gen-lockedsig-cache 3.1 KB

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  1. #!/usr/bin/env python3
  2. #
  3. # SPDX-License-Identifier: GPL-2.0-only
  4. #
  5. import os
  6. import sys
  7. import shutil
  8. import errno
  9. import time
  10. def mkdir(d):
  11. try:
  12. os.makedirs(d)
  13. except OSError as e:
  14. if e.errno != errno.EEXIST:
  15. raise e
  16. # extract the hash from past the last colon to last underscore
  17. def extract_sha(filename):
  18. return filename.split(':')[7].split('_')[0]
  19. # get all files in a directory, extract hash and make
  20. # a map from hash to list of file with that hash
  21. def map_sha_to_files(dir_, prefix, sha_map):
  22. sstate_prefix_path = dir_ + '/' + prefix + '/'
  23. sstate_files = os.listdir(sstate_prefix_path)
  24. for f in sstate_files:
  25. try:
  26. sha = extract_sha(f)
  27. if sha not in sha_map:
  28. sha_map[sha] = []
  29. sha_map[sha].append(sstate_prefix_path + f)
  30. except IndexError:
  31. continue
  32. # given a prefix build a map of hash to list of files
  33. def build_sha_cache(prefix):
  34. sha_map = {}
  35. sstate_dir = sys.argv[2]
  36. map_sha_to_files(sstate_dir, prefix, sha_map)
  37. native_sstate_dir = sys.argv[2] + '/' + sys.argv[4]
  38. map_sha_to_files(native_sstate_dir, prefix, sha_map)
  39. return sha_map
  40. if len(sys.argv) < 5:
  41. print("Incorrect number of arguments specified")
  42. print("syntax: gen-lockedsig-cache <locked-sigs.inc> <input-cachedir> <output-cachedir> <nativelsbstring> [filterfile]")
  43. sys.exit(1)
  44. filterlist = []
  45. if len(sys.argv) > 5:
  46. print('Reading filter file %s' % sys.argv[5])
  47. with open(sys.argv[5]) as f:
  48. for l in f.readlines():
  49. if ":" in l:
  50. filterlist.append(l.rstrip())
  51. print('Reading %s' % sys.argv[1])
  52. sigs = []
  53. with open(sys.argv[1]) as f:
  54. for l in f.readlines():
  55. if ":" in l:
  56. task, sig = l.split()[0].rsplit(':', 1)
  57. if filterlist and not task in filterlist:
  58. print('Filtering out %s' % task)
  59. else:
  60. sigs.append(sig)
  61. print('Gathering file list')
  62. start_time = time.perf_counter()
  63. files = set()
  64. sstate_content_cache = {}
  65. for s in sigs:
  66. prefix = s[:2]
  67. if prefix not in sstate_content_cache:
  68. sstate_content_cache[prefix] = build_sha_cache(prefix)
  69. for f in sstate_content_cache[prefix][s]:
  70. files.add(f)
  71. elapsed = time.perf_counter() - start_time
  72. print("Gathering file list took %.1fs" % elapsed)
  73. print('Processing files')
  74. for f in files:
  75. sys.stdout.write('Processing %s... ' % f)
  76. _, ext = os.path.splitext(f)
  77. if not ext in ['.tgz', '.siginfo', '.sig']:
  78. # Most likely a temp file, skip it
  79. print('skipping')
  80. continue
  81. dst = os.path.join(sys.argv[3], os.path.relpath(f, sys.argv[2]))
  82. destdir = os.path.dirname(dst)
  83. mkdir(destdir)
  84. src = os.path.realpath(f)
  85. if os.path.exists(dst):
  86. os.remove(dst)
  87. if (os.stat(src).st_dev == os.stat(destdir).st_dev):
  88. print('linking')
  89. try:
  90. os.link(src, dst)
  91. except OSError as e:
  92. print('hard linking failed, copying')
  93. shutil.copyfile(src, dst)
  94. else:
  95. print('copying')
  96. shutil.copyfile(src, dst)
  97. print('Done!')