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changegroup: don't support versions 01 and 02 with treemanifests...

changegroup: don't support versions 01 and 02 with treemanifests Since it would be terribly expensive to convert between flat manifests and treemanifests, we have decided to simply not support changegroup version 01 and 02 with treemanifests. Therefore, let's stop announcing that we support these versions on treemanifest repos. Note that this means that older clients that try to clone from a treemanifest repo will fail. What happens is that the server, after this patch, finds that there are no common versions and raises "ValueError: no common changegroup version". This results in "abort: HTTP Error 500: Internal Server Error" on the client. Before this patch, it was no better: The server would instead find that there were directory manifest nodes to put in the changegroup 01 or 02 and raise an AssertionError on changegroup.py#668 (assert not tmfnodes), which would also appear as a 500 to the client.

Siddharth Agarwal - - Load All Authors

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      https://bz.mercurial-scm.org/672

      # 0-2-4

      #  \ \ \

      #   1-3-5

      #

      # rename in #1, content change in #4.

        $ hg init

        $ touch 1

        $ touch 2

        $ hg commit -Am init  # 0

        adding 1

        adding 2

        $ hg rename 1 1a

        $ hg commit -m rename # 1

        $ hg co -C 0

        1 files updated, 0 files merged, 1 files removed, 0 files unresolved

        $ echo unrelated >> 2

        $ hg ci -m unrelated1 # 2

        created new head

        $ hg merge --debug 1

          searching for copies back to rev 1

          unmatched files in other:

           1a

          all copies found (* = to merge, ! = divergent, % = renamed and deleted):

           src: '1' -> dst: '1a' 

          checking for directory renames

        resolving manifests

         branchmerge: True, force: False, partial: False

         ancestor: 81f4b099af3d, local: c64f439569a9+, remote: c12dcd37c90a

         1: other deleted -> r

        removing 1

         1a: remote created -> g

        getting 1a

         2: remote unchanged -> k

        1 files updated, 0 files merged, 1 files removed, 0 files unresolved

        (branch merge, don't forget to commit)

        $ hg ci -m merge1 # 3

        $ hg co -C 2

        1 files updated, 0 files merged, 1 files removed, 0 files unresolved

        $ echo hello >> 1

        $ hg ci -m unrelated2 # 4

        created new head

        $ hg co -C 3

        1 files updated, 0 files merged, 1 files removed, 0 files unresolved

        $ hg merge -y --debug 4

          searching for copies back to rev 1

          unmatched files in local:

           1a

          all copies found (* = to merge, ! = divergent, % = renamed and deleted):

           src: '1' -> dst: '1a' *

          checking for directory renames

        resolving manifests

         branchmerge: True, force: False, partial: False

         ancestor: c64f439569a9, local: e327dca35ac8+, remote: 746e9549ea96

         preserving 1a for resolve of 1a

         1a: local copied/moved from 1 -> m (premerge)

        picked tool ':merge' for 1a (binary False symlink False changedelete False)

        merging 1a and 1 to 1a

        my 1a@e327dca35ac8+ other 1@746e9549ea96 ancestor 1@81f4b099af3d

         premerge successful

        0 files updated, 1 files merged, 0 files removed, 0 files unresolved

        (branch merge, don't forget to commit)

        $ hg co -C 4

        1 files updated, 0 files merged, 1 files removed, 0 files unresolved

        $ hg merge -y --debug 3

          searching for copies back to rev 1

          unmatched files in other:

           1a

          all copies found (* = to merge, ! = divergent, % = renamed and deleted):

           src: '1' -> dst: '1a' *

          checking for directory renames

        resolving manifests

         branchmerge: True, force: False, partial: False

         ancestor: c64f439569a9, local: 746e9549ea96+, remote: e327dca35ac8

         preserving 1 for resolve of 1a

        removing 1

         1a: remote moved from 1 -> m (premerge)

        picked tool ':merge' for 1a (binary False symlink False changedelete False)

        merging 1 and 1a to 1a

        my 1a@746e9549ea96+ other 1a@e327dca35ac8 ancestor 1@81f4b099af3d

         premerge successful

        0 files updated, 1 files merged, 0 files removed, 0 files unresolved

        (branch merge, don't forget to commit)

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				https://bz.mercurial-scm.org/672

				# 0-2-4
				# \ \ \
				# 1-3-5
				#
				# rename in #1, content change in #4.

				$ hg init

				$ touch 1
				$ touch 2
				$ hg commit -Am init # 0
				adding 1
				adding 2

				$ hg rename 1 1a
				$ hg commit -m rename # 1

				$ hg co -C 0
				1 files updated, 0 files merged, 1 files removed, 0 files unresolved

				$ echo unrelated >> 2
				$ hg ci -m unrelated1 # 2
				created new head

				$ hg merge --debug 1
				searching for copies back to rev 1
				unmatched files in other:
				1a
				all copies found (* = to merge, ! = divergent, % = renamed and deleted):
				src: '1' -> dst: '1a'
				checking for directory renames
				resolving manifests
				branchmerge: True, force: False, partial: False
				ancestor: 81f4b099af3d, local: c64f439569a9+, remote: c12dcd37c90a
				1: other deleted -> r
				removing 1
				1a: remote created -> g
				getting 1a
				2: remote unchanged -> k
				1 files updated, 0 files merged, 1 files removed, 0 files unresolved
				(branch merge, don't forget to commit)

				$ hg ci -m merge1 # 3

				$ hg co -C 2
				1 files updated, 0 files merged, 1 files removed, 0 files unresolved

				$ echo hello >> 1
				$ hg ci -m unrelated2 # 4
				created new head

				$ hg co -C 3
				1 files updated, 0 files merged, 1 files removed, 0 files unresolved

				$ hg merge -y --debug 4
				searching for copies back to rev 1
				unmatched files in local:
				1a
				all copies found (* = to merge, ! = divergent, % = renamed and deleted):
				src: '1' -> dst: '1a' *
				checking for directory renames
				resolving manifests
				branchmerge: True, force: False, partial: False
				ancestor: c64f439569a9, local: e327dca35ac8+, remote: 746e9549ea96
				preserving 1a for resolve of 1a
				1a: local copied/moved from 1 -> m (premerge)
				picked tool ':merge' for 1a (binary False symlink False changedelete False)
				merging 1a and 1 to 1a
				my 1a@e327dca35ac8+ other 1@746e9549ea96 ancestor 1@81f4b099af3d
				premerge successful
				0 files updated, 1 files merged, 0 files removed, 0 files unresolved
				(branch merge, don't forget to commit)

				$ hg co -C 4
				1 files updated, 0 files merged, 1 files removed, 0 files unresolved

				$ hg merge -y --debug 3
				searching for copies back to rev 1
				unmatched files in other:
				1a
				all copies found (* = to merge, ! = divergent, % = renamed and deleted):
				src: '1' -> dst: '1a' *
				checking for directory renames
				resolving manifests
				branchmerge: True, force: False, partial: False
				ancestor: c64f439569a9, local: 746e9549ea96+, remote: e327dca35ac8
				preserving 1 for resolve of 1a
				removing 1
				1a: remote moved from 1 -> m (premerge)
				picked tool ':merge' for 1a (binary False symlink False changedelete False)
				merging 1 and 1a to 1a
				my 1a@746e9549ea96+ other 1a@e327dca35ac8 ancestor 1@81f4b099af3d
				premerge successful
				0 files updated, 1 files merged, 0 files removed, 0 files unresolved
				(branch merge, don't forget to commit)