#!/usr/bin/env bash
# Copyright 2015 Pants project contributors (see CONTRIBUTORS.md).
# Licensed under the Apache License, Version 2.0 (see LICENSE).
# =============================== NOTE ===============================
# This pants bootstrap script comes from the pantsbuild/setup
# project and is intended to be checked into your code repository so
# that any developer can check out your code and be building it with
# pants with no prior setup needed.
#
# You can learn more here: <https://pantsbuild.github.io/setup>
# ====================================================================
PYTHON=${PYTHON:-$(which python2.7)}
PANTS_HOME="${PANTS_HOME:-${HOME}/.cache/pants/setup}"
PANTS_BOOTSTRAP="${PANTS_HOME}/bootstrap-$(uname -s)-$(uname -m)"
VENV_VERSION=13.1.0
VENV_PACKAGE=virtualenv-${VENV_VERSION}
VENV_TARBALL=${VENV_PACKAGE}.tar.gz
# The high-level flow:
# 1.) Grab pants version from pants.ini or default to latest.
# 2.) Check for a venv via a naming/path convention and execute if found.
# 3.) Otherwise create venv and re-exec self.
#
# After that pants itself will handle making sure any requested plugins
# are installed and up to date.
function tempdir {
  mktemp -d "$1"/pants.XXXXXX
}
# TODO(John Sirois): GC race loser tmp dirs leftover from bootstrap_XXX
# functions.  Any tmp dir w/o a symlink pointing to it can go.
function bootstrap_venv {
  if [[ ! -d "${PANTS_BOOTSTRAP}/${VENV_PACKAGE}" ]]
  then
    (
      mkdir -p "${PANTS_BOOTSTRAP}" && \
      staging_dir=$(tempdir "${PANTS_BOOTSTRAP}") && \
      cd "${staging_dir}" && \
      curl -O <https://pypi.python.org/packages/source/v/virtualenv/${VENV_TARBALL}> && \
      tar -xzf ${VENV_TARBALL} && \
      ln -s "${staging_dir}/${VENV_PACKAGE}" "${staging_dir}/latest" && \
      mv "${staging_dir}/latest" "${PANTS_BOOTSTRAP}/${VENV_PACKAGE}"
    ) 1>&2
  fi
  echo "${PANTS_BOOTSTRAP}/${VENV_PACKAGE}"
}
function bootstrap_pants {
  pants_requirement="pantsbuild.pants"
  pants_version=$(
    grep -E "^[[:space:]]*pants_version" pants.ini 2>/dev/null | \
      cut -f2 -d: | tr -d " "
  )
  if [[ -n "${pants_version}" ]]
  then
    pants_requirement="${pants_requirement}==${pants_version}"
  else
    pants_version="unspecified"
  fi
  if [[ ! -d "${PANTS_BOOTSTRAP}/${pants_version}" ]]
  then
    (
      venv_path="$(bootstrap_venv)" && \
      staging_dir=$(tempdir "${PANTS_BOOTSTRAP}") && \
      "${PYTHON}" "${venv_path}/virtualenv.py" "${staging_dir}/install" && \
      source "${staging_dir}/install/bin/activate" && \
      pip install "${pants_requirement}" && \
      ln -s "${staging_dir}/install" "${staging_dir}/${pants_version}" && \
      mv "${staging_dir}/${pants_version}" "${PANTS_BOOTSTRAP}/${pants_version}"
    ) 1>&2
  fi
  echo "${PANTS_BOOTSTRAP}/${pants_version}"
}
pants_dir=$(bootstrap_pants) && \
exec "${pants_dir}/bin/pants" "$@"

./pants clean-all binary src/main/python/server::

pants_version

pants_version: 1.4.0

root@809f93390ddf:/build# ./local_build.sh 
New python executable in /root/.cache/pants/setup/bootstrap-Linux-x86_64/pants.nrbBSH/install/bin/python2.7
Also creating executable in /root/.cache/pants/setup/bootstrap-Linux-x86_64/pants.nrbBSH/install/bin/python
Installing setuptools, pip, wheel...done.
Collecting pantsbuild.pants==1.4.0
  Could not find a version that satisfies the requirement pantsbuild.pants==1.4.0 (from versions: )
No matching distribution found for pantsbuild.pants==1.4.0
./pants: line 84: /root/.cache/pants/setup/bootstrap-Linux-x86_64/1.4.0/bin/pants: No such file or directory