#!/bin/bash

set -e

days=3
dry_run=false
workspace_top=$HOME/workspace
maxdepth=1

while [ $# -gt 0 ]; do
    case $1 in
	--days) days="$2"; shift ;;
	--dry_run) dry_run="$2"; shift ;;
	--workspace_top) workspace_top="$2"; shift ;;
	--maxdepth) maxdepth="$2"; shift ;;
	*) echo "ERROR: Wrong option: $1"; exit 1 ;;
    esac
    shift
done

set -x

if [ "$days" -lt "0" ]; then
    echo "ERROR: Refusing to delete workspaces that are $days days old"
    exit 1
fi

echo "Date / size report before (`date`):"
ls -ld $workspace_top/* || true
df -h $workspace_top || true
du -hsc $workspace_top/* || true

# Semantics of find's mtime "+N" stands for N+1 days old or older.
days_1=$(($days-1))

# Handle dirs with whitespaces by setting $IFS to newline.
SAVEIFS=$IFS
IFS=$'\n'
dirs=($(find $workspace_top/ -maxdepth $maxdepth -type d -mtime +$days_1))
IFS=$SAVEIFS

rm_dirs=()
for dir in "${dirs[@]}"; do
    if [ x"$(find "$dir" -mtime -$days | wc -l)" = x"0" ]; then
        rm_dirs=("${rm_dirs[@]}" "$dir")
    fi
done

if [ ${#rm_dirs[@]} != 0 ]; then
    echo "Removing directories:"
    ls -ld "${rm_dirs[@]}"
    du -hs "${rm_dirs[@]}"
    if ! $dry_run; then
	# Make sure we can get into all subdirectories.
	# Glibc tests can leave behind "rw-" directories, the contents of which
	# can't be cleaned up without "x" permission bit.
	chmod -R +rwx "${rm_dirs[@]}"
        rm -rf "${rm_dirs[@]}"
    else
        echo "DRY_RUN: NOT REMOVING DIRECTORIES"
    fi

    echo "Date / size report after (`date`):"
    ls -ld $workspace_top/* || true
    df -h $workspace_top || true
    du -hsc $workspace_top/* || true
fi