Compression scripts

compress.sh

#!/usr/bin/env bash
# Compresses all input files into a single archive
7za a -m0=lzma2 -ms=on -mfb=273 -md=1536m -mmt=on archive.7z *.ext

extract-shiftjis-zip.sh

#!/usr/bin/env bash
# Extracts zips with shift-jis encoded filenames, using mvconv to convert to utf8 in most cases
env LANG=C 7z x "archive.zip"
convmv -f shift-jis -t utf8 --notest -r "extracted"

parallel-compress.sh

#!/usr/bin/env bash
# Uses parallel and 7za to compress files (one archive per file)
# Jobs are limited to half of the available CPU cores as LZMA2 uses two threads for compression
parallel -j50% 7za a -m0=lzma2 -ms=on -mfb=273 -md=1536m -mmt=on {.}.7z {} ::: *.ext

parallel-repack.sh

#!/usr/bin/env bash
# Uses parallel and arepack to recompress zip and rar archives in parallel
# Jobs are limited to half of the available CPU cores as LZMA2 uses two threads for compression
parallel -j50% arepack --each --format=7z -O-m0=lzma2 -O-ms=on -O-mfb=273 -O-md=1536m -O-mmt=on {} ::: *.{rar,zip}