build: introduce caimake to build (#36)

.caimake/update.sh

@@ -0,0 +1,107 @@
+#!/bin/bash
+
+# Exit on error. Append "|| true" if you expect an error.
+set -o errexit
+# Do not allow use of undefined vars. Use ${VAR:-} to use an undefined VAR
+set -o nounset
+# Catch the error in pipeline.
+set -o pipefail
+
+# Controls verbosity of the script output and logging.
+VERBOSE="${VERBOSE:-5}"
+
+# If set true, the log will be colorized
+readonly COLOR_LOG=${COLOR_LOG:-true}
+
+readonly CAIMAKE_HOME=${CAIMAKE_HOME:-${HOME}/.caimake}
+
+readonly CAIMAKE_AUTO_UPDATE=${CAIMAKE_AUTO_UPDATE:-false}
+
+readonly project="caicloud/build-infra"
+
+if [[ ${COLOR_LOG} == "true" ]]; then
+	readonly blue="\033[34m"
+	readonly green="\033[32m"
+	readonly red="\033[31m"
+	readonly yellow="\033[36m"
+	readonly strong="\033[1m"
+	readonly reset="\033[0m"
+else
+	readonly blue=""
+	readonly green=""
+	readonly red=""
+	readonly yellow=""
+	readonly strong=""
+	readonly reset=""
+fi
+
+# Print a status line.  Formatted to show up in a stream of output.
+log::status() {
+	local V="${V:-0}"
+	if [[ $VERBOSE < $V ]]; then
+		return
+	fi
+
+	timestamp=$(date +"[%m%d %H:%M:%S]")
+	echo -e "${blue}==> $timestamp${reset} ${strong}$1${reset}"
+	shift
+	for message; do
+		echo "    $message"
+	done
+}
+
+# Log an error but keep going.  Don't dump the stack or exit.
+log::error() {
+	timestamp=$(date +"[%m%d %H:%M:%S]")
+	echo -e "${red}!!! $timestamp${reset} ${strong}${1-}${reset}"
+	shift
+	for message; do
+		echo "    $message"
+	done
+}
+
+command_exists() {
+	command -v "$@" >/dev/null 2>&1
+}
+
+caimake::update() {
+	mkdir -p ${CAIMAKE_HOME}
+
+	if ! command_exists caimake; then
+		# add CAIMAKE_HOME to PATH
+		export PATH=${CAIMAKE_HOME}:${PATH}
+		if ! command_exists caimake; then
+			# check again
+			caimake::download_binary
+		fi
+	fi
+
+	if [[ ${CAIMAKE_AUTO_UPDATE-} == "true" ]]; then
+		caimake update
+	fi
+}
+
+caimake::get_version_from_url() {
+	local url=${1-}
+	local version=${url##*/releases/download/}
+	version=${version%/*}
+	echo ${version}
+}
+
+caimake::download_binary() {
+	local hostos="$(uname -s | tr '[A-Z]' '[a-z]')"
+	local latest="$(curl -s https://api.github.com/repos/${project}/releases/latest | grep browser_download_url | cut -d '"' -f 4 | grep -m 1 ${hostos})"
+	local version="$(caimake::get_version_from_url ${latest-})"
+
+	if [[ -z ${version} ]]; then
+		# no release found on github
+		log::error "No caimake release found on Github"
+		exit 1
+	fi
+
+	log::status "Latest caimake release on Github is ${version}"
+
+	curl -L ${latest} -o ${CAIMAKE_HOME}/caimake.temp
+	mv ${CAIMAKE_HOME}/caimake.temp ${CAIMAKE_HOME}/caimake
+	chmod +x ${CAIMAKE_HOME}/caimake
+}