forked from ungleich-public/cdist
139 lines
3.7 KiB
Bash
Executable file
139 lines
3.7 KiB
Bash
Executable file
#!/bin/sh -e
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#
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# 2012 Steven Armstrong (steven-cdist at armstrong.cc)
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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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# __remote_{exec,copy} script to run cdist against a schroot target uri
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#
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# Usage:
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# __remote_exec="/path/to/this/script exec" cdist config target_uri
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# __remote_copy="/path/to/this/script copy" cdist config target_uri
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#
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# # target_uri examples:
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# schroot:///chroot-name
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# schroot://foo.ethz.ch/chroot-name
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# schroot://user-name@foo.ethz.ch/chroot-name
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#
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# # and how to match them in .../manifest/init
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# case "$target_host" in
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# schroot://*)
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# # any schroot
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# ;;
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# schroot://foo.ethz.ch/*)
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# # any schroot on specific host
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# ;;
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# schroot://foo.ethz.ch/chroot-name)
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# # specific schroot on specific host
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# ;;
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# schroot:///chroot-name)
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# # specific schroot on localhost
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# ;;
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# esac
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my_name="${0##*/}"
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mode="$1"; shift
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log() {
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# uncomment me for debugging
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#echo "$@" | logger -t "cdist-$my_name-$mode"
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:
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}
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die() {
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echo "$@" >&2
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exit 1
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}
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uri="$__target_host"
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scheme="${uri%%:*}"; rest="${uri#$scheme:}"; rest="${rest#//}"
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authority="${rest%%/*}"; rest="${rest#$authority}"
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path="${rest%\?*}"; rest="${rest#$path}"
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schroot_name="${path#/}"
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[ "$scheme" = "schroot" ] || die "Failed to parse scheme from __target_host ($__target_host). Expected 'schroot', got '$scheme'"
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[ -n "$schroot_name" ] || die "Failed to parse schroot name from __target_host: $__target_host"
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case "$authority" in
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'')
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# authority is empty, neither user nor host given
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user=""
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host=""
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;;
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*@*)
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# authority contains @, take user from authority
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user="${authority%@*}"
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host="${authority#*@}"
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;;
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*)
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# no user in authority, default to root
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user="root"
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host="$authority"
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;;
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esac
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log "mode: $mode"
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log "@: $@"
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log "uri: $uri"
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log "scheme: $scheme"
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log "authority: $authority"
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log "user: $user"
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log "host: $host"
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log "path: $path"
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log "schroot_name: $schroot_name"
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exec_prefix=""
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copy_prefix=""
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if [ -n "$host" ]; then
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# we are working on a remote host
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exec_prefix="ssh -o User=$user -q $host"
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copy_prefix="scp -o User=$user -q"
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copy_destination_prefix="$host:"
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else
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# working on local machine
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copy_prefix="cp"
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copy_destination_prefix=""
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fi
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log "exec_prefix: $exec_prefix"
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log "copy_prefix: $copy_prefix"
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log "copy_destination_prefix: $copy_destination_prefix"
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case "$mode" in
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exec)
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# In exec mode the first argument is the __target_host which we already got from env. Get rid of it.
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shift
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code="$exec_prefix schroot -c $schroot_name -- sh -c '$@'"
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;;
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copy)
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# get directory for given chroot_name
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schroot_directory="$($exec_prefix schroot -c $schroot_name --config | awk -F = '/directory=/ {print $2}')"
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[ -n "$schroot_directory" ] || die "Failed to retreive schroot directory for schroot: $schroot_name"
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log "schroot_directory: $schroot_directory"
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# prefix destination with chroot
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code="$copy_prefix $(echo "$@" | sed "s|$uri:|${copy_destination_prefix}${schroot_directory}|g")"
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;;
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*) die "Unknown mode: $mode";;
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esac
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log "code: $code"
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# Run the code
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$code
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log "-----"
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