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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.

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      https://bz.mercurial-scm.org/1175

        $ hg init

        $ touch a

        $ hg ci -Am0

        adding a

        $ hg mv a a1

        $ hg ci -m1

        $ hg co 0

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

        $ hg mv a a2

        $ hg up

        note: possible conflict - a was renamed multiple times to:

         a2

         a1

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

        $ hg ci -m2

        $ touch a

        $ hg ci -Am3

        adding a

        $ hg mv a b

        $ hg ci -Am4 a

        $ hg ci --debug --traceback -Am5 b

        committing files:

        b

        warning: can't find ancestor for 'b' copied from 'a'!

        committing manifest

        committing changelog

        committed changeset 5:83a687e8a97c80992ba385bbfd766be181bfb1d1

        $ hg verify

        checking changesets

        checking manifests

        crosschecking files in changesets and manifests

        checking files

        4 files, 6 changesets, 4 total revisions

        $ hg export --git tip

        # HG changeset patch

        # User test

        # Date 0 0

        #      Thu Jan 01 00:00:00 1970 +0000

        # Node ID 83a687e8a97c80992ba385bbfd766be181bfb1d1

        # Parent  1d1625283f71954f21d14c3d44d0ad3c019c597f

        5

        diff --git a/b b/b

        new file mode 100644

      http://bz.selenic.com/show_bug.cgi?id=4476

        $ hg init foo

        $ cd foo

        $ touch a && hg ci -Aqm a

        $ hg mv a b

        $ echo b1 >> b

        $ hg ci -Aqm b1

        $ hg up 0

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

        $ hg mv a b

        $ echo b2 >> b

        $ hg ci -Aqm b2

        $ hg graft 1

        grafting 1:5974126fad84 "b1"

        merging b

        warning: conflicts while merging b! (edit, then use 'hg resolve --mark')

        abort: unresolved conflicts, can't continue

        (use hg resolve and hg graft --continue)

        [255]

        $ echo a > b

        $ echo b3 >> b

        $ hg resolve --mark b

        (no more unresolved files)

        continue: hg graft --continue

        $ hg graft --continue

        grafting 1:5974126fad84 "b1"

        warning: can't find ancestor for 'b' copied from 'a'!

        $ hg log -f b -T 'changeset:   {rev}:{node|short}\nsummary:     {desc}\n\n'

        changeset:   3:376d30ccffc0

        summary:     b1

        changeset:   2:416baaa2e5e4

        summary:     b2

        changeset:   0:3903775176ed

        summary:     a

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				https://bz.mercurial-scm.org/1175

				$ hg init
				$ touch a
				$ hg ci -Am0
				adding a

				$ hg mv a a1
				$ hg ci -m1

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

				$ hg mv a a2
				$ hg up
				note: possible conflict - a was renamed multiple times to:
				a2
				a1
				1 files updated, 0 files merged, 0 files removed, 0 files unresolved

				$ hg ci -m2

				$ touch a
				$ hg ci -Am3
				adding a

				$ hg mv a b
				$ hg ci -Am4 a

				$ hg ci --debug --traceback -Am5 b
				committing files:
				b
				warning: can't find ancestor for 'b' copied from 'a'!
				committing manifest
				committing changelog
				committed changeset 5:83a687e8a97c80992ba385bbfd766be181bfb1d1

				$ hg verify
				checking changesets
				checking manifests
				crosschecking files in changesets and manifests
				checking files
				4 files, 6 changesets, 4 total revisions

				$ hg export --git tip
				# HG changeset patch
				# User test
				# Date 0 0
				# Thu Jan 01 00:00:00 1970 +0000
				# Node ID 83a687e8a97c80992ba385bbfd766be181bfb1d1
				# Parent 1d1625283f71954f21d14c3d44d0ad3c019c597f
				5

				diff --git a/b b/b
				new file mode 100644

				http://bz.selenic.com/show_bug.cgi?id=4476

				$ hg init foo
				$ cd foo
				$ touch a && hg ci -Aqm a
				$ hg mv a b
				$ echo b1 >> b
				$ hg ci -Aqm b1
				$ hg up 0
				1 files updated, 0 files merged, 1 files removed, 0 files unresolved
				$ hg mv a b
				$ echo b2 >> b
				$ hg ci -Aqm b2
				$ hg graft 1
				grafting 1:5974126fad84 "b1"
				merging b
				warning: conflicts while merging b! (edit, then use 'hg resolve --mark')
				abort: unresolved conflicts, can't continue
				(use hg resolve and hg graft --continue)
				[255]
				$ echo a > b
				$ echo b3 >> b
				$ hg resolve --mark b
				(no more unresolved files)
				continue: hg graft --continue
				$ hg graft --continue
				grafting 1:5974126fad84 "b1"
				warning: can't find ancestor for 'b' copied from 'a'!
				$ hg log -f b -T 'changeset: {rev}:{node\|short}\nsummary: {desc}\n\n'
				changeset: 3:376d30ccffc0
				summary: b1

				changeset: 2:416baaa2e5e4
				summary: b2

				changeset: 0:3903775176ed
				summary: a