Python: Automatically conform to PEP440 for version numbers. ported from Unicorn Python binding

bindings/python/setup.py

@@ -14,7 +14,6 @@ from distutils.command.sdist import sdist
 from setuptools.command.bdist_egg import bdist_egg
 
 SYSTEM = sys.platform
-VERSION = '4.0.0'
 
 # adapted from commit e504b81 of Nguyen Tan Cong
 # Reference: https://docs.python.org/2/library/platform.html#cross-platform
@@ -27,6 +26,36 @@ HEADERS_DIR = os.path.join(ROOT_DIR, 'capstone', 'include')
 SRC_DIR = os.path.join(ROOT_DIR, 'src')
 BUILD_DIR = SRC_DIR if os.path.exists(SRC_DIR) else os.path.join(ROOT_DIR, '../..')
 
+# Parse version from pkgconfig.mk
+VERSION_DATA = {}
+with open(os.path.join(BUILD_DIR, 'pkgconfig.mk')) as fp:
+    lines = fp.readlines()
+    for line in lines:
+        line = line.strip()
+        if len(line) == 0:
+            continue
+        if line.startswith('#'):
+            continue
+        if '=' not in line:
+            continue
+
+        k, v = line.split('=', 1)
+        k = k.strip()
+        v = v.strip()
+        if len(k) == 0 or len(v) == 0:
+            continue
+        VERSION_DATA[k] = v
+
+if 'PKG_MAJOR' not in VERSION_DATA or \
+        'PKG_MINOR' not in VERSION_DATA or \
+        'PKG_EXTRA' not in VERSION_DATA:
+    raise Exception("Malformed pkgconfig.mk")
+
+if 'PKG_TAG' in VERSION_DATA:
+    VERSION = '{PKG_MAJOR}.{PKG_MINOR}.{PKG_EXTRA}.{PKG_TAG}'.format(**VERSION_DATA)
+else:
+    VERSION = '{PKG_MAJOR}.{PKG_MINOR}.{PKG_EXTRA}'.format(**VERSION_DATA)
+
 if SYSTEM == 'darwin':
     VERSIONED_LIBRARY_FILE = "libcapstone.4.dylib"
     LIBRARY_FILE = "libcapstone.dylib"
@@ -69,6 +98,7 @@ def copy_sources():
     src.extend(glob.glob(os.path.join(BUILD_DIR, "RELEASE_NOTES")))
     src.extend(glob.glob(os.path.join(BUILD_DIR, "make.sh")))
     src.extend(glob.glob(os.path.join(BUILD_DIR, "CMakeLists.txt")))
+    src.extend(glob.glob(os.path.join(BUILD_DIR, "pkgconfig.mk")))
 
     for filename in src:
         outpath = os.path.join(SRC_DIR, os.path.basename(filename))

pkgconfig.mk

@@ -6,4 +6,7 @@ PKG_MAJOR = 4
 PKG_MINOR = 0
 
 # version bugfix level. Example: PKG_EXTRA = 1
-PKG_EXTRA =
+PKG_EXTRA = 0
+
+# version tag. Examples: rc1, b2, post1
+PKG_TAG = rc1