Open the current directory with subl (sublime text) -- optionally using a project file.

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#!/bin/bash

# Chmod this u+x and put it in your $PATH
# Open the first .sublime-project or the working dir
# in SublimeText assumes that `subl` is in your path

for f in ./*.sublime-project; do
  if [ -e "$f" ]
  then
    subl --project "$f"
  else
    subl .
  fi
  break
done