Single file to use zmodem in iTerm2

iterm2-zmodem.sh

#!/bin/bash
# vim: ft=sh nu et sw=2 fdc=2

select_one() {
  local cmd; read -d '' cmd <<EOF
tell application "iTerm2" to activate
tell application "iTerm2" to set thefile to choose $1
do shell script "echo " & (quoted form of POSIX path of thefile as Unicode text)
EOF
  osascript -e "$cmd" 2>/dev/null
}

check_cancel() {
  if [[ "$1" == "" ]]; then
    echo -e \\x18\\x18\\x18\\x18\\x18
    sleep 1; echo; echo \# Cancelled transfer
    exit 0
  fi
}

do_sz() {
  local FILE=$(select_one file)
  check_cancel "$FILE"
  local tmpfile=$(mktemp); rm "$tmpfile"; mkdir "$tmpfile"
  exec 3>"$tmpfile/iterm2-zmodem.log"
  if /usr/local/bin/sz -eb "$FILE" 2>&3; then
    sleep 1; echo; echo \# Received $FILE
    rm -r "$tmpfile"
  else
    sleep 1; echo; echo \# Received $FILE failed
    open "$tmpfile"
  fi
}

do_rz() {
  local DIR=$(select_one folder)
  check_cancel "$DIR"
  local tmpfile=$(mktemp); rm "$tmpfile"; mkdir "$tmpfile"
  exec 3>"$tmpfile/iterm2-zmodem.log"
  cd "$DIR"
  if /usr/local/bin/rz -eb -B4096 2>&3; then
    sleep 1; echo; echo \# Received =\> $DIR
    rm -r "$tmpfile"
  else
    sleep 1; echo; echo \# Received failed
    open "$tmpfile"
  fi
}

case $1 in
  sz) do_sz;;
  rz) do_rz;;
esac

# Usage: Preferences->Profiles->Advanced->Trigger
# Regular expression: rz waiting to receive.\*\*B0100
# Action: Run Silent Coprocess
# Parameters: /usr/local/bin/iterm2-zmodem.sh sz
# Instant: checked
# Regular expression: \*\*B00000000000000
# Action: Run Silent Coprocess
# Parameters: /usr/local/bin/iterm2-zmodem.sh rz
# Instant: checked