bin/ecompress: add lz4 command line options

[rndxelement]

Calling lz4 with mutliple files results in
warnings of the form:

Warning : <path>/<file> won't be used ! Do you want multiple input files (-m) ?

Adding the -m option to the lz4 call
resolves this issue.
Additionally, the --rm option will remove
the source files after a successful compression.

Bug: https://bugs.gentoo.org/672916
Signed-off-by: Philipp Rösner rndxelement@protonmail.com

[floppym]

From the lz4 man page:

       -m --multiple
              Multiple input files. Compressed file names will be appended a  .lz4  suffix.  This
              mode  also reduces notification level. Can also be used to list multiple files. lz4
              -m has a behavior equivalent to gzip -k (it preserves source files by default).

Do we also need to add --rm to delete the uncompressed file after successful compression?

[rndxelement]

From the lz4 man page:

       -m --multiple
              Multiple input files. Compressed file names will be appended a  .lz4  suffix.  This
              mode  also reduces notification level. Can also be used to list multiple files. lz4
              -m has a behavior equivalent to gzip -k (it preserves source files by default).

Do we also need to add --rm to delete the uncompressed file after successful compression?

Thanks. I added it.
Also from the lz4 man page:

•   lz4 preserves original files
•   It´s possible to opt-in to erase source files on successful compression or decompression, using --rm command.
•   Consequently, lz4 -m --rm behaves the same as gzip.

[floppym]

I'll merge this once CI finishes.