+{
+    MNodeClass cls(typeName);
+    unsigned int id = cls.typeId().id();
+    if (id == 0) {
+        MGlobal::displayWarning(MString("Given excluded node type '") + typeName
+                + "' does not exist; ignoring");
+        return;
+    }
+    _filteredTypeIds.insert(id);
+    // We also insert all inherited types - only way to query this is through mel,
+    // which is slower, but this should be ok, as these queries are only done
+    // "up front" when the export starts, not per-node
+    MString queryCommand("nodeType -isTypeName -derived ");
+    queryCommand += typeName;
+    MStringArray inheritedTypes;
+    MStatus status = MGlobal::executeCommand(queryCommand, inheritedTypes, false, false);
+    if (!status) {
+        MGlobal::displayWarning(MString("Error querying derived types for '") + typeName
+                + "': " + status.errorString());
+        return;
+    }
+
+    for (unsigned int i=0; i < inheritedTypes.length(); ++i) {
+        if (inheritedTypes[i].length() == 0) continue;
+        id = MNodeClass(inheritedTypes[i]).typeId().id();
+        if (id == 0) {
+            // Unfortunately, the returned list will often include weird garbage, like
+            // "THconstraint" for "constraint", which cannot be converted to a MNodeClass,
+            // so just ignore these...
+            continue;
+        }
+        _filteredTypeIds.insert(id);
+    }
+}
+
 PxrUsdMayaJobImportArgs::PxrUsdMayaJobImportArgs(
     const VtDictionary& userArgs,
     const bool importWithProxyShapes,

third_party/maya/lib/usdMaya/jobArgs.h

@@ -34,8 +34,11 @@
 #include "pxr/base/tf/token.h"
 #include "pxr/usd/sdf/path.h"
 
+#include <maya/MString.h>
+
 #include <map>
 #include <ostream>
+#include <set>
 #include <string>
 #include <vector>
 
@@ -174,12 +177,33 @@ struct PxrUsdMayaJobExportArgs
     PXRUSDMAYA_API
     static const VtDictionary& GetDefaultDictionary();
 
+    /// Adds type name to filter out during export. This will also add all
+    /// inherited types (so if you exclude "constraint", it will also exclude
+    /// "parentConstraint")
+    PXRUSDMAYA_API
+    void AddFilteredTypeName(const MString& typeName);
+
+    const std::set<unsigned int>& GetFilteredTypeIds() const {
+        return _filteredTypeIds;
+    }
+
+    void ClearFilteredTypeIds() {
+        _filteredTypeIds.clear();
+    }
+
 private:
     PXRUSDMAYA_API
     PxrUsdMayaJobExportArgs(
         const VtDictionary& userArgs,
         const PxrUsdMayaUtil::ShapeSet& dagPaths,
         const GfInterval& timeInterval);
+
+    // Maya type ids to avoid exporting; these are
+    // EXACT types, though the only exposed way to modify this,
+    // AddFilteredTypeName, will also add all inherited types
+    // (so if you exclude "constraint", it will also exclude
+    // "parentConstraint")
+    std::set<unsigned int> _filteredTypeIds;
 };
 
 PXRUSDMAYA_API