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comparison mercurial/upgrade_utils/actions.py @ 46705:fd55a9eb1507

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revlogv2: allow upgrading to v2 Revlogv2 implies sidedata. Right now sidedata is not really used in production, and Revlogv2 will be used for the first production-ready version of sidedata support. Differential Revision: https://phab.mercurial-scm.org/D9844
author Rapha?l Gom?s <rgomes@octobus.net>
date Wed, 20 Jan 2021 21:14:06 +0100
parents b4c2a2af25e2
children 7d9d9265d40f
comparison
equal deleted inserted replaced
46704:913485776542 46705:fd55a9eb1507
326 326
327 @registerformatvariant 327 @registerformatvariant
328 class sidedata(requirementformatvariant): 328 class sidedata(requirementformatvariant):
329 name = b'sidedata' 329 name = b'sidedata'
330 330
331 _requirement = requirements.SIDEDATA_REQUIREMENT 331 _requirement = requirements.REVLOGV2_REQUIREMENT
332 332
333 default = False 333 default = False
334 334
335 description = _( 335 description = _(
336 b'Allows storage of extra data alongside a revision, ' 336 b'Allows storage of extra data alongside a revision, '
337 b'unlocking various caching options.' 337 b'unlocking various caching options.'
338 ) 338 )
339 339
340 upgrademessage = _(b'Allows storage of extra data alongside a revision.') 340 upgrademessage = _(b'Allows storage of extra data alongside a revision.')
341 341
342 @classmethod
343 def fromrepo(cls, repo):
344 assert cls._requirement is not None
345 return cls._requirement in repo.requirements
346
342 347
343 @registerformatvariant 348 @registerformatvariant
344 class persistentnodemap(requirementformatvariant): 349 class persistentnodemap(requirementformatvariant):
345 name = b'persistent-nodemap' 350 name = b'persistent-nodemap'
346 351
366 description = _(b'Stores copies information alongside changesets.') 371 description = _(b'Stores copies information alongside changesets.')
367 372
368 upgrademessage = _( 373 upgrademessage = _(
369 b'Allows to use more efficient algorithm to deal with ' b'copy tracing.' 374 b'Allows to use more efficient algorithm to deal with ' b'copy tracing.'
370 ) 375 )
376
377
378 @registerformatvariant
379 class revlogv2(requirementformatvariant):
380 name = b'revlog-v2'
381 _requirement = requirements.REVLOGV2_REQUIREMENT
382 default = False
383 description = _(b'Version 2 of the revlog.')
384 upgrademessage = _(b'very experimental')
371 385
372 386
373 @registerformatvariant 387 @registerformatvariant
374 class removecldeltachain(formatvariant): 388 class removecldeltachain(formatvariant):
375 name = b'plain-cl-delta' 389 name = b'plain-cl-delta'
855 An upgrade will not be allowed if the repository doesn't have the 869 An upgrade will not be allowed if the repository doesn't have the
856 requirements returned by this function. 870 requirements returned by this function.
857 """ 871 """
858 return { 872 return {
859 # Introduced in Mercurial 0.9.2. 873 # Introduced in Mercurial 0.9.2.
860 requirements.REVLOGV1_REQUIREMENT,
861 # Introduced in Mercurial 0.9.2.
862 requirements.STORE_REQUIREMENT, 874 requirements.STORE_REQUIREMENT,
863 } 875 }
864 876
865 877
866 def blocksourcerequirements(repo): 878 def blocksourcerequirements(repo):
879 # Upgrade should operate on the actual store, not the shared link. 891 # Upgrade should operate on the actual store, not the shared link.
880 requirements.SHARED_REQUIREMENT, 892 requirements.SHARED_REQUIREMENT,
881 } 893 }
882 894
883 895
896 def check_revlog_version(reqs):
897 """Check that the requirements contain at least one Revlog version"""
898 all_revlogs = {
899 requirements.REVLOGV1_REQUIREMENT,
900 requirements.REVLOGV2_REQUIREMENT,
901 }
902 if not all_revlogs.intersection(reqs):
903 msg = _(b'cannot upgrade repository; missing a revlog version')
904 raise error.Abort(msg)
905
906
884 def check_source_requirements(repo): 907 def check_source_requirements(repo):
885 """Ensure that no existing requirements prevent the repository upgrade""" 908 """Ensure that no existing requirements prevent the repository upgrade"""
886 909
910 check_revlog_version(repo.requirements)
887 required = requiredsourcerequirements(repo) 911 required = requiredsourcerequirements(repo)
888 missingreqs = required - repo.requirements 912 missingreqs = required - repo.requirements
889 if missingreqs: 913 if missingreqs:
890 msg = _(b'cannot upgrade repository; requirement missing: %s') 914 msg = _(b'cannot upgrade repository; requirement missing: %s')
891 missingreqs = b', '.join(sorted(missingreqs)) 915 missingreqs = b', '.join(sorted(missingreqs))
913 requirements.SPARSEREVLOG_REQUIREMENT, 937 requirements.SPARSEREVLOG_REQUIREMENT,
914 requirements.SIDEDATA_REQUIREMENT, 938 requirements.SIDEDATA_REQUIREMENT,
915 requirements.COPIESSDC_REQUIREMENT, 939 requirements.COPIESSDC_REQUIREMENT,
916 requirements.NODEMAP_REQUIREMENT, 940 requirements.NODEMAP_REQUIREMENT,
917 requirements.SHARESAFE_REQUIREMENT, 941 requirements.SHARESAFE_REQUIREMENT,
942 requirements.REVLOGV2_REQUIREMENT,
943 requirements.REVLOGV1_REQUIREMENT,
918 } 944 }
919 for name in compression.compengines: 945 for name in compression.compengines:
920 engine = compression.compengines[name] 946 engine = compression.compengines[name]
921 if engine.available() and engine.revlogheader(): 947 if engine.available() and engine.revlogheader():
922 supported.add(b'exp-compression-%s' % name) 948 supported.add(b'exp-compression-%s' % name)
935 """ 961 """
936 supported = { 962 supported = {
937 requirements.DOTENCODE_REQUIREMENT, 963 requirements.DOTENCODE_REQUIREMENT,
938 requirements.FNCACHE_REQUIREMENT, 964 requirements.FNCACHE_REQUIREMENT,
939 requirements.GENERALDELTA_REQUIREMENT, 965 requirements.GENERALDELTA_REQUIREMENT,
940 requirements.REVLOGV1_REQUIREMENT, 966 requirements.REVLOGV1_REQUIREMENT, # allowed in case of downgrade
941 requirements.STORE_REQUIREMENT, 967 requirements.STORE_REQUIREMENT,
942 requirements.SPARSEREVLOG_REQUIREMENT, 968 requirements.SPARSEREVLOG_REQUIREMENT,
943 requirements.SIDEDATA_REQUIREMENT, 969 requirements.SIDEDATA_REQUIREMENT,
944 requirements.COPIESSDC_REQUIREMENT, 970 requirements.COPIESSDC_REQUIREMENT,
945 requirements.NODEMAP_REQUIREMENT, 971 requirements.NODEMAP_REQUIREMENT,
946 requirements.SHARESAFE_REQUIREMENT, 972 requirements.SHARESAFE_REQUIREMENT,
973 requirements.REVLOGV2_REQUIREMENT,
947 } 974 }
948 for name in compression.compengines: 975 for name in compression.compengines:
949 engine = compression.compengines[name] 976 engine = compression.compengines[name]
950 if engine.available() and engine.revlogheader(): 977 if engine.available() and engine.revlogheader():
951 supported.add(b'exp-compression-%s' % name) 978 supported.add(b'exp-compression-%s' % name)
971 requirements.SPARSEREVLOG_REQUIREMENT, 998 requirements.SPARSEREVLOG_REQUIREMENT,
972 requirements.SIDEDATA_REQUIREMENT, 999 requirements.SIDEDATA_REQUIREMENT,
973 requirements.COPIESSDC_REQUIREMENT, 1000 requirements.COPIESSDC_REQUIREMENT,
974 requirements.NODEMAP_REQUIREMENT, 1001 requirements.NODEMAP_REQUIREMENT,
975 requirements.SHARESAFE_REQUIREMENT, 1002 requirements.SHARESAFE_REQUIREMENT,
1003 requirements.REVLOGV1_REQUIREMENT,
1004 requirements.REVLOGV2_REQUIREMENT,
976 } 1005 }
977 for name in compression.compengines: 1006 for name in compression.compengines:
978 engine = compression.compengines[name] 1007 engine = compression.compengines[name]
979 if engine.available() and engine.revlogheader(): 1008 if engine.available() and engine.revlogheader():
980 supported.add(b'exp-compression-%s' % name) 1009 supported.add(b'exp-compression-%s' % name)
983 return supported 1012 return supported
984 1013
985 1014
986 def check_requirements_changes(repo, new_reqs): 1015 def check_requirements_changes(repo, new_reqs):
987 old_reqs = repo.requirements 1016 old_reqs = repo.requirements
988 1017 check_revlog_version(repo.requirements)
989 support_removal = supportremovedrequirements(repo) 1018 support_removal = supportremovedrequirements(repo)
990 no_remove_reqs = old_reqs - new_reqs - support_removal 1019 no_remove_reqs = old_reqs - new_reqs - support_removal
991 if no_remove_reqs: 1020 if no_remove_reqs:
992 msg = _(b'cannot upgrade repository; requirement would be removed: %s') 1021 msg = _(b'cannot upgrade repository; requirement would be removed: %s')
993 no_remove_reqs = b', '.join(sorted(no_remove_reqs)) 1022 no_remove_reqs = b', '.join(sorted(no_remove_reqs))