Allow execution of web script

Fixes: #2

.gitignore

@@ -22,7 +22,6 @@ dist
 build
 eggs
 parts
-bin
 var
 sdist
 develop-eggs

README.md

@@ -24,6 +24,10 @@ exit
 
 # run df on two remote hosts, syncronized windows
 HOSTS="node1 node2" rmux df
+
+# run a script downloaded from the web (installs pip)
+rmux -w https://bootstrap.pypa.io/get-pip.py
+
 ```
 
 If you fail to define the ``HOSTS`` variable the tool will default to localhost

bin/rmux

@@ -0,0 +1,120 @@
+#!/usr/bin/env bash
+# Shortcut for creating templated new shell scripts
+set -euo pipefail
+: ${HOSTS:=localhost}
+: ${XPANES_OPT:=-ss}
+red=`tput setaf 1`
+green=`tput setaf 2`
+blue=`tput setaf 4`
+bold=`tput bold; tput setaf 7`
+reset=`tput sgr0`
+
+# -- functions ---
+
+get_abs_path() {
+     local PARENT_DIR=$(dirname "$1")
+     cd "$PARENT_DIR"
+     local ABS_PATH="$(pwd)"/"$(basename "$1")"
+     cd - >/dev/null
+     echo "$ABS_PATH"
+}
+
+# --- cli processing ---
+POSITIONAL=()
+while [[ $# -gt 0 ]]
+do
+key="$1"
+
+case $key in
+    -w)
+    WEB_SCRIPT="$2"
+    shift # past argument
+    shift # past value
+    break # anything after url will be passed to remote command
+    ;;
+    -h|--help)
+    shift # past argument
+    cat <<EOF
+Usage:
+    rmux [command] [options]
+    rmux -w <url> [options]
+
+General Options:
+    -h, --help      Show help.
+    --version       Displays current version and where it runs from
+    -w <url>        Download script from url and execute it
+
+The list of hosts is loaded from ${bold}HOSTS${reset} environment variable \
+and when this is not defined it will fallback to using localhost, still even \
+in this case it will use ssh.
+EOF
+    exit 0
+    ;;
+    --version)
+    shift
+    echo "rmux ${green}$(python -c 'import rmux; print(rmux.__version__)')${reset} from ${blue}$(get_abs_path `which $0`)${reset}"
+    exit 0
+    ;;
+    *)    # unknown option
+    POSITIONAL+=("$*") # save it in an array for later
+    # shift
+    break
+    ;;
+esac
+done
+# set -- "${POSITIONAL[@]:-}" # restore positional parameters
+
+if [ "${HOSTS}" == "localhost" ]; then
+    &>2 echo "Warning: using localhost fallback, define HOSTS as a space separated list"
+fi
+
+which xpanes >/dev/null || {
+    >&2 echo "FATAL: xpanes not found, please install it. https://github.com/greymd/tmux-xpanes#installation"
+    exit 2
+}
+
+# detect current project based on .git presence
+PROJECT_ROOT=$(git rev-parse --show-toplevel 2>/dev/null || true)
+PROJECT_NAME=$(basename "$PROJECT_ROOT")
+REMOTE_DIR=.cache/.rmux/$PROJECT_NAME
+if [[ "$PROJECT_ROOT" != "" ]]; then
+    echo INFO: Found ${green}$PROJECT_NAME${reset} project on ${green}$PROJECT_ROOT${reset}
+    # generate smart exclude list, based on .gitignore when possible.
+    # See https://stackoverflow.com/a/15373763/99834
+    (
+        cd $PROJECT_ROOT
+        git ls-files --exclude-standard -oi --directory >$PROJECT_ROOT/.git/ignores.tmp
+
+                # if os.path.isfile('.gitignore'):
+            # self.rsync_params += \
+            #     '--include .git --exclude-from=.git/ignores.tmp '
+    )
+    for HOST in $HOSTS; do
+        set -x
+        ssh $HOST mkdir -p $REMOTE_DIR
+        rsync -ah --no-o --no-g --include .git --exclude-from=$PROJECT_ROOT/.git/ignores.tmp $PROJECT_ROOT/ $HOST:$REMOTE_DIR/
+    done
+fi
+
+
+# >&2 echo "DEBUG: arguments $# : $*"
+XPANES_OPT='-ss'
+
+if [[ "${WEB_SCRIPT:-}" != "" ]]; then
+  SCRIPT_FILENAME="${WEB_SCRIPT##*/}"
+  INJECT="curl -s $WEB_SCRIPT > $SCRIPT_FILENAME && chmod +x $SCRIPT_FILENAME && ./$SCRIPT_FILENAME"
+fi
+
+
+if [ "$#" -eq 0 ]; then
+    >&2 echo "INFO: No command specified, just starting ssh sessions"
+    # COMMAND="cd $REMOTE_DIR; shopt -s execfail; exec -l \"\${SHELL:-sh}\" ls"
+    COMMAND="\${SHELL:-sh} -i <<< 'cd $REMOTE_DIR;${INJECT:-}; exec </dev/tty'"
+else
+    # COMMAND="cd $REMOTE_DIR; $*; shopt -s execfail; exec -l \"\${SHELL:-sh}\" ls"
+    XPANES_OPT='-ss'
+    COMMAND="\${SHELL:-sh} -i <<< 'cd $REMOTE_DIR;${INJECT:-} $*; exec </dev/tty'"
+
+fi
+
+xpanes $XPANES_OPT -t -c "ssh -t -o StrictHostKeyChecking=no -o ForwardX11=no {} \"$COMMAND\"" $HOSTS