From e2a49afe3edce5b96b8f0ccd2d4095f34a92847a Mon Sep 17 00:00:00 2001
From: Nick Wellnhofer <wellnhofer@aevum.de>
Date: Wed, 3 Jul 2024 20:18:24 +0200
Subject: [PATCH] build: Read version number from VERSION file

---
 CMakeLists.txt | 16 +++++++---------
 MAINTAINERS.md |  3 +--
 VERSION        |  1 +
 configure.ac   | 14 ++++++--------
 meson.build    |  2 +-
 5 files changed, 16 insertions(+), 20 deletions(-)
 create mode 100644 VERSION

diff --git a/CMakeLists.txt b/CMakeLists.txt
index d044a0d2..3d8f4151 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -1,14 +1,12 @@
 cmake_minimum_required(VERSION 3.18)
 
-file(STRINGS "configure.ac" CONFIGURE_AC_LINES)
-foreach(line ${CONFIGURE_AC_LINES})
-    if(line MATCHES [[^m4_define\(\[(MAJOR_VERSION|MINOR_VERSION|MICRO_VERSION)\],[ \t]*([0-9]+)\)$]])
-        set(LIBXML_${CMAKE_MATCH_1} ${CMAKE_MATCH_2})
-    elseif(line MATCHES "^(LIBXML_MAJOR_VERSION|LIBXML_MINOR_VERSION|LIBXML_MICRO_VERSION)=([0-9]+)$")
-        set(${CMAKE_MATCH_1} ${CMAKE_MATCH_2})
-    endif()
-endforeach()
-set(VERSION "${LIBXML_MAJOR_VERSION}.${LIBXML_MINOR_VERSION}.${LIBXML_MICRO_VERSION}")
+file(READ "VERSION" VERSION)
+string(STRIP ${VERSION} VERSION)
+if(${VERSION} MATCHES [[([0-9]+)\.([0-9]+)\.([0-9]+)]])
+    set(LIBXML_MAJOR_VERSION ${CMAKE_MATCH_1})
+    set(LIBXML_MINOR_VERSION ${CMAKE_MATCH_2})
+    set(LIBXML_MICRO_VERSION ${CMAKE_MATCH_3})
+endif()
 
 project(libxml2 VERSION ${VERSION} LANGUAGES C)
 
diff --git a/MAINTAINERS.md b/MAINTAINERS.md
index 5a79c9b1..b2806755 100644
--- a/MAINTAINERS.md
+++ b/MAINTAINERS.md
@@ -50,8 +50,7 @@ You can get started by running
 
 ### Bump the version number
 
-Edit the version numbers in `configure.ac` and `meson.build` if you
-haven't done so already.
+Update the version number in `VERSION` if you haven't done so already.
 
 ### Build the tarball
 
diff --git a/VERSION b/VERSION
new file mode 100644
index 00000000..edcfe40d
--- /dev/null
+++ b/VERSION
@@ -0,0 +1 @@
+2.14.0
diff --git a/configure.ac b/configure.ac
index 84769448..2169f78a 100644
--- a/configure.ac
+++ b/configure.ac
@@ -1,21 +1,19 @@
 dnl Process this file with autoconf to produce a configure script.
 AC_PREREQ([2.63])
 
-m4_define([MAJOR_VERSION], 2)
-m4_define([MINOR_VERSION], 14)
-m4_define([MICRO_VERSION], 0)
+m4_define([version_macro], m4_normalize(m4_include([VERSION])))
 
-AC_INIT([libxml2],[MAJOR_VERSION.MINOR_VERSION.MICRO_VERSION])
+AC_INIT([libxml2],[version_macro])
 AC_CONFIG_SRCDIR([entities.c])
 AC_CONFIG_HEADERS([config.h])
 AC_CONFIG_MACRO_DIR([m4])
 AC_CANONICAL_HOST
 
-LIBXML_MAJOR_VERSION=MAJOR_VERSION
-LIBXML_MINOR_VERSION=MINOR_VERSION
-LIBXML_MICRO_VERSION=MICRO_VERSION
+LIBXML_VERSION=version_macro
+LIBXML_MAJOR_VERSION=`echo $LIBXML_VERSION | cut -d . -f 1`
+LIBXML_MINOR_VERSION=`echo $LIBXML_VERSION | cut -d . -f 2`
+LIBXML_MICRO_VERSION=`echo $LIBXML_VERSION | cut -d . -f 3`
 LIBXML_MICRO_VERSION_SUFFIX=
-LIBXML_VERSION=$LIBXML_MAJOR_VERSION.$LIBXML_MINOR_VERSION.$LIBXML_MICRO_VERSION$LIBXML_MICRO_VERSION_SUFFIX
 
 # The oldest minor version we are compatible with.
 LIBXML_MINOR_COMPAT=0
diff --git a/meson.build b/meson.build
index 3b7747f6..b39e86a6 100644
--- a/meson.build
+++ b/meson.build
@@ -1,7 +1,7 @@
 project(
     'libxml2',
     'c',
-    version: '2.13.0',
+    version: files('VERSION'),
     license: 'MIT',
     default_options: ['buildtype=debug', 'warning_level=3'],
     meson_version: '>= 0.61',