npbackup/RESTIC_SOURCE_FILES/update_restic.sh

#!/usr/bin/env bash

# Quick script to update restic binaries

export ORG=restic
export REPO=restic
LATEST_VERSION=$(curl -s https://api.github.com/repos/${ORG}/${REPO}/releases/latest | grep "tag_name" | cut -d'"' -f4)
echo Latest restic version ${LATEST_VERSION}

errors=false

if [[ $(uname -s) == *"CYGWIN"* ]]; then
	platforms=(windows_amd64 windows_386)
else
	platforms=(linux_arm linux_arm64 linux_amd64 darwin_amd64 freebsd_amd64)
fi

for platform in "${platforms[@]}"; do
	echo "Checking for ${platform}"
	restic_filename="restic_${LATEST_VERSION//v}_${platform}"
	if [ ! -f "${restic_filename}" ]; then
		echo "Moving earlier version to archive"
		[ -d ARCHIVES ] || mkdir ARCHIVES
		mv -f restic_*_${platform} ARCHIVES/ > /dev/null 2>&1
		# Move all except restic legacy binary
		mv -f !(restic_0.16.2_${platform}.exe) ARCHIVES/ > /dev/null 2>&1
		# Avoid moving restic
		echo "Downloading ${restic_filename}"
	if [ "${platform:0:7}" == "windows" ]; then
		ext=zip
	else
		ext=bz2
	fi
		curl -OL https://github.com/restic/restic/releases/download/${LATEST_VERSION}/restic_${LATEST_VERSION//v}_{$platform}.${ext}
		if [ $? -ne 0 ]; then
			echo "Failed to download ${restic_filename}"
				errors=true
		else
				if [ -f "${restic_filename}.bz2" ]; then
					bzip2 -d "${restic_filename}.bz2" && chmod +x "${restic_filename}"
		elif [ -f "${restic_filename}.zip" ]; then
			unzip "${restic_filename}.zip"
		else
			echo "Archive ${restic_filename} not found"
			errors=true
		fi
			if [ $? -ne 0 ]; then
					echo "Failed to decompress ${restic_filename}.bz2"
					errors=true
			fi
		[ -f "${restic_filename}.zip" ] && rm -f "${restic_filename}.zip"
		fi
	fi
done

if [ "${errors}" = true ]; then
	echo "Errors occurred during update"
	exit 1
else
	echo "Finished updating restic binaries"
fi