tests/test-phases-exchange.t

changelog: disable delta chains

This patch disables delta chains on changelogs. After this patch, new
entries on changelogs - including existing changelogs - will be stored
as the fulltext of that data (likely compressed). No delta computation
will be performed.

An overview of delta chains and data justifying this change follows.

Revlogs try to store entries as a delta against a previous entry (either
a parent revision in the case of generaldelta or the previous physical
revision when not using generaldelta). Most of the time this is the
correct thing to do: it frequently results in less CPU usage and smaller
storage.

Delta chains are most effective when the base revision being deltad
against is similar to the current data. This tends to occur naturally
for manifests and file data, since only small parts of each tend to
change with each revision. Changelogs, however, are a different story.

Changelog entries represent changesets/commits. And unless commits in a
repository are homogonous (same author, changing same files, similar
commit messages, etc), a delta from one entry to the next tends to be
relatively large compared to the size of the entry. This means that
delta chains tend to be short. How short? Here is the full vs delta
revision breakdown on some real world repos:

Repo             % Full    % Delta   Max Length
hg                45.8       54.2        6
mozilla-central   42.4       57.6        8
mozilla-unified   42.5       57.5       17
pypy              46.1       53.9        6
python-zstandard  46.1       53.9        3

(I threw in python-zstandard as an example of a repo that is homogonous.
It contains a small Python project with changes all from the same
author.)

Contrast this with the manifest revlog for these repos, where 99+% of
revisions are deltas and delta chains run into the thousands.

So delta chains aren't as useful on changelogs. But even a short delta
chain may provide benefits. Let's measure that.

Delta chains may require less CPU to read revisions if the CPU time
spent reading smaller deltas is less than the CPU time used to
decompress larger individual entries. We can measure this via
`hg perfrevlog -c -d 1` to iterate a revlog to resolve each revision's
fulltext. Here are the results of that command on a repo using delta
chains in its changelog and on a repo without delta chains:

hg (forward)
! wall 0.407008 comb 0.410000 user 0.410000 sys 0.000000 (best of 25)
! wall 0.390061 comb 0.390000 user 0.390000 sys 0.000000 (best of 26)

hg (reverse)
! wall 0.515221 comb 0.520000 user 0.520000 sys 0.000000 (best of 19)
! wall 0.400018 comb 0.400000 user 0.390000 sys 0.010000 (best of 25)

mozilla-central (forward)
! wall 4.508296 comb 4.490000 user 4.490000 sys 0.000000 (best of 3)
! wall 4.370222 comb 4.370000 user 4.350000 sys 0.020000 (best of 3)

mozilla-central (reverse)
! wall 5.758995 comb 5.760000 user 5.720000 sys 0.040000 (best of 3)
! wall 4.346503 comb 4.340000 user 4.320000 sys 0.020000 (best of 3)

mozilla-unified (forward)
! wall 4.957088 comb 4.950000 user 4.940000 sys 0.010000 (best of 3)
! wall 4.660528 comb 4.650000 user 4.630000 sys 0.020000 (best of 3)

mozilla-unified (reverse)
! wall 6.119827 comb 6.110000 user 6.090000 sys 0.020000 (best of 3)
! wall 4.675136 comb 4.670000 user 4.670000 sys 0.000000 (best of 3)

pypy (forward)
! wall 1.231122 comb 1.240000 user 1.230000 sys 0.010000 (best of 8)
! wall 1.164896 comb 1.160000 user 1.160000 sys 0.000000 (best of 9)

pypy (reverse)
! wall 1.467049 comb 1.460000 user 1.460000 sys 0.000000 (best of 7)
! wall 1.160200 comb 1.170000 user 1.160000 sys 0.010000 (best of 9)

The data clearly shows that it takes less wall and CPU time to resolve
revisions when there are no delta chains in the changelogs, regardless
of the direction of traversal. Furthermore, not using a delta chain
means that fulltext resolution in reverse is as fast as iterating
forward. So not using delta chains on the changelog is a clear CPU win
for reading operations.

An example of a user-visible operation showing this speed-up is revset
evaluation. Here are results for
`hg perfrevset 'author(gps) or author(mpm)'`:

hg
! wall 1.655506 comb 1.660000 user 1.650000 sys 0.010000 (best of 6)
! wall 1.612723 comb 1.610000 user 1.600000 sys 0.010000 (best of 7)

mozilla-central
! wall 17.629826 comb 17.640000 user 17.600000 sys 0.040000 (best of 3)
! wall 17.311033 comb 17.300000 user 17.260000 sys 0.040000 (best of 3)

What about 00changelog.i size?

Repo                Delta Chains     No Delta Chains
hg                    7,033,250         6,976,771
mozilla-central      82,978,748        81,574,623
mozilla-unified      88,112,349        86,702,162
pypy                 20,740,699        20,659,741

The data shows that removing delta chains from the changelog makes the
changelog smaller.

Delta chains are also used during changegroup generation. This
operation essentially converts a series of revisions to one large
delta chain. And changegroup generation is smart: if the delta in
the revlog matches what the changegroup is emitting, it will reuse
the delta instead of recalculating it. We can measure the impact
removing changelog delta chains has on changegroup generation via
`hg perfchangegroupchangelog`:

hg
! wall 1.589245 comb 1.590000 user 1.590000 sys 0.000000 (best of 7)
! wall 1.788060 comb 1.790000 user 1.790000 sys 0.000000 (best of 6)

mozilla-central
! wall 17.382585 comb 17.380000 user 17.340000 sys 0.040000 (best of 3)
! wall 20.161357 comb 20.160000 user 20.120000 sys 0.040000 (best of 3)

mozilla-unified
! wall 18.722839 comb 18.720000 user 18.680000 sys 0.040000 (best of 3)
! wall 21.168075 comb 21.170000 user 21.130000 sys 0.040000 (best of 3)

pypy
! wall 4.828317 comb 4.830000 user 4.820000 sys 0.010000 (best of 3)
! wall 5.415455 comb 5.420000 user 5.410000 sys 0.010000 (best of 3)

The data shows eliminating delta chains makes the changelog part of
changegroup generation slower. This is expected since we now have to
compute deltas for revisions where we could recycle the delta before.

It is worth putting this regression into context of overall changegroup
times. Here is the rough total CPU time spent in changegroup generation
for various repos while using delta chains on the changelog:

Repo              CPU Time (s)    CPU Time w/ compression
hg                  4.50              7.05
mozilla-central   111.1             222.0
pypy               28.68             75.5

Before compression, removing delta chains from the changegroup adds
~4.4% overhead to hg changegroup generation, 1.3% to mozilla-central,
and 2.0% to pypy. When you factor in zlib compression, these percentages
are roughly divided by 2.

While the increased CPU usage for changegroup generation is unfortunate,
I think it is acceptable because the percentage is small, server
operators (those likely impacted most by this) have other mechanisms
to mitigate CPU consumption (namely reducing zlib compression level and
pre-generated clone bundles), and because there is room to optimize this
in the future. For example, we could use the nullid as the base revision,
effectively encoding the full revision for each entry in the changegroup.
When doing this, `hg perfchangegroupchangelog` nearly halves:

mozilla-unified
! wall 21.168075 comb 21.170000 user 21.130000 sys 0.040000 (best of 3)
! wall 11.196461 comb 11.200000 user 11.190000 sys 0.010000 (best of 3)

This looks very promising as a future optimization opportunity.

It's worth that the changes in test-acl.t to the changegroup part size.
This is because revision 6 in the changegroup had a delta chain of
length 2 before and after this patch the base revision is nullrev.
When the base revision is nullrev, cg2packer.deltaparent() hardcodes
the *previous* revision from the changegroup as the delta parent.
This caused the delta in the changegroup to switch base revisions,
the delta to change, and the size to change accordingly. While the
size increased in this case, I think sizes will remain the same
on average, as the delta base for changelog revisions doesn't matter
too much (as this patch shows). So, I don't consider this a regression.

#require killdaemons

  $ hgph() { hg log -G --template "{rev} {phase} {desc} - {node|short}\n" $*; }

  $ mkcommit() {
  >    echo "$1" > "$1"
  >    hg add "$1"
  >    message="$1"
  >    shift
  >    hg ci -m "$message" $*
  > }

  $ hg init alpha
  $ cd alpha
  $ mkcommit a-A
  $ mkcommit a-B
  $ mkcommit a-C
  $ mkcommit a-D
  $ hgph
  @  3 draft a-D - b555f63b6063
  |
  o  2 draft a-C - 54acac6f23ab
  |
  o  1 draft a-B - 548a3d25dbf0
  |
  o  0 draft a-A - 054250a37db4
  

  $ hg init ../beta
  $ hg push -r 1 ../beta
  pushing to ../beta
  searching for changes
  adding changesets
  adding manifests
  adding file changes
  added 2 changesets with 2 changes to 2 files
  $ hgph
  @  3 draft a-D - b555f63b6063
  |
  o  2 draft a-C - 54acac6f23ab
  |
  o  1 public a-B - 548a3d25dbf0
  |
  o  0 public a-A - 054250a37db4
  

  $ cd ../beta
  $ hgph
  o  1 public a-B - 548a3d25dbf0
  |
  o  0 public a-A - 054250a37db4
  
  $ hg up -q
  $ mkcommit b-A
  $ hgph
  @  2 draft b-A - f54f1bb90ff3
  |
  o  1 public a-B - 548a3d25dbf0
  |
  o  0 public a-A - 054250a37db4
  
  $ hg pull ../alpha
  pulling from ../alpha
  searching for changes
  adding changesets
  adding manifests
  adding file changes
  added 2 changesets with 2 changes to 2 files (+1 heads)
  (run 'hg heads' to see heads, 'hg merge' to merge)
  $ hgph
  o  4 public a-D - b555f63b6063
  |
  o  3 public a-C - 54acac6f23ab
  |
  | @  2 draft b-A - f54f1bb90ff3
  |/
  o  1 public a-B - 548a3d25dbf0
  |
  o  0 public a-A - 054250a37db4
  

pull did not updated ../alpha state.
push from alpha to beta should update phase even if nothing is transferred

  $ cd ../alpha
  $ hgph # not updated by remote pull
  @  3 draft a-D - b555f63b6063
  |
  o  2 draft a-C - 54acac6f23ab
  |
  o  1 public a-B - 548a3d25dbf0
  |
  o  0 public a-A - 054250a37db4
  
  $ hg push -r 2 ../beta
  pushing to ../beta
  searching for changes
  no changes found
  [1]
  $ hgph
  @  3 draft a-D - b555f63b6063
  |
  o  2 public a-C - 54acac6f23ab
  |
  o  1 public a-B - 548a3d25dbf0
  |
  o  0 public a-A - 054250a37db4
  
  $ hg push ../beta
  pushing to ../beta
  searching for changes
  no changes found
  [1]
  $ hgph
  @  3 public a-D - b555f63b6063
  |
  o  2 public a-C - 54acac6f23ab
  |
  o  1 public a-B - 548a3d25dbf0
  |
  o  0 public a-A - 054250a37db4
  

update must update phase of common changeset too

  $ hg pull ../beta # getting b-A
  pulling from ../beta
  searching for changes
  adding changesets
  adding manifests
  adding file changes
  added 1 changesets with 1 changes to 1 files (+1 heads)
  (run 'hg heads' to see heads, 'hg merge' to merge)

  $ cd ../beta
  $ hgph # not updated by remote pull
  o  4 public a-D - b555f63b6063
  |
  o  3 public a-C - 54acac6f23ab
  |
  | @  2 draft b-A - f54f1bb90ff3
  |/
  o  1 public a-B - 548a3d25dbf0
  |
  o  0 public a-A - 054250a37db4
  
  $ hg pull ../alpha
  pulling from ../alpha
  searching for changes
  no changes found
  $ hgph
  o  4 public a-D - b555f63b6063
  |
  o  3 public a-C - 54acac6f23ab
  |
  | @  2 public b-A - f54f1bb90ff3
  |/
  o  1 public a-B - 548a3d25dbf0
  |
  o  0 public a-A - 054250a37db4
  

Publish configuration option
----------------------------

Pull
````

changegroup are added without phase movement

  $ hg bundle -a ../base.bundle
  5 changesets found
  $ cd ..
  $ hg init mu
  $ cd mu
  $ cat > .hg/hgrc << EOF
  > [phases]
  > publish=0
  > EOF
  $ hg unbundle ../base.bundle
  adding changesets
  adding manifests
  adding file changes
  added 5 changesets with 5 changes to 5 files (+1 heads)
  (run 'hg heads' to see heads, 'hg merge' to merge)
  $ hgph
  o  4 draft a-D - b555f63b6063
  |
  o  3 draft a-C - 54acac6f23ab
  |
  | o  2 draft b-A - f54f1bb90ff3
  |/
  o  1 draft a-B - 548a3d25dbf0
  |
  o  0 draft a-A - 054250a37db4
  
  $ cd ..

Pulling from publish=False to publish=False does not move boundary.

  $ hg init nu
  $ cd nu
  $ cat > .hg/hgrc << EOF
  > [phases]
  > publish=0
  > EOF
  $ hg pull ../mu -r 54acac6f23ab
  pulling from ../mu
  adding changesets
  adding manifests
  adding file changes
  added 3 changesets with 3 changes to 3 files
  (run 'hg update' to get a working copy)
  $ hgph
  o  2 draft a-C - 54acac6f23ab
  |
  o  1 draft a-B - 548a3d25dbf0
  |
  o  0 draft a-A - 054250a37db4
  

Even for common

  $ hg pull ../mu -r f54f1bb90ff3
  pulling from ../mu
  searching for changes
  adding changesets
  adding manifests
  adding file changes
  added 1 changesets with 1 changes to 1 files (+1 heads)
  (run 'hg heads' to see heads, 'hg merge' to merge)
  $ hgph
  o  3 draft b-A - f54f1bb90ff3
  |
  | o  2 draft a-C - 54acac6f23ab
  |/
  o  1 draft a-B - 548a3d25dbf0
  |
  o  0 draft a-A - 054250a37db4
  


Pulling from Publish=True to Publish=False move boundary in common set.
we are in nu

  $ hg pull ../alpha -r b555f63b6063
  pulling from ../alpha
  searching for changes
  adding changesets
  adding manifests
  adding file changes
  added 1 changesets with 1 changes to 1 files
  (run 'hg update' to get a working copy)
  $ hgph # f54f1bb90ff3 stay draft, not ancestor of -r
  o  4 public a-D - b555f63b6063
  |
  | o  3 draft b-A - f54f1bb90ff3
  | |
  o |  2 public a-C - 54acac6f23ab
  |/
  o  1 public a-B - 548a3d25dbf0
  |
  o  0 public a-A - 054250a37db4
  

pulling from Publish=False to publish=False with some public

  $ hg up -q f54f1bb90ff3
  $ mkcommit n-A
  $ mkcommit n-B
  $ hgph
  @  6 draft n-B - 145e75495359
  |
  o  5 draft n-A - d6bcb4f74035
  |
  | o  4 public a-D - b555f63b6063
  | |
  o |  3 draft b-A - f54f1bb90ff3
  | |
  | o  2 public a-C - 54acac6f23ab
  |/
  o  1 public a-B - 548a3d25dbf0
  |
  o  0 public a-A - 054250a37db4
  
  $ cd ../mu
  $ hg pull ../nu
  pulling from ../nu
  searching for changes
  adding changesets
  adding manifests
  adding file changes
  added 2 changesets with 2 changes to 2 files
  (run 'hg update' to get a working copy)
  $ hgph
  o  6 draft n-B - 145e75495359
  |
  o  5 draft n-A - d6bcb4f74035
  |
  | o  4 public a-D - b555f63b6063
  | |
  | o  3 public a-C - 54acac6f23ab
  | |
  o |  2 draft b-A - f54f1bb90ff3
  |/
  o  1 public a-B - 548a3d25dbf0
  |
  o  0 public a-A - 054250a37db4
  
  $ cd ..

pulling into publish=True

  $ cd alpha
  $ hgph
  o  4 public b-A - f54f1bb90ff3
  |
  | @  3 public a-D - b555f63b6063
  | |
  | o  2 public a-C - 54acac6f23ab
  |/
  o  1 public a-B - 548a3d25dbf0
  |
  o  0 public a-A - 054250a37db4
  
  $ hg pull ../mu
  pulling from ../mu
  searching for changes
  adding changesets
  adding manifests
  adding file changes
  added 2 changesets with 2 changes to 2 files
  (run 'hg update' to get a working copy)
  $ hgph
  o  6 draft n-B - 145e75495359
  |
  o  5 draft n-A - d6bcb4f74035
  |
  o  4 public b-A - f54f1bb90ff3
  |
  | @  3 public a-D - b555f63b6063
  | |
  | o  2 public a-C - 54acac6f23ab
  |/
  o  1 public a-B - 548a3d25dbf0
  |
  o  0 public a-A - 054250a37db4
  
  $ cd ..

pulling back into original repo

  $ cd nu
  $ hg pull ../alpha
  pulling from ../alpha
  searching for changes
  no changes found
  $ hgph
  @  6 public n-B - 145e75495359
  |
  o  5 public n-A - d6bcb4f74035
  |
  | o  4 public a-D - b555f63b6063
  | |
  o |  3 public b-A - f54f1bb90ff3
  | |
  | o  2 public a-C - 54acac6f23ab
  |/
  o  1 public a-B - 548a3d25dbf0
  |
  o  0 public a-A - 054250a37db4
  

Push
````

(inserted)

Test that phase are pushed even when they are nothing to pus
(this might be tested later bu are very convenient to not alter too much test)

Push back to alpha

  $ hg push ../alpha # from nu
  pushing to ../alpha
  searching for changes
  no changes found
  [1]
  $ cd ..
  $ cd alpha
  $ hgph
  o  6 public n-B - 145e75495359
  |
  o  5 public n-A - d6bcb4f74035
  |
  o  4 public b-A - f54f1bb90ff3
  |
  | @  3 public a-D - b555f63b6063
  | |
  | o  2 public a-C - 54acac6f23ab
  |/
  o  1 public a-B - 548a3d25dbf0
  |
  o  0 public a-A - 054250a37db4
  

(end insertion)


initial setup

  $ hg log -G # of alpha
  o  changeset:   6:145e75495359
  |  tag:         tip
  |  user:        test
  |  date:        Thu Jan 01 00:00:00 1970 +0000
  |  summary:     n-B
  |
  o  changeset:   5:d6bcb4f74035
  |  user:        test
  |  date:        Thu Jan 01 00:00:00 1970 +0000
  |  summary:     n-A
  |
  o  changeset:   4:f54f1bb90ff3
  |  parent:      1:548a3d25dbf0
  |  user:        test
  |  date:        Thu Jan 01 00:00:00 1970 +0000
  |  summary:     b-A
  |
  | @  changeset:   3:b555f63b6063
  | |  user:        test
  | |  date:        Thu Jan 01 00:00:00 1970 +0000
  | |  summary:     a-D
  | |
  | o  changeset:   2:54acac6f23ab
  |/   user:        test
  |    date:        Thu Jan 01 00:00:00 1970 +0000
  |    summary:     a-C
  |
  o  changeset:   1:548a3d25dbf0
  |  user:        test
  |  date:        Thu Jan 01 00:00:00 1970 +0000
  |  summary:     a-B
  |
  o  changeset:   0:054250a37db4
     user:        test
     date:        Thu Jan 01 00:00:00 1970 +0000
     summary:     a-A
  
  $ mkcommit a-E
  $ mkcommit a-F
  $ mkcommit a-G
  $ hg up d6bcb4f74035 -q
  $ mkcommit a-H
  created new head
  $ hgph
  @  10 draft a-H - 967b449fbc94
  |
  | o  9 draft a-G - 3e27b6f1eee1
  | |
  | o  8 draft a-F - b740e3e5c05d
  | |
  | o  7 draft a-E - e9f537e46dea
  | |
  +---o  6 public n-B - 145e75495359
  | |
  o |  5 public n-A - d6bcb4f74035
  | |
  o |  4 public b-A - f54f1bb90ff3
  | |
  | o  3 public a-D - b555f63b6063
  | |
  | o  2 public a-C - 54acac6f23ab
  |/
  o  1 public a-B - 548a3d25dbf0
  |
  o  0 public a-A - 054250a37db4
  

Pulling from bundle does not alter phases of changeset not present in the bundle

  $ hg bundle  --base 1 -r 6 -r 3 ../partial-bundle.hg
  5 changesets found
  $ hg pull ../partial-bundle.hg
  pulling from ../partial-bundle.hg
  searching for changes
  no changes found
  $ hgph
  @  10 draft a-H - 967b449fbc94
  |
  | o  9 draft a-G - 3e27b6f1eee1
  | |
  | o  8 draft a-F - b740e3e5c05d
  | |
  | o  7 draft a-E - e9f537e46dea
  | |
  +---o  6 public n-B - 145e75495359
  | |
  o |  5 public n-A - d6bcb4f74035
  | |
  o |  4 public b-A - f54f1bb90ff3
  | |
  | o  3 public a-D - b555f63b6063
  | |
  | o  2 public a-C - 54acac6f23ab
  |/
  o  1 public a-B - 548a3d25dbf0
  |
  o  0 public a-A - 054250a37db4
  

Pushing to Publish=False (unknown changeset)

  $ hg push ../mu -r b740e3e5c05d # a-F
  pushing to ../mu
  searching for changes
  adding changesets
  adding manifests
  adding file changes
  added 2 changesets with 2 changes to 2 files
  $ hgph
  @  10 draft a-H - 967b449fbc94
  |
  | o  9 draft a-G - 3e27b6f1eee1
  | |
  | o  8 draft a-F - b740e3e5c05d
  | |
  | o  7 draft a-E - e9f537e46dea
  | |
  +---o  6 public n-B - 145e75495359
  | |
  o |  5 public n-A - d6bcb4f74035
  | |
  o |  4 public b-A - f54f1bb90ff3
  | |
  | o  3 public a-D - b555f63b6063
  | |
  | o  2 public a-C - 54acac6f23ab
  |/
  o  1 public a-B - 548a3d25dbf0
  |
  o  0 public a-A - 054250a37db4
  

  $ cd ../mu
  $ hgph # again f54f1bb90ff3, d6bcb4f74035 and 145e75495359 stay draft,
  >      # not ancestor of -r
  o  8 draft a-F - b740e3e5c05d
  |
  o  7 draft a-E - e9f537e46dea
  |
  | o  6 draft n-B - 145e75495359
  | |
  | o  5 draft n-A - d6bcb4f74035
  | |
  o |  4 public a-D - b555f63b6063
  | |
  o |  3 public a-C - 54acac6f23ab
  | |
  | o  2 draft b-A - f54f1bb90ff3
  |/
  o  1 public a-B - 548a3d25dbf0
  |
  o  0 public a-A - 054250a37db4
  

Pushing to Publish=True (unknown changeset)

  $ hg push ../beta -r b740e3e5c05d
  pushing to ../beta
  searching for changes
  adding changesets
  adding manifests
  adding file changes
  added 2 changesets with 2 changes to 2 files
  $ hgph # again f54f1bb90ff3, d6bcb4f74035 and 145e75495359 stay draft,
  >      # not ancestor of -r
  o  8 public a-F - b740e3e5c05d
  |
  o  7 public a-E - e9f537e46dea
  |
  | o  6 draft n-B - 145e75495359
  | |
  | o  5 draft n-A - d6bcb4f74035
  | |
  o |  4 public a-D - b555f63b6063
  | |
  o |  3 public a-C - 54acac6f23ab
  | |
  | o  2 draft b-A - f54f1bb90ff3
  |/
  o  1 public a-B - 548a3d25dbf0
  |
  o  0 public a-A - 054250a37db4
  

Pushing to Publish=True (common changeset)

  $ cd ../beta
  $ hg push ../alpha
  pushing to ../alpha
  searching for changes
  no changes found
  [1]
  $ hgph
  o  6 public a-F - b740e3e5c05d
  |
  o  5 public a-E - e9f537e46dea
  |
  o  4 public a-D - b555f63b6063
  |
  o  3 public a-C - 54acac6f23ab
  |
  | @  2 public b-A - f54f1bb90ff3
  |/
  o  1 public a-B - 548a3d25dbf0
  |
  o  0 public a-A - 054250a37db4
  
  $ cd ../alpha
  $ hgph
  @  10 draft a-H - 967b449fbc94
  |
  | o  9 draft a-G - 3e27b6f1eee1
  | |
  | o  8 public a-F - b740e3e5c05d
  | |
  | o  7 public a-E - e9f537e46dea
  | |
  +---o  6 public n-B - 145e75495359
  | |
  o |  5 public n-A - d6bcb4f74035
  | |
  o |  4 public b-A - f54f1bb90ff3
  | |
  | o  3 public a-D - b555f63b6063
  | |
  | o  2 public a-C - 54acac6f23ab
  |/
  o  1 public a-B - 548a3d25dbf0
  |
  o  0 public a-A - 054250a37db4
  

Pushing to Publish=False (common changeset that change phase + unknown one)

  $ hg push ../mu -r 967b449fbc94 -f
  pushing to ../mu
  searching for changes
  adding changesets
  adding manifests
  adding file changes
  added 1 changesets with 1 changes to 1 files (+1 heads)
  $ hgph
  @  10 draft a-H - 967b449fbc94
  |
  | o  9 draft a-G - 3e27b6f1eee1
  | |
  | o  8 public a-F - b740e3e5c05d
  | |
  | o  7 public a-E - e9f537e46dea
  | |
  +---o  6 public n-B - 145e75495359
  | |
  o |  5 public n-A - d6bcb4f74035
  | |
  o |  4 public b-A - f54f1bb90ff3
  | |
  | o  3 public a-D - b555f63b6063
  | |
  | o  2 public a-C - 54acac6f23ab
  |/
  o  1 public a-B - 548a3d25dbf0
  |
  o  0 public a-A - 054250a37db4
  
  $ cd ../mu
  $ hgph # d6bcb4f74035 should have changed phase
  >      # 145e75495359 is still draft. not ancestor of -r
  o  9 draft a-H - 967b449fbc94
  |
  | o  8 public a-F - b740e3e5c05d
  | |
  | o  7 public a-E - e9f537e46dea
  | |
  +---o  6 draft n-B - 145e75495359
  | |
  o |  5 public n-A - d6bcb4f74035
  | |
  | o  4 public a-D - b555f63b6063
  | |
  | o  3 public a-C - 54acac6f23ab
  | |
  o |  2 public b-A - f54f1bb90ff3
  |/
  o  1 public a-B - 548a3d25dbf0
  |
  o  0 public a-A - 054250a37db4
  


Pushing to Publish=True (common changeset from publish=False)

(in mu)
  $ hg push ../alpha
  pushing to ../alpha
  searching for changes
  no changes found
  [1]
  $ hgph
  o  9 public a-H - 967b449fbc94
  |
  | o  8 public a-F - b740e3e5c05d
  | |
  | o  7 public a-E - e9f537e46dea
  | |
  +---o  6 public n-B - 145e75495359
  | |
  o |  5 public n-A - d6bcb4f74035
  | |
  | o  4 public a-D - b555f63b6063
  | |
  | o  3 public a-C - 54acac6f23ab
  | |
  o |  2 public b-A - f54f1bb90ff3
  |/
  o  1 public a-B - 548a3d25dbf0
  |
  o  0 public a-A - 054250a37db4
  
  $ hgph -R ../alpha # a-H should have been synced to 0
  @  10 public a-H - 967b449fbc94
  |
  | o  9 draft a-G - 3e27b6f1eee1
  | |
  | o  8 public a-F - b740e3e5c05d
  | |
  | o  7 public a-E - e9f537e46dea
  | |
  +---o  6 public n-B - 145e75495359
  | |
  o |  5 public n-A - d6bcb4f74035
  | |
  o |  4 public b-A - f54f1bb90ff3
  | |
  | o  3 public a-D - b555f63b6063
  | |
  | o  2 public a-C - 54acac6f23ab
  |/
  o  1 public a-B - 548a3d25dbf0
  |
  o  0 public a-A - 054250a37db4
  


Bare push with next changeset and common changeset needing sync (issue3575)

(reset some stat on remote repo to avoid confusing other tests)

  $ hg -R ../alpha --config extensions.strip= strip --no-backup 967b449fbc94
  0 files updated, 0 files merged, 1 files removed, 0 files unresolved
  $ hg phase --force --draft b740e3e5c05d 967b449fbc94
  $ hg push -fv ../alpha
  pushing to ../alpha
  searching for changes
  1 changesets found
  uncompressed size of bundle content:
       192 (changelog)
       165 (manifests)
       131  a-H
  adding changesets
  adding manifests
  adding file changes
  added 1 changesets with 1 changes to 1 files (+1 heads)
  $ hgph
  o  9 public a-H - 967b449fbc94
  |
  | o  8 public a-F - b740e3e5c05d
  | |
  | o  7 public a-E - e9f537e46dea
  | |
  +---o  6 public n-B - 145e75495359
  | |
  o |  5 public n-A - d6bcb4f74035
  | |
  | o  4 public a-D - b555f63b6063
  | |
  | o  3 public a-C - 54acac6f23ab
  | |
  o |  2 public b-A - f54f1bb90ff3
  |/
  o  1 public a-B - 548a3d25dbf0
  |
  o  0 public a-A - 054250a37db4
  

  $ hg -R ../alpha update 967b449fbc94 #for latter test consistency
  1 files updated, 0 files merged, 0 files removed, 0 files unresolved
  $ hgph -R ../alpha
  @  10 public a-H - 967b449fbc94
  |
  | o  9 draft a-G - 3e27b6f1eee1
  | |
  | o  8 public a-F - b740e3e5c05d
  | |
  | o  7 public a-E - e9f537e46dea
  | |
  +---o  6 public n-B - 145e75495359
  | |
  o |  5 public n-A - d6bcb4f74035
  | |
  o |  4 public b-A - f54f1bb90ff3
  | |
  | o  3 public a-D - b555f63b6063
  | |
  | o  2 public a-C - 54acac6f23ab
  |/
  o  1 public a-B - 548a3d25dbf0
  |
  o  0 public a-A - 054250a37db4
  

Discovery locally secret changeset on a remote repository:

- should make it non-secret

  $ cd ../alpha
  $ mkcommit A-secret --config phases.new-commit=2
  $ hgph
  @  11 secret A-secret - 435b5d83910c
  |
  o  10 public a-H - 967b449fbc94
  |
  | o  9 draft a-G - 3e27b6f1eee1
  | |
  | o  8 public a-F - b740e3e5c05d
  | |
  | o  7 public a-E - e9f537e46dea
  | |
  +---o  6 public n-B - 145e75495359
  | |
  o |  5 public n-A - d6bcb4f74035
  | |
  o |  4 public b-A - f54f1bb90ff3
  | |
  | o  3 public a-D - b555f63b6063
  | |
  | o  2 public a-C - 54acac6f23ab
  |/
  o  1 public a-B - 548a3d25dbf0
  |
  o  0 public a-A - 054250a37db4
  
  $ hg bundle --base 'parents(.)' -r . ../secret-bundle.hg
  1 changesets found
  $ hg -R ../mu unbundle ../secret-bundle.hg
  adding changesets
  adding manifests
  adding file changes
  added 1 changesets with 1 changes to 1 files
  (run 'hg update' to get a working copy)
  $ hgph -R ../mu
  o  10 draft A-secret - 435b5d83910c
  |
  o  9 public a-H - 967b449fbc94
  |
  | o  8 public a-F - b740e3e5c05d
  | |
  | o  7 public a-E - e9f537e46dea
  | |
  +---o  6 public n-B - 145e75495359
  | |
  o |  5 public n-A - d6bcb4f74035
  | |
  | o  4 public a-D - b555f63b6063
  | |
  | o  3 public a-C - 54acac6f23ab
  | |
  o |  2 public b-A - f54f1bb90ff3
  |/
  o  1 public a-B - 548a3d25dbf0
  |
  o  0 public a-A - 054250a37db4
  
  $ hg pull ../mu
  pulling from ../mu
  searching for changes
  no changes found
  $ hgph
  @  11 draft A-secret - 435b5d83910c
  |
  o  10 public a-H - 967b449fbc94
  |
  | o  9 draft a-G - 3e27b6f1eee1
  | |
  | o  8 public a-F - b740e3e5c05d
  | |
  | o  7 public a-E - e9f537e46dea
  | |
  +---o  6 public n-B - 145e75495359
  | |
  o |  5 public n-A - d6bcb4f74035
  | |
  o |  4 public b-A - f54f1bb90ff3
  | |
  | o  3 public a-D - b555f63b6063
  | |
  | o  2 public a-C - 54acac6f23ab
  |/
  o  1 public a-B - 548a3d25dbf0
  |
  o  0 public a-A - 054250a37db4
  

pushing a locally public and draft changesets remotely secret should make them
appear on the remote side.

  $ hg -R ../mu phase --secret --force 967b449fbc94
  $ hg push -r 435b5d83910c ../mu
  pushing to ../mu
  searching for changes
  abort: push creates new remote head 435b5d83910c!
  (merge or see 'hg help push' for details about pushing new heads)
  [255]
  $ hg push -fr 435b5d83910c ../mu # because the push will create new visible head
  pushing to ../mu
  searching for changes
  adding changesets
  adding manifests
  adding file changes
  added 0 changesets with 0 changes to 2 files
  $ hgph -R ../mu
  o  10 draft A-secret - 435b5d83910c
  |
  o  9 public a-H - 967b449fbc94
  |
  | o  8 public a-F - b740e3e5c05d
  | |
  | o  7 public a-E - e9f537e46dea
  | |
  +---o  6 public n-B - 145e75495359
  | |
  o |  5 public n-A - d6bcb4f74035
  | |
  | o  4 public a-D - b555f63b6063
  | |
  | o  3 public a-C - 54acac6f23ab
  | |
  o |  2 public b-A - f54f1bb90ff3
  |/
  o  1 public a-B - 548a3d25dbf0
  |
  o  0 public a-A - 054250a37db4
  

pull new changeset with common draft locally

  $ hg up -q 967b449fbc94 # create a new root for draft
  $ mkcommit 'alpha-more'
  created new head
  $ hg push -fr . ../mu
  pushing to ../mu
  searching for changes
  adding changesets
  adding manifests
  adding file changes
  added 1 changesets with 1 changes to 1 files (+1 heads)
  $ cd ../mu
  $ hg phase --secret --force 1c5cfd894796
  $ hg up -q 435b5d83910c
  $ mkcommit 'mu-more'
  $ cd ../alpha
  $ hg pull ../mu
  pulling from ../mu
  searching for changes
  adding changesets
  adding manifests
  adding file changes
  added 1 changesets with 1 changes to 1 files
  (run 'hg update' to get a working copy)
  $ hgph
  o  13 draft mu-more - 5237fb433fc8
  |
  | @  12 draft alpha-more - 1c5cfd894796
  | |
  o |  11 draft A-secret - 435b5d83910c
  |/
  o  10 public a-H - 967b449fbc94
  |
  | o  9 draft a-G - 3e27b6f1eee1
  | |
  | o  8 public a-F - b740e3e5c05d
  | |
  | o  7 public a-E - e9f537e46dea
  | |
  +---o  6 public n-B - 145e75495359
  | |
  o |  5 public n-A - d6bcb4f74035
  | |
  o |  4 public b-A - f54f1bb90ff3
  | |
  | o  3 public a-D - b555f63b6063
  | |
  | o  2 public a-C - 54acac6f23ab
  |/
  o  1 public a-B - 548a3d25dbf0
  |
  o  0 public a-A - 054250a37db4
  

Test that test are properly ignored on remote event when existing locally

  $ cd ..
  $ hg clone -qU -r b555f63b6063 -r f54f1bb90ff3 beta gamma

# pathological case are
#
# * secret remotely
# * known locally
# * repo have uncommon changeset

  $ hg -R beta phase --secret --force f54f1bb90ff3
  $ hg -R gamma phase --draft --force f54f1bb90ff3

  $ cd gamma
  $ hg pull ../beta
  pulling from ../beta
  searching for changes
  adding changesets
  adding manifests
  adding file changes
  added 2 changesets with 2 changes to 2 files
  (run 'hg update' to get a working copy)
  $ hg phase f54f1bb90ff3
  2: draft

same over the wire

  $ cd ../beta
  $ hg serve -p $HGPORT -d --pid-file=../beta.pid -E ../beta-error.log
  $ cat ../beta.pid >> $DAEMON_PIDS
  $ cd ../gamma

  $ hg pull http://localhost:$HGPORT/ # bundle2+
  pulling from http://localhost:$HGPORT/
  searching for changes
  no changes found
  $ hg phase f54f1bb90ff3
  2: draft

enforce bundle1

  $ hg pull http://localhost:$HGPORT/ --config devel.legacy.exchange=bundle1
  pulling from http://localhost:$HGPORT/
  searching for changes
  no changes found
  $ hg phase f54f1bb90ff3
  2: draft

check that secret local on both side are not synced to public

  $ hg push -r b555f63b6063 http://localhost:$HGPORT/
  pushing to http://localhost:$HGPORT/
  searching for changes
  no changes found
  [1]
  $ hg phase f54f1bb90ff3
  2: draft

put the changeset in the draft state again
(first test after this one expect to be able to copy)

  $ cd ..


Test Clone behavior

A. Clone without secret changeset

1.  cloning non-publishing repository
(Phase should be preserved)

# make sure there is no secret so we can use a copy clone

  $ hg -R mu phase --draft 'secret()'

  $ hg clone -U mu Tau
  $ hgph -R Tau
  o  12 draft mu-more - 5237fb433fc8
  |
  | o  11 draft alpha-more - 1c5cfd894796
  | |
  o |  10 draft A-secret - 435b5d83910c
  |/
  o  9 public a-H - 967b449fbc94
  |
  | o  8 public a-F - b740e3e5c05d
  | |
  | o  7 public a-E - e9f537e46dea
  | |
  +---o  6 public n-B - 145e75495359
  | |
  o |  5 public n-A - d6bcb4f74035
  | |
  | o  4 public a-D - b555f63b6063
  | |
  | o  3 public a-C - 54acac6f23ab
  | |
  o |  2 public b-A - f54f1bb90ff3
  |/
  o  1 public a-B - 548a3d25dbf0
  |
  o  0 public a-A - 054250a37db4
  

2. cloning publishing repository

(everything should be public)

  $ hg clone -U alpha Upsilon
  $ hgph -R Upsilon
  o  13 public mu-more - 5237fb433fc8
  |
  | o  12 public alpha-more - 1c5cfd894796
  | |
  o |  11 public A-secret - 435b5d83910c
  |/
  o  10 public a-H - 967b449fbc94
  |
  | o  9 public a-G - 3e27b6f1eee1
  | |
  | o  8 public a-F - b740e3e5c05d
  | |
  | o  7 public a-E - e9f537e46dea
  | |
  +---o  6 public n-B - 145e75495359
  | |
  o |  5 public n-A - d6bcb4f74035
  | |
  o |  4 public b-A - f54f1bb90ff3
  | |
  | o  3 public a-D - b555f63b6063
  | |
  | o  2 public a-C - 54acac6f23ab
  |/
  o  1 public a-B - 548a3d25dbf0
  |
  o  0 public a-A - 054250a37db4
  
#if unix-permissions no-root

Pushing From an unlockable repo
--------------------------------
(issue3684)

Unability to lock the source repo should not prevent the push. It will prevent
the retrieval of remote phase during push. For example, pushing to a publishing
server won't turn changeset public.

1. Test that push is not prevented

  $ hg init Phi
  $ cd Upsilon
  $ chmod -R -w .hg
  $ hg push ../Phi
  pushing to ../Phi
  searching for changes
  adding changesets
  adding manifests
  adding file changes
  added 14 changesets with 14 changes to 14 files (+3 heads)
  $ chmod -R +w .hg

2. Test that failed phases movement are reported

  $ hg phase --force --draft 3
  $ chmod -R -w .hg
  $ hg push ../Phi
  pushing to ../Phi
  searching for changes
  no changes found
  cannot lock source repo, skipping local public phase update
  [1]
  $ chmod -R +w .hg
  $ hgph Upsilon

  $ cd ..

  $ killdaemons.py

#endif