backup-excludes

.gvfs
.mozilla
.gradle/wrapper
.gradle/caches
.gradle/daemon
.gradle/native
.local/share/Trash
.local/share/Steam
cache
caches
.cache
Cache
build
target
out

backup.sh

#!/usr/bin/env bash

# fail on any error:
set -e

function doBackup {
	# Get the included folders from arg array:
	local -n inc=$1
	# get the output file from args:
	out=$2

	# create the out dir if not exists
    mkdir -p "${out%/*}"

	echo "Backing up folders (${inc[@]}) to: $out ..."

	printf "> Estimating size..."
	SIZE=$(tar -c --one-file-system -C / \
			--exclude-backups \
			--exclude-caches \
			--exclude-from="$BACKUP_DIR/backup-excludes" \
			--exclude-tag='.nobackup' \
			--exclude-vcs-ignores \
	        ${inc[@]} \
			| wc -c)
	printf "\rEstimated size of backup: `numfmt --to=iec $SIZE`\n"

	SIZEARG="-s $SIZE"

	tar -cpf - --one-file-system -C / \
			--exclude-backups \
			--exclude-caches \
			--exclude-from="$BACKUP_DIR/backup-excludes" \
			--exclude-tag='.nobackup' \
			--exclude-vcs-ignores \
	        ${inc[@]} \
	        | pv $SIZEARG \
	        | pigz > "$out"

    echo "Compressed size: `du -h "$out"`"
    echo "Done."
}

# Get the backup folder location:
BACKUP_DIR="$( cd $( dirname "${BASH_SOURCE[0]}" ) > /dev/null && pwd )"
# Get the date:
DATE=$(date --iso-8601=seconds)

if [[ $1 == "test" ]]; then
    INC=(etc root)
    doBackup INC "${BACKUP_DIR}/test backups/$DATE-test.tar.gz"
    exit
fi

INC=(home opt etc root)
doBackup INC "${BACKUP_DIR}/manual-backups/$DATE-files.tar.gz"