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comparison mercurial/upgrade_utils/actions.py @ 46049:a2a59cde9b9f

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upgrade: gather code about source checking together They just moved in the same file, now they are grouped together and documented. Differential Revision: https://phab.mercurial-scm.org/D9483
author Pierre-Yves David <pierre-yves.david@octobus.net>
date Tue, 01 Dec 2020 15:54:38 +0100
parents f4f956342cf1
children 72b7b4bf3e65
comparison
equal deleted inserted replaced
46048:f4f956342cf1 46049:a2a59cde9b9f
20 # list of requirements that request a clone of all revlog if added/removed 20 # list of requirements that request a clone of all revlog if added/removed
21 RECLONES_REQUIREMENTS = { 21 RECLONES_REQUIREMENTS = {
22 b'generaldelta', 22 b'generaldelta',
23 requirements.SPARSEREVLOG_REQUIREMENT, 23 requirements.SPARSEREVLOG_REQUIREMENT,
24 } 24 }
25
26
27 def requiredsourcerequirements(repo):
28 """Obtain requirements required to be present to upgrade a repo.
29
30 An upgrade will not be allowed if the repository doesn't have the
31 requirements returned by this function.
32 """
33 return {
34 # Introduced in Mercurial 0.9.2.
35 b'revlogv1',
36 # Introduced in Mercurial 0.9.2.
37 b'store',
38 }
39
40
41 def blocksourcerequirements(repo):
42 """Obtain requirements that will prevent an upgrade from occurring.
43
44 An upgrade cannot be performed if the source repository contains a
45 requirements in the returned set.
46 """
47 return {
48 # The upgrade code does not yet support these experimental features.
49 # This is an artificial limitation.
50 requirements.TREEMANIFEST_REQUIREMENT,
51 # This was a precursor to generaldelta and was never enabled by default.
52 # It should (hopefully) not exist in the wild.
53 b'parentdelta',
54 # Upgrade should operate on the actual store, not the shared link.
55 requirements.SHARED_REQUIREMENT,
56 }
57 25
58 26
59 def supportremovedrequirements(repo): 27 def supportremovedrequirements(repo):
60 """Obtain requirements that can be removed during an upgrade. 28 """Obtain requirements that can be removed during an upgrade.
61 29
665 # e.g. adding generaldelta could schedule parent redeltas. 633 # e.g. adding generaldelta could schedule parent redeltas.
666 634
667 return newactions 635 return newactions
668 636
669 637
638 ### Code checking if a repository can got through the upgrade process at all. #
639
640
641 def requiredsourcerequirements(repo):
642 """Obtain requirements required to be present to upgrade a repo.
643
644 An upgrade will not be allowed if the repository doesn't have the
645 requirements returned by this function.
646 """
647 return {
648 # Introduced in Mercurial 0.9.2.
649 b'revlogv1',
650 # Introduced in Mercurial 0.9.2.
651 b'store',
652 }
653
654
655 def blocksourcerequirements(repo):
656 """Obtain requirements that will prevent an upgrade from occurring.
657
658 An upgrade cannot be performed if the source repository contains a
659 requirements in the returned set.
660 """
661 return {
662 # The upgrade code does not yet support these experimental features.
663 # This is an artificial limitation.
664 requirements.TREEMANIFEST_REQUIREMENT,
665 # This was a precursor to generaldelta and was never enabled by default.
666 # It should (hopefully) not exist in the wild.
667 b'parentdelta',
668 # Upgrade should operate on the actual store, not the shared link.
669 requirements.SHARED_REQUIREMENT,
670 }
671
672
670 def check_source_requirements(repo): 673 def check_source_requirements(repo):
671 """Ensure that no existing requirements prevent the repository upgrade""" 674 """Ensure that no existing requirements prevent the repository upgrade"""
672 675
673 required = requiredsourcerequirements(repo) 676 required = requiredsourcerequirements(repo)
674 missingreqs = required - repo.requirements 677 missingreqs = required - repo.requirements