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0a839a4857
On forward-porting, odoo/odoo#170183 generates a conflict on pretty much every one of the 1111 files it touches, because they are modify/delete conflicts that generates a conflict message over 200 bytes per file, which is over 200kB of output. For this specific scenario, the commit message was being passed through arguments to the `git` command, resulting in a command line exceeding `MAX_ARG_STRLEN`[^1]. The obvious way to fix this is to pass the commit message via stdin as is done literally in the line above where we just copy a non-generated commit message. However I don't think hundreds of kbytes worth of stdout[^2] is of any use, so shorten that a bit, and stderr while at it. Don't touch the commit message size for now, possibly forever, but note that some log diving reveals a commit with a legit 18kB message (odoo/odoo@42a3b704f7) so if we want to restrict that the limit should be at least 32k, and possibly 64. But it might be a good idea to make that limit part of the ready / merge checks too, rather than cut things off or trigger errors during staging. Fixes #900 [^1]: Most resources on "Argument list too long" reference `ARG_MAX`, but on both my machine and the server it is 2097152 (25% of the default stack), which is ~10x larger than the commit message we tried to generate. The actual limit is `MAX_ARG_STRLEN` which can't be queried directly but is essentially hard-coded to PAGE_SIZE * 32 = 128kiB, which tracks. [^2]: Somewhat unexpectedly, that's where `git-cherry-pick` sends the conflict info.
37 lines
1.1 KiB
Python
37 lines
1.1 KiB
Python
# -*- coding: utf-8 -*-
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import itertools
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import time
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def shorten(text_ish, length, cont='...'):
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""" If necessary, cuts-off the text or bytes input and appends ellipsis to
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signal the cutoff, such that the result is below the provided length
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(according to whatever "len" means on the text-ish so bytes or codepoints
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or code units).
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"""
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if len(text_ish or ()) <= length:
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return text_ish
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if isinstance(text_ish, bytes):
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cont = cont.encode('ascii') # whatever
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# add enough room for the ellipsis
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return text_ish[:length-len(cont)] + cont
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BACKOFF_DELAYS = (0.1, 0.2, 0.4, 0.8, 1.6)
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def backoff(func=None, *, delays=BACKOFF_DELAYS, exc=Exception):
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if func is None:
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return lambda func: backoff(func, delays=delays, exc=exc)
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for delay in itertools.chain(delays, [None]):
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try:
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return func()
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except exc:
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if delay is None:
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raise
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time.sleep(delay)
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def make_message(pr_dict):
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title = pr_dict['title'].strip()
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body = (pr_dict.get('body') or '').strip()
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return f'{title}\n\n{body}' if body else title
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