3 #########################################################################
4 # This program is free software: you can redistribute it and/or modify #
5 # it under the terms of the version 3 of the GNU General Public License #
6 # as published by the Free Software Foundation. #
8 # This program is distributed in the hope that it will be useful, but #
9 # WITHOUT ANY WARRANTY; without even the implied warranty of #
10 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU #
11 # General Public License for more details. #
13 # You should have received a copy of the GNU General Public License #
14 # along with this program. If not, see <http://www.gnu.org/licenses/>. #
16 # Written by and Copyright (C) Francois Fleuret #
17 # Contact <francois@fleuret.org> for comments & bug reports #
18 #########################################################################
24 ######################################################################
26 function check_remote_is_defined () {
27 if [[ "${REMOTE_HOST}" ]] && [[ "${REMOTE_DIR}" ]]
31 echo "@XREMOTE_HOST should come first." >&2
40 This script takes a script as argument and executes it remotely in a
41 temporary directory on a ssh-accessible server.
43 It parses the script first to find embedded arguments which defines
44 the hostname on which to run, the files to send, the files to get
45 back when the execution is over, and commands to execute before
46 running the executable remotely.
48 These arguments can appear multiple times, except the one that
49 specifies the remote host.
53 @XREMOTE_HOST: elk.fleuret.org
54 @XREMOTE_EXEC: python3
55 @XREMOTE_SEND: main.cf
57 @XREMOTE_PRE: ln -s /home/fleuret/data/pytorch ./data
59 If no argument is provided to @XREMOTE_HOST, the environment
60 variable $XREMOTE_HOST is used instead
62 Contact <francois@fleuret.org> for comments.
68 function cleanup_remote_tmp () {
69 if [[ "${REMOTE_HOST}" ]] && [[ "${REMOTE_DIR}" ]]
71 echo "xremote: Clean up remote workdir."
72 ssh "${REMOTE_HOST}" "rm -rf \"${REMOTE_DIR}\""
76 ######################################################################
78 [[ -x "$1" ]] || (help && exit 1)
80 main="$(basename "$1")"
84 trap cleanup_remote_tmp EXIT
86 ######################################################################
91 if [[ "${line}" =~ '@XREMOTE' ]]
94 label=$(echo "${line}" | sed -e 's/^.*@XREMOTE_\([^:]*\):.*$/\1/')
95 value=$(echo "${line}" | sed -e 's/^.*@XREMOTE_[^:]*: *\(.*\)$/\1/')
100 check_remote_is_defined
101 [[ "${REMOTE_EXEC}" ]] && (exit "Remote executable already defined!" >&2 && exit 1)
102 REMOTE_EXEC="${value}"
106 check_remote_is_defined
107 echo "xremote: ${value}"
108 ssh < /dev/null "${REMOTE_HOST}" "cd \"${REMOTE_DIR}\" && ${value}"
112 check_remote_is_defined
113 echo "xremote: -- sending files --------------------------------------------"
114 tar ch ${value} | ssh "${REMOTE_HOST}" "cd \"${REMOTE_DIR}\" && tar mxv"
118 [[ "${REMOTE_DIR}" ]] && (exit "Remote host already defined!" >&2 && exit 1)
119 REMOTE_HOST="${value}"
120 [[ "${REMOTE_HOST}" ]] || REMOTE_HOST="${XREMOTE_HOST}"
121 [[ "${REMOTE_HOST}" ]] || (echo "xremote: No remote host specified." >&2 && exit 1)
122 REMOTE_DIR="$(ssh </dev/null "${REMOTE_HOST}" mktemp -d /tmp/xremote.from_"$(hostname)_$(date +%Y%m%d-%H%M%S)".XXXXXX)"
123 echo "xremote: target is ${REMOTE_HOST}"
130 ######################################################################
132 check_remote_is_defined
134 tar c "${main}" | ssh "${REMOTE_HOST}" "cd \"${REMOTE_DIR}\" && tar mx"
136 echo "xremote: -- running the executable -----------------------------------"
138 if [[ "${REMOTE_EXEC}" ]]
140 REMOTE_COMMAND="${REMOTE_EXEC} ${main}"
142 REMOTE_COMMAND="./${main}"
145 ssh </dev/null "${REMOTE_HOST}" "cd \"${REMOTE_DIR}\" && ${REMOTE_COMMAND}"
147 ######################################################################
149 # Disable globbing to keep wildcards for the remote side
151 echo "xremote: -- retrieving files -----------------------------------------"
157 if [[ "${line}" =~ '@XREMOTE' ]]
159 label=$(echo "${line}" | sed -e 's/^.*@XREMOTE_\([^:]*\):.*$/\1/')
160 value=$(echo "${line}" | sed -e 's/^.*@XREMOTE_[^:]*: *\(.*\)$/\1/')
163 check_remote_is_defined
164 ssh </dev/null "${REMOTE_HOST}" "cd \"${REMOTE_DIR}\" && tar 2>/dev/null c ${value}" | tar mxv
172 echo "xremote: -- finished -------------------------------------------------"
174 ######################################################################