myshellconfig/sshs

#!/bin/sh
sshs() {
    ENTRY
    [ $# -eq 0 ] && { [ "${sshcon:-x}" == "x" ] || set -- "${sshcon}"; }
    if [ -n "${TMUX}" ]; then
        tmux set-environment sshcon "$@"
    fi
#    local LOGLEVEL="WARN"
#    MKTMPCMD='mktemp $(echo ${XDG_RUNTIME_DIR}/bashrc.XXXXXXXX.conf)'
#    VIMMKTMPCMD="mktemp ${XDG_RUNTIME_DIR}/vimrc.XXXXXXXX.conf"

    local f
    local TMPBASHCONFIG=$(mktemp -p ${XDG_RUNTIME_DIR} -t bashrc.XXXXXXXX --suffix=.conf)
    local FILELIST=()
#    local FILELIST=( "${MSC_BASE}/functions.sh" "${MSC_BASE}/logging" "${MSC_BASE}/myshell_load_fortmpconfig" $(getbashrcfile) ~/.bash_aliases "${MSC_BASE}/aliases" "${MSC_BASE}/PS1" "${MSC_BASE}/bash_completion.d/*" )

    echo MSC_BASE: $MSC_BASE
    SSHS_ADDFILES="${MSC_BASE}/sshs_addfiles.conf"
    echo SSHS_ADDFILES: $SSHS_ADDFILES
    if [ -e ${SSHS_ADDFILES} ] ; then
        for f in $(envsubst < "${SSHS_ADDFILES}");do
            logdebug "add $f to FILELIST"
            FILELIST+=("${f}")
        done
    else
        loginfo "Filelist for sshs not found: ${MSC_BASE}/sshs_addfiles.conf"
    fi
    local SSH_OPTS="-o VisualHostKey=no -o ControlMaster=auto -o ControlPersist=20s"
    #local SSH_OPTS="-o VisualHostKey=no -o ControlMaster=auto -o ControlPersist=20s -o ControlPath=~/.ssh/master-%C"
    #local SSH_OPTS="-o VisualHostKey=no -o ControlMaster=yes -o ControlPersist=10s -o ControlPath=~/.ssh/ssh-%C"
    # Read /etc/bashrc or /etc/bash.bashrc (depending on distribution) and /etc/profile.d/*.sh first
    #ssh -T ${SSH_OPTS} $@ "pwd" >/dev/null 2>/dev/null || { logerr "Server $@ not reachable -> exit"; return 1; }
    cat << EOF >> "${TMPBASHCONFIG}"
[ -e /etc/bashrc ] && BASHRC=/etc/bashrc
[ -e /etc/bash.bashrc ] && BASHRC=/etc/bash.bashrc
. \$BASHRC

export USERNAME="${USERNAME}"
export FULLNAME="${FULLNAME}"
export USEREMAIL="${USEREMAIL}"
export SCRIPT_LOG="\$(cat /proc/\$$/cmdline | xargs -0 echo|awk '{print \$3}' |sed 's/.conf$/.log/')"
export LOGLEVEL_DEFAULT="${LOGLEVEL_DEFAULT}"
export FILELOGLEVEL_DEFAULT="${FILELOGLEVEL_DEFAULT}"

trap "rm -f \${bashrctmp} \${vimrctmp} \${SCRIPT_LOG}" EXIT
alias vi='vim -u \${vimrctmp}'
alias vim='vim -u \${vimrctmp}'
alias vimdiff='vimdiff -u \${vimrctmp}'
export LS_OPTIONS="${LS_OPTIONS}"
export VIMRC="\${vimrctmp}"
export BASHRC="\${bashrctmp}"

for i in /etc/profile.d/*.sh; do
    if [ -r "$i" ];then
        if [ "$PS1" ]; then
            . "$i"
        else
            . "$i" >/dev/null
        fi
    fi
done
unset i
EOF

    for f in ${FILELIST[@]}; do
        if [ -e $f ]; then
            logdebug "add to tmpconfig: $f"
            cat "$f" >> "${TMPBASHCONFIG}";
        fi
    done
    
    if [ $# -ge 1 ]; then
        if [ -e "${TMPBASHCONFIG}" ] ; then
           logdebug "create remote bashrc"
           logdebug "SSH_OPTS: $SSH_OPTS"
           
           local sshcmd=$(cat << _remote_commands
#!/bin/bash

bashrctmp=\$(mktemp -p \${XDG_RUNTIME_DIR-~} -t bashrc.XXXXXXXX --suffix=.conf | tr -d '[:space:]')
vimrctmp=\$(mktemp -p \${XDG_RUNTIME_DIR-~} -t vimrc.XXXXXXXX --suffix=.conf | tr -d '[:space:]')
echo "\$bashrctmp \$vimrctmp"

echo "bashrctmp=\${bashrctmp}" > \${bashrctmp}
echo "vimrctmp=\${vimrctmp}" >> \${bashrctmp}

cat <<- 'eof' >> \$bashrctmp

$(cat ${TMPBASHCONFIG}) 
export SCRIPT_LOG="\$(cat /proc/\$$/cmdline | xargs -0 echo|awk '{print \$3}' |sed 's/.conf$/.log/')"
tmux set-environment bashrctmp ${bashrctmp} &>\${SCRIPT_LOG}
title "\$USER@\$HOSTNAME: \$PWD"
loginfo "This bash runs with temporary config from \$BASHRC"
eof

cat <<- 'eof3' > \${vimrctmp}
$(cat ${MSC_BASE}/vimrc) 
eof3
_remote_commands
)

           local REMOTETMPCONFIGS=($(ssh -T ${SSH_OPTS} $@ "$sshcmd") )
           logdebug "remote tmp bashrc ${REMOTETMPCONFIGS[0]}"
           logdebug "remote tmp vimrc ${REMOTETMPCONFIGS[1]}"
           ssh -t ${SSH_OPTS} $@ "SSHS=true exec bash --rcfile ${REMOTETMPCONFIGS[0]} -i "
           rm "${TMPBASHCONFIG}"
        else
           logwarn "${TMPBASHCONFIG} does not exist. Using »ssh -t $@«"
           ssh -t "$@" 
        fi
    else
        logwarn "too few arguments for sshs" >&2
        ssh
    fi
    
    EXIT
}