tests/test-empty.t

clone: reuse the stream clone logic for local clone

Streaming clone and local (non `--pull`) clone do mostly the same thing,
however they were using different logic to do so. This means the logic
frequently went out of sync and that new case had to be dealt with twice.

This is fragile and anoying. So we replace this with a re-use of the logic we
use for streaming clone.

I can see various test changes:

- a more precise progress output,
- armless fncache loading during clone,
- fncache is no longer hardlinked (since we write it by hand).

I am not reinstalling the `reposimplestore` specific output, as far as I
understand this variant have been broken for years.

Differential Revision: https://phab.mercurial-scm.org/D10855

Create an empty repo:

  $ hg init a
  $ cd a

Try some commands:

  $ hg log
  $ hg grep wah
  [1]
  $ hg manifest
  $ hg verify
  checking changesets
  checking manifests
  crosschecking files in changesets and manifests
  checking files
  checked 0 changesets with 0 changes to 0 files

Check the basic files created:

  $ ls .hg
  00changelog.i
  cache
  requires
  store
  wcache

Should be empty:

  $ ls .hg/store

Poke at a clone:

  $ cd ..
  $ hg clone a b
  updating to branch default
  0 files updated, 0 files merged, 0 files removed, 0 files unresolved
  $ cd b
  $ hg verify
  checking changesets
  checking manifests
  crosschecking files in changesets and manifests
  checking files
  checked 0 changesets with 0 changes to 0 files
  $ ls .hg
  00changelog.i
  cache
  dirstate
  hgrc
  requires
  store
  wcache

Should be empty:

  $ ls .hg/store

  $ cd ..