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links: check github.com blob links through the raw host #30

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Merged
tannevaled merged 1 commit into from
Oct 10, 2026
Merged

links: check github.com blob links through the raw host #30

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11 changes: 10 additions & 1 deletion .github/workflows/docs.yml
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Original file line number Diff line number Diff line change
Expand Up @@ -125,11 +125,20 @@ jobs:
# Documented placeholders, not hosts.
*example.com*|*example.org*|*example.net*|*localhost*|*127.0.0.1*|*.invalid*) continue ;;
esac
# github.com answers curl's blob pages with 503 most of the time
# (7 of 8 on 2026-10-10, all 3 attempts on every run), while the
# raw host answers 200 for a file and 404 for a missing one. A blob
# link claims "this file exists at this ref", so ask the raw host.
probe=$u
case "$u" in
https://github.com/*/*/blob/*)
probe=https://raw.githubusercontent.com/$(printf '%s' "${u#https://github.com/}" | sed -E 's#^([^/]+/[^/]+)/blob/#\1/#; s/[?#].*$//') ;;
esac
# Three attempts: one is a flake detector rather than a link
# checker, and a lane that fails at random gets ignored.
code=000
for _ in 1 2 3; do
code=$(curl -sS -o /dev/null -w '%{http_code}' -L --max-time 25 "$u" 2>/dev/null) || true
code=$(curl -sS -o /dev/null -w '%{http_code}' -L --max-time 25 "$probe" 2>/dev/null) || true
code=${code:-000}
case "$code" in 2*|3*) break ;; esac
sleep 3
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