CPack/DragNDrop: Support CPACK_DMG_<component>_FILE_NAME

Help/cpack_gen/dmg.rst

@@ -81,6 +81,13 @@ on macOS:
   ``<language>.menu.txt`` and ``<language>.license.txt`` in the directory
   specified by the :variable:`CPACK_DMG_SLA_DIR` variable.
 
+.. variable:: CPACK_DMG_<component>_FILE_NAME
+
+ File name when packaging ``<component>`` as its own DMG
+ (``CPACK_COMPONENTS_GROUPING`` set to IGNORE).
+
+ - Default: ``CPACK_PACKAGE_FILE_NAME-<component>``
+
 .. variable:: CPACK_COMMAND_HDIUTIL
 
  Path to the ``hdiutil(1)`` command used to operate on disk image files on

Help/release/dev/custom-dmg-names.rst

@@ -0,0 +1,7 @@
+custom-dmg-names
+----------------
+
+* The :cpack_gen:`CPack DragNDrop Generator` learned to use
+  the :variable:`CPACK_DMG_<component>_FILE_NAME` variable
+  to set a custom filename when packaging components into
+  their own DMGs.

Source/CPack/cmCPackDragNDropGenerator.cxx

@@ -775,6 +775,11 @@ std::string cmCPackDragNDropGenerator::GetComponentInstallDirNameSuffix(
     }
   }
 
+  std::string componentFileName =
+    "CPACK_DMG_" + cmSystemTools::UpperCase(componentName) + "_FILE_NAME";
+  if (this->IsSet(componentFileName)) {
+    return this->GetOption(componentFileName);
+  }
   return GetComponentPackageFileName(package_file_name, componentName, false);
 }
 

Tests/RunCMake/CPack/RunCMakeTest.cmake

@@ -5,7 +5,7 @@ include("${RunCMake_SOURCE_DIR}/CPackTestHelpers.cmake")
 
 # run_cpack_test args: TEST_NAME "GENERATORS" RUN_CMAKE_BUILD_STEP "PACKAGING_TYPES"
 run_cpack_test(CUSTOM_BINARY_SPEC_FILE "RPM.CUSTOM_BINARY_SPEC_FILE" false "MONOLITHIC;COMPONENT")
-run_cpack_test(CUSTOM_NAMES "RPM.CUSTOM_NAMES;DEB.CUSTOM_NAMES;TGZ" true "COMPONENT")
+run_cpack_test(CUSTOM_NAMES "RPM.CUSTOM_NAMES;DEB.CUSTOM_NAMES;TGZ;DragNDrop" true "COMPONENT")
 run_cpack_test(DEBUGINFO "RPM.DEBUGINFO;DEB.DEBUGINFO" true "COMPONENT")
 run_cpack_test_subtests(DEFAULT_PERMISSIONS "CMAKE_var_set;CPACK_var_set;both_set;invalid_CMAKE_var;invalid_CPACK_var" "RPM.DEFAULT_PERMISSIONS;DEB.DEFAULT_PERMISSIONS" false "MONOLITHIC;COMPONENT")
 run_cpack_test(DEPENDENCIES "RPM.DEPENDENCIES;DEB.DEPENDENCIES" true "COMPONENT")

Tests/RunCMake/CPack/tests/CUSTOM_NAMES/ExpectedFiles.cmake

@@ -12,4 +12,7 @@ if(GENERATOR_TYPE STREQUAL "DEB" OR GENERATOR_TYPE STREQUAL "RPM")
 elseif(GENERATOR_TYPE STREQUAL "TGZ")
   set(EXPECTED_FILE_2 "second.tar.gz")
   set(EXPECTED_FILE_3 "pkg_3_abc.tar.gz")
+elseif(GENERATOR_TYPE STREQUAL "DragNDrop")
+  set(EXPECTED_FILE_2 "second.dmg")
+  set(EXPECTED_FILE_3 "pkg_3_abc.dmg")
 endif()

Tests/RunCMake/CPack/tests/CUSTOM_NAMES/test.cmake

@@ -10,6 +10,9 @@ if(GENERATOR_TYPE STREQUAL "DEB" OR GENERATOR_TYPE STREQUAL "RPM")
 elseif(GENERATOR_TYPE STREQUAL "TGZ")
   set(CPACK_ARCHIVE_PKG_2_FILE_NAME "second")
   set(CPACK_ARCHIVE_PKG_3_FILE_NAME "pkg_3_abc")
+elseif(GENERATOR_TYPE STREQUAL "DragNDrop")
+  set(CPACK_DMG_PKG_2_FILE_NAME "second")
+  set(CPACK_DMG_PKG_3_FILE_NAME "pkg_3_abc")
 endif()
 
 install(FILES CMakeLists.txt DESTINATION foo COMPONENT pkg_1)