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adamhotep/replaygain

Created September 22, 2020 22:02
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Revisions

  1. adamhotep created this gist Sep 22, 2020.
    86 changes: 86 additions & 0 deletions replaygain
    View file
    Original file line number Diff line number Diff line change
    @@ -0,0 +1,86 @@
    #!/bin/bash
    # This is a wrapper that adds one option to rgain3's replaygain script
    # replaygain-wrapper version 0.1, Copyright (C) 2020+ by Adam Katz <@adamhotep>
    #
    # This program is free software; you can redistribute it and/or
    # modify it under the terms of the GNU General Public License
    # as published by the Free Software Foundation; either version 2
    # of the License, or (at your option) any later version.
    #
    # This program is distributed in the hope that it will be useful,
    # but WITHOUT ANY WARRANTY; without even the implied warranty of
    # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
    # GNU General Public License for more details.
    #
    # Full license: https://www.gnu.org/licenses/old-licenses/gpl-2.0.html

    real="/usr/bin/replaygain"

    help() {
    "$real" --help
    echo " -t, --preserve-times Keep files' original timestamps"
    echo " -x, --executable=FILE Use this instead of '$real'"
    exit
    }

    # the revised list of arguments (for the real program)
    args=()

    while getopts dfhr:tx:-: OPT; do
    # support long options: https://stackoverflow.com/a/28466267/519360
    if [ "$OPT" = - ]; then
    OPT="${OPTARG%%=*}" OPTARG="${OPTARG#$OPT}" OPTARG="${OPTARG#=}"
    fi
    case $OPT in
    ( d | dry-run )
    args+=(--dry-run)
    NO_OP=true ;;
    ( h | help )
    help ;;
    ( show )
    args+=(--show)
    NO_OP=true ;;
    ( t | preserve-time* )
    PRESERVE_TIMES=true ;;
    ( x | exe* )
    real="$OPTARG" ;;
    ( ??* ) # other long option
    if [ -z "$OPTARG" ]
    then args+=("--$OPT")
    else args+=("--$OPT=$OPTARG")
    fi
    ;;
    ( * ) # other short option
    args+=("-$OPT")
    if [ -n "$OPTARG" ]; then args+=("$OPTARG"); fi
    esac
    done
    # remove options as originally provided, then prepend revised list (if any)
    shift $((OPTIND-1))
    set -- ${args+"${args[@]}"} "$@"

    if [ "$NO_OP" = true ]; then
    PRESERVE_TIMES=false
    elif [ "$PRESERVE_TIMES" = true ]; then
    TMP="$(mktemp ${TMPDIR:-/tmp}/rgain.$$.XXXXX.sh)"
    trap "rm -f $TMP" 0 1 2 5 9 11 15 18
    if stat -c %Y / >/dev/null 2>&1; then # GNU coreutils (stat & date)
    when() { date -d@"$(stat -c %Y "$@")" +%Y%m%d%H%M.%S; }
    else # BSD stat & date
    when() { date -jf %s "$(stat -f %m "$@")" +%Y%m%d%H%M.%S; }
    fi
    for input in "$@"; do
    echo "$(when "$input")=$input" >> $TMP
    done
    fi

    "$real" "$@"
    retval=$?

    if [ "$PRESERVE_TIMES" = true ]; then
    cat $TMP | while IFS= read -r line; do
    touch -t "${line%%=*}" "${line#*=}"
    done
    fi

    exit $retval