Allow server to be configured

- Transform the server from Flask app to regular Python script
- Add an option  for parsing an external configuration file

gakeshadeba.py

@@ -38,7 +38,6 @@ class Gakeshadeba():
                 entry = {
                     "sha512": file_sha512,
                     "software_url": sr,
-                    # Should be flexible
                     "software_root": sr_el["software_root"],
                     "multiarch": sr_el["multiarch"],
                     "os": sr_el["os"],
@@ -71,6 +70,7 @@ class Gakeshadeba():
 
     def find_file_cache_entry(self, sha512):
         file_name = self.file_sha512_dir.get(sha512)
+
         if file_name:
             return file_name
         else:

server.py

+import argparse
+import configparser
+
 from flask import Flask, send_from_directory
 from gakeshadeba import Gakeshadeba
 
-content_dir = "./files"
+parser = argparse.ArgumentParser(
+    prog = "Gakeshadeba Server",
+    description = "Simple ShaCache and ShaDir implementation in plain Python"
+)
+parser.add_argument("-c", "--cfg", required=True)
+argv = parser.parse_args()
+
+config = configparser.ConfigParser()
+config.read(argv.cfg)
 
-gsha = Gakeshadeba("./files", "./sr_list.json")
-gsha.set_signing_key("tmp.key")
+gsha = Gakeshadeba(config["gakeshadeba"]["content_directory"], config["gakeshadeba"]["sr_list_path"])
+gsha.set_signing_key(config["gakeshadeba"]["signing_key_path"])
 gsha.build_file_cache()
 gsha.build_sr_dir()
 
@@ -20,5 +31,7 @@ def binary_cache(sha512):
     if file_name is None:
         return "Not found\n", 404
 
-    return send_from_directory(content_dir, file_name, as_attachment=True)
+    return send_from_directory(config["gakeshadeba"]["content_directory"], file_name, as_attachment=True)
+
+app.run(host=config["server"]["host"], port=config["server"]["port"])