view tests/test-dirstate.t @ 40391:abbd077965c0

wireprotov2: support exposing linknode of file revisions

When supporting shallow file storage, clients may fetch file revisions
by changeset. But they may not readily know which changeset introduced a
specific file revision. The "linknode" is used to record which changeset
introduces which file revision.

This commit teaches the "filedata" and "filesdata" wire protocol commands
to expose the linknode for file revisions. The implementation is likely
wrong when hidden changesets are in play, since the linknode may refer to
a hidden changeset. We can deal with this problem later.

Differential Revision: https://phab.mercurial-scm.org/D5167

------ Test dirstate._dirs refcounting

  $ hg init t
  $ cd t
  $ mkdir -p a/b/c/d
  $ touch a/b/c/d/x
  $ touch a/b/c/d/y
  $ touch a/b/c/d/z
  $ hg ci -Am m
  adding a/b/c/d/x
  adding a/b/c/d/y
  adding a/b/c/d/z
  $ hg mv a z
  moving a/b/c/d/x to z/b/c/d/x
  moving a/b/c/d/y to z/b/c/d/y
  moving a/b/c/d/z to z/b/c/d/z

Test name collisions

  $ rm z/b/c/d/x
  $ mkdir z/b/c/d/x
  $ touch z/b/c/d/x/y
  $ hg add z/b/c/d/x/y
  abort: file 'z/b/c/d/x' in dirstate clashes with 'z/b/c/d/x/y'
  [255]
  $ rm -rf z/b/c/d
  $ touch z/b/c/d
  $ hg add z/b/c/d
  abort: directory 'z/b/c/d' already in dirstate
  [255]

  $ cd ..

Issue1790: dirstate entry locked into unset if file mtime is set into
the future

Prepare test repo:

  $ hg init u
  $ cd u
  $ echo a > a
  $ hg add
  adding a
  $ hg ci -m1

Set mtime of a into the future:

  $ touch -t 202101011200 a

Status must not set a's entry to unset (issue1790):

  $ hg status
  $ hg debugstate
  n 644          2 2021-01-01 12:00:00 a

Test modulo storage/comparison of absurd dates:

#if no-aix
  $ touch -t 195001011200 a
  $ hg st
  $ hg debugstate
  n 644          2 2018-01-19 15:14:08 a
#endif

Verify that exceptions during a dirstate change leave the dirstate
coherent (issue4353)

  $ cat > ../dirstateexception.py <<EOF
  > from __future__ import absolute_import
  > from mercurial import (
  >   error,
  >   extensions,
  >   merge,
  > )
  > 
  > def wraprecordupdates(orig, repo, actions, branchmerge):
  >     raise error.Abort("simulated error while recording dirstateupdates")
  > 
  > def reposetup(ui, repo):
  >     extensions.wrapfunction(merge, 'recordupdates', wraprecordupdates)
  > EOF

  $ hg rm a
  $ hg commit -m 'rm a'
  $ echo "[extensions]" >> .hg/hgrc
  $ echo "dirstateex=../dirstateexception.py" >> .hg/hgrc
  $ hg up 0
  abort: simulated error while recording dirstateupdates
  [255]
  $ hg log -r . -T '{rev}\n'
  1
  $ hg status
  ? a