new-session-manager/remove-unused-sources

#!/bin/sh

## remove-unused-sources
#
# April 2008, Jonathan Moore Liles
#
# Simple script to scan a compacted Non-DAW session and remove all
# unused sources from disk.
#
# USAGE:
#
#     $ remove-unused-sources ~/audio/'The Best Song Ever'
#
# NOTES:
#
#     This script will not ask for comfirmation! It will ruthlessly
#     delete all unused sources! You have been warned.
#

SESSION="$1"

fatal ()
{
    echo Error: "$1"
    echo 'Aborting!'
    cleanup
    exit 1
}

set_diff ()
{
	diff --new-line-format '' --old-line-format '%L' --unchanged-line-format '' "$1" "$2"
}

remove_sources ()
{
    local FILE
    while read FILE
    do
        echo "Removing source \"${FILE}\"..."

        rm -f ./"${FILE}" ./"${FILE}-"*.peak
    done
}

cleanup ()
{
    rm -f "${TEMP}/all-sources" "${TEMP}/used-sources"
}

cd "$SESSION" || fatal "No such session"

[ -f history ] || fatal "Not a Non-DAW session?"

grep -qv 'create' history && fatal "Not a compacted session"

echo "Scanning \"${SESSION}\"..."

sed -n 's/^Region.* :source "\([^"]\+\)".*$/\1/p' history | sort | uniq > "${TEMP}/used-sources"

cd sources || fatal "Can't change to source directory"

ls -1 | grep -v '\.peak$' | sort > "${TEMP}/all-sources"

set_diff "${TEMP}/all-sources" "${TEMP}/used-sources" | remove_sources

cleanup

echo "Done."