Rsync and SSH to remote host

TTY to pass signals

#!/bin/sh
# 
# Utility script to rsync and then open a shell or execute commands on a remote host.
# Tailored a little bit for Lucene/Solr
# @author David Smiley
# 
set -uex
REMOTEHOST=buildbox.local
REMOTEPATH="builds$PWD"

if [ ! -e ".git" ]; then #file or dir
  echo "Expecting the current directory to be a git project."
  exit 1
fi

#https://stackoverflow.com/questions/13713101/rsync-exclude-according-to-gitignore-hgignore-svnignore-like-filter-c
git -C . ls-files --exclude-standard -oi --directory > /tmp/git-excludeme$$.txt

# note: This will fail if the target directory doesn't exist on the remote.  This is deliberate to avoid accidents.
#  Transfer everything in the current directory to the remote.
#    Use times to detect new stuff.  It'll sync times.
#    Human-readable.  Itemize.
#  Exclude /.git and everything the .gitignore files say to ignore.
#  Delete remote files except those excluded by our exclude patterns.
rsync -rthi --delete --exclude='/.git' --exclude-from=/tmp/git-excludeme$$.txt \
  . "$REMOTEHOST:$REMOTEPATH"
  #FORMER FILTER: --filter="dir-merge,- .gitignore"
  #  However rsync has some slight differences, and some ignored files are in git anyway.

# SSH to the machine at the target directory
if [ -z "${1-}" ]; then  #is $1 defined?
  # switch to interactive shell (force TTY)
  ssh -t $REMOTEHOST "cd $REMOTEPATH && exec \$SHELL -l"
else
  # execute args and then quit
  ssh -t $REMOTEHOST "cd $REMOTEPATH && $@"
fi