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[3.13] gh-129248: Filter out the iOS log prefix from testbed runner output. (GH-129252) by miss-islington · Pull Request #129283 · python/cpython · GitHub

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[3.13] gh-129248: Filter out the iOS log prefix from testbed runner output. (GH-129252) #129283

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freakboy3742 merged 1 commit into from
Jan 25, 2025
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[3.13] gh-129248: Filter out the iOS log prefix from testbed runner output. (GH-129252) #129283

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2 changes: 2 additions & 0 deletions Misc/NEWS.d/next/Tools-Demos/2025-01-24-14-49-40.gh-issue-129248.JAapG2.rst
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Original file line number Diff line number Diff line change
@@ -0,0 +1,2 @@
The iOS test runner now strips the log prefix from each line output by the
test suite.
15 changes: 15 additions & 0 deletions iOS/testbed/__main__.py
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Original file line number Diff line number Diff line change
Expand Up @@ -2,6 +2,7 @@
import asyncio
import json
import plistlib
import re
import shutil
import subprocess
import sys
Expand All @@ -12,6 +13,18 @@

DECODE_ARGS = ("UTF-8", "backslashreplace")

# The system log prefixes each line:
# 2025-01-17 16:14:29.090 Df iOSTestbed[23987:1fd393b4] (Python) ...
# 2025-01-17 16:14:29.090 E iOSTestbed[23987:1fd393b4] (Python) ...

LOG_PREFIX_REGEX = re.compile(
r"^\d{4}-\d{2}-\d{2}" # YYYY-MM-DD
r"\s+\d+:\d{2}:\d{2}\.\d+" # HH:MM:SS.sss
r"\s+\w+" # Df/E
r"\s+iOSTestbed\[\d+:\w+\]" # Process/thread ID
r"\s+\(Python\)\s" # Logger name
)


# Work around a bug involving sys.exit and TaskGroups
# (https://github.com/python/cpython/issues/101515).
Expand Down Expand Up @@ -131,6 +144,8 @@ async def log_stream_task(initial_devices):
) as process:
suppress_dupes = False
while line := (await process.stdout.readline()).decode(*DECODE_ARGS):
# Strip the prefix from each log line
line = LOG_PREFIX_REGEX.sub("", line)
# The iOS log streamer can sometimes lag; when it does, it outputs
# a warning about messages being dropped... often multiple times.
# Only print the first of these duplicated warnings.
Expand Down
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