tests/test-locate.t

rust-re2: add wrapper for calling Re2 from Rust

This assumes that Re2 is installed following Google's guide. I am not sure
how we want to integrate it in the project, but I think a follow-up patch would
be more appropriate for such work.
As it stands, *not* having Re2 installed results in a compilation error, which
is a problem as it breaks install compatibility. Hence, this is gated behind
a non-default `with-re2` compilation feature.

Differential Revision: https://phab.mercurial-scm.org/D7910

  $ hg init repo
  $ cd repo
  $ echo 0 > a
  $ echo 0 > b
  $ echo 0 > t.h
  $ mkdir t
  $ echo 0 > t/x
  $ echo 0 > t/b
  $ echo 0 > t/e.h
  $ mkdir dir.h
  $ echo 0 > dir.h/foo

  $ hg ci -A -m m
  adding a
  adding b
  adding dir.h/foo
  adding t.h
  adding t/b
  adding t/e.h
  adding t/x

  $ touch nottracked

  $ hg locate a
  a

  $ hg locate NONEXISTENT
  [1]

  $ hg locate
  a
  b
  dir.h/foo
  t.h
  t/b
  t/e.h
  t/x

  $ hg rm a
  $ hg ci -m m

  $ hg locate a
  [1]
  $ hg locate NONEXISTENT
  [1]
  $ hg locate relpath:NONEXISTENT
  [1]
  $ hg locate
  b
  dir.h/foo
  t.h
  t/b
  t/e.h
  t/x
  $ hg locate -r 0 a
  a
  $ hg locate -r 0 NONEXISTENT
  [1]
  $ hg locate -r 0 relpath:NONEXISTENT
  [1]
  $ hg locate -r 0
  a
  b
  dir.h/foo
  t.h
  t/b
  t/e.h
  t/x

-I/-X with relative path should work:

  $ cd t
  $ hg locate
  b
  dir.h/foo
  t.h
  t/b
  t/e.h
  t/x
  $ hg locate -I ../t
  t/b
  t/e.h
  t/x

Issue294: hg remove --after dir fails when dir.* also exists

  $ cd ..
  $ rm -r t

  $ hg rm t/b

  $ hg locate 't/**'
  t/b
  t/e.h
  t/x

  $ hg files
  b
  dir.h/foo
  t.h
  t/e.h
  t/x
  $ hg files b
  b

-X with explicit path:

  $ hg files b -X b
  [1]

  $ mkdir otherdir
  $ cd otherdir

  $ hg files path:
  ../b
  ../dir.h/foo
  ../t.h
  ../t/e.h
  ../t/x
  $ hg files path:.
  ../b
  ../dir.h/foo
  ../t.h
  ../t/e.h
  ../t/x
  $ hg files --config ui.relative-paths=yes
  ../b
  ../dir.h/foo
  ../t.h
  ../t/e.h
  ../t/x
  $ hg files --config ui.relative-paths=no
  b
  dir.h/foo
  t.h
  t/e.h
  t/x
  $ hg files --config ui.relative-paths=legacy
  ../b
  ../dir.h/foo
  ../t.h
  ../t/e.h
  ../t/x

  $ hg locate b
  ../b
  ../t/b
  $ hg locate '*.h'
  ../t.h
  ../t/e.h
  $ hg locate path:t/x
  ../t/x
  $ hg locate 're:.*\.h$'
  ../t.h
  ../t/e.h
  $ hg locate -r 0 b
  ../b
  ../t/b
  $ hg locate -r 0 '*.h'
  ../t.h
  ../t/e.h
  $ hg locate -r 0 path:t/x
  ../t/x
  $ hg locate -r 0 're:.*\.h$'
  ../t.h
  ../t/e.h

  $ hg files
  ../b
  ../dir.h/foo
  ../t.h
  ../t/e.h
  ../t/x
  $ hg files .
  [1]

Fileset at null (i.e. a falsy context) shouldn't crash (issue6046)

  $ hg files -r null 'set:tracked()'
  [1]

Convert native path separator to slash (issue5572)

  $ hg files -T '{path|relpath|slashpath}\n'
  ../b
  ../dir.h/foo
  ../t.h
  ../t/e.h
  ../t/x

  $ cd ../..