Use nice spinner function from Rich instead of homebrew code.

See nf-core#816

nf_core/utils.py

@@ -19,6 +19,8 @@
 import sys
 import time
 import yaml
+from rich.live import Live
+from rich.spinner import Spinner
 
 log = logging.getLogger(__name__)
 
@@ -269,30 +271,12 @@ def wait_cli_function(poll_func, poll_every=20):
        None. Just sits in an infite loop until the function returns True.
     """
     try:
-        is_finished = False
-        check_count = 0
-
-        def spinning_cursor():
+        spinner = Spinner("dots2", "Use ctrl+c to stop waiting and force exit.")
+        with Live(spinner, refresh_per_second=20) as live:
             while True:
-                for cursor in "⠋⠙⠹⠸⠼⠴⠦⠧⠇⠏":
-                    yield "{} Use ctrl+c to stop waiting and force exit. ".format(cursor)
-
-        spinner = spinning_cursor()
-        while not is_finished:
-            # Write a new loading text
-            loading_text = next(spinner)
-            sys.stdout.write(loading_text)
-            sys.stdout.flush()
-            # Show the loading spinner every 0.1s
-            time.sleep(0.1)
-            # Wipe the previous loading text
-            sys.stdout.write("\b" * len(loading_text))
-            sys.stdout.flush()
-            # Only check every 2 seconds, but update the spinner every 0.1s
-            check_count += 1
-            if check_count > poll_every:
-                is_finished = poll_func()
-                check_count = 0
+                if poll_func():
+                    break
+                time.sleep(2)
     except KeyboardInterrupt:
         raise AssertionError("Cancelled!")
 

setup.py

@@ -41,7 +41,7 @@
         "pyyaml",
         "requests",
         "requests_cache",
-        "rich>=9",
+        "rich>=9.4",
         "tabulate",
     ],
     setup_requires=["twine>=1.11.0", "setuptools>=38.6."],