cdist configuration management
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131 lines
3.2 KiB
131 lines
3.2 KiB
#!/bin/sh -e |
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# |
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# 2019 Dennis Camera (dennis.camera at 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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# |
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# Check if the given editor is present on the target system and determine its |
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# absolute path. |
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# |
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die() { |
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echo "$@" >&2 |
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exit 1 |
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} |
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editor_missing() { die "Editor '$1' is missing on the target system."; } |
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editor_no_alternative() { |
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die "Editor '$1' is not in the alternatives list of the target system." \ |
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"$(test -n "${editors}" && printf '\nPlease choose one of:\n\n%s\n' "${editors}")" |
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} |
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# No need to check for the path if the file is supposed to be removed. |
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test "$(cat "${__object}/parameter/state")" != 'absent' || exit 0 |
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case $("${__explorer}/os") |
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in |
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debian|devuan|ubuntu) |
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has_alternatives=true |
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# NOTE: Old versions do not support `--list`, in this case ignore the errors. |
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# This will require an absolute path to be provided, though. |
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editors=$(update-alternatives --list editor 2>/dev/null) |
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;; |
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*) |
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# NOTE: RedHat has an alternatives system but it doesn't usually track |
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# editors and it is a pain to extract the list. |
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has_alternatives=false |
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;; |
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esac |
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# Read --editor parameter and check its value since it is "optional" |
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editor=$(cat "${__object}/parameter/editor" 2>/dev/null) || true |
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test -n "${editor}" || die 'Please provide an --editor to configure.' |
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case $editor |
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in |
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/*) |
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is_abspath=true |
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;; |
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*/*) |
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die 'Relative editor paths are not supported' |
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;; |
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*) |
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is_abspath=false |
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;; |
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esac |
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if $has_alternatives && test -n "${editors}" |
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then |
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IFS=' |
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' |
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if ! $is_abspath |
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then |
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# First, try to resolve the absolute path using $editors. |
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while true |
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do |
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for e in $editors |
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do |
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if test "$(basename "${e}")" = "${editor}" |
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then |
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editor="${e}" |
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break 2 # break out of both loops |
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fi |
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done |
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# Iterating through alternatives did not yield a result |
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editor_no_alternative "${editor}" |
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break |
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done |
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fi |
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# Check if editor is present |
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test -f "${editor}" || editor_missing "${editor}" |
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for e in $editors |
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do |
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if test "${editor}" = "${e}" |
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then |
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# Editor is part of the alternatives list -> use it! |
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echo "${editor}" |
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exit 0 |
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fi |
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done |
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editor_no_alternative "${editor}" |
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else |
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# NOTE: This branch is mostly for RedHat-based systems which do |
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# not track editor alternatives. To make this type useful |
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# on RedHat at all we allow an absoloute path to be provided |
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# in any case. |
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if $is_abspath |
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then |
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test -x "${editor}" || editor_missing "${editor}" |
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echo "${editor}" |
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exit 0 |
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else |
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die "The target doesn't list any editor alternatives. " \ |
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"Please specify an absolute path or populate the alternatives list." |
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fi |
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fi |
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# The script should never reach this statement! |
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exit 1
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