view tests/test-remotefilelog-share.t @ 42230:fdbeacb9d456

copies: filter out copies from non-existent source later in _chain()

_changesetforwardcopies() repeatedly calls _chain(). That is very
expensive because _chain() does lookups in the manifest. I hope to
split up the function in two parts: 1) simple chaining, not
considering end points, and 2) filter out files that don't exist in
the end points (and ping-pong copies/renames).

This patches gets us closer to that by moving the check for
non-existent source later in the function. Now there are no more
checks for "src" and "dst" in the first loop; all the filtering of
invalid copies is done in the second loop. The code also looks much
more consistent now.

No measureable impact on `hg debugpathcopies 4.0 4.8`. That shouldn't
be surprising since the only case we're doing more checks now is in
case of chained copies/renames, which are quire rare in practice.

Differential Revision: https://phab.mercurial-scm.org/D6277

#require no-windows

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

  $ cat >> $HGRCPATH <<EOF
  > [extensions]
  > remotefilelog=
  > share=
  > EOF

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

  $ cd ..


  $ hgcloneshallow ssh://user@dummy/master source --noupdate -q
  $ hg share source dest
  updating working directory
  1 files updated, 0 files merged, 0 files removed, 0 files unresolved
  $ hg -R dest unshare