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#!/bin/sh
set -eu

usage() {
	cat <<-'EOF'
		Usage: gc [ guix | trash | tmpdir | logs | coredump ]
	EOF
}



disk() {
	df -h / /mnt/backup/ |
		tail -n +2 |
		awk '{ printf "%s\t%s/%s\t%s\n", $4, $3, $2, $6 }' ||:
}

gc_guix() {
	guix system delete-generations 1m ||:
	guix gc -d 1m
}

gc_trash() {
	yes | trash-empty
}

gc_tmpdir() {
	find "${TMPDIR:-/tmp}" -atime +10 -exec rm -vf "{}" ';' ||:
}

gc_logs() {
	find /var/log/ci/ -atime +10 -exec rm -vf "{}" ';' ||:
}

gc_coredump() {
	find /var/crash/ -type f -atime +10 -exec rm -vf "{}" ';' ||:
}


gc_all() {
	gc_guix
	gc_trash
	gc_tmpdir
	gc_logs
	gc_coredump
}


TYPE="${1:-all}"
CMD=gc_"$TYPE"
if ! command -v "$CMD" >/dev/null; then
	printf 'Invalid TYPE: "%s".\n\n' "$TYPE" >&2
	usage >&2
	exit 2
fi

BEFORE="$(disk)"
set -x
"$CMD"
set +x
AFTER="$(disk)"

cat <<-EOF
	Disk space:
	  before: $BEFORE
	  after:  $AFTER
EOF