comparison tests/test-strip.t @ 29593:953839de96ab

bundle2: store changeset count when creating file bundles

The bundle2 changegroup part has an advisory param saying how many
changesets are in the part. Before this patch, we were setting
this part when generating bundle2 parts via the wire protocol but
not when generating local bundle2 files.

A side effect of not setting the changeset count part is that progress
bars don't work when applying changesets. As the tests show, this
impacted clone bundles, shelve, backup bundles, `hg unbundle`, and
anything touching bundle2 files.

This patch adds a backdoor to allow us to pass state from
changegroup generation into the unbundler. We store the number
of changesets in the changegroup in this state and use it to
populate the aforementioned advisory part parameter when generating
the bundle2 bundle.

I concede that I'm not thrilled by how state is being passed in
changegroup.py (it feels a bit hacky). I would love to overhaul the
rather confusing set of functions in changegroup.py with something that
passes rich objects around instead of e.g. low-level generators.
However, given the code freeze for 3.9 is imminent, I'd rather not
undertake this endeavor right now. This feels like the easiest way
to get the parameter added to the changegroup part.

29592:37cccad55410

  date:        Thu Jan 01 00:00:00 1970 +0000
  summary:     b
  
  $ hg debugbundle .hg/strip-backup/*
  Stream params: sortdict([('Compression', 'BZ')])
  changegroup -- "sortdict([('version', '02')])"
      264128213d290d868c54642d13aeaa3675551a78
  $ hg pull .hg/strip-backup/*
  pulling from .hg/strip-backup/264128213d29-0b39d6bf-backup.hg
  searching for changes
  adding changesets

  2 changesets found
  list of changesets:
  6625a516847449b6f0fa3737b9ba56e9f0f3032c
  d8db9d1372214336d2b5570f20ee468d2c72fa8b
  bundle2-output-bundle: "HG20", (1 params) 1 parts total
  bundle2-output-part: "changegroup" (params: 1 mandatory) streamed payload
  saved backup bundle to $TESTTMP/issue4736/.hg/strip-backup/6625a5168474-345bb43d-backup.hg (glob)
  invalid branchheads cache (served): tip differs
  truncating cache/rbc-revs-v1 to 24
  $ hg log -G
  o  changeset:   2:5c51d8d6557d

29593:953839de96ab

  date:        Thu Jan 01 00:00:00 1970 +0000
  summary:     b
  
  $ hg debugbundle .hg/strip-backup/*
  Stream params: sortdict([('Compression', 'BZ')])
  changegroup -- "sortdict([('version', '02'), ('nbchanges', '1')])"
      264128213d290d868c54642d13aeaa3675551a78
  $ hg pull .hg/strip-backup/*
  pulling from .hg/strip-backup/264128213d29-0b39d6bf-backup.hg
  searching for changes
  adding changesets

  2 changesets found
  list of changesets:
  6625a516847449b6f0fa3737b9ba56e9f0f3032c
  d8db9d1372214336d2b5570f20ee468d2c72fa8b
  bundle2-output-bundle: "HG20", (1 params) 1 parts total
  bundle2-output-part: "changegroup" (params: 1 mandatory 1 advisory) streamed payload
  saved backup bundle to $TESTTMP/issue4736/.hg/strip-backup/6625a5168474-345bb43d-backup.hg (glob)
  invalid branchheads cache (served): tip differs
  truncating cache/rbc-revs-v1 to 24
  $ hg log -G
  o  changeset:   2:5c51d8d6557d