| 1 | #!/usr/bin/env bash |
| 2 | # scripts/update-tzgeo.sh <version>, e.g. 2026b |
| 3 | # |
| 4 | # Refreshes internal/geo/data from one IANA tzdata release |
| 5 | # (nearest-region spec §6.2). zone.tab carries the coordinates; the Link |
| 6 | # lines resolve the old names browsers still report (Asia/Calcutta). Run it |
| 7 | # as a release-checklist step beside the Go toolchain bump; a stale table |
| 8 | # only misses zone names newer than it, and those fall through to IP. |
| 9 | set -euo pipefail |
| 10 | # Paul Eggert's tzdata signing key: the only signer this script accepts. |
| 11 | tz_signer=7E3792A9D8ACF7D633BC1588ED97E90E62AA7E34 |
| 12 | v="${1:?usage: update-tzgeo.sh <tzdata version, e.g. 2026b>}" |
| 13 | here="$(cd "$(dirname "$0")/.." && pwd)" |
| 14 | out="$here/internal/geo/data" |
| 15 | work="$(mktemp -d "${TMPDIR:-/tmp}/tzgeo.XXXXXX")" |
| 16 | trap 'rm -rf "$work"' EXIT |
| 17 | base="https://data.iana.org/time-zones/releases" |
| 18 | curl -fsSL -o "$work/tzdata.tar.gz" "$base/tzdata$v.tar.gz" |
| 19 | curl -fsSL -o "$work/tzdata.tar.gz.asc" "$base/tzdata$v.tar.gz.asc" |
| 20 | if command -v gpg >/dev/null; then |
| 21 | status="$(gpg --status-fd 1 --verify "$work/tzdata.tar.gz.asc" "$work/tzdata.tar.gz")" |
| 22 | # VALIDSIG's 12th field is the signing key's primary fingerprint. An |
| 23 | # expired key still gives VALIDSIG, which is fine: the signature predates it. |
| 24 | printf '%s\n' "$status" | |
| 25 | awk -v fp="$tz_signer" '$2 == "VALIDSIG" && $12 == fp { ok = 1 } END { exit !ok }' || exit 1 |
| 26 | else |
| 27 | echo "gpg not found: signature NOT checked" >&2 |
| 28 | exit 1 |
| 29 | fi |
| 30 | tar -xzf "$work/tzdata.tar.gz" -C "$work" |
| 31 | mkdir -p "$out" |
| 32 | cp "$work/zone.tab" "$out/zone.tab" |
| 33 | awk '$1 == "Link" { print $2, $3 }' \ |
| 34 | "$work"/africa "$work"/antarctica "$work"/asia "$work"/australasia \ |
| 35 | "$work"/backward "$work"/etcetera "$work"/europe "$work"/northamerica \ |
| 36 | "$work"/southamerica | sort -u > "$out/links.txt" |
| 37 | printf '%s\n' "$v" > "$out/VERSION" |
| 38 | echo "internal/geo/data refreshed to tzdata $v" |
| 39 | |
amadan