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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.

Thomas Arendsen Hein - - Load All Authors

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      http://mercurial.selenic.com/bts/issue672

      # 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):

           1a -> 1 

          checking for directory renames

        resolving manifests

         overwrite: False, partial: False

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

         1: other deleted -> r

         1a: remote created -> g

        updating: 1 1/2 files (50.00%)

        removing 1

        updating: 1a 2/2 files (100.00%)

        getting 1a

        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):

           1a -> 1 *

          checking for directory renames

        resolving manifests

         overwrite: False, partial: False

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

         1a: local copied/moved to 1 -> m

        preserving 1a for resolve of 1a

        updating: 1a 1/1 files (100.00%)

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

           1a -> 1 *

          checking for directory renames

        resolving manifests

         overwrite: False, partial: False

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

         1: remote moved to 1a -> m

        preserving 1 for resolve of 1a

        removing 1

        updating: 1 1/1 files (100.00%)

        picked tool 'internal:merge' for 1a (binary False symlink 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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				http://mercurial.selenic.com/bts/issue672

				# 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):
				1a -> 1
				checking for directory renames
				resolving manifests
				overwrite: False, partial: False
				ancestor: 81f4b099af3d, local: c64f439569a9+, remote: c12dcd37c90a
				1: other deleted -> r
				1a: remote created -> g
				updating: 1 1/2 files (50.00%)
				removing 1
				updating: 1a 2/2 files (100.00%)
				getting 1a
				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):
				1a -> 1 *
				checking for directory renames
				resolving manifests
				overwrite: False, partial: False
				ancestor: c64f439569a9, local: e327dca35ac8+, remote: 746e9549ea96
				1a: local copied/moved to 1 -> m
				preserving 1a for resolve of 1a
				updating: 1a 1/1 files (100.00%)
				picked tool 'internal:merge' for 1a (binary False symlink 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):
				1a -> 1 *
				checking for directory renames
				resolving manifests
				overwrite: False, partial: False
				ancestor: c64f439569a9, local: 746e9549ea96+, remote: e327dca35ac8
				1: remote moved to 1a -> m
				preserving 1 for resolve of 1a
				removing 1
				updating: 1 1/1 files (100.00%)
				picked tool 'internal:merge' for 1a (binary False symlink 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)