`autoupdate.log` grows indefinitely

[martin-helmich]

Describe the bug
I maintain a CLI tool (and frequently use it myself) that uses the update-plugin, and recently noticed a log file in my cache directory (~/Library/Caches/<toolname>, on macOS) that seems to have grown to a significant size over the time.

martin@martins-box $ l Library/Caches/mw/autoupdate.log
-rw-r--r--@ 1 mhelmich  staff    11G 19 Feb. 09:53 Library/Caches/mw/autoupdate.log

From the looks of it, this file is created/appended in this plugin's init hook, but never rotated or cleared:

plugin-update/src/hooks/init.ts

Lines 72 to 76 in 7d590d6

	const fd = await open(autoupdatelogfile, 'a')
	await writeFile(
	fd,
	timestamp(`starting \`${binPath} update --autoupdate\` from ${process.argv.slice(1, 3).join(' ')}\n`),
	)

To Reproduce
Steps to reproduce the behavior:

1. Use any oclif tool that uses the "update" plugin for an extended amount of time

Expected behavior
I would expect this log file to not grow to an infinite size, either be regularly rotating it, or truncating it to manageable sizes.

Screenshots
n/a

Environment (please complete the following information):

• OS & version: macOS 26.3.1
• Shell/terminal & version: iTerm2 + zsh

Additional context
I did not modify any of the default debounce settings, so those should still be on the default of 14 days for the stable channel.

[git2gus]

This issue has been linked to a new work item: W-21546780

[jfeingold35]

@martin-helmich , thanks for bringing this to our attention. We'll add it to our backlog and prioritize it appropriately, and we'll keep you posted as updates become available.