Cacher is the code snippet organizer for pro developers

#!/bin/bash

# define a help printout
function help {
  echo "usage: `basename $0` [-h] [--project-dir dir] [--requirements reqfile] [--url git-url]"
  echo "                   [--virtualenv-dir venv-dir] <project-name>"
  echo ""
  echo "Create a new virtualenv with git cloning and package requirements."
  echo ""
  echo "positional arguments:"
  printf "  project-name\t\tname of the desired project\n"
  echo ""
  echo "optional arguments:"
  printf "  -h, --help\t\tshow this help message and exit\n"
  echo "  --project-dir DIR, -p DIR"
  printf "    \t\t\tdirectory where project will be created (default: PROJECT_HOME)\n"
  echo "  --requirements FILE, -r FILE"
  printf "    \t\t\trequirements file to install python packages (pre-clone)\n"
  echo "  --url URL, -u URL"
  printf "    \t\t\tURL of remote git repository to clone\n"
  echo "  --virtualenv-dir DIR, -v DIR"
  printf "    \t\t\tdirectory where virtualenv will be created (default: WORKON_HOME)\n"
  if [ -z "$1" ]; then
      exit 1
  else
      exit $1
  fi
}

# find the virtualenvwrapper file from known locations
WRAPPER_FILE=
for venv_sh in $HOME/.local/bin/virtualenvwrapper.sh \
               /usr/share/virtualenvwrapper/virtualenvwrapper.sh \
               /usr/local/bin/virtualenvwrapper.sh \
               /usr/bin/virtualenvwrapper.sh; do
  if [ -f $venv_sh ]; then
    WRAPPER_FILE=$venv_sh
    break
  fi
done

# could not find wrapper script; exit
if [ -z "$WRAPPER_FILE" ]; then
  echo "ERROR: Could not locate virtualenvwrapper.sh."
  echo "Make sure virtualenvwrapper is installed and try again."
  exit 2
fi
source $WRAPPER_FILE

# parse through all opts with args
REQ_FILE=
REPO_URL=
while [[ $# -gt 1 ]]; do
  key=$1

  case $key in
    -p|--project-dir)
      PROJECT_HOME=$2
      shift
      ;;
    -r|--requirements)
      REQ_FILE=$2
      shift
      ;;
    -u|--url)
      REPO_URL=$2
      shift
      ;;
    -v|--virtualenv-dir)
      WORKON_HOME=$2
      shift
      ;;
    *)
      echo "ERROR: Unknown option ${key}"
      help
      shift
      ;;
  esac
  shift
done

# parse through opts without args (positional)
if [ ! -z "$1" ]; then
  case $1 in
    -h|--help)
      help 0
      ;;
    *)
      project_name=$1
      ;;
  esac
fi

# whoops, no project name
if [ "$project_name" == "" ]; then
  help;
fi

# create the virtualenv and install packages
echo "Creating project \"$project_name\"..."
export PROJECT_HOME
export WORKON_HOME
if [ -z "$REQ_FILE" ]; then
  mkproject $project_name
else
  # the '-r' allows us to automatically install pip packages
  mkproject -r $REQ_FILE $project_name
fi

# create a project directory and optionally load it with a repo
project_dir=$PROJECT_HOME/$project_name
cd $project_dir
if [ ! -z "$REPO_URL" ]; then
  git clone $REPO_URL .
fi

# enter the virtualenv
workon $project_name