114 lines
2.5 KiB
Bash
114 lines
2.5 KiB
Bash
#!/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() { die "Editor '$1' is not in the alternatives list of the target system."; }
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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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editors=$(update-alternatives --list editor)
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;;
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*)
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# NOTE: RedHat has an alternatives system but it doesn't usually track
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# editors and it is a pain to extract the list.
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has_alternatives=false
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;;
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esac
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editor=$(cat "${__object}/parameter/editor")
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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 $has_alternatives && test "$(echo "${editors}" | wc -l)" -gt 0
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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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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="${e}"
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break
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fi
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done
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fi
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# Check if path is present
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test -f "${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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