Split config file

config/parser.py

@@ -0,0 +1,79 @@
+#!/usr/bin/env python
+import sys
+import os
+import configparser
+import json
+from config.env_vars import *
+
+# Configures how to parse configuration file
+config_file_name = 'config.conf'
+config_file_full_path = os.path.join(os.path.abspath(os.path.dirname(__file__)), config_file_name)
+sys.tracebacklimit = 0  # dont show stack traces in prod mode
+config = configparser.ConfigParser()
+config.optionxform = str # maintain capitalization of config keys
+config.read(config_file_full_path)
+
+
+def config_section_map(section):
+    'Load the config file into a dictionary'
+    dict1 = {}
+    options = config.options(section)
+    for option in options:
+        try:
+            dict1[option] = config.get(section, option)
+        except:
+            print("exception on %s!" % option)
+            dict1[option] = None
+    return dict1
+
+def cast(value, type_):
+    return type_(value)
+
+def get_config_value(key, config_section, is_mandatory, datatype, default_value = None):
+    'Return for each key the corresponding value from the Docker Environment or the Config File'
+    if IS_IN_DOCKER:
+        config_value = os.environ.get(key)
+        if config_value is not None: 
+            # print(f'The value retrieved for [{config_section}]: {key} is "{config_value}"')
+            config_value = config_value
+            # return config_value
+        elif is_mandatory:
+            print(f'[ ERROR ]: Variable not specified in Docker environment: {key}' )
+            sys.exit(0)
+        else:
+            # return default_value
+            # print(f'The default value used for [{config_section}]: {key} is "{default_value}" (data type: {type(default_value).__name__})')
+            config_value = default_value
+
+    else:
+        try:
+            config_value = config_section_map(config_section).get(key)
+        except configparser.NoSectionError:
+            config_value = None
+        if config_value is not None:
+            # print(f'The value retrieved for [{config_section}]: {key} is "{config_value}"')
+            config_value = config_value  
+            # return config_value
+        elif is_mandatory:
+            print(f'[ ERROR ]: Mandatory variable not specified in config file, section [{config_section}]: {key} (data type: {datatype.__name__})')
+            sys.exit(0)
+        else:
+            # return default_value 
+            # print(f'The default value used for [{config_section}]: {key} is "{default_value}" (data type: {type(default_value).__name__})')
+            config_value = default_value
+
+    # Apply data type
+    try:
+        if datatype == bool:
+            config_value = eval(str(config_value).capitalize())
+        elif datatype == list:
+            config_value = json.loads(config_value)
+        elif config_value is not None: 
+            config_value = cast(config_value, datatype)
+    except Exception as e: 
+        print(f'[ ERROR ]: The value retrieved for [{config_section}]: {key} is "{config_value}" and cannot be converted to data type {datatype}')
+        print(e)
+        sys.exit(0)
+    return config_value    
+
+