scripts: Convert qemu-version.sh to qemu-version.py

The sh script are harder to maintain for compatible different
xsh environment so convert it to python script
Also incorporate the fixes in
https://patchew.org/QEMU/[email protected]/

According to msys2/MSYS2-packages#2176
We need use CYGWIN=noglob and MSYS=noglob in the environment variable
for disable wildcard expanding in msys or cygwin git, and setting the shell=False

Signed-off-by: Yonggang Luo <[email protected]>
Message-Id: <[email protected]>
Signed-off-by: Paolo Bonzini <[email protected]>

meson.build

@@ -2572,7 +2572,7 @@ tracetool_depends = files(
   'scripts/tracetool/vcpu.py'
 )
 
-qemu_version_cmd = [find_program('scripts/qemu-version.sh'),
+qemu_version_cmd = [find_program('scripts/qemu-version.py'),
                     meson.current_source_dir(),
                     config_host['PKGVERSION'], meson.project_version()]
 qemu_version = custom_target('qemu-version.h',

scripts/qemu-version.py

@@ -0,0 +1,37 @@
+#!/usr/bin/env python3
+
+#
+# Script for retrieve qemu git version information
+#
+# Authors:
+#  Yonggang Luo <[email protected]>
+#
+# This work is licensed under the terms of the GNU GPL, version 2.1
+# or, at your option, any later version. See the COPYING file in
+# the top-level directory.
+
+import sys
+import subprocess
+import os
+import os.path
+
+def main(_program, dir, pkgversion, version, *unused):
+    os.chdir(dir)
+    if not pkgversion and os.path.exists('.git'):
+        pc = subprocess.run(
+            ['git', 'describe', '--match', 'v*', '--dirty', '--always'],
+            env=dict(os.environ, CYGWIN="noglob", MSYS='noglob'),
+            stdout=subprocess.PIPE, stderr=subprocess.DEVNULL,
+            encoding='utf8', shell=False)
+        if pc.returncode == 0:
+            pkgversion = pc.stdout.strip()
+
+    fullversion = version
+    if pkgversion:
+        fullversion = "{} ({})".format(version, pkgversion)
+
+    print('#define QEMU_PKGVERSION "%s"' % pkgversion)
+    print('#define QEMU_FULL_VERSION "%s"' % fullversion)
+
+if __name__ == "__main__":
+    main(*sys.argv)