providers.py 11 KB

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  1. # ex:ts=4:sw=4:sts=4:et
  2. # -*- tab-width: 4; c-basic-offset: 4; indent-tabs-mode: nil -*-
  3. #
  4. # Copyright (C) 2003, 2004 Chris Larson
  5. # Copyright (C) 2003, 2004 Phil Blundell
  6. # Copyright (C) 2003 - 2005 Michael 'Mickey' Lauer
  7. # Copyright (C) 2005 Holger Hans Peter Freyther
  8. # Copyright (C) 2005 ROAD GmbH
  9. # Copyright (C) 2006 Richard Purdie
  10. #
  11. # This program is free software; you can redistribute it and/or modify
  12. # it under the terms of the GNU General Public License version 2 as
  13. # published by the Free Software Foundation.
  14. #
  15. # This program is distributed in the hope that it will be useful,
  16. # but WITHOUT ANY WARRANTY; without even the implied warranty of
  17. # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  18. # GNU General Public License for more details.
  19. #
  20. # You should have received a copy of the GNU General Public License along
  21. # with this program; if not, write to the Free Software Foundation, Inc.,
  22. # 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  23. import os, re
  24. from bb import data, utils
  25. import bb
  26. class NoProvider(Exception):
  27. """Exception raised when no provider of a build dependency can be found"""
  28. class NoRProvider(Exception):
  29. """Exception raised when no provider of a runtime dependency can be found"""
  30. def sortPriorities(pn, dataCache, pkg_pn = None):
  31. """
  32. Reorder pkg_pn by file priority and default preference
  33. """
  34. if not pkg_pn:
  35. pkg_pn = dataCache.pkg_pn
  36. files = pkg_pn[pn]
  37. priorities = {}
  38. for f in files:
  39. priority = dataCache.bbfile_priority[f]
  40. preference = dataCache.pkg_dp[f]
  41. if priority not in priorities:
  42. priorities[priority] = {}
  43. if preference not in priorities[priority]:
  44. priorities[priority][preference] = []
  45. priorities[priority][preference].append(f)
  46. pri_list = priorities.keys()
  47. pri_list.sort(lambda a, b: a - b)
  48. tmp_pn = []
  49. for pri in pri_list:
  50. pref_list = priorities[pri].keys()
  51. pref_list.sort(lambda a, b: b - a)
  52. tmp_pref = []
  53. for pref in pref_list:
  54. tmp_pref.extend(priorities[pri][pref])
  55. tmp_pn = [tmp_pref] + tmp_pn
  56. return tmp_pn
  57. def findPreferredProvider(pn, cfgData, dataCache, pkg_pn = None, item = None):
  58. """
  59. Find the first provider in pkg_pn with a PREFERRED_VERSION set.
  60. """
  61. preferred_file = None
  62. preferred_ver = None
  63. localdata = data.createCopy(cfgData)
  64. bb.data.setVar('OVERRIDES', "pn-%s:%s:%s" % (pn, pn, data.getVar('OVERRIDES', localdata)), localdata)
  65. bb.data.update_data(localdata)
  66. preferred_v = bb.data.getVar('PREFERRED_VERSION_%s' % pn, localdata, True)
  67. if preferred_v:
  68. m = re.match('(\d+:)*(.*)(_.*)*', preferred_v)
  69. if m:
  70. if m.group(1):
  71. preferred_e = int(m.group(1)[:-1])
  72. else:
  73. preferred_e = None
  74. preferred_v = m.group(2)
  75. if m.group(3):
  76. preferred_r = m.group(3)[1:]
  77. else:
  78. preferred_r = None
  79. else:
  80. preferred_e = None
  81. preferred_r = None
  82. for file_set in pkg_pn:
  83. for f in file_set:
  84. pe,pv,pr = dataCache.pkg_pepvpr[f]
  85. if preferred_v == pv and (preferred_r == pr or preferred_r == None) and (preferred_e == pe or preferred_e == None):
  86. preferred_file = f
  87. preferred_ver = (pe, pv, pr)
  88. break
  89. if preferred_file:
  90. break;
  91. if preferred_r:
  92. pv_str = '%s-%s' % (preferred_v, preferred_r)
  93. else:
  94. pv_str = preferred_v
  95. if not (preferred_e is None):
  96. pv_str = '%s:%s' % (preferred_e, pv_str)
  97. itemstr = ""
  98. if item:
  99. itemstr = " (for item %s)" % item
  100. if preferred_file is None:
  101. bb.msg.note(1, bb.msg.domain.Provider, "preferred version %s of %s not available%s" % (pv_str, pn, itemstr))
  102. else:
  103. bb.msg.debug(1, bb.msg.domain.Provider, "selecting %s as PREFERRED_VERSION %s of package %s%s" % (preferred_file, pv_str, pn, itemstr))
  104. return (preferred_ver, preferred_file)
  105. def findLatestProvider(pn, cfgData, dataCache, file_set):
  106. """
  107. Return the highest version of the providers in file_set.
  108. Take default preferences into account.
  109. """
  110. latest = None
  111. latest_p = 0
  112. latest_f = None
  113. for file_name in file_set:
  114. pe,pv,pr = dataCache.pkg_pepvpr[file_name]
  115. dp = dataCache.pkg_dp[file_name]
  116. if (latest is None) or ((latest_p == dp) and (utils.vercmp(latest, (pe, pv, pr)) < 0)) or (dp > latest_p):
  117. latest = (pe, pv, pr)
  118. latest_f = file_name
  119. latest_p = dp
  120. return (latest, latest_f)
  121. def findBestProvider(pn, cfgData, dataCache, pkg_pn = None, item = None):
  122. """
  123. If there is a PREFERRED_VERSION, find the highest-priority bbfile
  124. providing that version. If not, find the latest version provided by
  125. an bbfile in the highest-priority set.
  126. """
  127. sortpkg_pn = sortPriorities(pn, dataCache, pkg_pn)
  128. # Find the highest priority provider with a PREFERRED_VERSION set
  129. (preferred_ver, preferred_file) = findPreferredProvider(pn, cfgData, dataCache, sortpkg_pn, item)
  130. # Find the latest version of the highest priority provider
  131. (latest, latest_f) = findLatestProvider(pn, cfgData, dataCache, sortpkg_pn[0])
  132. if preferred_file is None:
  133. preferred_file = latest_f
  134. preferred_ver = latest
  135. return (latest, latest_f, preferred_ver, preferred_file)
  136. def _filterProviders(providers, item, cfgData, dataCache):
  137. """
  138. Take a list of providers and filter/reorder according to the
  139. environment variables and previous build results
  140. """
  141. eligible = []
  142. preferred_versions = {}
  143. sortpkg_pn = {}
  144. # The order of providers depends on the order of the files on the disk
  145. # up to here. Sort pkg_pn to make dependency issues reproducible rather
  146. # than effectively random.
  147. providers.sort()
  148. # Collate providers by PN
  149. pkg_pn = {}
  150. for p in providers:
  151. pn = dataCache.pkg_fn[p]
  152. if pn not in pkg_pn:
  153. pkg_pn[pn] = []
  154. pkg_pn[pn].append(p)
  155. bb.msg.debug(1, bb.msg.domain.Provider, "providers for %s are: %s" % (item, pkg_pn.keys()))
  156. # First add PREFERRED_VERSIONS
  157. for pn in pkg_pn.keys():
  158. sortpkg_pn[pn] = sortPriorities(pn, dataCache, pkg_pn)
  159. preferred_versions[pn] = findPreferredProvider(pn, cfgData, dataCache, sortpkg_pn[pn], item)
  160. if preferred_versions[pn][1]:
  161. eligible.append(preferred_versions[pn][1])
  162. # Now add latest verisons
  163. for pn in pkg_pn.keys():
  164. if pn in preferred_versions and preferred_versions[pn][1]:
  165. continue
  166. preferred_versions[pn] = findLatestProvider(pn, cfgData, dataCache, sortpkg_pn[pn][0])
  167. eligible.append(preferred_versions[pn][1])
  168. if len(eligible) == 0:
  169. bb.msg.error(bb.msg.domain.Provider, "no eligible providers for %s" % item)
  170. return 0
  171. # If pn == item, give it a slight default preference
  172. # This means PREFERRED_PROVIDER_foobar defaults to foobar if available
  173. for p in providers:
  174. pn = dataCache.pkg_fn[p]
  175. if pn != item:
  176. continue
  177. (newvers, fn) = preferred_versions[pn]
  178. if not fn in eligible:
  179. continue
  180. eligible.remove(fn)
  181. eligible = [fn] + eligible
  182. return eligible
  183. def filterProviders(providers, item, cfgData, dataCache):
  184. """
  185. Take a list of providers and filter/reorder according to the
  186. environment variables and previous build results
  187. Takes a "normal" target item
  188. """
  189. eligible = _filterProviders(providers, item, cfgData, dataCache)
  190. prefervar = bb.data.getVar('PREFERRED_PROVIDER_%s' % item, cfgData, 1)
  191. if prefervar:
  192. dataCache.preferred[item] = prefervar
  193. foundUnique = False
  194. if item in dataCache.preferred:
  195. for p in eligible:
  196. pn = dataCache.pkg_fn[p]
  197. if dataCache.preferred[item] == pn:
  198. bb.msg.note(2, bb.msg.domain.Provider, "selecting %s to satisfy %s due to PREFERRED_PROVIDERS" % (pn, item))
  199. eligible.remove(p)
  200. eligible = [p] + eligible
  201. foundUnique = True
  202. break
  203. bb.msg.debug(1, bb.msg.domain.Provider, "sorted providers for %s are: %s" % (item, eligible))
  204. return eligible, foundUnique
  205. def filterProvidersRunTime(providers, item, cfgData, dataCache):
  206. """
  207. Take a list of providers and filter/reorder according to the
  208. environment variables and previous build results
  209. Takes a "runtime" target item
  210. """
  211. eligible = _filterProviders(providers, item, cfgData, dataCache)
  212. # Should use dataCache.preferred here?
  213. preferred = []
  214. preferred_vars = []
  215. for p in eligible:
  216. pn = dataCache.pkg_fn[p]
  217. provides = dataCache.pn_provides[pn]
  218. for provide in provides:
  219. prefervar = bb.data.getVar('PREFERRED_PROVIDER_%s' % provide, cfgData, 1)
  220. if prefervar == pn:
  221. var = "PREFERRED_PROVIDERS_%s = %s" % (provide, prefervar)
  222. bb.msg.note(2, bb.msg.domain.Provider, "selecting %s to satisfy runtime %s due to %s" % (pn, item, var))
  223. preferred_vars.append(var)
  224. eligible.remove(p)
  225. eligible = [p] + eligible
  226. preferred.append(p)
  227. break
  228. numberPreferred = len(preferred)
  229. if numberPreferred > 1:
  230. bb.msg.error(bb.msg.domain.Provider, "Conflicting PREFERRED_PROVIDERS entries were found which resulted in an attempt to select multiple providers (%s) for runtime dependecy %s\nThe entries resulting in this conflict were: %s" % (preferred, item, preferred_vars))
  231. bb.msg.debug(1, bb.msg.domain.Provider, "sorted providers for %s are: %s" % (item, eligible))
  232. return eligible, numberPreferred
  233. def getRuntimeProviders(dataCache, rdepend):
  234. """
  235. Return any providers of runtime dependency
  236. """
  237. rproviders = []
  238. if rdepend in dataCache.rproviders:
  239. rproviders += dataCache.rproviders[rdepend]
  240. if rdepend in dataCache.packages:
  241. rproviders += dataCache.packages[rdepend]
  242. if rproviders:
  243. return rproviders
  244. # Only search dynamic packages if we can't find anything in other variables
  245. for pattern in dataCache.packages_dynamic:
  246. pattern = pattern.replace('+', "\+")
  247. try:
  248. regexp = re.compile(pattern)
  249. except:
  250. bb.msg.error(bb.msg.domain.Provider, "Error parsing re expression: %s" % pattern)
  251. raise
  252. if regexp.match(rdepend):
  253. rproviders += dataCache.packages_dynamic[pattern]
  254. return rproviders