From bce291439c4094e1be37a51bfc0c986fa0b03410 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Edgar=20Fu=C3=9F?= <ef@math.uni-bonn.de>
Date: Fri, 15 Jan 2021 17:41:49 +0100
Subject: [PATCH] Avoid name clashes on case-insensitive file systems

On case-insensitive file systems (i.e. macOS), the VERSION file collides with the Boost-provided version file on #include <version>.

Work around by re-naming VERSION to ICINGA2_VERSION.
---
 CMakeLists.txt             | 6 +++---
 VERSION => ICINGA2_VERSION | 0
 RELEASE.md                 | 2 +-
 doc/21-development.md      | 2 +-
 4 files changed, 5 insertions(+), 5 deletions(-)
 rename VERSION => ICINGA2_VERSION (100%)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 47df384c9..3f59d46f4 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -89,7 +89,7 @@ file(READ "${CMAKE_CURRENT_SOURCE_DIR}/COPYING" ICINGA2_LICENSE_GPL)
 set(ICINGA2_LICENSE "${ICINGA2_LICENSE_GPL}\n\n---\n\n${ICINGA2_LICENSE_ADDITIONS}")
 file(WRITE "${CMAKE_CURRENT_BINARY_DIR}/LICENSE.txt" ${ICINGA2_LICENSE})
 
-file(STRINGS VERSION SPEC_VERSION REGEX "^Version:")
+file(STRINGS ICINGA2_VERSION SPEC_VERSION REGEX "^Version:")
 string(LENGTH "${SPEC_VERSION}" SPEC_VERSION_LENGTH)
 math(EXPR SPEC_VERSION_LENGTH "${SPEC_VERSION_LENGTH} - 9")
 string(SUBSTRING ${SPEC_VERSION} 9 ${SPEC_VERSION_LENGTH} SPEC_VERSION)
@@ -102,7 +102,7 @@ if(EXISTS ${CMAKE_CURRENT_SOURCE_DIR}/icinga-version.h.force)
   configure_file(icinga-version.h.force ${CMAKE_CURRENT_BINARY_DIR}/icinga-version.h COPYONLY)
 else()
   if(NOT ICINGA2_GIT_VERSION_INFO OR GIT_VERSION MATCHES "-NOTFOUND$")
-    file(STRINGS VERSION SPEC_REVISION REGEX "^Revision: ")
+    file(STRINGS ICINGA2_VERSION SPEC_REVISION REGEX "^Revision: ")
     string(LENGTH "${SPEC_REVISION}" SPEC_REVISION_LENGTH)
     math(EXPR SPEC_REVISION_LENGTH "${SPEC_REVISION_LENGTH} - 10")
     string(SUBSTRING ${SPEC_REVISION} 10 ${SPEC_REVISION_LENGTH} SPEC_REVISION)
@@ -536,4 +536,4 @@ if(WIN32)
   )
 endif()
 
-include(CPack)
\ No newline at end of file
+include(CPack)
diff --git a/VERSION b/ICINGA2_VERSION
similarity index 100%
rename from VERSION
rename to ICINGA2_VERSION
diff --git a/RELEASE.md b/RELEASE.md
index dfae94faf..3db79ad4a 100644
--- a/RELEASE.md
+++ b/RELEASE.md
@@ -64,7 +64,7 @@ git log --use-mailmap | grep '^Author:' | cut -f2- -d' ' | sort -f | uniq > AUTH
 Update the version:
 
 ```
-sed -i "s/Version: .*/Version: $VERSION/g" VERSION
+sed -i "s/Version: .*/Version: $VERSION/g" ICINGA2_VERSION
 ```
 
 ## Changelog <a id="changelog"></a>
diff --git a/doc/21-development.md b/doc/21-development.md
index 034f054ff..d6f189736 100644
--- a/doc/21-development.md
+++ b/doc/21-development.md
@@ -2342,7 +2342,7 @@ for implementation details.
 
 CMake determines the Icinga 2 version number using `git describe` if the
 source directory is contained in a Git repository. Otherwise the version number
-is extracted from the [VERSION](VERSION) file. This behavior can be
+is extracted from the [ICINGA2_VERSION](ICINGA2_VERSION) file. This behavior can be
 overridden by creating a file called `icinga-version.h.force` in the source
 directory. Alternatively the `-DICINGA2_GIT_VERSION_INFO=OFF` option for CMake
 can be used to disable the usage of `git describe`.