linux-install-bazel

#!/bin/bash
#
# Copyright (C) Extensible Service Proxy Authors
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# ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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################################################################################
#
# May require sudo login.

if [[ "$(uname)" != "Linux" ]]; then
  echo "Run on Linux only."
  exit 1
fi

DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")/.." && pwd)"
. ${DIR}/all-utilities || { echo "Cannot load Bash utilities" ; exit 1 ; }

BAZEL_VERSION='0.21.0'
BAZEL_BASE_URL='https://github.com/bazelbuild/bazel/releases/download'
BAZEL_SH="bazel-${BAZEL_VERSION}-installer-linux-x86_64.sh"
BAZEL_URL="${BAZEL_BASE_URL}/${BAZEL_VERSION}/${BAZEL_SH}"
BAZEL_DIRECTORY="${TOOLS_DIR}/bazel"

function update_bazel() {
  local bazel_current="$(bazel version | grep -oh '[0-9]*\.[0-9]*\.[0-9]*')" \
    || bazel_current='none'

  if [[ -d "${BAZEL_DIRECTORY}" ]]; then
    mkdir -p "${BAZEL_DIRECTORY}"
  fi

  if [[ "${BAZEL_VERSION}" != "${bazel_current}" ]]; then
    retry -n 3 ${SUDO} wget -q -nc -P "${BAZEL_DIRECTORY}" "${BAZEL_URL}" \
      || error_exit "Could not download bazel"
    ${SUDO} chmod +x "${BAZEL_DIRECTORY}/${BAZEL_SH}" \
      || error_exit "Could not mark bazel shell as executable"
    ${SUDO} "${BAZEL_DIRECTORY}/${BAZEL_SH}" \
      || error_exit "Could not install bazel"
    set_bazel
    ${SUDO} ${BAZEL} shutdown
    ${SUDO} rm -rf ${HOME}/.cache/bazel
  fi
  echo 'Bazel up-to-date.'
}