92 lines
2.5 KiB
Bash
92 lines
2.5 KiB
Bash
#!/usr/bin/env bash
|
|
set -e
|
|
|
|
readonly MIN_BASH_VERSION=5
|
|
readonly MIN_DOCKER_VERSION=25
|
|
readonly MIN_JQ_VERSION=1.6
|
|
readonly MIN_GPG_VERSION=2.2
|
|
|
|
### Exit with error message
|
|
die() {
|
|
echo "$@" >&2
|
|
exit 1
|
|
}
|
|
|
|
### Bail and instruct user on missing package to install for their platform
|
|
die_pkg() {
|
|
local -r package=${1?}
|
|
local -r version=${2?}
|
|
local install_cmd
|
|
case "$OSTYPE" in
|
|
linux*)
|
|
if command -v "apt" >/dev/null; then
|
|
install_cmd="apt install ${package}"
|
|
elif command -v "yum" >/dev/null; then
|
|
install_cmd="yum install ${package}"
|
|
elif command -v "pacman" >/dev/null; then
|
|
install_cmd="pacman -Ss ${package}"
|
|
elif command -v "emerge" >/dev/null; then
|
|
install_cmd="emerge ${package}"
|
|
elif command -v "nix-env" >/dev/null; then
|
|
install_cmd="nix-env -i ${package}"
|
|
fi
|
|
;;
|
|
bsd*) install_cmd="pkg install ${package}" ;;
|
|
darwin*) install_cmd="port install ${package}" ;;
|
|
*) die "Error: Your operating system is not supported" ;;
|
|
esac
|
|
echo "Error: ${package} ${version}+ does not appear to be installed." >&2
|
|
[ -n "$install_cmd" ] && echo "Try: \`${install_cmd}\`" >&2
|
|
exit 1
|
|
}
|
|
|
|
### Check if actual binary version is >= minimum version
|
|
check_version(){
|
|
local pkg="${1?}"
|
|
local have="${2?}"
|
|
local need="${3?}"
|
|
local i ver1 ver2 IFS='.'
|
|
[[ "$have" == "$need" ]] && return 0
|
|
read -r -a ver1 <<< "$have"
|
|
read -r -a ver2 <<< "$need"
|
|
for ((i=${#ver1[@]}; i<${#ver2[@]}; i++));
|
|
do ver1[i]=0;
|
|
done
|
|
for ((i=0; i<${#ver1[@]}; i++)); do
|
|
[[ -z ${ver2[i]} ]] && ver2[i]=0
|
|
((10#${ver1[i]} > 10#${ver2[i]})) && return 0
|
|
((10#${ver1[i]} < 10#${ver2[i]})) && die_pkg "${pkg}" "${need}"
|
|
done
|
|
}
|
|
|
|
### Check if required binaries are installed at appropriate versions
|
|
check_tools(){
|
|
if [ -z "${BASH_VERSINFO[0]}" ] \
|
|
|| [ "${BASH_VERSINFO[0]}" -lt "${MIN_BASH_VERSION}" ]; then
|
|
die_pkg "bash" "${MIN_BASH_VERSION}"
|
|
fi
|
|
for cmd in "$@"; do
|
|
command -v "$1" >/dev/null || die "Error: $cmd not found"
|
|
case $cmd in
|
|
jq)
|
|
version=$(jq -V | sed 's/.*-//g')
|
|
check_version "jq" "${version}" "${MIN_JQ_VERSION}"
|
|
;;
|
|
gpg)
|
|
version=$(gpg --version | head -n1 | cut -d" " -f3)
|
|
check_version "gnupg" "${version}" "${MIN_GPG_VERSION}"
|
|
;;
|
|
docker)
|
|
version=$(docker version -f json | jq -r '.Server.Version')
|
|
check_version "docker" "${version}" "${MIN_DOCKER_VERSION}"
|
|
;;
|
|
esac
|
|
done
|
|
}
|
|
|
|
check_tools jq gpg docker;
|
|
|
|
docker info -f '{{ .DriverStatus }}' \
|
|
| grep "io.containerd.snapshotter.v1" >/dev/null \
|
|
|| die "Error: Docker Engine is not using containerd for image storage"
|