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largefiles: pay attention to dropped standin files when updating largefiles Previously, the largefile for a dropped standin would be deleted here, and then restored from the cache. This had the effect of clobbering uncommitted changes if a revert caused the file to be forgotten, which is not what happens with a normal file. Now the removal and update is skipped for dropped largefiles, and the corresponding standin is deleted from disk. This was noticed when working on issue5738 because the forgotten standin files were left behind, and that changes the behavior of the next rename to that directory. My first attempt was to cleanup the standins before calling this. That failed, because this function deletes the largefile if the corresponding standin is missing. This function is called by the revert command, merge (and therefore update), and patch, via the scmutil.marktouched() override. So it should be pretty narrow in scope. I didn't mark issue5738 as fixed because the move related issues can still happen if the main tree and the .hglf subtree get out of sync somehow. I don't see an easy fix for that, but that should be an edge case. If whoever queues this thinks it is good enough to close out the bug and can cram it into the summary, go for it.
author Matt Harbison <matt_harbison@yahoo.com>
date Sun, 12 Nov 2017 23:45:14 -0500
parents 1f5bd3e1a7fe
children 8e72f9152c4d
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Create a repository:

  $ hg config
  devel.all-warnings=true
  devel.default-date=0 0
  extensions.fsmonitor= (fsmonitor !)
  largefiles.usercache=$TESTTMP/.cache/largefiles (glob)
  ui.slash=True
  ui.interactive=False
  ui.mergemarkers=detailed
  ui.promptecho=True
  web.address=localhost
  web\.ipv6=(?:True|False) (re)
  $ hg init t
  $ cd t

Prepare a changeset:

  $ echo a > a
  $ hg add a

  $ hg status
  A a

Writes to stdio succeed and fail appropriately

#if devfull
  $ hg status 2>/dev/full
  A a

  $ hg status >/dev/full
  abort: No space left on device
  [255]
#endif

#if devfull no-chg
  $ hg status >/dev/full 2>&1
  [1]

  $ hg status ENOENT 2>/dev/full
  [1]
#endif

#if devfull chg
  $ hg status >/dev/full 2>&1
  [255]

  $ hg status ENOENT 2>/dev/full
  [255]
#endif

  $ hg commit -m test

This command is ancient:

  $ hg history
  changeset:   0:acb14030fe0a
  tag:         tip
  user:        test
  date:        Thu Jan 01 00:00:00 1970 +0000
  summary:     test
  

Verify that updating to revision 0 via commands.update() works properly

  $ cat <<EOF > update_to_rev0.py
  > from mercurial import ui, hg, commands
  > myui = ui.ui.load()
  > repo = hg.repository(myui, path='.')
  > commands.update(myui, repo, rev=0)
  > EOF
  $ hg up null
  0 files updated, 0 files merged, 1 files removed, 0 files unresolved
  $ $PYTHON ./update_to_rev0.py
  1 files updated, 0 files merged, 0 files removed, 0 files unresolved
  $ hg identify -n
  0


Poke around at hashes:

  $ hg manifest --debug
  b789fdd96dc2f3bd229c1dd8eedf0fc60e2b68e3 644   a

  $ hg cat a
  a

Verify should succeed:

  $ hg verify
  checking changesets
  checking manifests
  crosschecking files in changesets and manifests
  checking files
  1 files, 1 changesets, 1 total revisions

At the end...

  $ cd ..