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clone: warn when streaming was requested but couldn't be performed...

clone: warn when streaming was requested but couldn't be performed This helps both users and the people who support them figure out why a stream clone couldn't be performed. In an upcoming patch we're going to add a way for servers to hard abort on a full getbundle. In those cases servers might expect clients to perform a stream clone, so it's important to communicate why one couldn't be done.

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        Pierre-Yves David
    
obsolescence: add test for the "branch replacement" logic during push, case D7...

              r32018
            
      ====================================

      Testing head checking code: Case D-7

      ====================================

      Mercurial checks for the introduction of new heads on push. Evolution comes

      into play to detect if existing branches on the server are being replaced by

      some of the new one we push.

      This case is part of a series of tests checking this behavior.

      Category D: remote head is "obs-affected" locally, but result is not part of the push

      TestCase 7: single changesets, superseeded multiple time then pruned (on a new changeset unpushed) changeset

      This is a partial push variation of B6

      .. old-state:

      ..

      .. * 1 changeset branch

      ..

      .. new-state:

      ..

      .. * old branch is rewritten onto another one,

      .. * The rewriting it again rewritten on the root

      .. * the new version is then pruned.

      ..

      .. expected-result:

      ..

      .. * push allowed

      ..

      .. graph-summary:

      ..

      ..       A'

      ..   A ø⇠ø⇠⊗ A''

      ..     | | |

      .. C ◔ | ◔ | B

      ..    \|/ /

      ..     | /

      ..     |/

      ..     |

      ..     ●

        $ . $TESTDIR/testlib/push-checkheads-util.sh

      Test setup

      ----------

        $ mkdir D7

        $ cd D7

        $ setuprepos

        creating basic server and client repo

        updating to branch default

        2 files updated, 0 files merged, 0 files removed, 0 files unresolved

        $ cd client

        $ hg up 0

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

        $ mkcommit B0

        created new head

        $ mkcommit A1

        $ hg up '0'

        0 files updated, 0 files merged, 2 files removed, 0 files unresolved

        $ mkcommit A2

        created new head

        $ hg up '0'

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

        $ mkcommit C0

        created new head

        $ hg debugobsolete `getid "desc(A0)"` `getid "desc(A1)"`

        $ hg debugobsolete `getid "desc(A1)"` `getid "desc(A2)"`

        $ hg debugobsolete --record-parents `getid "desc(A2)"`

        $ hg log -G --hidden

        @  0f88766e02d6 (draft): C0

        |

        | x  c1f8d089020f (draft): A2

        |/

        | x  ba93660aff8d (draft): A1

        | |

        | o  74ff5441d343 (draft): B0

        |/

        | x  8aaa48160adc (draft): A0

        |/

        o  1e4be0697311 (public): root

      Actual testing

      --------------

        $ hg push --rev 'desc(C0)'

        pushing to $TESTTMP/D7/server (glob)

        searching for changes

        adding changesets

        adding manifests

        adding file changes

        added 1 changesets with 1 changes to 1 files (+1 heads)

        3 new obsolescence markers

        $ cd ../..

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Pierre-Yves David obsolescence: add test for the "branch replacement" logic during push, case D7...	r32018	====================================
		Testing head checking code: Case D-7
		====================================

		Mercurial checks for the introduction of new heads on push. Evolution comes
		into play to detect if existing branches on the server are being replaced by
		some of the new one we push.

		This case is part of a series of tests checking this behavior.

		Category D: remote head is "obs-affected" locally, but result is not part of the push
		TestCase 7: single changesets, superseeded multiple time then pruned (on a new changeset unpushed) changeset

		This is a partial push variation of B6

		.. old-state:
		..
		.. * 1 changeset branch
		..
		.. new-state:
		..
		.. * old branch is rewritten onto another one,
		.. * The rewriting it again rewritten on the root
		.. * the new version is then pruned.
		..
		.. expected-result:
		..
		.. * push allowed
		..
		.. graph-summary:
		..
		.. A'
		.. A ø⇠ø⇠⊗ A''
		.. \| \| \|
		.. C ◔ \| ◔ \| B
		.. \\|/ /
		.. \| /
		.. \|/
		.. \|
		.. ●

		$ . $TESTDIR/testlib/push-checkheads-util.sh

		Test setup
		----------

		$ mkdir D7
		$ cd D7
		$ setuprepos
		creating basic server and client repo
		updating to branch default
		2 files updated, 0 files merged, 0 files removed, 0 files unresolved
		$ cd client
		$ hg up 0
		0 files updated, 0 files merged, 1 files removed, 0 files unresolved
		$ mkcommit B0
		created new head
		$ mkcommit A1
		$ hg up '0'
		0 files updated, 0 files merged, 2 files removed, 0 files unresolved
		$ mkcommit A2
		created new head
		$ hg up '0'
		0 files updated, 0 files merged, 1 files removed, 0 files unresolved
		$ mkcommit C0
		created new head
		$ hg debugobsolete `getid "desc(A0)"` `getid "desc(A1)"`
		$ hg debugobsolete `getid "desc(A1)"` `getid "desc(A2)"`
		$ hg debugobsolete --record-parents `getid "desc(A2)"`
		$ hg log -G --hidden
		@ 0f88766e02d6 (draft): C0
		\|
		\| x c1f8d089020f (draft): A2
		\|/
		\| x ba93660aff8d (draft): A1
		\| \|
		\| o 74ff5441d343 (draft): B0
		\|/
		\| x 8aaa48160adc (draft): A0
		\|/
		o 1e4be0697311 (public): root


		Actual testing
		--------------

		$ hg push --rev 'desc(C0)'
		pushing to $TESTTMP/D7/server (glob)
		searching for changes
		adding changesets
		adding manifests
		adding file changes
		added 1 changesets with 1 changes to 1 files (+1 heads)
		3 new obsolescence markers

		$ cd ../..