busybox readlink does not support '-m'

[waja]

Alpine (and others) ship with busybox.

$ /opt/calcardbackup/calcardbackup -h 
readlink: unrecognized option: m
BusyBox v1.27.2 (2017-12-12 10:41:50 GMT) multi-call binary.

Usage: readlink [-fnv] FILE

Display the value of a symlink

	-f	Canonicalize by following all symlinks
	-n	Don't add newline
	-v	Verbose
calcardbackup version 0.3.1 (06.02.2018), AGPL-3.0
Usage: ./calcardbackup [DIRECTORY] [option [argument]] [option [argument]] [option [argument]] ...
Find more details in attached file 'README.md' or visit 'https://github.com/BernieO/calcardbackup'

# readlink -h
readlink: unrecognized option: h
BusyBox v1.25.1 (2018-01-25 21:40:40 CET) multi-call binary.

Usage: readlink [-fnv] FILE

Display the value of a symlink

	-f	Canonicalize by following all symlinks
	-n	Don't add newline
	-v	Verbose

[BernieO]

Thanks for reporting this. Could you check whether the latest commit in the testing-branch solves the issue?
f44d8bd

[waja]

$ docker run --rm -it waja/calcardbackup /opt/calcardbackup/calcardbackup -h
calcardbackup version pre-0.3.2 (13.02.2018), AGPL-3.0
Usage: ./calcardbackup [DIRECTORY] [option [argument]] [option [argument]] [option [argument]] ...
Find more details in attached file 'README.md' or visit 'https://github.com/BernieO/calcardbackup'
$ docker run --rm -it waja/calcardbackup readlink -h
readlink: unrecognized option: h
BusyBox v1.27.2 (2017-12-12 10:41:50 GMT) multi-call binary.

Usage: readlink [-fnv] FILE

Display the value of a symlink

	-f	Canonicalize by following all symlinks
	-n	Don't add newline
	-v	Verbose

Looks great!

[BernieO]

version 0.3.2 with these changes released:
58d8ffd
So this can be closed.