install

#!/bin/bash

LATEST=$(curl --silent "https://api.github.com/repos/Scurrra/docsync-cli/releases/latest" | grep '"tag_name":' | sed -E 's/.*"([^"]+)".*/\1/')
RELEASE=${1:-$LATEST}
VERSION="${RELEASE//v}"
TMP_DIR="/tmp/tmpinstalldir"
OUT_DIR=${2:-"/usr/local/bin"}
check_mark="\033[1;32m✓\033[0m"


echo -e "
👋 This script will download docsync to \033[4m/usr/local/bin/docsync\033[0m
   If you get 'permission denied' error:
   - Specify other dir and version: \033[4mcurl -fsSL https://github.com/Scurrra/docsync/blob/master/install | bash -s -- $RELEASE $HOME/.local/bin\033[0m
   - Or change the owner of $OUT_DIR to your user
"
set -e

function cleanup {
	echo rm -rf $TMP_DIR > /dev/null
}
function header() {
  echo -e "\n\033[1m$1\033[0m";
}
function fail {
	cleanup
	msg=$1
	echo "============"
	echo "Error: $msg" 1>&2
	exit 1
}
function install {
  set -e
	USER="Scurrra"
	PROG="docsync"
	INSECURE="false"
	#bash check
	[ ! "$BASH_VERSION" ] && fail "Please use bash instead"
	[ ! -d $OUT_DIR ] && fail "output directory missing: $OUT_DIR"
	#dependency check, assume we are a standard POSIX machine
	which find > /dev/null || fail "find not installed"
	which xargs > /dev/null || fail "xargs not installed"
	which sort > /dev/null || fail "sort not installed"
	which tail > /dev/null || fail "tail not installed"
	which cut > /dev/null || fail "cut not installed"
	which du > /dev/null || fail "du not installed"
	GET=""
	if which curl > /dev/null; then
		GET="curl"
		if [[ $INSECURE = "true" ]]; then GET="$GET --insecure"; fi
		GET="$GET --fail -# -L"
	elif which wget > /dev/null; then
		GET="wget"
		if [[ $INSECURE = "true" ]]; then GET="$GET --no-check-certificate"; fi
		GET="$GET -qO-"
	else
		fail "neither wget/curl are installed"
	fi
	case $(uname -s) in
	Darwin) OS="darwin";;
	Linux) OS="linux";;
	*) fail "unknown os: $(uname -s)";;
	esac
	#find ARCH
	if uname -m | grep 64 > /dev/null; then
		ARCH="amd64"
	elif uname -m | grep arm > /dev/null; then
		ARCH="arm"
	else
		fail "unknown arch: $(uname -m)"
	fi
	URL=""
	FTYPE=""
	case "${OS}_${ARCH}" in
	"darwin_arm")
		URL="https://github.com/Scurrra/docsync/releases/download/$RELEASE/docsync_${VERSION}_Darwin_arm64.tar.gz"
		FTYPE=".tar.gz"
		;;
	"darwin_amd64")
		URL="https://github.com/Scurrra/docsync/releases/download/$RELEASE/docsync_${VERSION}_Darwin_x86_64.tar.gz"
		FTYPE=".tar.gz"
		;;
	"linux_arm")
		URL="https://github.com/Scurrra/docsync/releases/download/$RELEASE/docsync_${VERSION}_Linux_arm64.tar.gz"
		FTYPE=".tar.gz"
		;;
	"linux_amd64")
		URL="https://github.com/Scurrra/docsync/releases/download/$RELEASE/docsync_${VERSION}_Linux_x86_64.tar.gz"
		FTYPE=".tar.gz"
		;;
	*) fail "No asset for platform ${OS}-${ARCH}";;
	esac
	#got URL! download it...

	echo -e "\033[0;90m\nInstalling $PROG ($RELEASE)... \033[0\n"

	#enter tempdir
	mkdir -p $TMP_DIR
	cd $TMP_DIR || exit
	if [[ $FTYPE = ".gz" ]]; then
		which gzip > /dev/null || fail "gzip is not installed"
		#gz download!
		bash -c "$GET $URL" | gzip -d - > $PROG || fail "download failed"
	elif [[ $FTYPE = ".tar.gz" ]] || [[ $FTYPE = ".tgz" ]]; then
		#check if archiver progs installed
		which tar > /dev/null || fail "tar is not installed"
		which gzip > /dev/null || fail "gzip is not installed"
		bash -c "$GET $URL" | tar zxf - > /dev/null || fail "download failed"
	elif [[ $FTYPE = ".zip" ]]; then
		which unzip > /dev/null || fail "unzip is not installed"
		bash -c "$GET $URL" > tmp.zip || fail "download failed"
		unzip -o -qq tmp.zip || fail "unzip failed"
		rm tmp.zip || fail "cleanup failed"
	elif [[ $FTYPE = "" ]]; then
		bash -c "$GET $URL" > "docsync_${OS}_${ARCH}" || fail "download failed"
	else
		fail "unknown file type: $FTYPE"
	fi
	TMP_BIN=$(find . -type f | xargs du | sort -n | tail -n 1 | cut -f 2)
	if [ ! -f "$TMP_BIN" ]; then
		fail "could not find find binary (largest file)"
	fi
	if [[ $(du -m "$TMP_BIN" | cut -f1) -lt 1 ]]; then
		fail "no binary found ($TMP_BIN is not larger than 1MB)"
	fi
	chmod +x "$TMP_BIN" || fail "chmod +x failed"
	mv "$TMP_BIN" "$OUT_DIR"/$PROG || fail "mv failed" #FINAL STEP!
	echo -e "$ docsync --help " && "$OUT_DIR/$PROG" --help
	echo -e "${check_mark} Installed at $OUT_DIR/$PROG"
	cleanup
	header "Next steps\n"
  echo -e "‣ \033[1mInitialize docsync in a project\033[0m"
  echo -e "   \033[0;90m\033[0;33mcd\033[0;90m to the project you want to set up docsync with and run \033[0;33mdocsync init\033[0;90m\033[0m\n"
}

install