view tests/test-histedit-obsolete.t @ 33289:abd7dedbaa36

sparse: vendor Facebook-developed extension

Facebook has developed an extension to enable "sparse" checkouts -
a working directory with a subset of files. This feature is a critical
component in enabling repositories to scale to infinite number of
files while retaining reasonable performance. It's worth noting
that sparse checkout is only one possible solution to this problem:
another is virtual filesystems that realize files on first access.
But given that virtual filesystems may not be accessible to all
users, sparse checkout is necessary as a fallback.

Per mailing list discussion at
https://www.mercurial-scm.org/pipermail/mercurial-devel/2017-March/095868.html
we want to add sparse checkout to the Mercurial distribution via
roughly the following mechanism:

1. Vendor extension as-is with minimal modifications (this patch)
2. Refactor extension so it is more clearly experimental and inline
   with Mercurial practices
3. Move code from extension into core where possible
4. Drop experimental labeling and/or move feature into core
   after sign-off from narrow clone feature owners

This commit essentially copies the sparse extension and tests
from revision 71e0a2aeca92a4078fe1b8c76e32c88ff1929737 of the
https://bitbucket.org/facebook/hg-experimental repository.

A list of modifications made as part of vendoring is as follows:

* "EXPERIMENTAL" added to module docstring
* Imports were changed to match Mercurial style conventions
* "testedwith" value was updated to core Mercurial special value and
  comment boilerplate was inserted
* A "clone_sparse" function was renamed to "clonesparse" to appease
  the style checker
* Paths to the sparse extension in tests reflect built-in location
* test-sparse-extensions.t was renamed to test-sparse-fsmonitor.t
  and references to "simplecache" were removed. The test always skips
  because it isn't trivial to run it given the way we currently run
  fsmonitor tests
* A double empty line was removed from test-sparse-profiles.t

There are aspects of the added code that are obviously not ideal.
The goal is to make a minimal number of modifications as part of
the vendoring to make it easier to track changes from the original
implementation. Refactoring will occur in subsequent patches.

  $ . "$TESTDIR/histedit-helpers.sh"

Enable obsolete

  $ cat >> $HGRCPATH << EOF
  > [ui]
  > logtemplate= {rev}:{node|short} {desc|firstline}
  > [phases]
  > publish=False
  > [experimental]
  > evolution=createmarkers,allowunstable
  > [extensions]
  > histedit=
  > rebase=
  > EOF

Test that histedit learns about obsolescence not stored in histedit state
  $ hg init boo
  $ cd boo
  $ echo a > a
  $ hg ci -Am a
  adding a
  $ echo a > b
  $ echo a > c
  $ echo a > c
  $ hg ci -Am b
  adding b
  adding c
  $ echo a > d
  $ hg ci -Am c
  adding d
  $ echo "pick `hg log -r 0 -T '{node|short}'`" > plan
  $ echo "pick `hg log -r 2 -T '{node|short}'`" >> plan
  $ echo "edit `hg log -r 1 -T '{node|short}'`" >> plan
  $ hg histedit -r 'all()' --commands plan
  Editing (1b2d564fad96), you may commit or record as needed now.
  (hg histedit --continue to resume)
  [1]
  $ hg st
  A b
  A c
  ? plan
  $ hg commit --amend b
  $ hg histedit --continue
  $ hg log -G
  @  6:46abc7c4d873 b
  |
  o  5:49d44ab2be1b c
  |
  o  0:cb9a9f314b8b a
  
  $ hg debugobsolete
  e72d22b19f8ecf4150ab4f91d0973fd9955d3ddf 49d44ab2be1b67a79127568a67c9c99430633b48 0 (*) {'user': 'test'} (glob)
  3e30a45cf2f719e96ab3922dfe039cfd047956ce 0 {e72d22b19f8ecf4150ab4f91d0973fd9955d3ddf} (*) {'user': 'test'} (glob)
  1b2d564fad96311b45362f17c2aa855150efb35f 46abc7c4d8738e8563e577f7889e1b6db3da4199 0 (*) {'user': 'test'} (glob)
  114f4176969ef342759a8a57e6bccefc4234829b 49d44ab2be1b67a79127568a67c9c99430633b48 0 (*) {'user': 'test'} (glob)

With some node gone missing during the edit.

  $ echo "pick `hg log -r 0 -T '{node|short}'`" > plan
  $ echo "pick `hg log -r 6 -T '{node|short}'`" >> plan
  $ echo "edit `hg log -r 5 -T '{node|short}'`" >> plan
  $ hg histedit -r 'all()' --commands plan
  Editing (49d44ab2be1b), you may commit or record as needed now.
  (hg histedit --continue to resume)
  [1]
  $ hg st
  A b
  A d
  ? plan
  $ hg commit --amend -X . -m XXXXXX
  $ hg commit --amend -X . -m b2
  $ hg --hidden --config extensions.strip= strip 'desc(XXXXXX)' --no-backup
  $ hg histedit --continue
  $ hg log -G
  @  9:273c1f3b8626 c
  |
  o  8:aba7da937030 b2
  |
  o  0:cb9a9f314b8b a
  
  $ hg debugobsolete
  e72d22b19f8ecf4150ab4f91d0973fd9955d3ddf 49d44ab2be1b67a79127568a67c9c99430633b48 0 (*) {'user': 'test'} (glob)
  3e30a45cf2f719e96ab3922dfe039cfd047956ce 0 {e72d22b19f8ecf4150ab4f91d0973fd9955d3ddf} (*) {'user': 'test'} (glob)
  1b2d564fad96311b45362f17c2aa855150efb35f 46abc7c4d8738e8563e577f7889e1b6db3da4199 0 (*) {'user': 'test'} (glob)
  114f4176969ef342759a8a57e6bccefc4234829b 49d44ab2be1b67a79127568a67c9c99430633b48 0 (*) {'user': 'test'} (glob)
  76f72745eac0643d16530e56e2f86e36e40631f1 2ca853e48edbd6453a0674dc0fe28a0974c51b9c 0 (*) {'user': 'test'} (glob)
  2ca853e48edbd6453a0674dc0fe28a0974c51b9c aba7da93703075eec9fb1dbaf143ff2bc1c49d46 0 (*) {'user': 'test'} (glob)
  49d44ab2be1b67a79127568a67c9c99430633b48 273c1f3b86267ed3ec684bb13af1fa4d6ba56e02 0 (*) {'user': 'test'} (glob)
  46abc7c4d8738e8563e577f7889e1b6db3da4199 aba7da93703075eec9fb1dbaf143ff2bc1c49d46 0 (*) {'user': 'test'} (glob)
  $ cd ..

Base setup for the rest of the testing
======================================

  $ hg init base
  $ cd base

  $ for x in a b c d e f ; do
  >     echo $x > $x
  >     hg add $x
  >     hg ci -m $x
  > done

  $ hg log --graph
  @  5:652413bf663e f
  |
  o  4:e860deea161a e
  |
  o  3:055a42cdd887 d
  |
  o  2:177f92b77385 c
  |
  o  1:d2ae7f538514 b
  |
  o  0:cb9a9f314b8b a
  

  $ HGEDITOR=cat hg histedit 1
  pick d2ae7f538514 1 b
  pick 177f92b77385 2 c
  pick 055a42cdd887 3 d
  pick e860deea161a 4 e
  pick 652413bf663e 5 f
  
  # Edit history between d2ae7f538514 and 652413bf663e
  #
  # Commits are listed from least to most recent
  #
  # You can reorder changesets by reordering the lines
  #
  # Commands:
  #
  #  e, edit = use commit, but stop for amending
  #  m, mess = edit commit message without changing commit content
  #  p, pick = use commit
  #  d, drop = remove commit from history
  #  f, fold = use commit, but combine it with the one above
  #  r, roll = like fold, but discard this commit's description and date
  #
  $ hg histedit 1 --commands - --verbose <<EOF | grep histedit
  > pick 177f92b77385 2 c
  > drop d2ae7f538514 1 b
  > pick 055a42cdd887 3 d
  > fold e860deea161a 4 e
  > pick 652413bf663e 5 f
  > EOF
  [1]
  $ hg log --graph --hidden
  @  10:cacdfd884a93 f
  |
  o  9:59d9f330561f d
  |
  | x  8:b558abc46d09 fold-temp-revision e860deea161a
  | |
  | x  7:96e494a2d553 d
  |/
  o  6:b346ab9a313d c
  |
  | x  5:652413bf663e f
  | |
  | x  4:e860deea161a e
  | |
  | x  3:055a42cdd887 d
  | |
  | x  2:177f92b77385 c
  | |
  | x  1:d2ae7f538514 b
  |/
  o  0:cb9a9f314b8b a
  
  $ hg debugobsolete
  96e494a2d553dd05902ba1cee1d94d4cb7b8faed 0 {b346ab9a313db8537ecf96fca3ca3ca984ef3bd7} (*) {'user': 'test'} (glob)
  b558abc46d09c30f57ac31e85a8a3d64d2e906e4 0 {96e494a2d553dd05902ba1cee1d94d4cb7b8faed} (*) {'user': 'test'} (glob)
  d2ae7f538514cd87c17547b0de4cea71fe1af9fb 0 {cb9a9f314b8b07ba71012fcdbc544b5a4d82ff5b} (*) {'user': 'test'} (glob)
  177f92b773850b59254aa5e923436f921b55483b b346ab9a313db8537ecf96fca3ca3ca984ef3bd7 0 (*) {'user': 'test'} (glob)
  055a42cdd88768532f9cf79daa407fc8d138de9b 59d9f330561fd6c88b1a6b32f0e45034d88db784 0 (*) {'user': 'test'} (glob)
  e860deea161a2f77de56603b340ebbb4536308ae 59d9f330561fd6c88b1a6b32f0e45034d88db784 0 (*) {'user': 'test'} (glob)
  652413bf663ef2a641cab26574e46d5f5a64a55a cacdfd884a9321ec4e1de275ef3949fa953a1f83 0 (*) {'user': 'test'} (glob)


Ensure hidden revision does not prevent histedit
-------------------------------------------------

create an hidden revision

  $ hg histedit 6 --commands - << EOF
  > pick b346ab9a313d 6 c
  > drop 59d9f330561f 7 d
  > pick cacdfd884a93 8 f
  > EOF
  $ hg log --graph
  @  11:c13eb81022ca f
  |
  o  6:b346ab9a313d c
  |
  o  0:cb9a9f314b8b a
  
check hidden revision are ignored (6 have hidden children 7 and 8)

  $ hg histedit 6 --commands - << EOF
  > pick b346ab9a313d 6 c
  > pick c13eb81022ca 8 f
  > EOF



Test that rewriting leaving instability behind is allowed
---------------------------------------------------------------------

  $ hg up '.^'
  0 files updated, 0 files merged, 1 files removed, 0 files unresolved
  $ hg log -r 'children(.)'
  11:c13eb81022ca f (no-eol)
  $ hg histedit -r '.' --commands - <<EOF
  > edit b346ab9a313d 6 c
  > EOF
  0 files updated, 0 files merged, 1 files removed, 0 files unresolved
  adding c
  Editing (b346ab9a313d), you may commit or record as needed now.
  (hg histedit --continue to resume)
  [1]
  $ echo c >> c
  $ hg histedit --continue

  $ hg log -r 'unstable()'
  11:c13eb81022ca f (no-eol)

stabilise

  $ hg rebase  -r 'unstable()' -d .
  rebasing 11:c13eb81022ca "f"
  $ hg up tip -q

Test dropping of changeset on the top of the stack
-------------------------------------------------------

Nothing is rewritten below, the working directory parent must be change for the
dropped changeset to be hidden.

  $ cd ..
  $ hg clone base droplast
  updating to branch default
  3 files updated, 0 files merged, 0 files removed, 0 files unresolved
  $ cd droplast
  $ hg histedit -r '40db8afa467b' --commands - << EOF
  > pick 40db8afa467b 10 c
  > drop b449568bf7fc 11 f
  > EOF
  $ hg log -G
  @  12:40db8afa467b c
  |
  o  0:cb9a9f314b8b a
  

With rewritten ancestors

  $ echo e > e
  $ hg add e
  $ hg commit -m g
  $ echo f > f
  $ hg add f
  $ hg commit -m h
  $ hg histedit -r '40db8afa467b' --commands - << EOF
  > pick 47a8561c0449 12 g
  > pick 40db8afa467b 10 c
  > drop 1b3b05f35ff0 13 h
  > EOF
  $ hg log -G
  @  17:ee6544123ab8 c
  |
  o  16:269e713e9eae g
  |
  o  0:cb9a9f314b8b a
  
  $ cd ../base



Test phases support
===========================================

Check that histedit respect immutability
-------------------------------------------

  $ cat >> $HGRCPATH << EOF
  > [ui]
  > logtemplate= {rev}:{node|short} ({phase}) {desc|firstline}\n
  > EOF

  $ hg ph -pv '.^'
  phase changed for 2 changesets
  $ hg log -G
  @  13:b449568bf7fc (draft) f
  |
  o  12:40db8afa467b (public) c
  |
  o  0:cb9a9f314b8b (public) a
  
  $ hg histedit -r '.~2'
  abort: cannot edit public changeset: cb9a9f314b8b
  (see 'hg help phases' for details)
  [255]


Prepare further testing
-------------------------------------------

  $ for x in g h i j k ; do
  >     echo $x > $x
  >     hg add $x
  >     hg ci -m $x
  > done
  $ hg phase --force --secret .~2
  $ hg log -G
  @  18:ee118ab9fa44 (secret) k
  |
  o  17:3a6c53ee7f3d (secret) j
  |
  o  16:b605fb7503f2 (secret) i
  |
  o  15:7395e1ff83bd (draft) h
  |
  o  14:6b70183d2492 (draft) g
  |
  o  13:b449568bf7fc (draft) f
  |
  o  12:40db8afa467b (public) c
  |
  o  0:cb9a9f314b8b (public) a
  
  $ cd ..

simple phase conservation
-------------------------------------------

Resulting changeset should conserve the phase of the original one whatever the
phases.new-commit option is.

New-commit as draft (default)

  $ cp -R base simple-draft
  $ cd simple-draft
  $ hg histedit -r 'b449568bf7fc' --commands - << EOF
  > edit b449568bf7fc 11 f
  > pick 6b70183d2492 12 g
  > pick 7395e1ff83bd 13 h
  > pick b605fb7503f2 14 i
  > pick 3a6c53ee7f3d 15 j
  > pick ee118ab9fa44 16 k
  > EOF
  0 files updated, 0 files merged, 6 files removed, 0 files unresolved
  adding f
  Editing (b449568bf7fc), you may commit or record as needed now.
  (hg histedit --continue to resume)
  [1]
  $ echo f >> f
  $ hg histedit --continue
  $ hg log -G
  @  24:12e89af74238 (secret) k
  |
  o  23:636a8687b22e (secret) j
  |
  o  22:ccaf0a38653f (secret) i
  |
  o  21:11a89d1c2613 (draft) h
  |
  o  20:c1dec7ca82ea (draft) g
  |
  o  19:087281e68428 (draft) f
  |
  o  12:40db8afa467b (public) c
  |
  o  0:cb9a9f314b8b (public) a
  
  $ cd ..


New-commit as secret (config)

  $ cp -R base simple-secret
  $ cd simple-secret
  $ cat >> .hg/hgrc << EOF
  > [phases]
  > new-commit=secret
  > EOF
  $ hg histedit -r 'b449568bf7fc' --commands - << EOF
  > edit b449568bf7fc 11 f
  > pick 6b70183d2492 12 g
  > pick 7395e1ff83bd 13 h
  > pick b605fb7503f2 14 i
  > pick 3a6c53ee7f3d 15 j
  > pick ee118ab9fa44 16 k
  > EOF
  0 files updated, 0 files merged, 6 files removed, 0 files unresolved
  adding f
  Editing (b449568bf7fc), you may commit or record as needed now.
  (hg histedit --continue to resume)
  [1]
  $ echo f >> f
  $ hg histedit --continue
  $ hg log -G
  @  24:12e89af74238 (secret) k
  |
  o  23:636a8687b22e (secret) j
  |
  o  22:ccaf0a38653f (secret) i
  |
  o  21:11a89d1c2613 (draft) h
  |
  o  20:c1dec7ca82ea (draft) g
  |
  o  19:087281e68428 (draft) f
  |
  o  12:40db8afa467b (public) c
  |
  o  0:cb9a9f314b8b (public) a
  
  $ cd ..


Changeset reordering
-------------------------------------------

If a secret changeset is put before a draft one, all descendant should be secret.
It seems more important to present the secret phase.

  $ cp -R base reorder
  $ cd reorder
  $ hg histedit -r 'b449568bf7fc' --commands - << EOF
  > pick b449568bf7fc 11 f
  > pick 3a6c53ee7f3d 15 j
  > pick 6b70183d2492 12 g
  > pick b605fb7503f2 14 i
  > pick 7395e1ff83bd 13 h
  > pick ee118ab9fa44 16 k
  > EOF
  $ hg log -G
  @  23:558246857888 (secret) k
  |
  o  22:28bd44768535 (secret) h
  |
  o  21:d5395202aeb9 (secret) i
  |
  o  20:21edda8e341b (secret) g
  |
  o  19:5ab64f3a4832 (secret) j
  |
  o  13:b449568bf7fc (draft) f
  |
  o  12:40db8afa467b (public) c
  |
  o  0:cb9a9f314b8b (public) a
  
  $ cd ..

Changeset folding
-------------------------------------------

Folding a secret changeset with a draft one turn the result secret (again,
better safe than sorry). Folding between same phase changeset still works

Note that there is a few reordering in this series for more extensive test

  $ cp -R base folding
  $ cd folding
  $ cat >> .hg/hgrc << EOF
  > [phases]
  > new-commit=secret
  > EOF
  $ hg histedit -r 'b449568bf7fc' --commands - << EOF
  > pick 7395e1ff83bd 13 h
  > fold b449568bf7fc 11 f
  > pick 6b70183d2492 12 g
  > fold 3a6c53ee7f3d 15 j
  > pick b605fb7503f2 14 i
  > fold ee118ab9fa44 16 k
  > EOF
  $ hg log -G
  @  27:f9daec13fb98 (secret) i
  |
  o  24:49807617f46a (secret) g
  |
  o  21:050280826e04 (draft) h
  |
  o  12:40db8afa467b (public) c
  |
  o  0:cb9a9f314b8b (public) a
  
  $ hg co 49807617f46a
  0 files updated, 0 files merged, 2 files removed, 0 files unresolved
  $ echo wat >> wat
  $ hg add wat
  $ hg ci -m 'add wat'
  created new head
  $ hg merge f9daec13fb98
  2 files updated, 0 files merged, 0 files removed, 0 files unresolved
  (branch merge, don't forget to commit)
  $ hg ci -m 'merge'
  $ echo not wat > wat
  $ hg ci -m 'modify wat'
  $ hg histedit 050280826e04
  abort: cannot edit history that contains merges
  [255]
  $ cd ..

Check abort behavior
-------------------------------------------

We checks that abort properly clean the repository so the same histedit can be
attempted later.

  $ cp -R base abort
  $ cd abort
  $ hg histedit -r 'b449568bf7fc' --commands - << EOF
  > pick b449568bf7fc 13 f
  > pick 7395e1ff83bd 15 h
  > pick 6b70183d2492 14 g
  > pick b605fb7503f2 16 i
  > roll 3a6c53ee7f3d 17 j
  > edit ee118ab9fa44 18 k
  > EOF
  Editing (ee118ab9fa44), you may commit or record as needed now.
  (hg histedit --continue to resume)
  [1]

  $ hg histedit --abort
  1 files updated, 0 files merged, 0 files removed, 0 files unresolved
  saved backup bundle to $TESTTMP/abort/.hg/strip-backup/4dc06258baa6-dff4ef05-backup.hg (glob)

  $ hg log -G
  @  18:ee118ab9fa44 (secret) k
  |
  o  17:3a6c53ee7f3d (secret) j
  |
  o  16:b605fb7503f2 (secret) i
  |
  o  15:7395e1ff83bd (draft) h
  |
  o  14:6b70183d2492 (draft) g
  |
  o  13:b449568bf7fc (draft) f
  |
  o  12:40db8afa467b (public) c
  |
  o  0:cb9a9f314b8b (public) a
  
  $ hg histedit -r 'b449568bf7fc' --commands - << EOF --config experimental.evolution.track-operation=1
  > pick b449568bf7fc 13 f
  > pick 7395e1ff83bd 15 h
  > pick 6b70183d2492 14 g
  > pick b605fb7503f2 16 i
  > pick 3a6c53ee7f3d 17 j
  > edit ee118ab9fa44 18 k
  > EOF
  Editing (ee118ab9fa44), you may commit or record as needed now.
  (hg histedit --continue to resume)
  [1]
  $ hg histedit --continue --config experimental.evolution.track-operation=1
  $ hg log -G
  @  23:175d6b286a22 (secret) k
  |
  o  22:44ca09d59ae4 (secret) j
  |
  o  21:31747692a644 (secret) i
  |
  o  20:9985cd4f21fa (draft) g
  |
  o  19:4dc06258baa6 (draft) h
  |
  o  13:b449568bf7fc (draft) f
  |
  o  12:40db8afa467b (public) c
  |
  o  0:cb9a9f314b8b (public) a
  
  $ hg debugobsolete --rev .
  ee118ab9fa44ebb86be85996548b5517a39e5093 175d6b286a224c23f192e79a581ce83131a53fa2 0 (*) {'operation': 'histedit', 'user': 'test'} (glob)