#!/usr/bin/env bash
# Copyright 2014 The Kubernetes Authors.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
function kube::util::sourced_variable {
# Call this function to tell shellcheck that a variable is supposed to
# be used from other calling context. This helps quiet an "unused
# variable" warning from shellcheck and also document your code.
true
}
kube::util::sortable_date() {
date "+%Y%m%d-%H%M%S"
}
# arguments: target, item1, item2, item3, ...
# returns 0 if target is in the given items, 1 otherwise.
kube::util::array_contains() {
local search="$1"
local element
shift
for element; do
if [[ "${element}" == "${search}" ]]; then
return 0
fi
done
return 1
}
kube::util::wait_for_url() {
local url=$1
local prefix=${2:-}
local wait=${3:-1}
local times=${4:-30}
local maxtime=${5:-1}
command -v curl >/dev/null || {
kube::log::usage "curl must be installed"
exit 1
}
local i
for i in $(seq 1 "${times}"); do
local out
if out=$(curl --max-time "${maxtime}" -gkfs "${@:6}" "${url}" 2>/dev/null); then
kube::log::status "On try ${i}, ${prefix}: ${out}"
return 0
fi
sleep "${wait}"
done
kube::log::error "Timed out waiting for ${prefix} to answer at ${url}; tried ${times} waiting ${wait} between each"
return 1
}
kube::util::wait_for_url_with_bearer_token() {
local url=$1
local token=$2
local prefix=${3:-}
local wait=${4:-1}
local times=${5:-30}
local maxtime=${6:-1}
kube::util::wait_for_url "${url}" "${prefix}" "${wait}" "${times}" "${maxtime}" -H "Authorization: Bearer ${token}"
}
# Example: kube::util::wait_for_success 120 5 "kubectl get nodes|grep localhost"
# arguments: wait time, sleep time, shell command
# returns 0 if the shell command get output, 1 otherwise.
kube::util::wait_for_success(){
local wait_time="$1"
local sleep_time="$2"
local cmd="$3"
while [ "$wait_time" -gt 0 ]; do
if eval "$cmd"; then
return 0
else
sleep "$sleep_time"
wait_time=$((wait_time-sleep_time))
fi
done
return 1
}
# Example: kube::util::trap_add 'echo "in trap DEBUG"' DEBUG
# See: http://stackoverflow.com/questions/3338030/multiple-bash-traps-for-the-same-signal
kube::util::trap_add() {
local trap_add_cmd
trap_add_cmd=$1
shift
for trap_add_name in "$@"; do
local existing_cmd
local new_cmd
# Grab the currently defined trap commands for this trap
existing_cmd=$(trap -p "${trap_add_name}" | awk -F"'" '{print $2}')
if [[ -z "${existing_cmd}" ]]; then
new_cmd="${trap_add_cmd}"
else
new_cmd="${trap_add_cmd};${existing_cmd}"
fi
# Assign the test. Disable the shellcheck warning telling that trap
# commands should be single quoted to avoid evaluating them at this
# point instead evaluating them at run time. The logic of adding new
# commands to a single trap requires them to be evaluated right away.
# shellcheck disable=SC2064
trap "${new_cmd}" "${trap_add_name}"
done
}
# Opposite of kube::util::ensure-temp-dir()
kube::util::cleanup-temp-dir() {
rm -rf "${KUBE_TEMP}"
}
# Create a temp dir that'll be deleted at the end of this bash session.
#
# Vars set:
# KUBE_TEMP
kube::util::ensure-temp-dir() {
if [[ -z ${KUBE_TEMP-} ]]; then
KUBE_TEMP=$(mktemp -d 2>/dev/null || mktemp -d -t kubernetes.XXXXXX)
kube::util::trap_add kube::util::cleanup-temp-dir EXIT
fi
}
kube::util::host_os() {
local host_os
case "$(uname -s)" in
Darwin)
host_os=darwin
;;
Linux)
host_os=linux
;;
*)
kube::log::error "Unsupported host OS. Must be Linux or Mac OS X."
exit 1
;;
esac
echo "${host_os}"
}
kube::util::host_arch() {
local host_arch
case "$(uname -m)" in
x86_64*)
host_arch=amd64
;;
i?86_64*)
host_arch=amd64
;;
amd64*)
host_arch=amd64
;;
aarch64*)
host_arch=arm64
;;
arm64*)
host_arch=arm64
;;
arm*)
host_arch=arm
;;
i?86*)
host_arch=x86
;;
s390x*)
host_arch=s390x
;;
ppc64le*)
host_arch=ppc64le
;;
*)
kube::log::error "Unsupported host arch. Must be x86_64, 386, arm, arm64, s390x or ppc64le."
exit 1
;;
esac
echo "${host_arch}"
}
# This figures out the host platform without relying on golang. We need this as
# we don't want a golang install to be a prerequisite to building yet we need
# this info to figure out where the final binaries are placed.
kube::util::host_platform() {
echo "$(kube::util::host_os)/$(kube::util::host_arch)"
}
# looks for $1 in well-known output locations for the platform ($2)
# $KUBE_ROOT must be set
kube::util::find-binary-for-platform() {
local -r lookfor="$1"
local -r platform="$2"
local locations=(
"${KUBE_ROOT}/_output/bin/${lookfor}"
"${KUBE_ROOT}/_output/dockerized/bin/${platform}/${lookfor}"
"${KUBE_ROOT}/_output/local/bin/${platform}/${lookfor}"
"${KUBE_ROOT}/platforms/${platform}/${lookfor}"
)
# if we're looking for the host platform, add local non-platform-qualified search paths
if [[ "${platform}" = "$(kube::util::host_platform)" ]]; then
locations+=(
"${KUBE_ROOT}/_output/local/go/bin/${lookfor}"
"${KUBE_ROOT}/_output/dockerized/go/bin/${lookfor}"
);
fi
# looks for $1 in the $PATH
if which "${lookfor}" >/dev/null; then
local -r local_bin="$(which "${lookfor}")"
locations+=( "${local_bin}" );
fi
# List most recently-updated location.
local -r bin=$( (ls -t "${locations[@]}" 2>/dev/null || true) | head -1 )
if [[ -z "${bin}" ]]; then
kube::log::error "Failed to find binary ${lookfor} for platform ${platform}"
return 1
fi
echo -n "${bin}"
}
# looks for $1 in well-known output locations for the host platform
# $KUBE_ROOT must be set
kube::util::find-binary() {
kube::util::find-binary-for-platform "$1" "$(kube::util::host_platform)"
}
# Takes a group/version and returns the path to its location on disk, sans
# "pkg". E.g.:
# * default behavior: extensions/v1beta1 -> apis/extensions/v1beta1
# * default behavior for only a group: experimental -> apis/experimental
# * Special handling for empty group: v1 -> api/v1, unversioned -> api/unversioned
# * Special handling for groups suffixed with ".k8s.io": foo.k8s.io/v1 -> apis/foo/v1
# * Very special handling for when both group and version are "": / -> api
#
# $KUBE_ROOT must be set.
kube::util::group-version-to-pkg-path() {
local group_version="$1"
# Make a list of all know APIs by listing their dirs.
local apidirs=()
kube::util::read-array apidirs < <(
cd "${KUBE_ROOT}/staging/src/k8s.io/api" || return 1 # make shellcheck happy
find . -name types.go -exec dirname {} \; \
| sed "s|\./||g" \
| LC_ALL=C sort -u)
# Compare each API dir against the requested GV, and if we find it, no
# special handling needed.
for api in "${apidirs[@]}"; do
# Change "foo.bar.k8s.io/v1" -> "foo/v1" notation.
local simple_gv="${group_version/.*k8s.io/}"
if [[ "${api}" = "${simple_gv}" ]]; then
echo "staging/src/k8s.io/api/${simple_gv}"
return
fi
done
# "v1" is the API GroupVersion
if [[ "${group_version}" == "v1" ]]; then
echo "staging/src/k8s.io/api/core/v1"
return
fi
# Special cases first.
# TODO(lavalamp): Simplify this by moving pkg/api/v1 and splitting pkg/api,
# moving the results to pkg/apis/api.
case "${group_version}" in
# both group and version are "", this occurs when we generate deep copies for internal objects of the legacy v1 API.
__internal)
echo "pkg/apis/core"
;;
meta/v1)
echo "staging/src/k8s.io/apimachinery/pkg/apis/meta/v1"
;;
meta/v1beta1)
echo "staging/src/k8s.io/apimachinery/pkg/apis/meta/v1beta1"
;;
internal.apiserver.k8s.io/v1alpha1)
echo "staging/src/k8s.io/api/apiserverinternal/v1alpha1"
;;
*.k8s.io)
echo "pkg/apis/${group_version%.*k8s.io}"
;;
*.k8s.io/*)
echo "pkg/apis/${group_version/.*k8s.io/}"
;;
*)
echo "pkg/apis/${group_version%__internal}"
;;
esac
}
# Takes a group/version and returns the swagger-spec file name.
# default behavior: extensions/v1beta1 -> extensions_v1beta1
# special case for v1: v1 -> v1
kube::util::gv-to-swagger-name() {
local group_version="$1"
case "${group_version}" in
v1)
echo "v1"
;;
*)
echo "${group_version%/*}_${group_version#*/}"
;;
esac
}
# Returns the name of the upstream remote repository name for the local git
# repo, e.g. "upstream" or "origin".
kube::util::git_upstream_remote_name() {
git remote -v | grep fetch |\
grep -E 'github.com[/:]kubernetes/kubernetes|k8s.io/kubernetes' |\
head -n 1 | awk '{print $1}'
}
# Exits script if working directory is dirty. If it's run interactively in the terminal
# the user can commit changes in a second terminal. This script will wait.
kube::util::ensure_clean_working_dir() {
while ! git diff HEAD --exit-code &>/dev/null; do
echo -e "\nUnexpected dirty working directory:\n"
if tty -s; then
git status -s
else
git diff -a # be more verbose in log files without tty
exit 1
fi | sed 's/^/ /'
echo -e "\nCommit your changes in another terminal and then continue here by pressing enter."
read -r
done 1>&2
}
# Find the base commit using:
# $PULL_BASE_SHA if set (from Prow)
# current ref from the remote upstream branch
kube::util::base_ref() {
local -r git_branch=$1
if [[ -n ${PULL_BASE_SHA:-} ]]; then
echo "${PULL_BASE_SHA}"
return
fi
full_branch="$(kube::util::git_upstream_remote_name)/${git_branch}"
# make sure the branch is valid, otherwise the check will pass erroneously.
if ! git describe "${full_branch}" >/dev/null; then
# abort!
exit 1
fi
echo "${full_branch}"
}
# Checks whether there are any files matching pattern $2 changed between the
# current branch and upstream branch named by $1.
# Returns 1 (false) if there are no changes
# 0 (true) if there are changes detected.
kube::util::has_changes() {
local -r git_branch=$1
local -r pattern=$2
local -r not_pattern=${3:-totallyimpossiblepattern}
local base_ref
base_ref=$(kube::util::base_ref "${git_branch}")
echo "Checking for '${pattern}' changes against '${base_ref}'"
# notice this uses ... to find the first shared ancestor
if git diff --name-only "${base_ref}...HEAD" | grep -v -E "${not_pattern}" | grep "${pattern}" > /dev/null; then
return 0
fi
# also check for pending changes
if git status --porcelain | grep -v -E "${not_pattern}" | grep "${pattern}" > /dev/null; then
echo "Detected '${pattern}' uncommitted changes."
return 0
fi
echo "No '${pattern}' changes detected."
return 1
}
kube::util::download_file() {
local -r url=$1
local -r destination_file=$2
rm "${destination_file}" 2&> /dev/null || true
for i in $(seq 5)
do
if ! curl -fsSL --retry 3 --keepalive-time 2 "${url}" -o "${destination_file}"; then
echo "Downloading ${url} failed. $((5-i)) retries left."
sleep 1
else
echo "Downloading ${url} succeed"
return 0
fi
done
return 1
}
# Test whether openssl is installed.
# Sets:
# OPENSSL_BIN: The path to the openssl binary to use
function kube::util::test_openssl_installed {
if ! openssl version >& /dev/null; then
echo "Failed to run openssl. Please ensure openssl is installed"
exit 1
fi
OPENSSL_BIN=$(command -v openssl)
}
# Query the API server for client certificate authentication capabilities
function kube::util::test_client_certificate_authentication_enabled {
local output
kube::util::test_openssl_installed
output=$(echo \
| "${OPENSSL_BIN}" s_client -connect "127.0.0.1:${SECURE_API_PORT}" 2> /dev/null \
| grep -A3 'Acceptable client certificate CA names')
if [[ "${output}" != *"/CN=127.0.0.1"* ]] && [[ "${output}" != *"CN = 127.0.0.1"* ]]; then
echo "API server not configured for client certificate authentication"
echo "Output of from acceptable client certificate check: ${output}"
exit 1
fi
}
# creates a client CA, args are sudo, dest-dir, ca-id, purpose
# purpose is dropped in after "key encipherment", you usually want
# '"client auth"'
# '"server auth"'
# '"client auth","server auth"'
function kube::util::create_signing_certkey {
local sudo=$1
local dest_dir=$2
local id=$3
local purpose=$4
# Create client ca
${sudo} /usr/bin/env bash -e <<EOF
rm -f "${dest_dir}/${id}-ca.crt" "${dest_dir}/${id}-ca.key"
${OPENSSL_BIN} req -x509 -sha256 -new -nodes -days 365 -newkey rsa:2048 -keyout "${dest_dir}/${id}-ca.key" -out "${dest_dir}/${id}-ca.crt" -subj "/C=xx/ST=x/L=x/O=x/OU=x/CN=ca/emailAddress=x/"
echo '{"signing":{"default":{"expiry":"43800h","usages":["signing","key encipherment",${purpose}]}}}' > "${dest_dir}/${id}-ca-config.json"
EOF
}
# signs a client certificate: args are sudo, dest-dir, CA, filename (roughly), username, groups...
function kube::util::create_client_certkey {
local sudo=$1
local dest_dir=$2
local ca=$3
local id=$4
local cn=${5:-$4}
local groups=""
local SEP=""
shift 5
while [ -n "${1:-}" ]; do
groups+="${SEP}{\"O\":\"$1\"}"
SEP=","
shift 1
done
${sudo} /usr/bin/env bash -e <<EOF
cd ${dest_dir}
echo '{"CN":"${cn}","names":[${groups}],"hosts":[""],"key":{"algo":"rsa","size":2048}}' | ${CFSSL_BIN} gencert -ca=${ca}.crt -ca-key=${ca}.key -config=${ca}-config.json - | ${CFSSLJSON_BIN} -bare client-${id}
mv "client-${id}-key.pem" "client-${id}.key"
mv "client-${id}.pem" "client-${id}.crt"
rm -f "client-${id}.csr"
EOF
}
# signs a serving certificate: args are sudo, dest-dir, ca, filename (roughly), subject, hosts...
function kube::util::create_serving_certkey {
local sudo=$1
local dest_dir=$2
local ca=$3
local id=$4
local cn=${5:-$4}
local hosts=""
local SEP=""
shift 5
while [ -n "${1:-}" ]; do
hosts+="${SEP}\"$1\""
SEP=","
shift 1
done
${sudo} /usr/bin/env bash -e <<EOF
cd ${dest_dir}
echo '{"CN":"${cn}","hosts":[${hosts}],"key":{"algo":"rsa","size":2048}}' | ${CFSSL_BIN} gencert -ca=${ca}.crt -ca-key=${ca}.key -config=${ca}-config.json - | ${CFSSLJSON_BIN} -bare serving-${id}
mv "serving-${id}-key.pem" "serving-${id}.key"
mv "serving-${id}.pem" "serving-${id}.crt"
rm -f "serving-${id}.csr"
EOF
}
# creates a self-contained kubeconfig: args are sudo, dest-dir, ca file, host, port, client id, token(optional)
function kube::util::write_client_kubeconfig {
local sudo=$1
local dest_dir=$2
local ca_file=$3
local api_host=$4
local api_port=$5
local client_id=$6
local token=${7:-}
cat <<EOF | ${sudo} tee "${dest_dir}"/"${client_id}".kubeconfig > /dev/null
apiVersion: v1
kind: Config
clusters:
- cluster:
certificate-authority: ${ca_file}
server: https://${api_host}:${api_port}/
name: local-up-cluster
users:
- user:
token: ${token}
client-certificate: ${dest_dir}/client-${client_id}.crt
client-key: ${dest_dir}/client-${client_id}.key
name: local-up-cluster
contexts:
- context:
cluster: local-up-cluster
user: local-up-cluster
name: local-up-cluster
current-context: local-up-cluster
EOF
# flatten the kubeconfig files to make them self contained
username=$(whoami)
${sudo} /usr/bin/env bash -e <<EOF
$(kube::util::find-binary kubectl) --kubeconfig="${dest_dir}/${client_id}.kubeconfig" config view --minify --flatten > "/tmp/${client_id}.kubeconfig"
mv -f "/tmp/${client_id}.kubeconfig" "${dest_dir}/${client_id}.kubeconfig"
chown ${username} "${dest_dir}/${client_id}.kubeconfig"
EOF
}
# list_staging_repos outputs a sorted list of repos in staging/src/k8s.io
# each entry will just be the $repo portion of staging/src/k8s.io/$repo/...
# $KUBE_ROOT must be set.
function kube::util::list_staging_repos() {
(
cd "${KUBE_ROOT}/staging/src/k8s.io" && \
find . -mindepth 1 -maxdepth 1 -type d | cut -c 3- | sort
)
}
# Determines if docker can be run, failures may simply require that the user be added to the docker group.
function kube::util::ensure_docker_daemon_connectivity {
DOCKER_OPTS=${DOCKER_OPTS:-""}
IFS=" " read -ra docker_opts <<< "${DOCKER_OPTS}"
if ! docker "${docker_opts[@]:+"${docker_opts[@]}"}" info > /dev/null 2>&1 ; then
cat <<'EOF' >&2
Can't connect to 'docker' daemon. please fix and retry.
Possible causes:
- Docker Daemon not started
- Linux: confirm via your init system
- macOS w/ Docker for Mac: Check the menu bar and start the Docker application
- DOCKER_HOST hasn't been set or is set incorrectly
- Linux: domain socket is used, DOCKER_* should be unset. In Bash run `unset ${!DOCKER_*}`
- macOS w/ Docker for Mac: domain socket is used, DOCKER_* should be unset. In Bash run `unset ${!DOCKER_*}`
- Other things to check:
- Linux: User isn't in 'docker' group. Add and relogin.
- Something like 'sudo usermod -a -G docker ${USER}'
- RHEL7 bug and workaround: https://bugzilla.redhat.com/show_bug.cgi?id=1119282#c8
EOF
return 1
fi
}
# Wait for background jobs to finish. Return with
# an error status if any of the jobs failed.
kube::util::wait-for-jobs() {
local fail=0
local job
for job in $(jobs -p); do
wait "${job}" || fail=$((fail + 1))
done
return ${fail}
}
# kube::util::join <delim> <list...>
# Concatenates the list elements with the delimiter passed as first parameter
#
# Ex: kube::util::join , a b c
# -> a,b,c
function kube::util::join {
local IFS="$1"
shift
echo "$*"
}
# Downloads cfssl/cfssljson into $1 directory if they do not already exist in PATH
#
# Assumed vars:
# $1 (cfssl directory) (optional)
#
# Sets:
# CFSSL_BIN: The path of the installed cfssl binary
# CFSSLJSON_BIN: The path of the installed cfssljson binary
#
# shellcheck disable=SC2120 # optional parameters
function kube::util::ensure-cfssl {
if command -v cfssl &>/dev/null && command -v cfssljson &>/dev/null; then
CFSSL_BIN=$(command -v cfssl)
CFSSLJSON_BIN=$(command -v cfssljson)
return 0
fi
host_arch=$(kube::util::host_arch)
if [[ "${host_arch}" != "amd64" ]]; then
echo "Cannot download cfssl on non-amd64 hosts and cfssl does not appear to be installed."
echo "Please install cfssl and cfssljson and verify they are in \$PATH."
echo "Hint: export PATH=\$PATH:\$GOPATH/bin; go install github.com/cloudflare/cfssl/cmd/...@latest"
exit 1
fi
# Create a temp dir for cfssl if no directory was given
local cfssldir=${1:-}
if [[ -z "${cfssldir}" ]]; then
kube::util::ensure-temp-dir
cfssldir="${KUBE_TEMP}/cfssl"
fi
mkdir -p "${cfssldir}"
pushd "${cfssldir}" > /dev/null || return 1
echo "Unable to successfully run 'cfssl' from ${PATH}; downloading instead..."
kernel=$(uname -s)
case "${kernel}" in
Linux)
curl --retry 10 -L -o cfssl https://github.com/cloudflare/cfssl/releases/download/v1.5.0/cfssl_1.5.0_linux_amd64
curl --retry 10 -L -o cfssljson https://github.com/cloudflare/cfssl/releases/download/v1.5.0/cfssljson_1.5.0_linux_amd64
;;
Darwin)
curl --retry 10 -L -o cfssl https://github.com/cloudflare/cfssl/releases/download/v1.5.0/cfssl_1.5.0_darwin_amd64
curl --retry 10 -L -o cfssljson https://github.com/cloudflare/cfssl/releases/download/v1.5.0/cfssljson_1.5.0_darwin_amd64
;;
*)
echo "Unknown, unsupported platform: ${kernel}." >&2
echo "Supported platforms: Linux, Darwin." >&2
exit 2
esac
chmod +x cfssl || true
chmod +x cfssljson || true
CFSSL_BIN="${cfssldir}/cfssl"
CFSSLJSON_BIN="${cfssldir}/cfssljson"
if [[ ! -x ${CFSSL_BIN} || ! -x ${CFSSLJSON_BIN} ]]; then
echo "Failed to download 'cfssl'. Please install cfssl and cfssljson and verify they are in \$PATH."
echo "Hint: export PATH=\$PATH:\$GOPATH/bin; go install github.com/cloudflare/cfssl/cmd/...@latest"
exit 1
fi
popd > /dev/null || return 1
}
# kube::util::ensure-docker-buildx
# Check if we have "docker buildx" commands available
#
function kube::util::ensure-docker-buildx {
# podman returns 0 on `docker buildx version`, docker on `docker buildx`. One of them must succeed.
if docker buildx version >/dev/null 2>&1 || docker buildx >/dev/null 2>&1; then
return 0
else
echo "ERROR: docker buildx not available. Docker 19.03 or higher is required with experimental features enabled"
exit 1
fi
}
# kube::util::ensure-bash-version
# Check if we are using a supported bash version
#
function kube::util::ensure-bash-version {
# shellcheck disable=SC2004
if ((${BASH_VERSINFO[0]}<4)) || ( ((${BASH_VERSINFO[0]}==4)) && ((${BASH_VERSINFO[1]}<2)) ); then
echo "ERROR: This script requires a minimum bash version of 4.2, but got version of ${BASH_VERSINFO[0]}.${BASH_VERSINFO[1]}"
if [ "$(uname)" = 'Darwin' ]; then
echo "On macOS with homebrew 'brew install bash' is sufficient."
fi
exit 1
fi
}
# kube::util::ensure-gnu-sed
# Determines which sed binary is gnu-sed on linux/darwin
#
# Sets:
# SED: The name of the gnu-sed binary
#
function kube::util::ensure-gnu-sed {
# NOTE: the echo below is a workaround to ensure sed is executed before the grep.
# see: https://github.com/kubernetes/kubernetes/issues/87251
sed_help="$(LANG=C sed --help 2>&1 || true)"
if echo "${sed_help}" | grep -q "GNU\|BusyBox"; then
SED="sed"
elif command -v gsed &>/dev/null; then
SED="gsed"
else
kube::log::error "Failed to find GNU sed as sed or gsed. If you are on Mac: brew install gnu-sed." >&2
return 1
fi
kube::util::sourced_variable "${SED}"
}
# kube::util::ensure-gnu-date
# Determines which date binary is gnu-date on linux/darwin
#
# Sets:
# DATE: The name of the gnu-date binary
#
function kube::util::ensure-gnu-date {
# NOTE: the echo below is a workaround to ensure date is executed before the grep.
# see: https://github.com/kubernetes/kubernetes/issues/87251
date_help="$(LANG=C date --help 2>&1 || true)"
if echo "${date_help}" | grep -q "GNU\|BusyBox"; then
DATE="date"
elif command -v gdate &>/dev/null; then
DATE="gdate"
else
kube::log::error "Failed to find GNU date as date or gdate. If you are on Mac: brew install coreutils." >&2
return 1
fi
kube::util::sourced_variable "${DATE}"
}
# kube::util::check-file-in-alphabetical-order <file>
# Check that the file is in alphabetical order
#
function kube::util::check-file-in-alphabetical-order {
local failure_file="$1"
if ! diff -u "${failure_file}" <(LC_ALL=C sort "${failure_file}"); then
{
echo
echo "${failure_file} is not in alphabetical order. Please sort it:"
echo
echo " LC_ALL=C sort -o ${failure_file} ${failure_file}"
echo
} >&2
false
fi
}
# kube::util::require-jq
# Checks whether jq is installed.
function kube::util::require-jq {
if ! command -v jq &>/dev/null; then
kube::log::error "jq not found. Please install."
return 1
fi
}
# outputs md5 hash of $1, works on macOS and Linux
function kube::util::md5() {
if which md5 >/dev/null 2>&1; then
md5 -q "$1"
else
md5sum "$1" | awk '{ print $1 }'
fi
}
# kube::util::read-array
# Reads in stdin and adds it line by line to the array provided. This can be
# used instead of "mapfile -t", and is bash 3 compatible. If the named array
# exists and is an array, it will be overwritten. Otherwise it will be unset
# and recreated.
#
# Assumed vars:
# $1 (name of array to create/modify)
#
# Example usage:
# kube::util::read-array files < <(ls -1)
#
# When in doubt:
# $ W=abc # a string
# $ X=(a b c) # an array
# $ declare -A Y # an associative array
# $ unset Z # not set at all
# $ declare -p W X Y Z
# declare -- W="abc"
# declare -a X=([0]="a" [1]="b" [2]="c")
# declare -A Y
# bash: line 26: declare: Z: not found
# $ kube::util::read-array W < <(echo -ne "1 1\n2 2\n3 3\n")
# bash: W is defined but isn't an array
# $ kube::util::read-array X < <(echo -ne "1 1\n2 2\n3 3\n")
# $ kube::util::read-array Y < <(echo -ne "1 1\n2 2\n3 3\n")
# bash: Y is defined but isn't an array
# $ kube::util::read-array Z < <(echo -ne "1 1\n2 2\n3 3\n")
# $ declare -p W X Y Z
# declare -- W="abc"
# declare -a X=([0]="1 1" [1]="2 2" [2]="3 3")
# declare -A Y
# declare -a Z=([0]="1 1" [1]="2 2" [2]="3 3")
function kube::util::read-array {
if [[ -z "$1" ]]; then
echo "usage: ${FUNCNAME[0]} <varname>" >&2
return 1
fi
if [[ -n $(declare -p "$1" 2>/dev/null) ]]; then
if ! declare -p "$1" 2>/dev/null | grep -q '^declare -a'; then
echo "${FUNCNAME[0]}: $1 is defined but isn't an array" >&2
return 2
fi
fi
# shellcheck disable=SC2034 # this variable _is_ used
local __read_array_i=0
while IFS= read -r "$1[__read_array_i++]"; do :; done
if ! eval "[[ \${$1[--__read_array_i]} ]]"; then
unset "$1[__read_array_i]" # ensures last element isn't empty
fi
}
# kube::util::run-in
# Changes directory to "$1", runs the rest of the arguments, and restores the initial directory
# Returns 1 if a directory change fails, the result of running the arguments otherwise
function kube::util::run-in {
pushd "$1" > /dev/null || return 1
shift
"$@"
local result=$?
popd > /dev/null || return 1
return $result
}
# Some useful colors.
if [[ -z "${color_start-}" ]]; then
declare -r color_start="\033["
declare -r color_red="${color_start}0;31m"
declare -r color_yellow="${color_start}0;33m"
declare -r color_green="${color_start}0;32m"
declare -r color_blue="${color_start}1;34m"
declare -r color_cyan="${color_start}1;36m"
declare -r color_norm="${color_start}0m"
kube::util::sourced_variable "${color_start}"
kube::util::sourced_variable "${color_red}"
kube::util::sourced_variable "${color_yellow}"
kube::util::sourced_variable "${color_green}"
kube::util::sourced_variable "${color_blue}"
kube::util::sourced_variable "${color_cyan}"
kube::util::sourced_variable "${color_norm}"
fi
# ex: ts=2 sw=2 et filetype=sh
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