Fix a bug preventing cylc vip --workflow-name=foo from working.

`--workflow-name foo` was fine.
Caused by removal of unwanted sys.argv for Cylc VIP not removing
items not exactly matching items in the Command line options arguments.

CHANGES.md

@@ -10,6 +10,12 @@ creating a new release entry be sure to copy & paste the span tag with the
 updated. Only the first match gets replaced, so it's fine to leave the old
 ones in. -->
 
+-------------------------------------------------------------------------------
+## __cylc-8.1.2 (<span actions:bind='release-date'>Coming Soon</span>)__
+
+[#5349](https://github.com/cylc/cylc-flow/pull/5349) - Bugfix: `cylc vip --workflow-name`
+only worked when used with a space, not an `=`.
+
 -------------------------------------------------------------------------------
 ## __cylc-8.1.1 (<span actions:bind='release-date'>Released 2023-01-31</span>)__
 

cylc/flow/option_parsers.py

@@ -831,6 +831,9 @@ def cleanup_sysargv(
                     not in ['store_true', 'store_false']
                 ):
                     sys.argv.pop(index)
+            elif arg in [i.split('=')[0] for i in sys.argv]:
+                index = [i.split('=')[0] for i in sys.argv].index(arg)
+                sys.argv.pop(index)
 
     # replace compound script name:
     sys.argv[1] = script_name

tests/unit/test_option_parsers.py

@@ -397,6 +397,19 @@ def test_combine_options(inputs, expect):
             'play --foo something myworkflow'.split(),
             id='no path given'
         ),
+        param(
+            'vip --bar=something'.split(),
+            {
+                'script_name': 'play',
+                'workflow_id': 'myworkflow',
+                'compound_script_opts': [
+                    OptionSettings(['--bar', '-b'])],
+                'script_opts': [],
+                'source': './myworkflow',
+            },
+            'play myworkflow'.split(),
+            id='removes --key=value'
+        ),
     ]
 )
 def test_cleanup_sysargv(monkeypatch, argv_before, kwargs, expect):