meson: Add script to use VERSION file for getting version

Meson has up until this point set it's version in the root meson.build
script, while the other build systems read the VERSION file. This is
just "one more thing" to duplicate between meson and every other build
system. This script is a simple "read, strip, print" sort of deal to
allow meson to read the VERSION file.

I chose to implement this in python since python is portable, and to
keep the meson.build script clean. This is also complicated by the fact
that the project() call *must* be the first non-comment,non-blank in the
toplevel meson.build script.

v2: - Move from scripts/ to bin/
    - use python explicitly to run the scripts to support windows

Signed-off-by: Dylan Baker <[email protected]>
Reviewed-by: Eric Engestrom <[email protected]>

2 files changed, 38 insertions, 1 deletions

diff --git a/bin/meson_get_version.py b/bin/meson_get_version.py
new file mode 100644
index 00000000000..a221e26f250
--- /dev/null
+++ b/bin/meson_get_version.py
@@ -0,0 +1,35 @@
+#!/usr/bin/env python
+# encoding=utf-8
+# Copyright © 2017 Intel Corporation
+
+# Permission is hereby granted, free of charge, to any person obtaining a copy
+# of this software and associated documentation files (the "Software"), to deal
+# in the Software without restriction, including without limitation the rights
+# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+# copies of the Software, and to permit persons to whom the Software is
+# furnished to do so, subject to the following conditions:
+
+# The above copyright notice and this permission notice shall be included in
+# all copies or substantial portions of the Software.
+
+# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+# SOFTWARE.
+
+from __future__ import print_function
+import os
+
+
+def main():
+    filename = os.path.join(os.environ['MESON_SOURCE_ROOT'], 'VERSION')
+    with open(filename) as f:
+        version = f.read().strip()
+    print(version, end='')
+
+
+if __name__ == '__main__':
+    main()
diff --git a/meson.build b/meson.build
index ddd76804c54..51d19c02b80 100644
--- a/meson.build
+++ b/meson.build
@@ -21,7 +21,9 @@
 project(
   'mesa',
   ['c', 'cpp'],
-  version : '17.3.0-devel',
+  version : run_command(
+    [find_program('python', 'python2', 'python3'), 'bin/meson_get_version.py']
+  ).stdout(),
   license : 'MIT',
   meson_version : '>= 0.42',
   default_options : ['buildtype=debugoptimized', 'c_std=c99', 'cpp_std=c++11']