zulip/puppet/kandra/files/install-ssh-keys

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#!/usr/bin/env bash
set -euo pipefail
username="$1"
ssh_secret_name="$2"
homedir="$(getent passwd "$username" | cut -d: -f6)"
sshdir="$homedir/.ssh"
umask 077
workdir=$(mktemp -d)
chown "$username:$username" "$workdir"
cleanup() { ls -al "$workdir" && rm -rf "$workdir"; }
trap cleanup EXIT
umask 033
keydata="$(/srv/zulip-aws-tools/bin/aws --output text \
secretsmanager get-secret-value \
--secret-id "$ssh_secret_name" \
--query SecretString)"
for keyfile in $(jq -r 'keys[]' <<<"$keydata"); do
touch "$workdir/$keyfile"
if [[ "$keyfile" != *".pub" ]]; then
chmod 600 "$workdir/$keyfile"
fi
jq -r ".[\"$keyfile\"]" <<<"$keydata" | base64 -d >"$workdir/$keyfile"
chown "$username:$username" "$workdir/$keyfile"
done
if [ "$#" -gt 2 ]; then
diff -rN -x config -x authorized_keys -x known_hosts \
"$workdir/" "$sshdir/"
exit 0
fi
rsync -av --delete \
--exclude config --exclude authorized_keys --exclude known_hosts \
"$workdir/" "$sshdir/"