tests/test-remotefilelog-log.t

discovery: fix docstring of `outgoing` class

Also, introduce a more correct name `ancestorsof` for what was named
`missingheads` before. For now, we just forward `ancestorsof` to `missingheads`
until all users are changed.

There were some mistakes in the old docstring / name:

* `missingheads` (new name: `ancestorsof`) contains the revs whose ancestors
  are included in the outgoing operation. It may contain non-head revs and revs
  which are already on the remote, so the name "missingheads" is wrong in two
  ways.
* `missing` contains only ancestors of `missingheads`, so not *all nodes*
  present in local but not in remote.
* `common` might not contain all common revs, e.g. not some that are not an
  ancestor of `missingheads`.

It seems like the misleading name have fostered an actual bug (issue6372),
where `outgoing.missingheads` was used assuming that it contains the heads of
the missing changesets.

#require no-windows

  $ . "$TESTDIR/remotefilelog-library.sh"

  $ hg init master
  $ cd master
  $ cat >> .hg/hgrc <<EOF
  > [remotefilelog]
  > server=True
  > EOF
  $ echo x > x
  $ hg commit -qAm x
  $ mkdir dir
  $ echo y > dir/y
  $ hg commit -qAm y

  $ cd ..

Shallow clone from full

  $ hgcloneshallow ssh://user@dummy/master shallow --noupdate
  streaming all changes
  2 files to transfer, 473 bytes of data
  transferred 473 bytes in * seconds (*/sec) (glob)
  searching for changes
  no changes found
  $ cd shallow
  $ cat .hg/requires
  dotencode
  exp-remotefilelog-repo-req-1
  fncache
  generaldelta
  revlogv1
  sparserevlog
  store

  $ hg update
  2 files updated, 0 files merged, 0 files removed, 0 files unresolved
  2 files fetched over 1 fetches - (2 misses, 0.00% hit ratio) over *s (glob)

Log on a file without -f

  $ hg log dir/y
  warning: file log can be slow on large repos - use -f to speed it up
  changeset:   1:2e73264fab97
  tag:         tip
  user:        test
  date:        Thu Jan 01 00:00:00 1970 +0000
  summary:     y
  
Log on a file with -f

  $ hg log -f dir/y
  changeset:   1:2e73264fab97
  tag:         tip
  user:        test
  date:        Thu Jan 01 00:00:00 1970 +0000
  summary:     y
  
Log on a file with kind in path
  $ hg log -r "filelog('path:dir/y')"
  changeset:   1:2e73264fab97
  tag:         tip
  user:        test
  date:        Thu Jan 01 00:00:00 1970 +0000
  summary:     y
  
Log on multiple files with -f

  $ hg log -f dir/y x
  changeset:   1:2e73264fab97
  tag:         tip
  user:        test
  date:        Thu Jan 01 00:00:00 1970 +0000
  summary:     y
  
  changeset:   0:b292c1e3311f
  user:        test
  date:        Thu Jan 01 00:00:00 1970 +0000
  summary:     x
  
Log on a directory

  $ hg log dir
  changeset:   1:2e73264fab97
  tag:         tip
  user:        test
  date:        Thu Jan 01 00:00:00 1970 +0000
  summary:     y
  
Log on a file from inside a directory

  $ cd dir
  $ hg log y
  warning: file log can be slow on large repos - use -f to speed it up
  changeset:   1:2e73264fab97
  tag:         tip
  user:        test
  date:        Thu Jan 01 00:00:00 1970 +0000
  summary:     y
  
Log on a file via -fr
  $ cd ..
  $ hg log -fr tip dir/ --template '{rev}\n'
  1

Trace renames
  $ hg mv x z
  $ hg commit -m move
  $ hg log -f z -T '{desc} {file_copies}\n' -G
  @  move z (x)
  :
  o  x
  

Verify remotefilelog handles rename metadata stripping when comparing file sizes
  $ hg debugrebuilddirstate
  $ hg status