activate

#!/usr/bin/env bash

# This file must be used with "source activate" *from bash*
# you cannot run it directly

if [ "${BASH_SOURCE-}" = "$0" ]; then
    echo "You must source this script: \$ source $0" >&2
    exit 33
fi

deactivate () {
    # reset old environment variables

    # ! [ -z ${VAR+_} ] returns true if VAR is declared at all
    # -n is logically identical to ! -z

    # Restore the PATH variable and remove aliases
    if [ -n "${_OLD_VIRTUAL_PATH:+_}" ] ; then
        PATH="$_OLD_VIRTUAL_PATH"
        export PATH
        unset _OLD_VIRTUAL_PATH
        unalias ld-sudo
    fi

    # Restore LD_LIBRARY_PATH variable
    if [ -n "${_OLD_LD_PATH:+_}" ] ; then
        LD_LIBRARY_PATH="$_OLD_LD_PATH"
        export LD_LIBRARY_PATH
        unset _OLD_LD_PATH
    else
      unset LD_LIBRARY_PATH
    fi

    # Restore PKG_CONFIG_PATH variable
    if [ -n "${_OLD_PKG_CONFIG_PATH:+_}" ] ; then
        PKG_CONFIG_PATH="$_OLD_PKG_CONFIG_PATH"
        export PKG_CONFIG_PATH
        unset _OLD_PKG_CONFIG_PATH
    else
      unset PKG_CONFIG_PATH
    fi

    # This should detect bash and zsh, which have a hash command that must
    # be called to get it to forget past commands.  Without forgetting
    # past commands the $PATH changes we made may not be respected
    if [ -n "${BASH-}" ] || [ -n "${ZSH_VERSION-}" ] ; then
        hash -r 2>/dev/null
    fi

    if [ -n "${_OLD_VIRTUAL_PS1+_}" ] ; then
        PS1="$_OLD_VIRTUAL_PS1"
        export PS1
        unset _OLD_VIRTUAL_PS1
    fi

    unset VIRTUAL_ENV
}

# Always use the directory of the script as root for the virtual environment!
VIRTUAL_ENV="$( cd "$( dirname "${BASH_SOURCE[0]}" )" >/dev/null 2>&1 && pwd )"

# Save current PATH variable and setup new PATH
_OLD_VIRTUAL_PATH="$PATH"
PATH="$VIRTUAL_ENV/bin:$PATH"
export PATH

# Indicate virtualenv is active by modifying PS1 prompt
if [ -z "${VIRTUAL_ENV_DISABLE_PROMPT-}" ] ; then
    _OLD_VIRTUAL_PS1="${PS1-}"
    PS1="($(basename "$VIRTUAL_ENV")) ${PS1-}"
    export PS1
fi

# Configure new LD_LIBRARY_PATH
if [ -z ${LD_LIBRARY_PATH+x} ]; then
	LD_LIBRARY_PATH="$VIRTUAL_ENV/lib"
else
  _OLD_LD_PATH="$LD_LIBRARY_PATH"
  LD_LIBRARY_PATH="$VIRTUAL_ENV/lib:$LD_LIBRARY_PATH"
fi

export LD_LIBRARY_PATH;

# Configure new PKG_CONFIG_PATH
if [ -z ${PKG_CONFIG_PATH+x} ]; then
    PKG_CONFIG_PATH="$VIRTUAL_ENV/lib/pkgconfig"
else
    _OLD_PKG_CONFIG_PATH="$PKG_CONFIG_PATH"
    PKG_CONFIG_PATH="$VIRTUAL_ENV/lib/pkgconfig"
fi

export PKG_CONFIG_PATH;

# Create special alias to perform sudo operations with variables set
alias ld-sudo='sudo PATH="$PATH" HOME="$HOME" PKG_CONFIG_PATH="$PKG_CONFIG_PATH" LD_LIBRARY_PATH="$LD_LIBRARY_PATH"'

# Check fusermount permissions and prompt to configure properly
if [ -z "$(find "$VIRTUAL_ENV"/bin/fusermount3 -user root)" ]; then
  sudo chown root:root "$VIRTUAL_ENV"/bin/fusermount3
  sudo chmod u+s "$VIRTUAL_ENV"/bin/fusermount3
fi

# This should detect bash and zsh, which have a hash command that must
# be called to get it to forget past commands.  Without forgetting
# past commands the $PATH changes we made may not be respected
if [ -n "${BASH-}" ] || [ -n "${ZSH_VERSION-}" ] ; then
    hash -r 2>/dev/null
fi