From 8d92e3561725148d0447dff7a9330e239f8d0f98 Mon Sep 17 00:00:00 2001
From: Tristan Gingold <tgingold@free.fr>
Date: Fri, 21 Jun 2019 20:25:44 +0200
Subject: setup.py: rework version extraction.

---
 python/libghdl/__init__.py |  2 +-
 python/setup.py            | 38 ++++++++++++++++++++++++++++++++++++--
 2 files changed, 37 insertions(+), 3 deletions(-)

diff --git a/python/libghdl/__init__.py b/python/libghdl/__init__.py
index 8735bf666..a733cd1a8 100644
--- a/python/libghdl/__init__.py
+++ b/python/libghdl/__init__.py
@@ -33,7 +33,7 @@ def _check_libghdl_bindir(bindir, basename):
 
 def _get_libghdl_path():
     """Locate the directory where the shared library is"""
-    basename = get_libghdl_name()
+    basename = _get_libghdl_name()
     # Try VUNIT_GHDL_PATH (path of the ghdl binary when using VUnit).
     r = _check_libghdl_bindir (os.environ.get('VUNIT_GHDL_PATH'), basename)
     if r is not None:
diff --git a/python/setup.py b/python/setup.py
index e75e37b84..4d9dc5c41 100644
--- a/python/setup.py
+++ b/python/setup.py
@@ -1,11 +1,42 @@
 #!/usr/bin/env python
 
+import distutils.command.build_py
 from distutils.core import setup
-from libghdl.config import __version__
+import re
+
+def get_version():
+    # Try from config.py.  Reads it to avoid to load the shared library.
+    r = re.compile("^__version__ = '(.*)'\n")
+    try:
+        l = open('libghdl/config.py').read()
+        m = r.match(l)
+        if m:
+            return m.group(1)
+    except:
+        pass
+    # Try to extract from configure
+    r = re.compile('^ghdl_version="(.*)"')
+    try:
+        for l in open('../configure').readlines():
+            m = r.match(l)
+            if m:
+                return m.group(1)
+    except:
+        pass
+    raise Exception("Cannot find version")
+
+# Extract the version now, as setup() may change the current directory.
+version=get_version()
+
+class MyBuildPy(distutils.command.build_py.build_py):
+    def run(self):
+        with open('libghdl/config.py', 'w') as f:
+            f.write("__version__ = '{}'\n".format(version))
+        super(MyBuildPy, self).run()
 
 setup(
     name='libghdl',
-    version=__version__,
+    version=version,
     description='Interface to ghdl, a VHDL analyzer',
     long_description="""GHDL is a vhdl simulator and libghdl provides a low-level
 interface to the parser. This library gives access to the AST so that you can
@@ -15,6 +46,9 @@ write tools like linters.
     author_email='tgingold@free.fr',
     url='http://github.com/ghdl/ghdl',
     license='GPL-2.0-or-later',
+    cmdclass={
+        'build_py': MyBuildPy
+    },
     package_dir={
         'libghdl': './libghdl'
     },
-- 
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