Merge ~adam-collard/maas-ci/+git/system-tests:output-file-filter-envs into ~maas-committers/maas-ci/+git/system-tests:master

[Adam Collard]

Add --output-file option to filter_envs

[MAAS Lander (maas-lander)]

UNIT TESTS
-b output-file-filter-envs lp:~adam-collard/maas-ci/+git/system-tests into -b master lp:~maas-committers/maas-ci/+git/system-tests

STATUS: SUCCESS
COMMIT: 0c9841719007ae9707d8bdcdb5466a98a0be26f6

review: Approve

[Thorsten Merten (thorsten-merten)]

+1 (also for removing that annoying blank line :) ).

review: Approve

diff --git a/utils/filter_envs.py b/utils/filter_envs.py
index df3976a..05d2d0f 100644
--- a/utils/filter_envs.py
+++ b/utils/filter_envs.py
@@ -4,7 +4,6 @@ import sys
 
 
 def main(argv: list[str]) -> int:
-
     parser = argparse.ArgumentParser()
     parser.add_argument(
         "desired_envs",
@@ -12,6 +11,10 @@ def main(argv: list[str]) -> int:
         help="list of desired envs separated by ',' (ie: vm1,vm2,opelt)",
     )
 
+    parser.add_argument(
+        "--output-file", type=argparse.FileType("w"), default=sys.stdout
+    )
+
     args = parser.parse_args(argv)
 
     valid_envs_raw = subprocess.check_output(["tox", "-a"], encoding="utf8")
@@ -19,7 +22,7 @@ def main(argv: list[str]) -> int:
 
     desired_envs = set(args.desired_envs.split(","))
 
-    print(",".join(desired_envs & valid_envs))
+    print(",".join(desired_envs & valid_envs), file=args.output_file)
     return 0