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|
#!/usr/bin/env sh
# POSIX shell implementation of Gitrect.
# Clean up folders not present in the git-list
# For all directories found in $WORKDIR
# Operate on tempfile
TEMPFILE="/tmp/gitrect.temp.$(xxd -l6 -p /dev/urandom)"
touch $TEMPFILE
PREFIX="/tmp/gitrect.prefix.$(xxd -l6 -p /dev/urandom)"
touch $PREFIX
# Reset all variables that might be set
DEFAULT_STATE="$HOME/.local/share/gitlist"
WORKDIR="$HOME/.code"
verbose=0 # Variables to be evaluated as shell arithmetic
# should be initialized to a default or validated beforehand.
usage="$(basename "$0") [-h] [-v -w WORKDIR -f FILE]
Scan directories in the state file and delete those not referenced:
-w set the working directory (default: ${WORKDIR})
-f set the git list file (default: ${DEFAULT_STATE})
-h show this help text
-v increase output verbosity
"
while :; do
case $1 in
-h | -\? | --help) # Call a "show_help" function to display a synopsis, then exit.
echo "$usage"
exit
;;
-f) # Takes an option argument, ensuring it has been specified.
if [ -n "$2" ]; then
DEFAULT_STATE=$2
shift
fi
;;
-f=?*)
DEFAULT_STATE=${1#*=} # Delete everything up to "=" and assign the remainder.
;;
-f=) # Handle the case of an empty --file=
printf 'ERROR: "-f" requires a non-empty option argument.\n' >&2
exit 1
;;
-w) # Takes an option argument, ensuring it has been specified.
if [ -n "$2" ]; then
WORKDIR=$2
shift
fi
;;
-w=?*)
WORKDIR=${1#*=} # Delete everything up to "=" and assign the remainder.
;;
-w=) # Handle the case of an empty --file=
printf 'ERROR: "-w" requires a non-empty option argument.\n' >&2
exit 1
;;
-v)
verbose=$((verbose + 1)) # Each -v argument adds 1 to verbosity.
;;
--) # End of all options.
shift
break
;;
-?*)
printf 'WARN: Unknown option (ignored): %s\n' "$1" >&2
;;
*) # Default case: If no more options then break out of the loop.
break ;;
esac
shift
done
# If there are input files (for example) that follow the options, they
# will remain in the "$@" positional parameters.
# No posix-compliant way of getting processor count, so leverage OS-specifics
FS_SEPARATOR="/"
if [ "$(uname -s)" = "Darwin" ]; then
NPROC=$(eval "sysctl -n hw.ncpu")
elif [ "$(uname -s)" = "Linux" ]; then
NPROC=$(eval "nproc")
else
# Windows uses backslash
FS_SEPARATOR="\\"
if [ $verbose -gt 0 ]; then
echo "cannot detect CPU total"
fi
fi
# This double loop is super inefficient, but, it works (?)
while read -r line; do
dir=$(echo $line | cut -d, -f1|rev|cut -d/ -f2-|rev) #top directories
echo ${dir}\$ >> $PREFIX
done <$DEFAULT_STATE
uniq $PREFIX $TEMPFILE
rm $PREFIX
while read -r line; do
dir=$(echo $line | cut -d, -f 1)
echo $dir >> $TEMPFILE
done <$DEFAULT_STATE
if [ $verbose -gt 0 ]; then
find ${WORKDIR}/* -depth \
| sed -e "s,${WORKDIR}/,," \
| grep -E -v -f ${TEMPFILE} \
| xargs -P $NPROC -t -r -I {} rm -rf ${WORKDIR}${FS_SEPARATOR}{}
else
find ${WORKDIR}/* -depth \
| sed -e "s,${WORKDIR}/,," \
| grep -E -v -f ${TEMPFILE} \
| xargs -P $NPROC -r -I {} rm -rf ${WORKDIR}${FS_SEPARATOR}{}
fi
rm $TEMPFILE
|
