Add version information

docs/conf.py

@@ -14,6 +14,8 @@
 # import sys
 # sys.path.insert(0, os.path.abspath('.'))
 import subprocess, os
+import re
+from datetime import datetime
 
 def configureDoxyfile(src_dir, input_dir, output_dir, doxyfile_in, doxyfile_out):
 
@@ -26,12 +28,32 @@ def configureDoxyfile(src_dir, input_dir, output_dir, doxyfile_in, doxyfile_out)
 
 	with open(doxyfile_out, 'w') as file:
 		file.write(filedata)
+
+def get_version(src_dir):
+	cmake_file = src_dir + 'CMakeLists.txt'
 
-# -- Project information -----------------------------------------------------
+	with open(cmake_file, 'r') as f:
+		txt = f.read()
+
+    version = '0.0.0'
+    try:
+		regex = 'project\((\n|.)*?\)'
+		project_detail = re.search(regex, txt).group()
+		version_detail = re.search('VERSION.*', project_detail).group()
+		version = re.split("\s", version_detail)[-1]
+    except:
+		print(f'version not found in {cmake_file}. Use {version} as default.')  
 
-project = 'KokkosFFT'
-copyright = '2023, Yuuichi Asahi'
+    return version
+
+# -- Project information -----------------------------------------------------
 author = 'Yuuichi Asahi'
+project = 'KokkosFFT'
+copyright = f"2023-{datetime.now().year}, {author}"
+
+version = get_version('../')
+
+release = 'release'
 
 # Check if we're running on Read the Docs' servers
 read_the_docs_build = os.environ.get('READTHEDOCS', None) == 'True'