non/remove-unused-sources

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#!/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."