Directory "teleportation" script: Allow to test your working copy in a remote server, perhaps behind a firewall, with just an ssh connection.

teleport

#!/usr/bin/env bash
# :vim setf bash

# Constants:
tunPort=9876;
screenSessId="teleport_$$"

# Define handy default values:
allHostNames=$(hostname -A);
srcFQDN=${allHostNames%% *}
srcUser=$(whoami)
srcPath=$(pwd); # Current path by default.
destination="${1}"; # Accept remote url (even user@host...)
pivotUser="${2}"; # Accept pivot-user to sudo.
forwardings="-L 2000:localhost:2000";

# Check required local tools availability:{{{
if [ -z "$(which ssh)" ]; then
    >&2 echo "ERROR: ssh not installed";
    exit 1;
fi
if [ -z "$(which expect)" ]; then
    >&2 echo "ERROR: expect not installed";
    exit 1;
fi
if [ -z "$(which screen)" ]; then
    >&2 echo "ERROR: screen not installed";
    exit 1;
fi
# }}}


# Banner
# ======
echo '                   .';
echo '                  .:.';
echo '                 .:::.';
echo '                .:::::.';
echo '            ***.:::::::.***';
echo '       *******.:::::::::.*******       Ｔｅｌｅｐｏｒｔ';
echo '     ********.:::::::::::.********     －－－－－－－－';
echo '    ********.:::::::::::::.********    ';
echo '    *******.::::::`***`::::.*******    GNU';
echo '    ******.::::`*********`::.******    Directory';
echo '     ****.:::`*************`:.****     Teleportation';
echo '       *.::`*****************`.*       System';
echo '       .:`  ***************    .       ';
echo '      .'
# '
echo '－－－－－－－－－－－－－－－－－－－－－－－－－－－－－'
echo


# Confirm origin:
# ===============
origin="${srcUser}@${srcFQDN}:${srcPath}";
read -r -p "  👉 Origin: " -ei "${origin}" origin
echo "";
srcUser=${origin%%@*}
rest=${origin#*@}
srcFQDN=${rest%%:*}
srcPath=${rest#*:}
tunOrigin="${srcUser}@localhost:${srcPath}";

# echo $srcUser;
# echo $srcFQDN;
# echo $srcPath;
# exit 0;

# Ask for local passowrd:
# =======================
read -s -r -p "  👉 Please, provide your local password: " srcUserPw; echo "";
echo "";


# Confirm destination:
# ====================
dstUser=${destination%%@*}
if [[ $destination != *@* ]]; then dstUser="${srcUser}"; fi
rest=${destination#*@}
dstFQDN=${rest%%:*}
dstPath=${rest#*:}
if [[ $rest != *:* ]]; then dstPath=$(basename "${srcPath}"); fi
destination="${dstUser}@${dstFQDN}:${dstPath}";
read -r -p "  👉 Destination: " -ei "${destination}" destination
echo "";
dstUser=${destination%%@*}
rest=${destination#*@}
dstFQDN=${rest%%:*}
dstPath=${rest#*:}
dstHost="${dstUser}@${dstFQDN}";

if [[ ${dstPath} != /* ]]; then dstPath="~/${dstPath}"; fi;

# echo $dstUser;
# echo $dstFQDN;
# echo $dstPath;
# exit 0;


# Ask for remote passowrd:
# =======================
read -s -r -p "  👉 Now provide your remote password: " remotePw; echo "";
echo "";


# Ask for pivot user:
# ===================
read -r -p "  👉 Pivot user (leave blank if no sudo required): " -ei "${pivotUser}" pivotUser
echo "";


# Ask for extra ssh forwardings:
# ==============================
read -r -p "  👉 Additional (ssh) port forwardings: " -ei "${forwardings}" forwardings
echo "";



if [ -n "${pivotUser}" ]; then
sudoCmd=$(cat << EOF
send "sudo su - ${pivotUser}\\r"
expect "password"
send "${remotePw}\\r"
expect "$ "
EOF
);
else
    sudoCmd="";
fi;




# Create screen session:
# ======================
screen -dmS ${screenSessId}

echo "------------------------------";
echo "------------------------------";
echo "";
echo "";


echo "Connecting to remote server..."
expect << !EOF
# @@sh@@

## Capture screen session:
spawn screen -r ${screenSessId}

## Connect to remote server:{{{
send " ssh -t -R ${tunPort}:localhost:22 ${forwardings} \"${dstHost}\" \"bash -s\"\r"
expect "password:"
send "${remotePw}\r"
expect "$ "
## }}}

## Check required remote tools availability:{{{
send " which sshfs || (echo -n mi;echo ssing)\r";
expect {
    "missing" {
        puts "ERROR: sshfs not installed in remote host."
        exit 1
    }
    "$ " {}
}
## }}}

## Sudo to pivot-user (if provided):{{{
${sudoCmd}
## }}}

## Create remote mount point:{{{
send " mkdir -p ${dstPath}\r";
expect "$ "
## }}}

## Mount local srcPath to remote:
send " sshfs -o StrictHostKeyChecking=no -p ${tunPort} ${tunOrigin} ${dstPath}\r"

expect "password:"

send "${srcUserPw}\r"

expect "$ "

send " # ==========================\r"
send " # Teleportation is ongoing!!\r"
send " # ==========================\r"
send "\r"
send " # Close this terminal to return home...\r"
send "\r"

## Open bash session and umount on exit
send "cd ${dstPath};bash;cd ..;fusermount3 -u ${dstPath} && rmdir ${dstPath} && exit\r"

expect "$ "


# @@/sh@@

!EOF

screen -r ${screenSessId}