Add a script to generate a clean config file (#4315)

scripts/generate_config

@@ -0,0 +1,67 @@
+#!/usr/bin/env python
+
+import argparse
+import sys
+
+from synapse.config.homeserver import HomeServerConfig
+
+if __name__ == "__main__":
+    parser = argparse.ArgumentParser()
+    parser.add_argument(
+        "--config-dir",
+        default="CONFDIR",
+
+        help="The path where the config files are kept. Used to create filenames for "
+             "things like the log config and the signing key. Default: %(default)s",
+    )
+
+    parser.add_argument(
+        "--data-dir",
+        default="DATADIR",
+        help="The path where the data files are kept. Used to create filenames for "
+             "things like the database and media store. Default: %(default)s",
+    )
+
+    parser.add_argument(
+        "--server-name",
+        default="SERVERNAME",
+        help="The server name. Used to initialise the server_name config param, but also "
+             "used in the names of some of the config files. Default: %(default)s",
+    )
+
+    parser.add_argument(
+        "--report-stats",
+        action="store",
+        help="Whether the generated config reports anonymized usage statistics",
+        choices=["yes", "no"],
+    )
+
+    parser.add_argument(
+        "--generate-secrets",
+        action="store_true",
+        help="Enable generation of new secrets for things like the macaroon_secret_key."
+             "By default, these parameters will be left unset."
+    )
+
+    parser.add_argument(
+        "-o", "--output-file",
+        type=argparse.FileType('w'),
+        default=sys.stdout,
+        help="File to write the configuration to. Default: stdout",
+    )
+
+    args = parser.parse_args()
+
+    report_stats = args.report_stats
+    if report_stats is not None:
+        report_stats = report_stats == "yes"
+
+    conf = HomeServerConfig().generate_config(
+        config_dir_path=args.config_dir,
+        data_dir_path=args.data_dir,
+        server_name=args.server_name,
+        generate_secrets=args.generate_secrets,
+        report_stats=report_stats,
+    )
+
+    args.output_file.write(conf)