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refactor(pullsrc): probe gz/xz and only download existing orig

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Fallback when .dsc parsing fails now probes xz→gz in order via
wget→curl→python3 _probe_url (timeout 5) and only adds the first
200 URL; avoids 404 on future gz↔xz switches. Keeps .dsc parsing as
primary, preserves set -e safety.
This commit is contained in:
boypt
2026-09-01 16:37:30 +08:00
parent d58fe29375
commit a68f3c11e2
1 changed files with 57 additions and 1 deletions
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56
pullsrc.sh
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@@ -46,7 +46,63 @@ ORIG_FILES=$(wget -qO- "$DSC_URL" 2>/dev/null | awk '/^ [0-9a-f]+ [0-9]+ openssh
if [[ -n "$ORIG_FILES" ]]; then
for f in $ORIG_FILES; do DOWNLOADLINKS+=("$DEBMIRROR/pool/main/o/openssh/$f"); done
else
# Fallback when .dsc parsing fails (network hiccup or format change):
# probe xz→gz in order, only add the first URL that actually exists (200).
# Reuse the wget→curl→python3 probe from install_deps.sh (timeout 5) so
# minimal containers without wget/curl still work; keep it inside `if`
# so `set -e` / `trap ERR` is not triggered on 404/offline.
CANDIDATES=("openssh_${OPENSSHVER}.orig.tar.xz" "openssh_${OPENSSHVER}.orig.tar.gz")
_probe_url() {
local _pu_url="$1"
if command -v wget >/dev/null 2>&1; then
if wget -q --spider --timeout=5 "$_pu_url" 2>/dev/null; then
return 0
fi
fi
if command -v curl >/dev/null 2>&1; then
if curl -fsI --max-time 5 -L "$_pu_url" >/dev/null 2>&1; then
return 0
fi
if curl -fsI --max-time 5 "$_pu_url" >/dev/null 2>&1; then
return 0
fi
fi
if command -v python3 >/dev/null 2>&1; then
if python3 -c 'import sys, urllib.request, ssl
url=sys.argv[1]
try:
ctx=ssl._create_unverified_context()
except Exception:
ctx=None
try:
req=urllib.request.Request(url, method="HEAD")
with urllib.request.urlopen(req, timeout=5, context=ctx) as r:
sys.exit(0 if r.status < 400 else 1)
except Exception:
try:
req=urllib.request.Request(url, method="GET")
with urllib.request.urlopen(req, timeout=5, context=ctx) as r:
sys.exit(0 if r.status < 400 else 1)
except Exception:
sys.exit(1)
' "$_pu_url" 2>/dev/null; then
return 0
fi
fi
return 1
}
_found=0
for cand in "${CANDIDATES[@]}"; do
if _probe_url "$DEBMIRROR/pool/main/o/openssh/$cand"; then
DOWNLOADLINKS+=("$DEBMIRROR/pool/main/o/openssh/$cand")
_found=1
break
fi
done
if [[ $_found -eq 0 ]]; then
# offline or both 404: keep one attempt so wget error is explicit via trap ERR
DOWNLOADLINKS+=("$DEBMIRROR/pool/main/o/openssh/openssh_${OPENSSHVER}.orig.tar.xz")
fi
fi
DOWNLOADLINKS+=("${OPENSSLMIR}/${OPENSSLSRC}")