Improve socat connection success detection using KMP #2506
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knative-prow
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added
approved
matejvasek
requested review from
matzew,
jrangelramos,
gauron99 and
lkingland
and removed request for
rhuss and
dsimansk
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PTAL @lkingland @matzew @gauron99 |
Codecov ReportAll modified and coverable lines are covered by tests ✅
Additional details and impacted files@@ Coverage Diff @@
## main #2506 +/- ##
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+ Coverage 61.49% 67.11% +5.62%
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Files 129 129
Lines 15381 11990 -3391
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- Hits 9458 8047 -1411
+ Misses 4989 2972 -2017
- Partials 934 971 +37
Flags with carried forward coverage won't be shown. Click here to find out more. ☔ View full report in Codecov by Sentry. |
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Also why the hell is |
That might be a GitHub flake, because it only appears twice here in the summary, but once on the "Checks" screen 🤷🏻 |
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Looks like the codecov double-result is still holding up the merge. Going to retest... |
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/override codecov/project |
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@matejvasek: matejvasek unauthorized: /override is restricted to Repo administrators. In response to this:
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It appears that Go's MatchReader() returns true only if some new lines are written to the writer after the searched word. It mostly all right because socat actually writes several more lines to stderr. However this new implementation is better it should signal immediately when searched patter is written to the writer. Signed-off-by: Matej Vašek <[email protected]>
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@dsimansk @matzew @lkingland PTAL |
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PTAL @gauron99 |
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[APPROVALNOTIFIER] This PR is APPROVED This pull-request has been approved by: gauron99, lkingland, matejvasek The full list of commands accepted by this bot can be found here. The pull request process is described here
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Changes
It appears that Go's
MatchReader()returnstrueonly if two characters are written to the writer after the searched word. Thta's mostly all right becausesocatactually writes several more lines to stderr. However this new implementation is better it should signal immediately when searched patter is written to the writer.See: https://pkg.go.dev/github.com/agext/regexp#section-documentation
See also: https://stackoverflow.com/questions/76559206/how-to-match-a-regular-expression-on-a-slow-hanging-io-reader-in-go
KMP: https://en.wikipedia.org/wiki/Knuth%E2%80%93Morris%E2%80%93Pratt_algorithm