who_need_help/scripts/ensure-local-metrics-token.sh

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#!/bin/sh
set -eu
ROOT=$(CDPATH='' cd -- "$(dirname -- "$0")/.." && pwd)
ENV_FILE="$ROOT/.env"
if [ ! -f "$ENV_FILE" ]; then
echo "Missing $ENV_FILE. Copy .env.example to .env first." >&2
exit 1
fi
for command in openssl perl; do
if ! command -v "$command" >/dev/null 2>&1; then
echo "Required command is unavailable: $command" >&2
exit 1
fi
done
current=$(
perl -ne '
if (/^METRICS_TOKEN=(.*)$/) {
print $1;
exit;
}
' "$ENV_FILE"
)
if [ -n "$current" ]; then
chmod 600 "$ENV_FILE"
echo "METRICS_TOKEN already exists; no secret was changed."
exit 0
fi
new_metrics_token=$(openssl rand -hex 32)
tmp_env=$(mktemp "${ENV_FILE}.metrics.XXXXXX")
trap 'rm -f "$tmp_env"' EXIT HUP INT TERM
chmod 600 "$tmp_env"
NEW_METRICS_TOKEN=$new_metrics_token perl -0pe '
if (s/^METRICS_TOKEN=.*$/METRICS_TOKEN=$ENV{NEW_METRICS_TOKEN}/m) {
$replaced = 1;
}
END {
print "\nMETRICS_TOKEN=$ENV{NEW_METRICS_TOKEN}\n" unless $replaced;
}
' "$ENV_FILE" >"$tmp_env"
mv "$tmp_env" "$ENV_FILE"
chmod 600 "$ENV_FILE"
trap - EXIT HUP INT TERM
unset new_metrics_token
echo "Generated METRICS_TOKEN in the ignored .env without printing it."