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# pro-archman
# lib/dir.sh
# Miscellaneous directory-related functions
#
# Copyright (C) 2013 Patrick "P. J." McDermott
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
[ "x${_DIR_SM+set}" = 'xset' ] && return 0
_DIR_SM=1
hash_name()
{
local name="${1}"
local hash=
if [ "x${name}" != "x${name#lib?}" ]; then
hash="$(printf '%s\n' "${name}" | sed 's/^\(lib.\).*$/\1/')"
elif [ "x${name}" != "x${name#src-?}" ]; then
hash="$(printf '%s\n' "${name}" | sed 's/^\(src-.\).*$/\1/')"
else
hash="$(printf '%s\n' "${name}" | sed 's/^\(.\).*$/\1/')"
fi
printf '%s\n' "${hash}"
return 0
}
dir_is_empty()
{
local dir="${1}"
local ret=
local dirent=
ret=0
# Patterns to match all dirents except "." and "..":
# * dirents whose names don't start with "."
# .[!.] dirents whose names start with ".", are two characters long,
# and aren't ".."
# .??* dirents whose names start with "." and are three or more
# characters long
for dirent in "${dir}/"* "${dir}/".[!.] "${dir}/".[!.] "${dir}/".??*; do
if [ -e "${dirent}" ]; then
ret=1
break
fi
done
return ${ret}
}
try_rmdir()
{
local dir="${1}"
if dir_is_empty "${dir}"; then
rmdir "${dir}"
return ${?}
else
return 1
fi
}
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