view tests/test-clone-update-order.t @ 36975:795eb53f1d3e

rebase: allow in-memory merge of the working copy parent

Before this patch and when the rebase involved the working copy parent
(and thus the working copy too), we would not do in-memory rebase even
if requested to. The in-code comment explains that the reason had
something to do with avoiding an extra update, but I don't know which
update that refers to. Perhaps an earlier version of the code used to
update to the destination before rebasing even if in-memory rebase was
requested? That seems to not be done at least since aa660c1203a9
(rebase: do not bail on uncomitted changes if rebasing in-memory,
2017-12-07).

To see if this still made it slower, I create a single tiny commit on
top of one branch of the mozilla-unified repo (commit a1098c82 to be
exact) and rebased it to another branch (commit d4e9a7be). Before this
patch that took 11.8s and after this patch it took 8.6s (I only did
two runs each, but the timings were very consistent).

Differential Revision: https://phab.mercurial-scm.org/D2876

  $ hg init
  $ echo foo > bar
  $ hg commit -Am default
  adding bar
  $ hg up -r null
  0 files updated, 0 files merged, 1 files removed, 0 files unresolved
  $ hg branch mine
  marked working directory as branch mine
  (branches are permanent and global, did you want a bookmark?)
  $ echo hello > world
  $ hg commit -Am hello
  adding world
  $ hg up -r null
  0 files updated, 0 files merged, 1 files removed, 0 files unresolved
  $ hg branch other
  marked working directory as branch other
  $ echo good > bye
  $ hg commit -Am other
  adding bye
  $ hg up -r mine
  1 files updated, 0 files merged, 1 files removed, 0 files unresolved

  $ hg clone -U -u . .#other ../b -r 0 -r 1 -r 2 -b other
  abort: cannot specify both --noupdate and --updaterev
  [255]

  $ hg clone -U .#other ../b -r 0 -r 1 -r 2 -b other
  adding changesets
  adding manifests
  adding file changes
  added 3 changesets with 3 changes to 3 files (+2 heads)
  new changesets 8c68ee086fd0:fcc393352796
  $ rm -rf ../b

  $ hg clone -u . .#other ../b -r 0 -r 1 -r 2 -b other
  adding changesets
  adding manifests
  adding file changes
  added 3 changesets with 3 changes to 3 files (+2 heads)
  new changesets 8c68ee086fd0:fcc393352796
  updating to branch mine
  1 files updated, 0 files merged, 0 files removed, 0 files unresolved
  $ rm -rf ../b

  $ hg clone -u 0 .#other ../b -r 0 -r 1 -r 2 -b other
  adding changesets
  adding manifests
  adding file changes
  added 3 changesets with 3 changes to 3 files (+2 heads)
  new changesets 8c68ee086fd0:fcc393352796
  updating to branch default
  1 files updated, 0 files merged, 0 files removed, 0 files unresolved
  $ rm -rf ../b

  $ hg clone -u 1 .#other ../b -r 0 -r 1 -r 2 -b other
  adding changesets
  adding manifests
  adding file changes
  added 3 changesets with 3 changes to 3 files (+2 heads)
  new changesets 8c68ee086fd0:fcc393352796
  updating to branch mine
  1 files updated, 0 files merged, 0 files removed, 0 files unresolved
  $ rm -rf ../b

  $ hg clone -u 2 .#other ../b -r 0 -r 1 -r 2 -b other
  adding changesets
  adding manifests
  adding file changes
  added 3 changesets with 3 changes to 3 files (+2 heads)
  new changesets 8c68ee086fd0:fcc393352796
  updating to branch other
  1 files updated, 0 files merged, 0 files removed, 0 files unresolved
  $ rm -rf ../b

Test -r mine ... mine is ignored:

  $ hg clone -u 2 .#other ../b -r mine -r 0 -r 1 -r 2 -b other
  adding changesets
  adding manifests
  adding file changes
  added 3 changesets with 3 changes to 3 files (+2 heads)
  new changesets 8c68ee086fd0:fcc393352796
  updating to branch other
  1 files updated, 0 files merged, 0 files removed, 0 files unresolved
  $ rm -rf ../b

  $ hg clone .#other ../b -b default -b mine
  adding changesets
  adding manifests
  adding file changes
  added 3 changesets with 3 changes to 3 files (+2 heads)
  new changesets 8c68ee086fd0:fcc393352796
  updating to branch default
  1 files updated, 0 files merged, 0 files removed, 0 files unresolved
  $ rm -rf ../b

  $ hg clone .#other ../b
  adding changesets
  adding manifests
  adding file changes
  added 1 changesets with 1 changes to 1 files
  new changesets fcc393352796
  updating to branch other
  1 files updated, 0 files merged, 0 files removed, 0 files unresolved
  $ rm -rf ../b

  $ hg clone -U . ../c -r 1 -r 2 > /dev/null
  $ hg clone ../c ../b
  updating to branch other
  1 files updated, 0 files merged, 0 files removed, 0 files unresolved
  $ rm -rf ../b ../c