[FEATURE] Arg to shuffle subscriptions (#1263)

Closes https://github.com/jmbannon/ytdl-sub/issues/1234

Adds `--shuffle` support which shuffles the order of subscriptions when downloading.

src/ytdl_sub/cli/entrypoint.py

@@ -1,5 +1,6 @@
 import gc
 import os
+import random
 import sys
 from datetime import datetime
 from pathlib import Path
@@ -75,6 +76,7 @@ def _download_subscriptions_from_yaml_files(
     subscription_override_dict: Dict,
     update_with_info_json: bool,
     dry_run: bool,
+    shuffle: bool,
 ) -> List[Subscription]:
     """
     Downloads all subscriptions from one or many subscription yaml files.
@@ -91,6 +93,8 @@ def _download_subscriptions_from_yaml_files(
         Whether to actually download or update using existing info json
     dry_run
         Whether to dry run or not
+    shuffle
+        Whether to shuffle the subscription download order
 
     Returns
     -------
@@ -112,6 +116,10 @@ def _download_subscriptions_from_yaml_files(
             subscription_override_dict=subscription_override_dict,
         )
 
+    if shuffle:
+        logger.info("Shuffling subscriptions")
+        random.shuffle(subscriptions)
+
     for subscription in subscriptions:
         with subscription.exception_handling():
             logger.info(
@@ -253,6 +261,7 @@ def main() -> List[Subscription]:
                 subscription_override_dict=subscription_override_dict,
                 update_with_info_json=args.update_with_info_json,
                 dry_run=args.dry_run,
+                shuffle=args.shuffle,
             )
 
         # One-off download

src/ytdl_sub/cli/parsers/main.py

@@ -172,6 +172,10 @@ class SubArguments:
         short="-o",
         long="--dl-override",
     )
+    SHUFFLE = CLIArgument(
+        short="-sh",
+        long="--shuffle",
+    )
 
 
 subscription_parser = subparsers.add_parser("sub")
@@ -197,6 +201,13 @@ subscription_parser.add_argument(
     help="override all subscription config values using `dl` syntax, "
     "i.e. --dl-override='--ytdl_options.max_downloads 3'",
 )
+subscription_parser.add_argument(
+    SubArguments.SHUFFLE.short,
+    SubArguments.SHUFFLE.long,
+    action="store_true",
+    help="shuffle subscription order when downloading",
+    default=False,
+)
 
 ###################################################################################################
 # DOWNLOAD PARSER

tests/integration/cli/test_entrypoint.py

@@ -9,6 +9,7 @@ import pytest
 
 from ytdl_sub.cli.entrypoint import _download_subscriptions_from_yaml_files
 from ytdl_sub.cli.entrypoint import main
+from ytdl_sub.config.config_file import ConfigFile
 from ytdl_sub.subscriptions.subscription import Subscription
 from ytdl_sub.utils.exceptions import ExperimentalFeatureNotEnabled
 
@@ -59,6 +60,7 @@ def test_subscription_logs_write_to_file(
                 subscription_override_dict={},
                 update_with_info_json=False,
                 dry_run=dry_run,
+                shuffle=False,
             )
         except ValueError:
             assert not mock_success_output
@@ -120,3 +122,40 @@ def test_update_with_info_json_requires_experimental_flag(
         pytest.raises(ExperimentalFeatureNotEnabled),
     ):
         _ = main()
+
+
+def test_subscription_shuffle(
+    default_config: ConfigFile,
+    mock_subscription_download_factory: Callable,
+    music_video_subscription_path: Path,
+):
+
+    subscription_paths = [str(music_video_subscription_path)]
+
+    with (
+        patch.object(
+            Subscription,
+            "download",
+            new=mock_subscription_download_factory(mock_success_output=True),
+        ),
+    ):
+        out1 = _download_subscriptions_from_yaml_files(
+            config=default_config,
+            subscription_paths=subscription_paths,
+            subscription_matches=[],
+            subscription_override_dict={},
+            update_with_info_json=False,
+            dry_run=True,
+            shuffle=True,
+        )
+        out2 = _download_subscriptions_from_yaml_files(
+            config=default_config,
+            subscription_paths=subscription_paths,
+            subscription_matches=[],
+            subscription_override_dict={},
+            update_with_info_json=False,
+            dry_run=True,
+            shuffle=True,
+        )
+
+    assert [sub.name for sub in out1] != [sub.name for sub in out2]