new module ECMSourceVersionControlv5.63.0-rc2v5.63.0-rc1v5.63.0

Summary:
simply sets a variable when the source is under version control. use it to
auto-enable Debug builds. there are also plans to switch special assertion
logic on in KIO when used from git, so there definitely is a more generic
use case of wanting to control behavior based on whether it the source is
likely used to make a development or production build.

conceivably the module could be used in the future to get git rev-parse or
the like, hence the generic name.

Test Plan: with .git the var is true, without it is false

Reviewers: kde-buildsystem, dfaure

Reviewed By: dfaure

Subscribers: apol, kossebau, kde-frameworks-devel

Tags: #frameworks, #build_system

Differential Revision: https://phabricator.kde.org/D24159

1 files changed, 46 insertions, 0 deletions

diff --git a/modules/ECMSourceVersionControl.cmake b/modules/ECMSourceVersionControl.cmake
new file mode 100644
index 00000000..c792ef91
--- /dev/null
+++ b/modules/ECMSourceVersionControl.cmake
@@ -0,0 +1,46 @@
+#.rst:
+# ECMSourceVersionControl
+# --------------------------
+#
+# Tries to determine whether the source is under version control (git clone,
+# svn checkout, etc).
+#
+# ``ECM_SOURCE_UNDER_VERSION_CONTROL`` is set when indication is found that
+# CMAKE_SOURCE_DIR is under version control.
+#
+# Since 5.63
+
+#=============================================================================
+# Copyright 2019 Harald Sitter <sitter@kde.org>
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions
+# are met:
+#
+# 1. Redistributions of source code must retain the copyright
+#    notice, this list of conditions and the following disclaimer.
+# 2. Redistributions in binary form must reproduce the copyright
+#    notice, this list of conditions and the following disclaimer in the
+#    documentation and/or other materials provided with the distribution.
+# 3. The name of the author may not be used to endorse or promote products
+#    derived from this software without specific prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+# IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+# OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+# IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+# INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+# NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+# THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+if(EXISTS "${CMAKE_SOURCE_DIR}/.git" OR
+   EXISTS "${CMAKE_SOURCE_DIR}/.svn" OR
+   EXISTS "${CMAKE_SOURCE_DIR}/.hg" OR
+   EXISTS "${CMAKE_SOURCE_DIR}/.bzr")
+    set(ECM_SOURCE_UNDER_VERSION_CONTROL TRUE)
+else()
+    set(ECM_SOURCE_UNDER_VERSION_CONTROL FALSE)
+endif()