"""Collection of utilities to work with gclient."""

from __future__ import absolute_import
import imp
import logging
import os
import pathlib

from helpers import git_utils

_DEPOT_TOOLS_SEARCH_PATHS = [
    # Newer containers don't include depot_tools so search for it in the
    # manifest. This is the preferred version because it will be pinned on
    # release branches and track upstream on master.
    pathlib.Path('/workspace/checkout/chromium/tools/depot_tools'),
    # Legacy containers have depot_tools installed at this path.
    pathlib.Path('/workspace/depot_tools'),
]


def find_depot_tools():
  for path in _DEPOT_TOOLS_SEARCH_PATHS:
    if path.exists():
      return path

  raise ValueError('Cannot find a suitable installation of depot_tools')


def disable_depot_tools_auto_update_cmd():
  depot_tools_path = find_depot_tools()
  return [
      'python3',
      str(depot_tools_path / 'update_depot_tools_toggle.py'),
      '--disable',
  ]


def gclient_sync_cmd(executor, jobs=None, extra_args=None):
  """Returns the command list to run gclient sync."""
  depot_tools_path = find_depot_tools()
  logging.info(
      'Using depot_tools at %s (%s)',
      depot_tools_path,
      git_utils.get_head_sha(executor, str(depot_tools_path)),
  )

  # See go/authenticating-cipd-on-nest-infra for more context on this command.
  luci_auth_wrapped_cmd = [
      str(depot_tools_path / 'luci-auth'), 'context', '-disable-git-auth', '-service-account-json',
      ':gce', '--',
      str(depot_tools_path / 'gclient'), 'sync', '--force', '--with_branch_heads',
      '--delete_unversioned_trees', '--reset'
  ]

  if jobs is not None:
    luci_auth_wrapped_cmd.append('--jobs={}'.format(jobs))
  if extra_args is not None:
    luci_auth_wrapped_cmd.extend(extra_args)

  return luci_auth_wrapped_cmd