virtualenv

#!/usr/bin/env bash
# Wrapper for self-bootstrapping virtualenv

set -e

VIRTUALENV_VERSION=16.6.2
VIRTUALENV_PACKAGE_LOCATION=${VIRTUALENV_PACKAGE_LOCATION:-https://pypi.io/packages/source/v/virtualenv}

REPO_ROOT=$(cd "$(dirname "${BASH_SOURCE[0]}")" && git rev-parse --show-toplevel)

# shellcheck source=build-support/common.sh
source "${REPO_ROOT}/build-support/common.sh"

# Locate the binary's path to log to user or die gracefully if not found.
if command -v "${PY}" >/dev/null; then
  PY="$(command -v "${PY}")"
else
  die "No ${PY} interpreter found on the path. Python will not work!"
fi

log "Using python at ${PY}"

HERE=$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)
if ! [ -f "${HERE}/virtualenv.dist/BOOTSTRAPPED-${VIRTUALENV_VERSION}" ]; then
  pushd "${HERE}" >/dev/null
    VIRTUALENV_PACKAGE_FULL_URL="${VIRTUALENV_PACKAGE_LOCATION}/virtualenv-${VIRTUALENV_VERSION}.tar.gz"
    log "Downloading ${VIRTUALENV_PACKAGE_FULL_URL}..."
    curl -#L -O "${VIRTUALENV_PACKAGE_FULL_URL}" || \
      die "Failed to download ${VIRTUALENV_PACKAGE_FULL_URL}."
    rm -rf virtualenv-${VIRTUALENV_VERSION}
    tar zxf virtualenv-${VIRTUALENV_VERSION}.tar.gz || \
      die "Failed to extract ${VIRTUALENV_PACKAGE_FULL_URL}."
    # TODO(ksweeney): Checksum
    touch virtualenv-${VIRTUALENV_VERSION}/BOOTSTRAPPED-${VIRTUALENV_VERSION} && \
      rm -rf virtualenv.dist && \
      mv -f virtualenv-${VIRTUALENV_VERSION} virtualenv.dist
  popd >/dev/null
fi

exec "${PY}" "${HERE}/virtualenv.dist/virtualenv.py" "$@"