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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. |
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| .. | ||
| conftest.py | ||
| test_batches.py | ||
| test_conflicts.py | ||
| test_limit.py | ||
| test_overrides.py | ||
| test_simple.py | ||
| test_updates.py | ||
| test_weird.py | ||