annotate tests/test-shelve.t @ 40326:fed697fa1734

sqlitestore: file storage backend using SQLite

This commit provides an extension which uses SQLite to store file
data (as opposed to revlogs).

As the inline documentation describes, there are still several
aspects to the extension that are incomplete. But it's a start.
The extension does support basic clone, checkout, and commit
workflows, which makes it suitable for simple use cases.

One notable missing feature is support for "bundlerepos." This is
probably responsible for the most test failures when the extension
is activated as part of the test suite.

All revision data is stored in SQLite. Data is stored as zstd
compressed chunks (default if zstd is available), zlib compressed
chunks (default if zstd is not available), or raw chunks (if
configured or if a compressed delta is not smaller than the raw
delta). This makes things very similar to revlogs.

Unlike revlogs, the extension doesn't yet enforce a limit on delta
chain length. This is an obvious limitation and should be addressed.
This is somewhat mitigated by the use of zstd, which is much faster
than zlib to decompress.

There is a dedicated table for storing deltas. Deltas are stored
by the SHA-1 hash of their uncompressed content. The "fileindex" table
has columns that reference the delta for each revision and the base
delta that delta should be applied against. A recursive SQL query
is used to resolve the delta chain along with the delta data.

By storing deltas by hash, we are able to de-duplicate delta storage!
With revlogs, the same deltas in different revlogs would result in
duplicate storage of that delta. In this scheme, inserting the
duplicate delta is a no-op and delta chains simply reference the
existing delta.

When initially implementing this extension, I did not have
content-indexed deltas and deltas could be duplicated across files
(just like revlogs). When I implemented content-indexed deltas, the
size of the SQLite database for a full clone of mozilla-unified
dropped:

before: 2,554,261,504 bytes
after:  2,488,754,176 bytes

Surprisingly, this is still larger than the bytes size of revlog
files:

revlog files: 2,104,861,230 bytes
du -b:        2,254,381,614

I would have expected storage to be smaller since we're not limiting
delta chain length and since we're using zstd instead of zlib. I
suspect the SQLite indexes and per-column overhead account for the
bulk of the differences. (Keep in mind that revlog uses a 64-byte
packed struct for revision index data and deltas are stored without
padding. Aside from the 12 unused bytes in the 32 byte node field,
revlogs are pretty efficient.) Another source of overhead is file
name storage. With revlogs, file names are stored in the filesystem.
But with SQLite, we need to store file names in the database. This is
roughly equivalent to the size of the fncache file, which for the
mozilla-unified repository is ~34MB.

Since the SQLite database isn't append-only and since delta chains
can reference any delta, this opens some interesting possibilities.
For example, we could store deltas in reverse, such that fulltexts
are stored for newer revisions and deltas are applied to reconstruct
older revisions. This is likely a more optimal storage strategy for
version control, as new data tends to be more frequently accessed
than old data. We would obviously need wire protocol support for
transferring revision data from newest to oldest. And we would
probably need some kind of mechanism for "re-encoding" stores. But
it should be doable.

This extension is very much experimental quality. There are a handful
of features that don't work. It probably isn't suitable for day-to-day
use. But it could be used in limited cases (e.g. read-only checkouts
like in CI). And it is also a good proving ground for alternate
storage backends. As we continue to define interfaces for all things
storage, it will be useful to have a viable alternate storage backend
to see how things shake out in practice.

test-storage.py passes on Python 2 and introduces no new test failures on
Python 3. Having the storage-level unit tests has proved to be insanely
useful when developing this extension. Those tests caught numerous bugs
during development and I'm convinced this style of testing is the way
forward for ensuring alternate storage backends work as intended. Of
course, test coverage isn't close to what it needs to be. But it is
a start. And what coverage we have gives me confidence that basic store
functionality is implemented properly.

Differential Revision: https://phab.mercurial-scm.org/D4928

#testcases stripbased phasebased

  $ cat <<EOF >> $HGRCPATH
  > [extensions]
  > mq =
  > shelve =
  > [defaults]
  > diff = --nodates --git
  > qnew = --date '0 0'
  > [shelve]
  > maxbackups = 2
  > EOF

#if phasebased

  $ cat <<EOF >> $HGRCPATH
  > [format]
  > internal-phase = yes
  > EOF

#endif

  $ hg init repo
  $ cd repo
  $ mkdir a b
  $ echo a > a/a
  $ echo b > b/b
  $ echo c > c
  $ echo d > d
  $ echo x > x
  $ hg addremove -q

shelve has a help message
  $ hg shelve -h
  hg shelve [OPTION]... [FILE]...
  
  save and set aside changes from the working directory
  
      Shelving takes files that "hg status" reports as not clean, saves the
      modifications to a bundle (a shelved change), and reverts the files so
      that their state in the working directory becomes clean.
  
      To restore these changes to the working directory, using "hg unshelve";
      this will work even if you switch to a different commit.
  
      When no files are specified, "hg shelve" saves all not-clean files. If
      specific files or directories are named, only changes to those files are
      shelved.
  
      In bare shelve (when no files are specified, without interactive, include
      and exclude option), shelving remembers information if the working
      directory was on newly created branch, in other words working directory
      was on different branch than its first parent. In this situation
      unshelving restores branch information to the working directory.
  
      Each shelved change has a name that makes it easier to find later. The
      name of a shelved change defaults to being based on the active bookmark,
      or if there is no active bookmark, the current named branch.  To specify a
      different name, use "--name".
  
      To see a list of existing shelved changes, use the "--list" option. For
      each shelved change, this will print its name, age, and description; use "
      --patch" or "--stat" for more details.
  
      To delete specific shelved changes, use "--delete". To delete all shelved
      changes, use "--cleanup".
  
  (use 'hg help -e shelve' to show help for the shelve extension)
  
  options ([+] can be repeated):
  
   -A --addremove           mark new/missing files as added/removed before
                            shelving
   -u --unknown             store unknown files in the shelve
      --cleanup             delete all shelved changes
      --date DATE           shelve with the specified commit date
   -d --delete              delete the named shelved change(s)
   -e --edit                invoke editor on commit messages
   -l --list                list current shelves
   -m --message TEXT        use text as shelve message
   -n --name NAME           use the given name for the shelved commit
   -p --patch               output patches for changes (provide the names of the
                            shelved changes as positional arguments)
   -i --interactive         interactive mode, only works while creating a shelve
      --stat                output diffstat-style summary of changes (provide
                            the names of the shelved changes as positional
                            arguments)
   -I --include PATTERN [+] include names matching the given patterns
   -X --exclude PATTERN [+] exclude names matching the given patterns
      --mq                  operate on patch repository
  
  (some details hidden, use --verbose to show complete help)

shelving in an empty repo should be possible
(this tests also that editor is not invoked, if '--edit' is not
specified)

  $ HGEDITOR=cat hg shelve
  shelved as default
  0 files updated, 0 files merged, 5 files removed, 0 files unresolved

  $ hg unshelve
  unshelving change 'default'

  $ hg commit -q -m 'initial commit'

  $ hg shelve
  nothing changed
  [1]

make sure shelve files were backed up

  $ ls .hg/shelve-backup
  default.hg
  default.patch
  default.shelve

checks to make sure we dont create a directory or
hidden file while choosing a new shelve name

when we are given a name

  $ hg shelve -n foo/bar
  abort: shelved change names can not contain slashes
  [255]
  $ hg shelve -n .baz
  abort: shelved change names can not start with '.'
  [255]
  $ hg shelve -n foo\\bar
  abort: shelved change names can not contain slashes
  [255]

when shelve has to choose itself

  $ hg branch x/y -q
  $ hg commit -q -m "Branch commit 0"
  $ hg shelve
  nothing changed
  [1]
  $ hg branch .x -q
  $ hg commit -q -m "Branch commit 1"
  $ hg shelve
  nothing changed
  [1]
  $ hg branch x\\y -q
  $ hg commit -q -m "Branch commit 2"
  $ hg shelve
  nothing changed
  [1]

cleaning the branches made for name checking tests

  $ hg up default -q
  $ hg strip e9177275307e+6a6d231f43d+882bae7c62c2 -q

create an mq patch - shelving should work fine with a patch applied

  $ echo n > n
  $ hg add n
  $ hg commit n -m second
  $ hg qnew second.patch

shelve a change that we will delete later

  $ echo a >> a/a
  $ hg shelve
  shelved as default
  1 files updated, 0 files merged, 0 files removed, 0 files unresolved

set up some more complex changes to shelve

  $ echo a >> a/a
  $ hg mv b b.rename
  moving b/b to b.rename/b
  $ hg cp c c.copy
  $ hg status -C
  M a/a
  A b.rename/b
    b/b
  A c.copy
    c
  R b/b

the common case - no options or filenames

  $ hg shelve
  shelved as default-01
  2 files updated, 0 files merged, 2 files removed, 0 files unresolved
  $ hg status -C

ensure that our shelved changes exist

  $ hg shelve -l
  default-01      (*)* changes to: [mq]: second.patch (glob)
  default         (*)* changes to: [mq]: second.patch (glob)

  $ hg shelve -l -p default
  default         (*)* changes to: [mq]: second.patch (glob)
  
  diff --git a/a/a b/a/a
  --- a/a/a
  +++ b/a/a
  @@ -1,1 +1,2 @@
   a
  +a

  $ hg shelve --list --addremove
  abort: options '--list' and '--addremove' may not be used together
  [255]

delete our older shelved change

  $ hg shelve -d default
  $ hg qfinish -a -q

ensure shelve backups aren't overwritten

  $ ls .hg/shelve-backup/
  default-1.hg
  default-1.patch
  default-1.shelve
  default.hg
  default.patch
  default.shelve

local edits should not prevent a shelved change from applying

  $ printf "z\na\n" > a/a
  $ hg unshelve --keep
  unshelving change 'default-01'
  temporarily committing pending changes (restore with 'hg unshelve --abort')
  rebasing shelved changes
  merging a/a

  $ hg revert --all -q
  $ rm a/a.orig b.rename/b c.copy

apply it and make sure our state is as expected

(this also tests that same timestamp prevents backups from being
removed, even though there are more than 'maxbackups' backups)

  $ f -t .hg/shelve-backup/default.patch
  .hg/shelve-backup/default.patch: file
  $ touch -t 200001010000 .hg/shelve-backup/default.patch
  $ f -t .hg/shelve-backup/default-1.patch
  .hg/shelve-backup/default-1.patch: file
  $ touch -t 200001010000 .hg/shelve-backup/default-1.patch

  $ hg unshelve
  unshelving change 'default-01'
  $ hg status -C
  M a/a
  A b.rename/b
    b/b
  A c.copy
    c
  R b/b
  $ hg shelve -l

(both of default.hg and default-1.hg should be still kept, because it
is difficult to decide actual order of them from same timestamp)

  $ ls .hg/shelve-backup/
  default-01.hg
  default-01.patch
  default-01.shelve
  default-1.hg
  default-1.patch
  default-1.shelve
  default.hg
  default.patch
  default.shelve

  $ hg unshelve
  abort: no shelved changes to apply!
  [255]
  $ hg unshelve foo
  abort: shelved change 'foo' not found
  [255]

named shelves, specific filenames, and "commit messages" should all work
(this tests also that editor is invoked, if '--edit' is specified)

  $ hg status -C
  M a/a
  A b.rename/b
    b/b
  A c.copy
    c
  R b/b
  $ HGEDITOR=cat hg shelve -q -n wibble -m wat -e a
  wat
  
  
  HG: Enter commit message.  Lines beginning with 'HG:' are removed.
  HG: Leave message empty to abort commit.
  HG: --
  HG: user: shelve@localhost
  HG: branch 'default'
  HG: changed a/a

expect "a" to no longer be present, but status otherwise unchanged

  $ hg status -C
  A b.rename/b
    b/b
  A c.copy
    c
  R b/b
  $ hg shelve -l --stat
  wibble          (*)    wat (glob)
   a/a |  1 +
   1 files changed, 1 insertions(+), 0 deletions(-)

and now "a/a" should reappear

  $ cd a
  $ hg unshelve -q wibble
  $ cd ..
  $ hg status -C
  M a/a
  A b.rename/b
    b/b
  A c.copy
    c
  R b/b

ensure old shelve backups are being deleted automatically

  $ ls .hg/shelve-backup/
  default-01.hg
  default-01.patch
  default-01.shelve
  wibble.hg
  wibble.patch
  wibble.shelve

cause unshelving to result in a merge with 'a' conflicting

  $ hg shelve -q
  $ echo c>>a/a
  $ hg commit -m second
  $ hg tip --template '{files}\n'
  a/a

add an unrelated change that should be preserved

  $ mkdir foo
  $ echo foo > foo/foo
  $ hg add foo/foo

force a conflicted merge to occur

  $ hg unshelve
  unshelving change 'default'
  temporarily committing pending changes (restore with 'hg unshelve --abort')
  rebasing shelved changes
  merging a/a
  warning: conflicts while merging a/a! (edit, then use 'hg resolve --mark')
  unresolved conflicts (see 'hg resolve', then 'hg unshelve --continue')
  [1]
  $ hg status -v
  M a/a
  M b.rename/b
  M c.copy
  R b/b
  ? a/a.orig
  # The repository is in an unfinished *unshelve* state.
  
  # Unresolved merge conflicts:
  # 
  #     a/a
  # 
  # To mark files as resolved:  hg resolve --mark FILE
  
  # To continue:    hg unshelve --continue
  # To abort:       hg unshelve --abort
  

ensure that we have a merge with unresolved conflicts

#if phasebased
  $ hg heads -q --template '{rev}\n'
  8
  5
  $ hg parents -q --template '{rev}\n'
  8
  5
#endif

#if stripbased
  $ hg heads -q --template '{rev}\n'
  5
  4
  $ hg parents -q --template '{rev}\n'
  4
  5
#endif

  $ hg status
  M a/a
  M b.rename/b
  M c.copy
  R b/b
  ? a/a.orig
  $ hg diff
  diff --git a/a/a b/a/a
  --- a/a/a
  +++ b/a/a
  @@ -1,2 +1,6 @@
   a
  +<<<<<<< shelve:       2377350b6337 - shelve: pending changes temporary commit
   c
  +=======
  +a
  +>>>>>>> working-copy: a68ec3400638 - shelve: changes to: [mq]: second.patch
  diff --git a/b/b b/b.rename/b
  rename from b/b
  rename to b.rename/b
  diff --git a/c b/c.copy
  copy from c
  copy to c.copy
  $ hg resolve -l
  U a/a

  $ hg shelve
  abort: unshelve already in progress
  (use 'hg unshelve --continue' or 'hg unshelve --abort')
  [255]

abort the unshelve and be happy

  $ hg status
  M a/a
  M b.rename/b
  M c.copy
  R b/b
  ? a/a.orig
  $ hg unshelve -a
  unshelve of 'default' aborted
  $ hg heads -q
  [37]:2e69b451d1ea (re)
  $ hg parents
  changeset:   [37]:2e69b451d1ea (re)
  tag:         tip
  parent:      3:509104101065 (?)
  user:        test
  date:        Thu Jan 01 00:00:00 1970 +0000
  summary:     second
  
  $ hg resolve -l
  $ hg status
  A foo/foo
  ? a/a.orig

try to continue with no unshelve underway

  $ hg unshelve -c
  abort: no unshelve in progress
  [255]
  $ hg status
  A foo/foo
  ? a/a.orig

redo the unshelve to get a conflict

  $ hg unshelve -q
  warning: conflicts while merging a/a! (edit, then use 'hg resolve --mark')
  unresolved conflicts (see 'hg resolve', then 'hg unshelve --continue')
  [1]

attempt to continue

  $ hg unshelve -c
  abort: unresolved conflicts, can't continue
  (see 'hg resolve', then 'hg unshelve --continue')
  [255]

  $ hg revert -r . a/a
  $ hg resolve -m a/a
  (no more unresolved files)
  continue: hg unshelve --continue

  $ hg commit -m 'commit while unshelve in progress'
  abort: unshelve already in progress
  (use 'hg unshelve --continue' or 'hg unshelve --abort')
  [255]

  $ hg graft --continue
  abort: no graft in progress
  (continue: hg unshelve --continue)
  [255]
  $ hg unshelve -c
  unshelve of 'default' complete

ensure the repo is as we hope

  $ hg parents
  changeset:   [37]:2e69b451d1ea (re)
  tag:         tip
  parent:      3:509104101065 (?)
  user:        test
  date:        Thu Jan 01 00:00:00 1970 +0000
  summary:     second
  
  $ hg heads -q
  [37]:2e69b451d1ea (re)

  $ hg status -C
  A b.rename/b
    b/b
  A c.copy
    c
  A foo/foo
  R b/b
  ? a/a.orig

there should be no shelves left

  $ hg shelve -l

#if execbit

ensure that metadata-only changes are shelved

  $ chmod +x a/a
  $ hg shelve -q -n execbit a/a
  $ hg status a/a
  $ hg unshelve -q execbit
  $ hg status a/a
  M a/a
  $ hg revert a/a

#else

Dummy shelve op, to keep rev numbers aligned

  $ echo foo > a/a
  $ hg shelve -q -n dummy a/a
  $ hg unshelve -q dummy
  $ hg revert a/a

#endif

#if symlink

  $ rm a/a
  $ ln -s foo a/a
  $ hg shelve -q -n symlink a/a
  $ hg status a/a
  $ hg unshelve -q -n symlink
  $ hg status a/a
  M a/a
  $ hg revert a/a

#else

Dummy shelve op, to keep rev numbers aligned

  $ echo bar > a/a
  $ hg shelve -q -n dummy a/a
  $ hg unshelve -q dummy
  $ hg revert a/a

#endif

set up another conflict between a commit and a shelved change

  $ hg revert -q -C -a
  $ rm a/a.orig b.rename/b c.copy
  $ echo a >> a/a
  $ hg shelve -q
  $ echo x >> a/a
  $ hg ci -m 'create conflict'
  $ hg add foo/foo

if we resolve a conflict while unshelving, the unshelve should succeed

  $ hg unshelve --tool :merge-other --keep
  unshelving change 'default'
  temporarily committing pending changes (restore with 'hg unshelve --abort')
  rebasing shelved changes
  merging a/a
  $ hg parents -q
  (4|13):33f7f61e6c5e (re)
  $ hg shelve -l
  default         (*)* changes to: second (glob)
  $ hg status
  M a/a
  A foo/foo
  $ cat a/a
  a
  c
  a
  $ cat > a/a << EOF
  > a
  > c
  > x
  > EOF

  $ HGMERGE=true hg unshelve
  unshelving change 'default'
  temporarily committing pending changes (restore with 'hg unshelve --abort')
  rebasing shelved changes
  merging a/a
  note: unshelved changes already existed in the working copy
  $ hg parents -q
  (4|13):33f7f61e6c5e (re)
  $ hg shelve -l
  $ hg status
  A foo/foo
  $ cat a/a
  a
  c
  x

test keep and cleanup

  $ hg shelve
  shelved as default
  0 files updated, 0 files merged, 1 files removed, 0 files unresolved
  $ hg shelve --list
  default         (*)* changes to: create conflict (glob)
  $ hg unshelve -k
  unshelving change 'default'
  $ hg shelve --list
  default         (*)* changes to: create conflict (glob)
  $ hg shelve --cleanup
  $ hg shelve --list

  $ hg shelve --cleanup --delete
  abort: options '--cleanup' and '--delete' may not be used together
  [255]
  $ hg shelve --cleanup --patch
  abort: options '--cleanup' and '--patch' may not be used together
  [255]
  $ hg shelve --cleanup --message MESSAGE
  abort: options '--cleanup' and '--message' may not be used together
  [255]

test bookmarks

  $ hg bookmark test
  $ hg bookmark
   \* test                      (4|13):33f7f61e6c5e (re)
  $ hg shelve
  shelved as test
  0 files updated, 0 files merged, 1 files removed, 0 files unresolved
  $ hg bookmark
   \* test                      (4|13):33f7f61e6c5e (re)
  $ hg unshelve
  unshelving change 'test'
  $ hg bookmark
   \* test                      (4|13):33f7f61e6c5e (re)

shelve should still work even if mq is disabled

  $ hg --config extensions.mq=! shelve
  shelved as test
  0 files updated, 0 files merged, 1 files removed, 0 files unresolved
  $ hg --config extensions.mq=! shelve --list
  test            (*)* changes to: create conflict (glob)
  $ hg bookmark
   \* test                      (4|13):33f7f61e6c5e (re)
  $ hg --config extensions.mq=! unshelve
  unshelving change 'test'
  $ hg bookmark
   \* test                      (4|13):33f7f61e6c5e (re)

shelve should leave dirstate clean (issue4055)

  $ cd ..
  $ hg init shelverebase
  $ cd shelverebase
  $ printf 'x\ny\n' > x
  $ echo z > z
  $ hg commit -Aqm xy
  $ echo z >> x
  $ hg commit -Aqm z
  $ hg up 5c4c67fb7dce
  1 files updated, 0 files merged, 0 files removed, 0 files unresolved
  $ printf 'a\nx\ny\nz\n' > x
  $ hg commit -Aqm xyz
  $ echo c >> z
  $ hg shelve
  shelved as default
  1 files updated, 0 files merged, 0 files removed, 0 files unresolved

  $ hg rebase -d 6c103be8f4e4 --config extensions.rebase=
  rebasing 2:323bfa07f744 "xyz"( \(tip\))? (re)
  merging x
  saved backup bundle to \$TESTTMP/shelverebase/.hg/strip-backup/323bfa07f744-(78114325|7ae538ef)-rebase.hg (re)
  $ hg unshelve
  unshelving change 'default'
  rebasing shelved changes
  $ hg status
  M z

  $ cd ..

shelve should only unshelve pending changes (issue4068)

  $ hg init onlypendingchanges
  $ cd onlypendingchanges
  $ touch a
  $ hg ci -Aqm a
  $ touch b
  $ hg ci -Aqm b
  $ hg up -q 3903775176ed
  $ touch c
  $ hg ci -Aqm c

  $ touch d
  $ hg add d
  $ hg shelve
  shelved as default
  0 files updated, 0 files merged, 1 files removed, 0 files unresolved
  $ hg up -q 0e067c57feba
  $ hg unshelve
  unshelving change 'default'
  rebasing shelved changes
  $ hg status
  A d

unshelve should work on an ancestor of the original commit

  $ hg shelve
  shelved as default
  0 files updated, 0 files merged, 1 files removed, 0 files unresolved
  $ hg up 3903775176ed
  0 files updated, 0 files merged, 1 files removed, 0 files unresolved
  $ hg unshelve
  unshelving change 'default'
  rebasing shelved changes
  $ hg status
  A d

test bug 4073 we need to enable obsolete markers for it

  $ cat >> $HGRCPATH << EOF
  > [experimental]
  > evolution.createmarkers=True
  > EOF
  $ hg shelve
  shelved as default
  0 files updated, 0 files merged, 1 files removed, 0 files unresolved
  $ hg debugobsolete `hg log -r 0e067c57feba -T '{node}'`
  obsoleted 1 changesets
  $ hg unshelve
  unshelving change 'default'

unshelve should leave unknown files alone (issue4113)

  $ echo e > e
  $ hg shelve
  shelved as default
  0 files updated, 0 files merged, 1 files removed, 0 files unresolved
  $ hg status
  ? e
  $ hg unshelve
  unshelving change 'default'
  $ hg status
  A d
  ? e
  $ cat e
  e

unshelve should keep a copy of unknown files

  $ hg add e
  $ hg shelve
  shelved as default
  0 files updated, 0 files merged, 2 files removed, 0 files unresolved
  $ echo z > e
  $ hg unshelve
  unshelving change 'default'
  $ cat e
  e
  $ cat e.orig
  z


unshelve and conflicts with tracked and untracked files

 preparing:

  $ rm *.orig
  $ hg ci -qm 'commit stuff'
  $ hg phase -p null:

 no other changes - no merge:

  $ echo f > f
  $ hg add f
  $ hg shelve
  shelved as default
  0 files updated, 0 files merged, 1 files removed, 0 files unresolved
  $ echo g > f
  $ hg unshelve
  unshelving change 'default'
  $ hg st
  A f
  ? f.orig
  $ cat f
  f
  $ cat f.orig
  g

 other uncommitted changes - merge:

  $ hg st
  A f
  ? f.orig
  $ hg shelve
  shelved as default
  0 files updated, 0 files merged, 1 files removed, 0 files unresolved
#if repobundlerepo
  $ hg log -G --template '{rev}  {desc|firstline}  {author}' -R bundle://.hg/shelved/default.hg -r 'bundle()' --hidden
  o  [48]  changes to: commit stuff  shelve@localhost (re)
  |
  ~
#endif
  $ hg log -G --template '{rev}  {desc|firstline}  {author}'
  @  [37]  commit stuff  test (re)
  |
  | o  2  c  test
  |/
  o  0  a  test
  
  $ mv f.orig f
  $ echo 1 > a
  $ hg unshelve --date '1073741824 0'
  unshelving change 'default'
  temporarily committing pending changes (restore with 'hg unshelve --abort')
  rebasing shelved changes
  merging f
  warning: conflicts while merging f! (edit, then use 'hg resolve --mark')
  unresolved conflicts (see 'hg resolve', then 'hg unshelve --continue')
  [1]

#if phasebased
  $ hg log -G --template '{rev}  {desc|firstline}  {author}  {date|isodate}'
  @  9  pending changes temporary commit  shelve@localhost  2004-01-10 13:37 +0000
  |
  | @  8  changes to: commit stuff  shelve@localhost  1970-01-01 00:00 +0000
  |/
  o  7  commit stuff  test  1970-01-01 00:00 +0000
  |
  | o  2  c  test  1970-01-01 00:00 +0000
  |/
  o  0  a  test  1970-01-01 00:00 +0000
  
#endif

#if stripbased
  $ hg log -G --template '{rev}  {desc|firstline}  {author}  {date|isodate}'
  @  5  changes to: commit stuff  shelve@localhost  1970-01-01 00:00 +0000
  |
  | @  4  pending changes temporary commit  shelve@localhost  2004-01-10 13:37 +0000
  |/
  o  3  commit stuff  test  1970-01-01 00:00 +0000
  |
  | o  2  c  test  1970-01-01 00:00 +0000
  |/
  o  0  a  test  1970-01-01 00:00 +0000
  
#endif

  $ hg st
  M f
  ? f.orig
  $ cat f
  <<<<<<< shelve:       d44eae5c3d33 - shelve: pending changes temporary commit
  g
  =======
  f
  >>>>>>> working-copy: aef214a5229c - shelve: changes to: commit stuff
  $ cat f.orig
  g
  $ hg unshelve --abort -t false
  tool option will be ignored
  unshelve of 'default' aborted
  $ hg st
  M a
  ? f.orig
  $ cat f.orig
  g
  $ hg unshelve
  unshelving change 'default'
  temporarily committing pending changes (restore with 'hg unshelve --abort')
  rebasing shelved changes
  $ hg st
  M a
  A f
  ? f.orig

 other committed changes - merge:

  $ hg shelve f
  shelved as default
  0 files updated, 0 files merged, 1 files removed, 0 files unresolved
  $ hg ci a -m 'intermediate other change'
  $ mv f.orig f
  $ hg unshelve
  unshelving change 'default'
  rebasing shelved changes
  merging f
  warning: conflicts while merging f! (edit, then use 'hg resolve --mark')
  unresolved conflicts (see 'hg resolve', then 'hg unshelve --continue')
  [1]
  $ hg st
  M f
  ? f.orig
  $ cat f
  <<<<<<< shelve:       6b563750f973 - test: intermediate other change
  g
  =======
  f
  >>>>>>> working-copy: aef214a5229c - shelve: changes to: commit stuff
  $ cat f.orig
  g
  $ hg unshelve --abort
  unshelve of 'default' aborted
  $ hg st
  ? f.orig
  $ cat f.orig
  g
  $ hg shelve --delete default

Recreate some conflict again

  $ cd ../repo
  $ hg up -C -r 2e69b451d1ea
  1 files updated, 0 files merged, 0 files removed, 0 files unresolved
  (leaving bookmark test)
  $ echo y >> a/a
  $ hg shelve
  shelved as default
  1 files updated, 0 files merged, 0 files removed, 0 files unresolved
  $ hg up test
  1 files updated, 0 files merged, 0 files removed, 0 files unresolved
  (activating bookmark test)
  $ hg bookmark
   \* test                      (4|13):33f7f61e6c5e (re)
  $ hg unshelve
  unshelving change 'default'
  rebasing shelved changes
  merging a/a
  warning: conflicts while merging a/a! (edit, then use 'hg resolve --mark')
  unresolved conflicts (see 'hg resolve', then 'hg unshelve --continue')
  [1]
  $ hg bookmark
     test                      (4|13):33f7f61e6c5e (re)

Test that resolving all conflicts in one direction (so that the rebase
is a no-op), works (issue4398)

  $ hg revert -a -r .
  reverting a/a
  $ hg resolve -m a/a
  (no more unresolved files)
  continue: hg unshelve --continue
  $ hg unshelve -c
  note: unshelved changes already existed in the working copy
  unshelve of 'default' complete
  $ hg bookmark
   \* test                      (4|13):33f7f61e6c5e (re)
  $ hg diff
  $ hg status
  ? a/a.orig
  ? foo/foo
  $ hg summary
  parent: (4|13):33f7f61e6c5e tip (re)
   create conflict
  branch: default
  bookmarks: *test
  commit: 2 unknown (clean)
  update: (current)
  phases: 5 draft

  $ hg shelve --delete --stat
  abort: options '--delete' and '--stat' may not be used together
  [255]
  $ hg shelve --delete --name NAME
  abort: options '--delete' and '--name' may not be used together
  [255]

Test interactive shelve
  $ cat <<EOF >> $HGRCPATH
  > [ui]
  > interactive = true
  > EOF
  $ echo 'a' >> a/b
  $ cat a/a >> a/b
  $ echo 'x' >> a/b
  $ mv a/b a/a
  $ echo 'a' >> foo/foo
  $ hg st
  M a/a
  ? a/a.orig
  ? foo/foo
  $ cat a/a
  a
  a
  c
  x
  x
  $ cat foo/foo
  foo
  a
  $ hg shelve --interactive --config ui.interactive=false
  abort: running non-interactively
  [255]
  $ hg shelve --interactive << EOF
  > y
  > y
  > n
  > EOF
  diff --git a/a/a b/a/a
  2 hunks, 2 lines changed
  examine changes to 'a/a'? [Ynesfdaq?] y
  
  @@ -1,3 +1,4 @@
  +a
   a
   c
   x
  record change 1/2 to 'a/a'? [Ynesfdaq?] y
  
  @@ -1,3 +2,4 @@
   a
   c
   x
  +x
  record change 2/2 to 'a/a'? [Ynesfdaq?] n
  
  shelved as test
  merging a/a
  0 files updated, 1 files merged, 0 files removed, 0 files unresolved
  $ cat a/a
  a
  c
  x
  x
  $ cat foo/foo
  foo
  a
  $ hg st
  M a/a
  ? foo/foo
  $ hg bookmark
   \* test                      (4|13):33f7f61e6c5e (re)
  $ hg unshelve
  unshelving change 'test'
  temporarily committing pending changes (restore with 'hg unshelve --abort')
  rebasing shelved changes
  merging a/a
  $ hg bookmark
   \* test                      (4|13):33f7f61e6c5e (re)
  $ cat a/a
  a
  a
  c
  x
  x

shelve --patch and shelve --stat should work with valid shelfnames

  $ hg up --clean .
  1 files updated, 0 files merged, 0 files removed, 0 files unresolved
  (leaving bookmark test)
  $ hg shelve --list
  $ echo 'patch a' > shelf-patch-a
  $ hg add shelf-patch-a
  $ hg shelve
  shelved as default
  0 files updated, 0 files merged, 1 files removed, 0 files unresolved
  $ echo 'patch b' > shelf-patch-b
  $ hg add shelf-patch-b
  $ hg shelve
  shelved as default-01
  0 files updated, 0 files merged, 1 files removed, 0 files unresolved
  $ hg shelve --patch default default-01
  default-01      (*)* changes to: create conflict (glob)
  
  diff --git a/shelf-patch-b b/shelf-patch-b
  new file mode 100644
  --- /dev/null
  +++ b/shelf-patch-b
  @@ -0,0 +1,1 @@
  +patch b
  default         (*)* changes to: create conflict (glob)
  
  diff --git a/shelf-patch-a b/shelf-patch-a
  new file mode 100644
  --- /dev/null
  +++ b/shelf-patch-a
  @@ -0,0 +1,1 @@
  +patch a
  $ hg shelve --stat default default-01
  default-01      (*)* changes to: create conflict (glob)
   shelf-patch-b |  1 +
   1 files changed, 1 insertions(+), 0 deletions(-)
  default         (*)* changes to: create conflict (glob)
   shelf-patch-a |  1 +
   1 files changed, 1 insertions(+), 0 deletions(-)
  $ hg shelve --patch default
  default         (*)* changes to: create conflict (glob)
  
  diff --git a/shelf-patch-a b/shelf-patch-a
  new file mode 100644
  --- /dev/null
  +++ b/shelf-patch-a
  @@ -0,0 +1,1 @@
  +patch a
  $ hg shelve --stat default
  default         (*)* changes to: create conflict (glob)
   shelf-patch-a |  1 +
   1 files changed, 1 insertions(+), 0 deletions(-)
  $ hg shelve --patch nonexistentshelf
  abort: cannot find shelf nonexistentshelf
  [255]
  $ hg shelve --stat nonexistentshelf
  abort: cannot find shelf nonexistentshelf
  [255]
  $ hg shelve --patch default nonexistentshelf
  abort: cannot find shelf nonexistentshelf
  [255]

when the user asks for a patch, we assume they want the most recent shelve if
they don't provide a shelve name

  $ hg shelve --patch
  default-01      (*)* changes to: create conflict (glob)
  
  diff --git a/shelf-patch-b b/shelf-patch-b
  new file mode 100644
  --- /dev/null
  +++ b/shelf-patch-b
  @@ -0,0 +1,1 @@
  +patch b

  $ cd ..

you shouldn't be able to ask for the patch/stats of the most recent shelve if
there are no shelves

  $ hg init noshelves
  $ cd noshelves

  $ hg shelve --patch
  abort: there are no shelves to show
  [255]
  $ hg shelve --stat
  abort: there are no shelves to show
  [255]

  $ cd ..

Shelve from general delta repo uses bundle2 on disk
--------------------------------------------------

no general delta

  $ hg clone --pull repo bundle1 --config format.usegeneraldelta=0
  requesting all changes
  adding changesets
  adding manifests
  adding file changes
  added 5 changesets with 8 changes to 6 files
  new changesets cc01e2b0c59f:33f7f61e6c5e
  updating to branch default
  6 files updated, 0 files merged, 0 files removed, 0 files unresolved
  $ cd bundle1
  $ echo babar > jungle
  $ hg add jungle
  $ hg shelve
  shelved as default
  0 files updated, 0 files merged, 1 files removed, 0 files unresolved
  $ hg debugbundle .hg/shelved/*.hg
  330882a04d2ce8487636b1fb292e5beea77fa1e3
  $ cd ..

with general delta

  $ hg clone --pull repo bundle2 --config format.usegeneraldelta=1
  requesting all changes
  adding changesets
  adding manifests
  adding file changes
  added 5 changesets with 8 changes to 6 files
  new changesets cc01e2b0c59f:33f7f61e6c5e
  updating to branch default
  6 files updated, 0 files merged, 0 files removed, 0 files unresolved
  $ cd bundle2
  $ echo babar > jungle
  $ hg add jungle
  $ hg shelve
  shelved as default
  0 files updated, 0 files merged, 1 files removed, 0 files unresolved
  $ hg debugbundle .hg/shelved/*.hg
  Stream params: {Compression: BZ}
  changegroup -- {nbchanges: 1, version: 02} (mandatory: True)
      330882a04d2ce8487636b1fb292e5beea77fa1e3
  $ cd ..

Test visibility of in-memory changes inside transaction to external hook
------------------------------------------------------------------------

  $ cd repo

  $ echo xxxx >> x
  $ hg commit -m "#5: changes to invoke rebase"

  $ cat > $TESTTMP/checkvisibility.sh <<EOF
  > echo "==== \$1:"
  > hg parents --template "VISIBLE {rev}:{node|short}\n"
  > # test that pending changes are hidden
  > unset HG_PENDING
  > hg parents --template "ACTUAL  {rev}:{node|short}\n"
  > echo "===="
  > EOF

  $ cat >> .hg/hgrc <<EOF
  > [defaults]
  > # to fix hash id of temporary revisions
  > unshelve = --date '0 0'
  > EOF

"hg unshelve" at REV5 implies steps below:

(1) commit changes in the working directory (REV6)
(2) unbundle shelved revision (REV7)
(3) rebase: merge REV7 into REV6 (REV6 => REV6, REV7)
(4) rebase: commit merged revision (REV8)
(5) rebase: update to REV6 (REV8 => REV6)
(6) update to REV5 (REV6 => REV5)
(7) abort transaction

== test visibility to external preupdate hook

  $ cat >> .hg/hgrc <<EOF
  > [hooks]
  > preupdate.visibility = sh $TESTTMP/checkvisibility.sh preupdate
  > EOF

  $ echo nnnn >> n

  $ sh $TESTTMP/checkvisibility.sh before-unshelving
  ==== before-unshelving:
  VISIBLE (5|19):703117a2acfb (re)
  ACTUAL  (5|19):703117a2acfb (re)
  ====

  $ hg unshelve --keep default
  temporarily committing pending changes (restore with 'hg unshelve --abort')
  rebasing shelved changes
  ==== preupdate:
  VISIBLE (6|20):54c00d20fb3f (re)
  ACTUAL  (5|19):703117a2acfb (re)
  ====
  ==== preupdate:
  VISIBLE (8|21):8efe6f7537dc (re)
  ACTUAL  (5|19):703117a2acfb (re)
  ====
  ==== preupdate:
  VISIBLE (6|20):54c00d20fb3f (re)
  ACTUAL  (5|19):703117a2acfb (re)
  ====

  $ cat >> .hg/hgrc <<EOF
  > [hooks]
  > preupdate.visibility =
  > EOF

  $ sh $TESTTMP/checkvisibility.sh after-unshelving
  ==== after-unshelving:
  VISIBLE (5|19):703117a2acfb (re)
  ACTUAL  (5|19):703117a2acfb (re)
  ====

== test visibility to external update hook

  $ hg update -q -C 703117a2acfb

  $ cat >> .hg/hgrc <<EOF
  > [hooks]
  > update.visibility = sh $TESTTMP/checkvisibility.sh update
  > EOF

  $ echo nnnn >> n

  $ sh $TESTTMP/checkvisibility.sh before-unshelving
  ==== before-unshelving:
  VISIBLE (5|19):703117a2acfb (re)
  ACTUAL  (5|19):703117a2acfb (re)
  ====

  $ hg unshelve --keep default
  temporarily committing pending changes (restore with 'hg unshelve --abort')
  rebasing shelved changes
  ==== update:
  VISIBLE (6|20):54c00d20fb3f (re)
  VISIBLE 1?7:492ed9d705e5 (re)
  ACTUAL  (5|19):703117a2acfb (re)
  ====
  ==== update:
  VISIBLE (6|20):54c00d20fb3f (re)
  ACTUAL  (5|19):703117a2acfb (re)
  ====
  ==== update:
  VISIBLE (5|19):703117a2acfb (re)
  ACTUAL  (5|19):703117a2acfb (re)
  ====

  $ cat >> .hg/hgrc <<EOF
  > [hooks]
  > update.visibility =
  > EOF

  $ sh $TESTTMP/checkvisibility.sh after-unshelving
  ==== after-unshelving:
  VISIBLE (5|19):703117a2acfb (re)
  ACTUAL  (5|19):703117a2acfb (re)
  ====

  $ cd ..

test .orig files go where the user wants them to
---------------------------------------------------------------
  $ hg init salvage
  $ cd salvage
  $ echo 'content' > root
  $ hg commit -A -m 'root' -q
  $ echo '' > root
  $ hg shelve -q
  $ echo 'contADDent' > root
  $ hg unshelve -q --config 'ui.origbackuppath=.hg/origbackups'
  warning: conflicts while merging root! (edit, then use 'hg resolve --mark')
  unresolved conflicts (see 'hg resolve', then 'hg unshelve --continue')
  [1]
  $ ls .hg/origbackups
  root
  $ rm -rf .hg/origbackups

test Abort unshelve always gets user out of the unshelved state
---------------------------------------------------------------

with a corrupted shelve state file
  $ sed 's/ae8c668541e8/123456789012/' .hg/shelvedstate > ../corrupt-shelvedstate
  $ mv ../corrupt-shelvedstate .hg/shelvestate
  $ hg unshelve --abort 2>&1 | grep 'aborted'
  unshelve of 'default' aborted
  $ hg summary
  parent: 0:ae8c668541e8 tip
   root
  branch: default
  commit: 1 modified
  update: (current)
  phases: 1 draft
  $ hg up -C .
  1 files updated, 0 files merged, 0 files removed, 0 files unresolved

  $ cd ..

Keep active bookmark while (un)shelving even on shared repo (issue4940)
-----------------------------------------------------------------------

  $ cat <<EOF >> $HGRCPATH
  > [extensions]
  > share =
  > EOF

  $ hg bookmarks -R repo
     test                      (4|13):33f7f61e6c5e (re)
  $ hg share -B repo share
  updating working directory
  6 files updated, 0 files merged, 0 files removed, 0 files unresolved
  $ cd share

  $ hg bookmarks
     test                      (4|13):33f7f61e6c5e (re)
  $ hg bookmarks foo
  $ hg bookmarks
   \* foo                       (5|19):703117a2acfb (re)
     test                      (4|13):33f7f61e6c5e (re)
  $ echo x >> x
  $ hg shelve
  shelved as foo
  1 files updated, 0 files merged, 0 files removed, 0 files unresolved
  $ hg bookmarks
   \* foo                       (5|19):703117a2acfb (re)
     test                      (4|13):33f7f61e6c5e (re)

  $ hg unshelve
  unshelving change 'foo'
  $ hg bookmarks
   \* foo                       (5|19):703117a2acfb (re)
     test                      (4|13):33f7f61e6c5e (re)

  $ cd ..

Shelve and unshelve unknown files. For the purposes of unshelve, a shelved
unknown file is the same as a shelved added file, except that it will be in
unknown state after unshelve if and only if it was either absent or unknown
before the unshelve operation.

  $ hg init unknowns
  $ cd unknowns

The simplest case is if I simply have an unknown file that I shelve and unshelve

  $ echo unknown > unknown
  $ hg status
  ? unknown
  $ hg shelve --unknown
  shelved as default
  0 files updated, 0 files merged, 1 files removed, 0 files unresolved
  $ hg status
  $ hg unshelve
  unshelving change 'default'
  $ hg status
  ? unknown
  $ rm unknown

If I shelve, add the file, and unshelve, does it stay added?

  $ echo unknown > unknown
  $ hg shelve -u
  shelved as default
  0 files updated, 0 files merged, 1 files removed, 0 files unresolved
  $ hg status
  $ touch unknown
  $ hg add unknown
  $ hg status
  A unknown
  $ hg unshelve
  unshelving change 'default'
  temporarily committing pending changes (restore with 'hg unshelve --abort')
  rebasing shelved changes
  merging unknown
  $ hg status
  A unknown
  $ hg forget unknown
  $ rm unknown

And if I shelve, commit, then unshelve, does it become modified?

  $ echo unknown > unknown
  $ hg shelve -u
  shelved as default
  0 files updated, 0 files merged, 1 files removed, 0 files unresolved
  $ hg status
  $ touch unknown
  $ hg add unknown
  $ hg commit -qm "Add unknown"
  $ hg status
  $ hg unshelve
  unshelving change 'default'
  rebasing shelved changes
  merging unknown
  $ hg status
  M unknown
  $ hg remove --force unknown
  $ hg commit -qm "Remove unknown"

  $ cd ..

We expects that non-bare shelve keeps newly created branch in
working directory.

  $ hg init shelve-preserve-new-branch
  $ cd shelve-preserve-new-branch
  $ echo "a" >> a
  $ hg add a
  $ echo "b" >> b
  $ hg add b
  $ hg commit -m "ab"
  $ echo "aa" >> a
  $ echo "bb" >> b
  $ hg branch new-branch
  marked working directory as branch new-branch
  (branches are permanent and global, did you want a bookmark?)
  $ hg status
  M a
  M b
  $ hg branch
  new-branch
  $ hg shelve a
  shelved as default
  1 files updated, 0 files merged, 0 files removed, 0 files unresolved
  $ hg branch
  new-branch
  $ hg status
  M b
  $ touch "c" >> c
  $ hg add c
  $ hg status
  M b
  A c
  $ hg shelve --exclude c
  shelved as default-01
  1 files updated, 0 files merged, 0 files removed, 0 files unresolved
  $ hg branch
  new-branch
  $ hg status
  A c
  $ hg shelve --include c
  shelved as default-02
  0 files updated, 0 files merged, 1 files removed, 0 files unresolved
  $ hg branch
  new-branch
  $ hg status
  $ echo "d" >> d
  $ hg add d
  $ hg status
  A d

We expect that bare-shelve will not keep branch in current working directory.

  $ hg shelve
  shelved as default-03
  0 files updated, 0 files merged, 1 files removed, 0 files unresolved
  $ hg branch
  default
  $ cd ..

When i shelve commit on newly created branch i expect
that after unshelve newly created branch will be preserved.

  $ hg init shelve_on_new_branch_simple
  $ cd shelve_on_new_branch_simple
  $ echo "aaa" >> a
  $ hg commit -A -m "a"
  adding a
  $ hg branch
  default
  $ hg branch test
  marked working directory as branch test
  (branches are permanent and global, did you want a bookmark?)
  $ echo "bbb" >> a
  $ hg status
  M a
  $ hg shelve
  shelved as default
  1 files updated, 0 files merged, 0 files removed, 0 files unresolved
  $ hg branch
  default
  $ echo "bbb" >> b
  $ hg status
  ? b
  $ hg unshelve
  unshelving change 'default'
  marked working directory as branch test
  $ hg status
  M a
  ? b
  $ hg branch
  test
  $ cd ..

When i shelve commit on newly created branch, make
some changes, unshelve it and running into merge
conflicts i expect that after fixing them and
running unshelve --continue newly created branch
will be preserved.

  $ hg init shelve_on_new_branch_conflict
  $ cd shelve_on_new_branch_conflict
  $ echo "aaa" >> a
  $ hg commit -A -m "a"
  adding a
  $ hg branch
  default
  $ hg branch test
  marked working directory as branch test
  (branches are permanent and global, did you want a bookmark?)
  $ echo "bbb" >> a
  $ hg status
  M a
  $ hg shelve
  shelved as default
  1 files updated, 0 files merged, 0 files removed, 0 files unresolved
  $ hg branch
  default
  $ echo "ccc" >> a
  $ hg status
  M a
  $ hg unshelve
  unshelving change 'default'
  temporarily committing pending changes (restore with 'hg unshelve --abort')
  rebasing shelved changes
  merging a
  warning: conflicts while merging a! (edit, then use 'hg resolve --mark')
  unresolved conflicts (see 'hg resolve', then 'hg unshelve --continue')
  [1]
  $ echo "aaabbbccc" > a
  $ rm a.orig
  $ hg resolve --mark a
  (no more unresolved files)
  continue: hg unshelve --continue
  $ hg unshelve --continue
  marked working directory as branch test
  unshelve of 'default' complete
  $ cat a
  aaabbbccc
  $ hg status
  M a
  $ hg branch
  test
  $ hg commit -m "test-commit"

When i shelve on test branch, update to default branch
and unshelve i expect that it will not preserve previous
test branch.

  $ echo "xxx" > b
  $ hg add b
  $ hg shelve
  shelved as test
  0 files updated, 0 files merged, 1 files removed, 0 files unresolved
  $ hg update -r 7049e48789d7
  1 files updated, 0 files merged, 0 files removed, 0 files unresolved
  $ hg unshelve
  unshelving change 'test'
  rebasing shelved changes
  $ hg status
  A b
  $ hg branch
  default
  $ cd ..

When i unshelve resulting in merge conflicts and makes saved
file shelvedstate looks like in previous versions in
mercurial(without restore branch information in 7th line) i
expect that after resolving conflicts and successfully
running 'shelve --continue' the branch information won't be
restored and branch will be unchanged.

shelve on new branch, conflict with previous shelvedstate

  $ hg init conflict
  $ cd conflict
  $ echo "aaa" >> a
  $ hg commit -A -m "a"
  adding a
  $ hg branch
  default
  $ hg branch test
  marked working directory as branch test
  (branches are permanent and global, did you want a bookmark?)
  $ echo "bbb" >> a
  $ hg status
  M a
  $ hg shelve
  shelved as default
  1 files updated, 0 files merged, 0 files removed, 0 files unresolved
  $ hg branch
  default
  $ echo "ccc" >> a
  $ hg status
  M a
  $ hg unshelve
  unshelving change 'default'
  temporarily committing pending changes (restore with 'hg unshelve --abort')
  rebasing shelved changes
  merging a
  warning: conflicts while merging a! (edit, then use 'hg resolve --mark')
  unresolved conflicts (see 'hg resolve', then 'hg unshelve --continue')
  [1]

Removing restore branch information from shelvedstate file(making it looks like
in previous versions) and running unshelve --continue

  $ cp .hg/shelvedstate .hg/shelvedstate_old
  $ cat .hg/shelvedstate_old | grep -v 'branchtorestore' > .hg/shelvedstate

  $ echo "aaabbbccc" > a
  $ rm a.orig
  $ hg resolve --mark a
  (no more unresolved files)
  continue: hg unshelve --continue
  $ hg unshelve --continue
  unshelve of 'default' complete
  $ cat a
  aaabbbccc
  $ hg status
  M a
  $ hg branch
  default
  $ cd ..

On non bare shelve the branch information shouldn't be restored

  $ hg init bare_shelve_on_new_branch
  $ cd bare_shelve_on_new_branch
  $ echo "aaa" >> a
  $ hg commit -A -m "a"
  adding a
  $ hg branch
  default
  $ hg branch test
  marked working directory as branch test
  (branches are permanent and global, did you want a bookmark?)
  $ echo "bbb" >> a
  $ hg status
  M a
  $ hg shelve a
  shelved as default
  1 files updated, 0 files merged, 0 files removed, 0 files unresolved
  $ hg branch
  test
  $ hg branch default
  marked working directory as branch default
  (branches are permanent and global, did you want a bookmark?)
  $ echo "bbb" >> b
  $ hg status
  ? b
  $ hg unshelve
  unshelving change 'default'
  $ hg status
  M a
  ? b
  $ hg branch
  default
  $ cd ..

Prepare unshelve with a corrupted shelvedstate
  $ hg init r1 && cd r1
  $ echo text1 > file && hg add file
  $ hg shelve
  shelved as default
  0 files updated, 0 files merged, 1 files removed, 0 files unresolved
  $ echo text2 > file && hg ci -Am text1
  adding file
  $ hg unshelve
  unshelving change 'default'
  rebasing shelved changes
  merging file
  warning: conflicts while merging file! (edit, then use 'hg resolve --mark')
  unresolved conflicts (see 'hg resolve', then 'hg unshelve --continue')
  [1]
  $ echo somethingsomething > .hg/shelvedstate

Unshelve --continue fails with appropriate message if shelvedstate is corrupted
  $ hg unshelve --continue
  abort: corrupted shelved state file
  (please run hg unshelve --abort to abort unshelve operation)
  [255]

Unshelve --abort works with a corrupted shelvedstate
  $ hg unshelve --abort
  could not read shelved state file, your working copy may be in an unexpected state
  please update to some commit

Unshelve --abort fails with appropriate message if there's no unshelve in
progress
  $ hg unshelve --abort
  abort: no unshelve in progress
  [255]
  $ cd ..

Unshelve respects --keep even if user intervention is needed
  $ hg init unshelvekeep && cd unshelvekeep
  $ echo 1 > file && hg ci -Am 1
  adding file
  $ echo 2 >> file
  $ hg shelve
  shelved as default
  1 files updated, 0 files merged, 0 files removed, 0 files unresolved
  $ echo 3 >> file && hg ci -Am 13
  $ hg shelve --list
  default         (*s ago) * changes to: 1 (glob)
  $ hg unshelve --keep
  unshelving change 'default'
  rebasing shelved changes
  merging file
  warning: conflicts while merging file! (edit, then use 'hg resolve --mark')
  unresolved conflicts (see 'hg resolve', then 'hg unshelve --continue')
  [1]
  $ hg resolve --mark file
  (no more unresolved files)
  continue: hg unshelve --continue
  $ hg unshelve --continue
  unshelve of 'default' complete
  $ hg shelve --list
  default         (*s ago) * changes to: 1 (glob)
  $ cd ..

Unshelving when there are deleted files does not crash (issue4176)
  $ hg init unshelve-deleted-file && cd unshelve-deleted-file
  $ echo a > a && echo b > b && hg ci -Am ab
  adding a
  adding b
  $ echo aa > a && hg shelve
  shelved as default
  1 files updated, 0 files merged, 0 files removed, 0 files unresolved
  $ rm b
  $ hg st
  ! b
  $ hg unshelve
  unshelving change 'default'
  $ hg shelve
  shelved as default
  1 files updated, 0 files merged, 0 files removed, 0 files unresolved
  $ rm a && echo b > b
  $ hg st
  ! a
  $ hg unshelve
  unshelving change 'default'
  abort: shelved change touches missing files
  (run hg status to see which files are missing)
  [255]
  $ hg st
  ! a
  $ cd ..

New versions of Mercurial know how to read onld shelvedstate files
  $ hg init oldshelvedstate
  $ cd oldshelvedstate
  $ echo root > root && hg ci -Am root
  adding root
  $ echo 1 > a
  $ hg add a
  $ hg shelve --name ashelve
  shelved as ashelve
  0 files updated, 0 files merged, 1 files removed, 0 files unresolved
  $ echo 2 > a
  $ hg ci -Am a
  adding a
  $ hg unshelve
  unshelving change 'ashelve'
  rebasing shelved changes
  merging a
  warning: conflicts while merging a! (edit, then use 'hg resolve --mark')
  unresolved conflicts (see 'hg resolve', then 'hg unshelve --continue')
  [1]
putting v1 shelvedstate file in place of a created v2
  $ cat << EOF > .hg/shelvedstate
  > 1
  > ashelve
  > 8b058dae057a5a78f393f4535d9e363dd5efac9d
  > 8b058dae057a5a78f393f4535d9e363dd5efac9d
  > 8b058dae057a5a78f393f4535d9e363dd5efac9d f543b27db2cdb41737e2e0008dc524c471da1446
  > f543b27db2cdb41737e2e0008dc524c471da1446
  > 
  > nokeep
  > :no-active-bookmark
  > EOF
  $ echo 1 > a
  $ hg resolve --mark a
  (no more unresolved files)
  continue: hg unshelve --continue
mercurial does not crash
  $ hg unshelve --continue
  unshelve of 'ashelve' complete

#if phasebased

Unshelve with some metadata file missing
----------------------------------------

  $ hg shelve
  shelved as default
  1 files updated, 0 files merged, 0 files removed, 0 files unresolved
  $ echo 3 > a

Test with the `.shelve` missing, but the changeset still in the repo (non-natural case)

  $ rm .hg/shelved/default.shelve
  $ hg unshelve
  unshelving change 'default'
  temporarily committing pending changes (restore with 'hg unshelve --abort')
  rebasing shelved changes
  merging a
  warning: conflicts while merging a! (edit, then use 'hg resolve --mark')
  unresolved conflicts (see 'hg resolve', then 'hg unshelve --continue')
  [1]
  $ hg unshelve --abort
  unshelve of 'default' aborted

Unshelve without .shelve metadata (can happen when upgrading a repository with old shelve)

  $ cat .hg/shelved/default.shelve
  node=82e0cb9893247d12667017593ce1e5655860f1ac
  $ hg strip --hidden --rev 82e0cb989324 --no-backup
  $ rm .hg/shelved/default.shelve
  $ hg unshelve
  unshelving change 'default'
  temporarily committing pending changes (restore with 'hg unshelve --abort')
  rebasing shelved changes
  merging a
  warning: conflicts while merging a! (edit, then use 'hg resolve --mark')
  unresolved conflicts (see 'hg resolve', then 'hg unshelve --continue')
  [1]
  $ cat .hg/shelved/default.shelve
  node=82e0cb9893247d12667017593ce1e5655860f1ac
  $ hg unshelve --abort
  unshelve of 'default' aborted

#endif

  $ cd ..