Mario Fetka
60 lines
2.8 KiB
Bash
Executable File
60 lines
2.8 KiB
Bash
Executable File
#!/bin/sh
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set -eu
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if [ "$#" -ne 4 ] || [ -z "$1" ]; then
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echo "usage: update-zoneinfo.sh TZDATA_DIR VZIC IMPORTER OUTPUT_DIR" >&2
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echo "CMake users: configure -DBONGO_TZDATA_DIR=/path/to/tzdata, then build update-zoneinfo" >&2
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exit 2
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fi
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olson_dir=$1
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vzic=$2
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importer=$3
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output_dir=$4
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[ -d "$olson_dir" ] || { echo "tzdata directory not found: $olson_dir" >&2; exit 2; }
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[ -r "$olson_dir/africa" ] || { echo "not an unpacked IANA tzdata tree: $olson_dir" >&2; exit 2; }
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[ -r "$olson_dir/version" ] || { echo "IANA tzdata version file not found: $olson_dir/version" >&2; exit 2; }
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[ -x "$vzic" ] || { echo "vzic executable not found: $vzic" >&2; exit 2; }
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[ -x "$importer" ] || { echo "timezone importer not found: $importer" >&2; exit 2; }
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[ -d "$output_dir" ] || { echo "output directory not found: $output_dir" >&2; exit 2; }
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staging=$(mktemp -d "${TMPDIR:-/tmp}/bongo-zoneinfo.XXXXXX")
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trap 'rm -rf "$staging"' EXIT HUP INT TERM
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mkdir "$staging/ics" "$staging/zones"
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iana_version=$(sed -n '1p' "$olson_dir/version")
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case "$iana_version" in
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[0-9][0-9][0-9][0-9][a-z]) ;;
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*) echo "invalid IANA tzdata version: $iana_version" >&2; exit 2 ;;
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esac
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release_date=$(awk -v version="$iana_version" \
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'$1 == "Release" && $2 == version && $3 == "-" { print $4; exit }' \
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"$olson_dir/NEWS")
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case "$release_date" in
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[0-9][0-9][0-9][0-9]-[0-9][0-9]-[0-9][0-9]) ;;
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*) echo "release date for IANA tzdata $iana_version not found in NEWS" >&2; exit 2 ;;
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esac
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release_stamp=$(printf '%s' "$release_date" | tr -d '-')T000000Z
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"$vzic" --pure --output-dir "$staging/ics" --olson-dir "$olson_dir"
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# vzic records the wall-clock conversion time in every VTIMEZONE. Normalize
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# it to the IANA release date so that repeated snapshot updates are identical.
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find "$staging/ics" -type f -name '*.ics' \
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-exec sed -i "s/^LAST-MODIFIED:.*/LAST-MODIFIED:${release_stamp}\\r/" '{}' +
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: > "$staging/zones/generated.tznames"
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find "$staging/ics" -type f -name '*.ics' -exec "$importer" '{}' "$staging/zones" ';'
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LC_ALL=C sort -u "$staging/zones/generated.tznames" > "$staging/generated.tznames"
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mv "$staging/generated.tznames" "$staging/zones/generated.tznames"
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printf '%s\n' "$iana_version" > "$staging/zones/IANA_VERSION"
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count=$(find "$staging/zones" -type f -name '*.zone' | wc -l)
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[ "$count" -gt 0 ] || { echo "timezone conversion produced no zone files" >&2; exit 1; }
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# Replace the checked-in snapshot only after conversion completed successfully.
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find "$output_dir" -maxdepth 1 -type f -name '*.zone' -delete
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find "$staging/zones" -maxdepth 1 -type f -name '*.zone' -exec cp '{}' "$output_dir/" ';'
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cp "$staging/zones/generated.tznames" "$output_dir/generated.tznames"
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cp "$staging/zones/IANA_VERSION" "$output_dir/IANA_VERSION"
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echo "Updated $count Bongo timezone files from IANA tzdata $iana_version in $output_dir"
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