Open archives with the Audacious media player

audacious-extract

#!/bin/sh

set -eu
exclude="txt|nfo|bat|c|usflib|psflib"

invoke="$(basename "$0")"
if [ -d "$XDG_RUNTIME_DIR" ]; then
  dest="$XDG_RUNTIME_DIR/$invoke"
else
  dest="/tmp/$invoke-$USER"
fi
playlist="$dest/$invoke.m3u"

usage() {
  cat <<USAGE
  Usage: $invoke ARCHIVE1 [ARCHIVE2]...

Extracts archives containing audio files using atool to temporary directory
$dest and enqueues the contents.

Archives containing playlists will enqueue the playlist contents instead of
the files.

USAGE
}

if \! &>/dev/null command -v aunpack; then
  usage
  echo >&2 "The atool utility is required."
  exit 2
fi
if [ $# -lt 1 ]; then
  usage
  echo >&2 "At least one archive is required."
  exit 127
fi

test -d "$dest" && rm -r "$dest"
(umask 077 && mkdir "$dest")

# atool does not support:
# aunpack --quiet --each --subdir --extract-to="$dest" -- "$@"

# Assemble a playlist dynamically.
for arch in "$@"; do
  # Extract archive to its own subdir.
  dir="$dest/$(basename "$arch").d"
  aunpack --quiet --extract-to="$dir" -- "$arch"

  # shellcheck disable=SC2016
  archlists="$(find "$dir" -type f -regextype egrep -iregex '.+\.(pls|m3u)' \
    -print0 | xargs -0 awk -v subdir="$dir/" '{print subdir $0}' )"
  if [ -n "$archlists" ]; then
    # If playlists are in the archive, append their contents
    echo "$archlists" >>"$playlist"
  else
    # otherwise sort and append all audio files from the archive.
    find "$dir" -type f -regextype egrep ! -iregex ".+\.($exclude)" \
      -print | sort >>"$playlist"
  fi
done

audacious --enqueue-to-temp "$playlist"

Discussion:
https://ncoop.github.io/2016/07/23/enqueuing-archives-with-audacious-media-player