upstream-zulip/tools/setup/pack-local-script

#!/usr/bin/env bash

# This tool generates code in shell which is meant to be inline'd into
# a larger script; called with a variable name and a path, it produces
# a script which will result in that variable being set to the path to
# the contents of that path.
#
# This is used in bootstrap-aws-installer to bundle local files into
# the EC2 user data, so that those canonical versions can be used to
# bootstrap the host.
set -eu

var="$1"
file="$2"

mode="$(stat -c "%a" "$file")"

encoded="$(gzip --stdout "$file" | base64)"
cat <<embedded-shell-output
$var="\$(mktemp)"
chmod "$mode" "\$$var"
base64 -d <<"encoded-shell-script" | gzip -d > "\$$var"
$encoded
encoded-shell-script
embedded-shell-output