From c3e48e63a2d2deeae6205ee746cc00c960c8c5c5 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Tim-Philipp=20M=C3=BCller?= <tim@centricular.com>
Date: Wed, 23 Sep 2020 19:27:34 +0100
Subject: [PATCH] meson: extract meson version from cairo-version.h

Same as autotools does. Arguably it would be better to do
it the other way round and generate cairo-version.h from
the version in meson.build or configure.ac but for now
let's do this so it's at least in sync with the autotools
build and only one file has to be edited for releases.
---
 Makefile.am |  1 +
 meson.build |  2 +-
 version.py  | 31 +++++++++++++++++++++++++++++++
 3 files changed, 33 insertions(+), 1 deletion(-)
 create mode 100755 version.py

diff --git a/Makefile.am b/Makefile.am
index 7354c3e2e..3ad73fed7 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -56,6 +56,7 @@ EXTRA_DIST += \
 EXTRA_DIST += \
 	meson.build \
 	meson_options.txt \
+	version.py \
 	boilerplate/make-cairo-boilerplate-constructors.py \
 	boilerplate/meson.build \
 	src/meson.build \
diff --git a/meson.build b/meson.build
index 8ea73bee4..111edd099 100644
--- a/meson.build
+++ b/meson.build
@@ -1,6 +1,6 @@
 project('cairo', 'c', 'cpp',
   meson_version: '>= 0.54.0',
-  version: '1.17.3',
+  version: run_command(find_program('version.py'), check: true).stdout().strip(),
 )
 
 cc = meson.get_compiler('c')
diff --git a/version.py b/version.py
new file mode 100755
index 000000000..3b663abed
--- /dev/null
+++ b/version.py
@@ -0,0 +1,31 @@
+#!/usr/bin/env python3
+#
+# cairo version.py
+#
+# Extracts the version from cairo-version.h for the meson build files.
+#
+import os
+import sys
+
+if __name__ == '__main__':
+    srcroot = os.path.dirname(__file__)
+
+    version_major = None
+    version_minor = None
+    version_micro = None
+
+    f = open(os.path.join(srcroot, 'src', 'cairo-version.h'), 'r')
+    for line in f:
+        if line.startswith('#define CAIRO_VERSION_MAJOR '):
+            version_major = line[28:].strip()
+        if line.startswith('#define CAIRO_VERSION_MINOR '):
+            version_minor = line[28:].strip()
+        if line.startswith('#define CAIRO_VERSION_MICRO '):
+            version_micro = line[28:].strip()
+    f.close()
+
+    if not (version_major and version_minor and version_micro):
+       print('ERROR: Could not extract cairo version from cairo-version.h in', srcroot, file=sys.stderr)
+       sys.exit(-1)
+
+    print('{0}.{1}.{2}'.format(version_major, version_minor, version_micro))