CPack/DMG: Do not use CPACK_RESOURCE_FILE_LICENSE for SLA by default

Since macOS 12.0 deprecated the tools needed to attach a SLA to a
`.dmg`, we should no longer do this by default.  Add a policy to
change the default to off.

Fixes: #22978

1 files changed, 32 insertions, 0 deletions

diff --git a/Help/policy/CMP0133.rst b/Help/policy/CMP0133.rst
new file mode 100644
index 0000000000..c19bcf9be1
--- /dev/null
+++ b/Help/policy/CMP0133.rst
@@ -0,0 +1,32 @@
+CMP0133
+-------
+
+.. versionadded:: 3.24
+
+The :module:`CPack` module disables SLA by default in the
+:cpack_gen:`CPack DragNDrop Generator`.
+
+The :cpack_gen:`CPack DragNDrop Generator` in CMake 3.22 and below attach a
+Software License Agreement (SLA) to ``.dmg`` files using the file specified
+by :variable:`CPACK_RESOURCE_FILE_LICENSE`, if set to a non-default value.
+macOS 12.0 deprecated the tools used to do this, so CMake 3.23 added
+the :variable:`CPACK_DMG_SLA_USE_RESOURCE_FILE_LICENSE` option to
+control the behavior.  CMake 3.23 enables that option by default for
+compatibility with older versions. CMake 3.24 and above prefer to *not*
+enable the :variable:`CPACK_DMG_SLA_USE_RESOURCE_FILE_LICENSE` option by
+default. This policy provides compatibility with projects that have not
+been updated to account for the lack of a SLA in their ``.dmg`` packages.
+
+The ``OLD`` behavior for this policy is to enable
+:variable:`CPACK_DMG_SLA_USE_RESOURCE_FILE_LICENSE` by default.
+The ``NEW`` behavior for this policy is to not enable it by default.
+
+This policy was introduced in CMake version 3.24.  Use the
+:command:`cmake_policy` command to set this policy to ``OLD`` or ``NEW``
+explicitly. Unlike many policies, CMake version |release| does *not* warn
+by default when this policy is not set and simply uses ``OLD`` behavior.
+See documentation of the
+:variable:`CMAKE_POLICY_WARNING_CMP0133 <CMAKE_POLICY_WARNING_CMP<NNNN>>`
+variable to control the warning.
+
+.. include:: DEPRECATED.txt