sinkto

#! /bin/bash

#
# Akkana's script to sync mail, docs, dotfiles and a few other important
# directories # when transitioning between home machine and a laptop.
# Called as sinkto host or sinkfrom host
# (make a symlink from sinkto to sinkfrom).
#
# And in case you're wondering, yes, I do know how to spell sync.
# But if I called it syncfrom/syncto then I couldn't use tab-completion
# to distinguish it from the sync program.
#
# This is GPLv2 free to reuse or modify blah blah
#

# Try to get ssh-agent started, so we don't get prompted for password
# sixteen bazillion times:
# But of course this doesn't work, because when has ssh-agent ever worked?
# That's okay, no longer need it if we're using rsync -R (relative).
#eval `ssh-agent`
#ssh-add ~/.ssh/id_rsa

# The directories we need to keep synchronized.
# This list will be different for everybody.
dir_list='Documents/ .config/musicplayer/ Mail/ web/ .fetchmail .emacs-lisp .vim .mutt .themes bin Procmail'
# Can't include .config/openbox because menu.rc must vary
# depending on what distro we're on and what programs it has available.

# Individual files to keep in sync:
file_list=".zshrc .zlogin .zprofile .zshrc-$(hostname -s) .zshrc-$1 .cshrc .bashrc .emacs .emacs.bmk .muttrc .fetchmailrc .procmailrc .xinitrc .mailcap .mime.types .gtkrc-2.0 .gtkrc.mine .gitconfig .XCompose"

# Would like .Xdefaults but that has to be different on different screens.

# Files to exclude, e.g. huge log files:
exclude_list="log LOG .git *.mp4 .img bin/crikey neoncache feeds web/feedme"

##### End customization.

#
# First figure out if we're going from or to ... src and dst.
#

if [ x$USER == x ]; then
  me=$(whoami)
else
  me=$USER
fi

srclist=""
dstpath=""

##########################################################
# Some utility functions
#

#
# echo_and_do something.
#
echo_and_do() {
  echo $*
  $*
}

#
# make_host_dir host dir
# build up an rsync host:dir term
#
make_host_dir() {
  if [ x$1 == xmoon -o x$1 == xshallowsky.com -o x$1 == xtimocharis.com ]; then
    echo "$1:/back/$me/$2"
  elif [ x$1 == x ]; then
    echo $2
  elif [ -d $1 ]; then
    echo $1/$2
  else
    echo "$1:$2"
  fi
}

#
# end utility functions, back to main
##########################################################

progname=$(basename $0)

# optional -n argument which must come first
if [ $1 == '-n' ]; then
    extras='-n'
    shift
fi

if [ $progname == 'sinkfrom' ]; then
  for sp in $file_list $dir_list; do
    srclist="$srclist $(make_host_dir $1 $sp)"
  done

  dstpath='~/'

elif [ $progname == 'sinkto' ]; then
  # To use relative paths, we'd better be in ~ to begin with!
  echo_and_do cd $HOME
  srclist="$file_list $dir_list"
  dstpath=$(make_host_dir $1 './')

else
  echo "Unknown program name:" $progname
  echo $*
fi

# echo -n "Okay to sink from $src to $dst ? "
# read ans
# if [ x$ans != 'xy' -a x$ans != 'xY' -a x$ans != "xyes" ]; then
#   echo "Exiting by your request"
#   exit 1
# fi

# Handle sync-to mail spool:
# Actually, this isn't quite so critical now that mutt no longer
# insists on using atime for everything.
# if [ $progname == 'sinkto' ]; then
#   # Make sure fetchmail is stopped before updating mailboxes:
#   echo_and_do killall fetchmail

#   # We'll want to copy the mail spool along with other mail
#   echo_and_do cp /var/mail/$me $HOME/Msgs/spool
# fi

# Build up the exclude list:
excludes=""
for f in $exclude_list; do
    excludes="$excludes --exclude=$f"
done

#
# Now copy the various directories and files, using rsync -R (relative).
#
echo_and_do rsync -avRu --delete $extras $excludes $srclist $dstpath