In commit v3.12.0-rc1~136^2 (CPack: Use project version as default for
`CPACK_PACKAGE_VERSION`, 2018-04-29) we did not account for the value of
`CMAKE_PROJECT_VERSION_{MAJOR,MINOR,PATCH}` having `0`. Fix the logic
to distinguish between unprovided version components and `0` components.
While at it, add a test case covering the behavior described in the
documentation by the original commit. The number of version components
in the package name should match those provided to the `project()`
command `VERSION` option.
Fixes: #18199
CMake Tests Directory
*********************
This directory contains the CMake test suite.
See also the `CMake Source Code Guide`_.
.. _`CMake Source Code Guide`: ../Help/dev/source.rst
Many tests exist as immediate subdirectories, but some tests
are organized as follows.
* ``CMakeLib/``:
Source code, used for tests, that links to the ``CMakeLib`` library
defined over in ``Source/``.
* ``CMakeOnly/``:
Deprecated. Tests that run CMake to generate a project but not build it.
Superseded by ``Tests/RunCMake/``.
* ``Find*/``:
Tests for specific find modules that can only be run on machines with
the corresponding packages installed. They are enabled in
``CMakeLists.txt`` by undocumented options used on CI builds.
* ``Module/``:
Tests for specific CMake modules.
* ``RunCMake/``:
Tests that run CMake and/or other tools while precisely checking
their return code and stdout/stderr content. Useful for testing
error cases and diagnostic output.
Brad King
ed015bde2b