88 lines
2.5 KiB
Bash
Executable File
88 lines
2.5 KiB
Bash
Executable File
#!/bin/sh -e
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#
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# 2020 Dennis Camera (dennis.camera@ssrq-sds-fds.ch)
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#
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# This file is part of cdist.
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#
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# cdist is free software: you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation, either version 3 of the License, or
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# (at your option) any later version.
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#
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# cdist is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with cdist. If not, see <http://www.gnu.org/licenses/>.
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#
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quote() { printf "'%s'" "$(printf '%s' "$*" | sed -e "s/'/'\\\\''/g")"; }
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drop_awk_comments() { quote "$(sed '/^[[:blank:]]*#.*$/d;/^$/d' "$@")"; }
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aliases_file=$(cat "${__object:?}/explorer/aliases_file")
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test -n "${aliases_file}" || {
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echo 'Could not determine aliases file path.' >&2
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exit 1
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}
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state_should=$(cat "${__object:?}/parameter/state")
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case ${state_should}
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in
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(present)
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if cmp -s "${__object:?}/explorer/aliases" "${__object:?}/parameter/alias"
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then
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# all good!
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exit 0
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fi
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test -s "${__object:?}/parameter/alias" || {
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printf 'The --alias parameter is required if --state present.\n' >&2
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printf 'Use --state absent to remove all aliases.\n' >&2
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exit 1
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}
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if test -s "${__object:?}/explorer/aliases"
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then
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echo "update aliases" >>"${__messages_out:?}"
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else
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echo "add aliases" >>"${__messages_out:?}"
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fi
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;;
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(absent)
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# nothing to do if no aliases found.
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test -s "${__object:?}/explorer/aliases" || exit 0
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echo "delete aliases" >>"${__messages_out:?}"
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;;
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(*)
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printf 'Invalid --state: %s.\n' "${state_should}" >&2
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printf 'Acceptable values are: present, absent.\n' >&2
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exit 1
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esac
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cat <<EOF
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test -f $(quote "${aliases_file}") || touch $(quote "${aliases_file}")
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awk $(drop_awk_comments "${__type:?}/files/update_aliases.awk") <$(quote "${aliases_file}") >$(quote "${aliases_file}.tmp") \
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|| {
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rm -f $(quote "${aliases_file}.tmp")
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echo 'Generating new aliases file failed!' >&2
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exit 1
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}
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if ! cmp -s $(quote "${aliases_file}") $(quote "${aliases_file}.tmp")
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then
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# aliases file was modified, replace:
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cat $(quote "${aliases_file}.tmp") >$(quote "${aliases_file}")
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# then, run newaliases if present ("missing" on Alpine Linux because of typo)
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command -v newaliases >/dev/null 2>&1 && newaliases || true
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fi
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rm -f $(quote "${aliases_file}.tmp")
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EOF
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