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fix: strip whole escape sequences from the console dump, and name the GRUB hang

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The first sanitize stripped only the ESC byte, leaving visible '[1m[37m'
halves as noise. Strip full CSI/escape sequences first (while ESC is
present), then residual control bytes — clean text.

And read the log: a box sitting at 'GNU GRUB / Press enter to boot /
UEFI Firmware Settings' never booted — that is the IMAGE, not box. Say
so, and point at re-pulling the image or pinning BOX_IMAGE. Surfaced
running the 0.5.0 drill after --purge-storage re-downloaded a
debian/13/cloud build that hangs at the GRUB menu on the serial console.
This commit is contained in:
claude-hdb 2026-07-14 16:56:52 +00:00
parent c4cc9f43d1
commit b9480fd9ce
1 changed files with 14 additions and 3 deletions
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17
bin/box
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@ -512,10 +512,21 @@ wait_agent() {
# print only a short sanitized tail. Nothing raw ever reaches a terminal.
clog="/tmp/box-console-$n.log"
timeout -k 5 15 incus console "$n" --show-log </dev/null >"$clog.raw" 2>/dev/null || true
tr -cd '\11\12\40-\176' <"$clog.raw" >"$clog" 2>/dev/null; rm -f "$clog.raw"
# Strip whole escape sequences FIRST (while the ESC byte is present), then
# drop any residual control bytes — otherwise 'tr' alone leaves the visible
# '[1m[37m' halves behind. Result is clean, readable text.
sed -E $'s/\x1b\\[[0-9;:?]*[ -/]*[@-~]//g; s/\x1b[()#][0-9A-Za-z]//g; s/\x1b[=>PX^_].*?(\x1b\\\\|\x07)//g; s/\x1b.//g' \
"$clog.raw" 2>/dev/null | tr -cd '\11\12\40-\176' >"$clog"
rm -f "$clog.raw"
echo "box: instance agent never came up after 5 minutes." >&2
echo "box: sanitized console log → $clog (last lines:)" >&2
tail -8 "$clog" 2>/dev/null | sed 's/^/ /' >&2
echo "box: sanitized console log → $clog (last non-blank lines:)" >&2
grep -v '^[[:space:]]*$' "$clog" 2>/dev/null | tail -6 | sed 's/^/ /' >&2
# A box sitting at the GRUB/firmware menu is not slow — it never booted.
if grep -qiE 'GNU GRUB|Press enter to boot|UEFI Firmware Settings' "$clog" 2>/dev/null; then
echo "box: the VM is stuck at the GRUB/firmware menu — it is not booting." >&2
echo "box: this is the IMAGE, not box. Try re-pulling it (incus image delete …)" >&2
echo "box: or pin a known-good build/alias in the template's BOX_IMAGE." >&2
fi
die "agent unreachable (inspect live: incus console $n)"
fi
sleep 2