rsync makefile for general purpose sync and backups

Makefile

# Makefile
# 
# For syncing the current directory with a remote using rsync
#
# Author: maxprehl
#
# Refs: 
# https://www.gnu.org/software/make/manual/html_node/index.html#Top
# https://www.man7.org/linux/man-pages/man1/rsync.1.html
# https://www.reddit.com/r/DataHoarder/comments/sixnp0/i_was_told_i_belong_here/

# Structure
# ---------
# Local Dir
# \--- your data here
#
# Remote Dir
# +--- current
# |    \--- your data here
# +--- backup
# |    \--- 2022-02-04__1643971072
# |         \--- incremental backup tree (rsync --backup-dir)
# \--- rsync.log

# Usage
# -----
# Remote-local sync:
# make sync
#
# Sync dry run:
# make drysync
#
# Update remote to match local exactly (delete stuff):
# make delete
#
# Full list of options:
# get pull put push sync dry debug
# dry drypull drypush drysync drydel

mkfile_path := $(abspath $(lastword $(MAKEFILE_LIST)))
current_dir := $(notdir $(patsubst %/,%,$(dir $(mkfile_path))))
date := $(shell date '+%Y-%m-%d_%s')

HOST := pop.p
ROOT := $$HOME/Sync

REMOTE_DIR := $(ROOT)/$(current_dir)

REMOTE_BAK := $(REMOTE_DIR)/backup/$(date)
REMOTE_LOG := $(REMOTE_DIR)/rsync.log
REMOTE := $(HOST):$(REMOTE_DIR)/current/

LOCAL := ./
# LOCAL_LOG := 

PARAMS := --verbose --compress --recursive --times --human-readable
PARAMS += --exclude-from='./.rsyncignore'

BACKUP := --backup --backup-dir=$(REMOTE_BAK)
LOGFILE := --remote-option=--log-file=$(REMOTE_LOG)

MAIN := $(PARAMS) $(BACKUP) $(LOGFILE)

.PHONY: dry drypull drypush drysync drydel drydelete get pull put push sync dry delete debug prep

dry drypull drypush drysync drydel: MAIN += --dry-run
dry : debug

drypull: pull
drypush: push
drysync: sync
drydel drydelete: delete

put push get pull : MAIN += --update

sync: get put

put push: .rsyncignore
	rsync $(MAIN) $(LOCAL) $(REMOTE)

get pull: .rsyncignore
	rsync $(MAIN) $(REMOTE) $(LOCAL)

delete: .rsyncignore
	rsync $(MAIN) --delete $(LOCAL) $(REMOTE)

debug:
	# mkfile_path=$(mkfile_path)
	# current_dir=$(current_dir)
	# REMOTE_BAK=$(REMOTE_BAK)
	# REMOTE_LOG=$(REMOTE_LOG)
	# REMOTE=$(REMOTE)
	# LOCAL=$(LOCAL)
	# MAIN=$(MAIN)

prep:
	ssh $(HOST) "mkdir -p $(REMOTE_DIR) && mkdir -p $(REMOTE_DIR)/current && mkdir -p $(REMOTE_DIR)/backup && touch $(REMOTE_LOG)"

Replace HOST and ROOT with your own backup server info. Then copy this makefile in any folder that needs backing up.

Note: you do need to create the basic structure on the server for rsync to work. It cannot create it's own logfile, backup dir, or current dir.

Update: added a prep target that sets up the structure for you.