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December 13, 2022 10:55
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#!/usr/bin/env bash | |
set -e | |
DEFAULT_BIN_DIR="/usr/local/bin" | |
BIN_DIR=${1:-"${DEFAULT_BIN_DIR}"} | |
GITHUB_REPO="fluxcd/flux2" | |
# Helper functions for logs | |
info() { | |
echo '[INFO] ' "$@" | |
} | |
warn() { | |
echo '[WARN] ' "$@" >&2 | |
} | |
fatal() { | |
echo '[ERROR] ' "$@" >&2 | |
exit 1 | |
} | |
# Set os, fatal if operating system not supported | |
setup_verify_os() { | |
if [[ -z "${OS}" ]]; then | |
OS=$(uname) | |
fi | |
case ${OS} in | |
Darwin) | |
OS=darwin | |
;; | |
Linux) | |
OS=linux | |
;; | |
*) | |
fatal "Unsupported operating system ${OS}" | |
esac | |
} | |
# Set arch, fatal if architecture not supported | |
setup_verify_arch() { | |
if [[ -z "${ARCH}" ]]; then | |
ARCH=$(uname -m) | |
fi | |
case ${ARCH} in | |
arm|armv6l|armv7l) | |
ARCH=arm | |
;; | |
arm64|aarch64|armv8l) | |
ARCH=arm64 | |
;; | |
amd64) | |
ARCH=amd64 | |
;; | |
x86_64) | |
ARCH=amd64 | |
;; | |
*) | |
fatal "Unsupported architecture ${ARCH}" | |
esac | |
} | |
# Verify existence of downloader executable | |
verify_downloader() { | |
# Return failure if it doesn't exist or is no executable | |
[[ -x "$(which "$1")" ]] || return 1 | |
# Set verified executable as our downloader program and return success | |
DOWNLOADER=$1 | |
return 0 | |
} | |
# Create tempory directory and cleanup when done | |
setup_tmp() { | |
TMP_DIR=$(mktemp -d -t flux-install.XXXXXXXXXX) | |
TMP_METADATA="${TMP_DIR}/flux.json" | |
TMP_HASH="${TMP_DIR}/flux.hash" | |
TMP_BIN="${TMP_DIR}/flux.tar.gz" | |
cleanup() { | |
local code=$? | |
set +e | |
trap - EXIT | |
rm -rf "${TMP_DIR}" | |
exit ${code} | |
} | |
trap cleanup INT EXIT | |
} | |
# Find version from Github metadata | |
get_release_version() { | |
if [[ -n "${FLUX_VERSION}" ]]; then | |
SUFFIX_URL="tags/v${FLUX_VERSION}" | |
else | |
SUFFIX_URL="latest" | |
fi | |
METADATA_URL="https://api.github.com/repos/${GITHUB_REPO}/releases/${SUFFIX_URL}" | |
echo "-> $METADATA_URL" | |
info "Downloading metadata ${METADATA_URL}" | |
download "${TMP_METADATA}" "${METADATA_URL}" | |
VERSION_FLUX=$(grep '"tag_name":' "${TMP_METADATA}" | sed -E 's/.*"([^"]+)".*/\1/' | cut -c 2-) | |
if [[ -n "${VERSION_FLUX}" ]]; then | |
info "Using ${VERSION_FLUX} as release" | |
else | |
fatal "Unable to determine release version" | |
fi | |
} | |
# Download from file from URL | |
download() { | |
[[ $# -eq 2 ]] || fatal 'download needs exactly 2 arguments' | |
case $DOWNLOADER in | |
curl) | |
curl -o "$1" -sfL "$2" | |
;; | |
wget) | |
wget -qO "$1" "$2" | |
;; | |
*) | |
fatal "Incorrect executable '${DOWNLOADER}'" | |
;; | |
esac | |
# Abort if download command failed | |
[[ $? -eq 0 ]] || fatal 'Download failed' | |
} | |
# Version comparison | |
# Returns 0 on '=', 1 on '>', and 2 on '<'. | |
# Ref: https://stackoverflow.com/a/4025065 | |
vercomp () { | |
if [[ $1 == $2 ]] | |
then | |
return 0 | |
fi | |
local IFS=. | |
local i ver1=($1) ver2=($2) | |
# fill empty fields in ver1 with zeros | |
for ((i=${#ver1[@]}; i<${#ver2[@]}; i++)) | |
do | |
ver1[i]=0 | |
done | |
for ((i=0; i<${#ver1[@]}; i++)) | |
do | |
if [[ -z ${ver2[i]} ]] | |
then | |
# fill empty fields in ver2 with zeros | |
ver2[i]=0 | |
fi | |
if ((10#${ver1[i]} > 10#${ver2[i]})) | |
then | |
return 1 | |
fi | |
if ((10#${ver1[i]} < 10#${ver2[i]})) | |
then | |
return 2 | |
fi | |
done | |
return 0 | |
} | |
# Download hash from Github URL | |
download_hash() { | |
HASH_URL="https://github.com/${GITHUB_REPO}/releases/download/v${VERSION_FLUX}/flux_${VERSION_FLUX}_checksums.txt" | |
# NB: support the checksum filename format prior to v0.6.0 | |
set +e | |
vercomp ${VERSION_FLUX} 0.6.0 | |
if [[ $? -eq 2 ]]; then | |
HASH_URL="https://github.com/${GITHUB_REPO}/releases/download/v${VERSION_FLUX}/flux2_${VERSION_FLUX}_checksums.txt" | |
fi | |
set -e | |
info "Downloading hash ${HASH_URL}" | |
download "${TMP_HASH}" "${HASH_URL}" | |
HASH_EXPECTED=$(grep " flux_${VERSION_FLUX}_${OS}_${ARCH}.tar.gz$" "${TMP_HASH}") | |
HASH_EXPECTED=${HASH_EXPECTED%%[[:blank:]]*} | |
} | |
# Download binary from Github URL | |
download_binary() { | |
BIN_URL="https://github.com/${GITHUB_REPO}/releases/download/v${VERSION_FLUX}/flux_${VERSION_FLUX}_${OS}_${ARCH}.tar.gz" | |
info "Downloading binary ${BIN_URL}" | |
download "${TMP_BIN}" "${BIN_URL}" | |
} | |
compute_sha256sum() { | |
cmd=$(which sha256sum shasum | head -n 1) | |
case $(basename "$cmd") in | |
sha256sum) | |
sha256sum "$1" | cut -f 1 -d ' ' | |
;; | |
shasum) | |
shasum -a 256 "$1" | cut -f 1 -d ' ' | |
;; | |
*) | |
fatal "Can not find sha256sum or shasum to compute checksum" | |
;; | |
esac | |
} | |
# Verify downloaded binary hash | |
verify_binary() { | |
info "Verifying binary download" | |
HASH_BIN=$(compute_sha256sum "${TMP_BIN}") | |
HASH_BIN=${HASH_BIN%%[[:blank:]]*} | |
if [[ "${HASH_EXPECTED}" != "${HASH_BIN}" ]]; then | |
fatal "Download sha256 does not match ${HASH_EXPECTED}, got ${HASH_BIN}" | |
fi | |
} | |
# Setup permissions and move binary | |
setup_binary() { | |
chmod 755 "${TMP_BIN}" | |
info "Installing flux to ${BIN_DIR}/flux" | |
tar -xzof "${TMP_BIN}" -C "${TMP_DIR}" | |
local CMD_MOVE="mv -f \"${TMP_DIR}/flux\" \"${BIN_DIR}\"" | |
if [[ -w "${BIN_DIR}" ]]; then | |
eval "${CMD_MOVE}" | |
else | |
eval "sudo ${CMD_MOVE}" | |
fi | |
} | |
# Run the install process | |
{ | |
echo "-> example use: export FLUX_VERSION=0.27.3 -> $FLUX_VERSION" | |
setup_verify_os | |
setup_verify_arch | |
verify_downloader curl || verify_downloader wget || fatal 'Can not find curl or wget for downloading files' | |
setup_tmp | |
get_release_version | |
download_hash | |
download_binary | |
verify_binary | |
setup_binary | |
sudo mv /usr/local/bin/flux /home/bap/.local/bin/flux | |
echo "flux install --version=latest --export > gotk-components.yaml" | |
} |
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