virtenv

#!/bin/bash
#
# This is a simple wrapper for generating commands for executables within a
# python virtualenv.
#
# Usage: virtenv env-name command [arg, arg, ...]
#
#   env-name    The name of the virtualenv for the command to be run in.
#   command     The command within the virtualenv's path to be run. The base path is usually $VIRTUALENV_HOME/$VIRTUALENV/bin.
#   arg         Any remaining arguments are passed to the command itself.
#
# Example:
#
# ./virtenv myapp pip install -r /some/path/to/requirements.txt
#
# is the same as running:
#
# $VIRTUALENV_HOME/myapp/bin/pip install -r /some/path/to/requirements.txt


print_usage()
{
    echo "Usage: `basename $0` env-name command [arg, arg...]"
    echo
    echo "A simple wrapper for generating commands to be run within a python virtualenv."
    echo
    echo -e "\tenv-name\tThe name of the virtualenv for the command to be run in."
    echo -e "\tcommand\t\tThe command within the virtualenv's path to be run. The base path is usually \$VIRTUALENV_HOME/\$VIRTUALENV/bin."
    echo -e "\targ\t\tAny remaining arguments are passed to the command itself."
    echo
    echo "Example:"
    echo
    echo "./virtenv myapp pip install -r /some/path/to/requirements.txt"
    echo
    echo "is the same as running:"
    echo
    echo "\$VIRTUALENV_HOME/myapp/bin/pip install -r /some/path/to/requirements.txt"
    echo
    exit 1;
}

[[ "$#" -lt 2 ]] && print_usage

while getopts ":h" OPT ; do
    case $OPT in
        h)
            print_usage
            ;;
    esac
done


# stash args
env=$1
cmd=$2

# pop of first two
shift
shift

VENV=~/.virtualenvs/$env
CMD=$VENV/bin/$cmd

if [ ! -d $VENV ] ; then
    echo "Could not find virtualenv: $env"
    exit 1
fi

if [ ! -e $CMD ] ; then
    echo "Command not found: $cmd"
    exit 1
fi

if [ ! -x $CMD ] ; then
    echo "Command not executable: $cmd"
    exit 1
fi

${CMD} "${@}"