view tests/test-issue612.t @ 29408:785cadec2091

revset: make head() honor order of subset

The ordering of 'x & head()' was broken in 6a1a4c212d50 (revset:
improve head revset performance, 2014-03-13). Presumably due to other
optimizations since then, undoing that change to fix the order does
not slow down the simple case of "hg log -r 'head()'" mentioned in
that commit. I see a small slowdown from ~0.16s to about ~0.19s with
'not 0 & head()', but I'd say it's worth it for the correct output.

https://bz.mercurial-scm.org/612

  $ hg init
  $ mkdir src
  $ echo a > src/a.c
  $ hg ci -Ama
  adding src/a.c

  $ hg mv src source
  moving src/a.c to source/a.c (glob)

  $ hg ci -Ammove

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

  $ echo new > src/a.c
  $ echo compiled > src/a.o
  $ hg ci -mupdate
  created new head

  $ hg status
  ? src/a.o

  $ hg merge
  merging src/a.c and source/a.c to source/a.c
  0 files updated, 1 files merged, 0 files removed, 0 files unresolved
  (branch merge, don't forget to commit)

  $ hg status
  M source/a.c
  R src/a.c
  ? src/a.o