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strip: incrementally update the branchheads cache after a strip...

strip: incrementally update the branchheads cache after a strip This function augments strip to incrementally update the branchheads cache rather than recompute it from scratch. This speeds up the performance of strip and rebase on repos with long history. The performance optimization only happens if the revisions stripped are all on the same branch and the parents of the stripped revisions are also on that same branch. This adds a few test cases, particularly one that reproduces the extra heads that mpm observed.

Dan Villiom Podlaski Christiansen - - Load All Authors

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      http://mercurial.selenic.com/bts/issue1175

        $ 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

        b

         b: searching for copy revision for a

         b: copy a:b80de5d138758541c5f05265ad144ab9fa86d1db

        committed changeset 5:89e8e4be0de296fa3d6dd7825ccc44d7dc0f1f3b

        $ 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

        # Node ID 89e8e4be0de296fa3d6dd7825ccc44d7dc0f1f3b

        # Parent  7fc86ba705e717a721dbc361bf8c9bc05a18ca2f

        5

        diff --git a/b b/b

        new file mode 100644

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				http://mercurial.selenic.com/bts/issue1175

				$ 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
				b
				b: searching for copy revision for a
				b: copy a:b80de5d138758541c5f05265ad144ab9fa86d1db
				committed changeset 5:89e8e4be0de296fa3d6dd7825ccc44d7dc0f1f3b

				$ 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
				# Node ID 89e8e4be0de296fa3d6dd7825ccc44d7dc0f1f3b
				# Parent 7fc86ba705e717a721dbc361bf8c9bc05a18ca2f
				5

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