common.py 2.7 KB

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  1. #!/usr/bin/env python
  2. # Licensed to Cloudera, Inc. under one
  3. # or more contributor license agreements. See the NOTICE file
  4. # distributed with this work for additional information
  5. # regarding copyright ownership. Cloudera, Inc. licenses this file
  6. # to you under the Apache License, Version 2.0 (the
  7. # "License"); you may not use this file except in compliance
  8. # with the License. You may obtain a copy of the License at
  9. #
  10. # http://www.apache.org/licenses/LICENSE-2.0
  11. #
  12. # Unless required by applicable law or agreed to in writing, software
  13. # distributed under the License is distributed on an "AS IS" BASIS,
  14. # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  15. # See the License for the specific language governing permissions and
  16. # limitations under the License.
  17. import glob
  18. import logging
  19. import os
  20. import sys
  21. from posixpath import curdir, sep, pardir, join
  22. # The root of the Hue installation
  23. INSTALL_ROOT = os.path.realpath(os.path.join(os.path.dirname(__file__), '..', '..'))
  24. # The apps location
  25. APPS_ROOT = os.path.join(INSTALL_ROOT, 'apps')
  26. # The Hue config directory
  27. HUE_CONF_DIR = os.path.join(INSTALL_ROOT, 'desktop', 'conf')
  28. # Virtual env
  29. VIRTUAL_ENV = os.path.join(INSTALL_ROOT, 'build', 'env')
  30. # The Python executable in virtualenv
  31. ENV_PYTHON = os.path.join(VIRTUAL_ENV, 'bin', 'python')
  32. def cmp_version(ver1, ver2):
  33. """Compare two version strings in the form of 1.2.34"""
  34. return cmp(ver1.split('.'), ver2.split('.'))
  35. def _get_python_lib_dir():
  36. glob_path = os.path.join(VIRTUAL_ENV, 'lib', 'python*')
  37. res = glob.glob(glob_path)
  38. if len(res) == 0:
  39. raise SystemError("Cannot find a Python installation in %s. "
  40. "Did you do `make hue'?" % glob_path)
  41. elif len(res) > 1:
  42. raise SystemError("Found multiple Python installations in %s. "
  43. "Please `make clean' first." % glob_path)
  44. return res[0]
  45. def _get_python_site_packages_dir():
  46. return os.path.join(_get_python_lib_dir(), 'site-packages')
  47. # Creates os.path.relpath for Python 2.4 and 2.5
  48. if not hasattr(os.path, 'relpath'):
  49. # default to posixpath definition
  50. # no windows support
  51. def relpath(path, start=os.path.curdir):
  52. """Return a relative version of a path"""
  53. if not path:
  54. raise ValueError("no path specified")
  55. start_list = os.path.abspath(start).split(os.path.sep)
  56. path_list = os.path.abspath(path).split(os.path.sep)
  57. # Work out how much of the filepath is shared by start and path.
  58. i = len(os.path.commonprefix([start_list, path_list]))
  59. rel_list = [os.path.pardir] * (len(start_list)-i) + path_list[i:]
  60. if not rel_list:
  61. return os.path.curdir
  62. return os.path.join(*rel_list)
  63. os.path.relpath = relpath