tests/test-bookmarks.t

cborutil: implement sans I/O decoder

The vendored CBOR package decodes by calling read(n) on an object.
There are a number of disadvantages to this:

* Uses blocking I/O. If sufficient data is not available, the decoder
  will hang until it is.
* No support for partial reads. If the read(n) returns less data than
  requested, the decoder raises an error.
* Requires the use of a file like object. If the original data is in
  say a buffer, we need to "cast" it to e.g. a BytesIO to appease the
  decoder.

In addition, the vendored CBOR decoder doesn't provide flexibility
that we desire. Specifically:

* It buffers indefinite length bytestrings instead of streaming them.
* It doesn't allow limiting the set of types that can be decoded. This
  property is useful when implementing a "hardened" decoder that is
  less susceptible to abusive input.
* It doesn't provide sufficient "hook points" and introspection to
  institute checks around behavior. These are useful for implementing
  a "hardened" decoder.

This all adds up to a reasonable set of justifications for writing our
own decoder.

So, this commit implements our own CBOR decoder.

At the heart of the decoder is a function that decodes a single "item"
from a buffer. This item can be a complete simple value or a special
value, such as "start of array." Using this function, we can build a
decoder that effectively iterates over the stream of decoded items and
builds up higher-level values, such as arrays, maps, sets, and indefinite
length bytestrings. And we can do this without performing I/O in the
decoder itself.

The core of the sans I/O decoder will probably not be used directly.
Instead, it is expected that we'll build utility functions for invoking
the decoder given specific input types. This will allow extreme
flexibility in how data is delivered to the decoder.

I'm pretty happy with the state of the decoder modulo the TODO items
to track wanted features to help with a "hardened" decoder. The one
thing I could be convinced to change is the handling of semantic tags.
Since we only support a single semantic tag (sets), I thought it would
be easier to handle them inline in decodeitem(). This is simpler now.
But if we add support for other semantic tags, it will likely be easier
to move semantic tag handling outside of decodeitem(). But, properly
supporting semantic tags opens up a whole can of worms, as many
semantic tags imply new types. I'm optimistic we won't need these in
Mercurial. But who knows.

I'm also pretty happy with the test coverage. Writing comprehensive
tests for partial decoding did flush out a handful of bugs. One
general improvement to testing would be fuzz testing for partial
decoding. I may implement that later. I also anticipate switching the
wire protocol code to this new decoder will flush out any lingering
bugs.

Differential Revision: https://phab.mercurial-scm.org/D4414

  $ hg init repo
  $ cd repo

  $ cat > $TESTTMP/hook.sh <<'EOF'
  > echo "test-hook-bookmark: $HG_BOOKMARK:  $HG_OLDNODE -> $HG_NODE"
  > EOF
  $ TESTHOOK="hooks.txnclose-bookmark.test=sh $TESTTMP/hook.sh"

no bookmarks

  $ hg bookmarks
  no bookmarks set

  $ hg bookmarks -Tjson
  [
  ]

bookmark rev -1

  $ hg bookmark X --config "$TESTHOOK"
  test-hook-bookmark: X:   -> 0000000000000000000000000000000000000000

list bookmarks

  $ hg bookmarks
   * X                         -1:000000000000

list bookmarks with color

  $ hg --config extensions.color= --config color.mode=ansi \
  >    bookmarks --color=always
  \x1b[0;32m * \x1b[0m\x1b[0;32mX\x1b[0m\x1b[0;32m                         -1:000000000000\x1b[0m (esc)

  $ echo a > a
  $ hg add a
  $ hg commit -m 0 --config "$TESTHOOK"
  test-hook-bookmark: X:  0000000000000000000000000000000000000000 -> f7b1eb17ad24730a1651fccd46c43826d1bbc2ac

bookmark X moved to rev 0

  $ hg bookmarks
   * X                         0:f7b1eb17ad24

look up bookmark

  $ hg log -r X
  changeset:   0:f7b1eb17ad24
  bookmark:    X
  tag:         tip
  user:        test
  date:        Thu Jan 01 00:00:00 1970 +0000
  summary:     0
  

second bookmark for rev 0, command should work even with ui.strict on

  $ hg --config ui.strict=1 bookmark X2 --config "$TESTHOOK"
  test-hook-bookmark: X2:   -> f7b1eb17ad24730a1651fccd46c43826d1bbc2ac

bookmark rev -1 again

  $ hg bookmark -r null Y

list bookmarks

  $ hg bookmarks
     X                         0:f7b1eb17ad24
   * X2                        0:f7b1eb17ad24
     Y                         -1:000000000000
  $ hg log -T '{bookmarks % "{rev} {bookmark}\n"}'
  0 X
  0 X2

  $ echo b > b
  $ hg add b
  $ hg commit -m 1 --config "$TESTHOOK"
  test-hook-bookmark: X2:  f7b1eb17ad24730a1651fccd46c43826d1bbc2ac -> 925d80f479bb026b0fb3deb27503780b13f74123

  $ hg bookmarks -T '{rev}:{node|shortest} {bookmark} {desc|firstline}\n'
  0:f7b1 X 0
  1:925d X2 1
  -1:0000 Y 

  $ hg bookmarks -Tjson
  [
   {
    "active": false,
    "bookmark": "X",
    "node": "f7b1eb17ad24730a1651fccd46c43826d1bbc2ac",
    "rev": 0
   },
   {
    "active": true,
    "bookmark": "X2",
    "node": "925d80f479bb026b0fb3deb27503780b13f74123",
    "rev": 1
   },
   {
    "active": false,
    "bookmark": "Y",
    "node": "0000000000000000000000000000000000000000",
    "rev": -1
   }
  ]

bookmarks revset

  $ hg log -r 'bookmark()'
  changeset:   0:f7b1eb17ad24
  bookmark:    X
  user:        test
  date:        Thu Jan 01 00:00:00 1970 +0000
  summary:     0
  
  changeset:   1:925d80f479bb
  bookmark:    X2
  tag:         tip
  user:        test
  date:        Thu Jan 01 00:00:00 1970 +0000
  summary:     1
  
  $ hg log -r 'bookmark(Y)'
  $ hg log -r 'bookmark(X2)'
  changeset:   1:925d80f479bb
  bookmark:    X2
  tag:         tip
  user:        test
  date:        Thu Jan 01 00:00:00 1970 +0000
  summary:     1
  
  $ hg log -r 'bookmark("re:X")'
  changeset:   0:f7b1eb17ad24
  bookmark:    X
  user:        test
  date:        Thu Jan 01 00:00:00 1970 +0000
  summary:     0
  
  changeset:   1:925d80f479bb
  bookmark:    X2
  tag:         tip
  user:        test
  date:        Thu Jan 01 00:00:00 1970 +0000
  summary:     1
  
  $ hg log -r 'bookmark("literal:X")'
  changeset:   0:f7b1eb17ad24
  bookmark:    X
  user:        test
  date:        Thu Jan 01 00:00:00 1970 +0000
  summary:     0
  

"." is expanded to the active bookmark:

  $ hg log -r 'bookmark(.)'
  changeset:   1:925d80f479bb
  bookmark:    X2
  tag:         tip
  user:        test
  date:        Thu Jan 01 00:00:00 1970 +0000
  summary:     1
  

but "literal:." is not since "." seems not a literal bookmark:

  $ hg log -r 'bookmark("literal:.")'
  abort: bookmark '.' does not exist!
  [255]

"." should fail if there's no active bookmark:

  $ hg bookmark --inactive
  $ hg log -r 'bookmark(.)'
  abort: no active bookmark!
  [255]
  $ hg log -r 'present(bookmark(.))'

  $ hg log -r 'bookmark(unknown)'
  abort: bookmark 'unknown' does not exist!
  [255]
  $ hg log -r 'bookmark("literal:unknown")'
  abort: bookmark 'unknown' does not exist!
  [255]
  $ hg log -r 'bookmark("re:unknown")'
  abort: no bookmarks exist that match 'unknown'!
  [255]
  $ hg log -r 'present(bookmark("literal:unknown"))'
  $ hg log -r 'present(bookmark("re:unknown"))'

  $ hg help revsets | grep 'bookmark('
      "bookmark([name])"

reactivate "X2"

  $ hg update X2
  0 files updated, 0 files merged, 0 files removed, 0 files unresolved
  (activating bookmark X2)

bookmarks X and X2 moved to rev 1, Y at rev -1

  $ hg bookmarks
     X                         0:f7b1eb17ad24
   * X2                        1:925d80f479bb
     Y                         -1:000000000000

bookmark rev 0 again

  $ hg bookmark -r 0 Z

  $ hg update X
  0 files updated, 0 files merged, 1 files removed, 0 files unresolved
  (activating bookmark X)
  $ echo c > c
  $ hg add c
  $ hg commit -m 2
  created new head

bookmarks X moved to rev 2, Y at rev -1, Z at rev 0

  $ hg bookmarks
   * X                         2:db815d6d32e6
     X2                        1:925d80f479bb
     Y                         -1:000000000000
     Z                         0:f7b1eb17ad24

rename nonexistent bookmark

  $ hg bookmark -m A B
  abort: bookmark 'A' does not exist
  [255]

rename to existent bookmark

  $ hg bookmark -m X Y
  abort: bookmark 'Y' already exists (use -f to force)
  [255]

force rename to existent bookmark

  $ hg bookmark -f -m X Y

rename bookmark using .

  $ hg book rename-me
  $ hg book -m . renamed --config "$TESTHOOK"
  test-hook-bookmark: rename-me:  db815d6d32e69058eadefc8cffbad37675707975 -> 
  test-hook-bookmark: renamed:   -> db815d6d32e69058eadefc8cffbad37675707975
  $ hg bookmark
     X2                        1:925d80f479bb
     Y                         2:db815d6d32e6
     Z                         0:f7b1eb17ad24
   * renamed                   2:db815d6d32e6
  $ hg up -q Y
  $ hg book -d renamed --config "$TESTHOOK"
  test-hook-bookmark: renamed:  db815d6d32e69058eadefc8cffbad37675707975 -> 

rename bookmark using . with no active bookmark

  $ hg book rename-me
  $ hg book -i rename-me
  $ hg book -m . renamed
  abort: no active bookmark!
  [255]
  $ hg up -q Y
  $ hg book -d rename-me

delete bookmark using .

  $ hg book delete-me
  $ hg book -d .
  $ hg bookmark
     X2                        1:925d80f479bb
     Y                         2:db815d6d32e6
     Z                         0:f7b1eb17ad24
  $ hg up -q Y

delete bookmark using . with no active bookmark

  $ hg book delete-me
  $ hg book -i delete-me
  $ hg book -d .
  abort: no active bookmark!
  [255]
  $ hg up -q Y
  $ hg book -d delete-me

list bookmarks

  $ hg bookmark
     X2                        1:925d80f479bb
   * Y                         2:db815d6d32e6
     Z                         0:f7b1eb17ad24

bookmarks from a revset
  $ hg bookmark -r '.^1' REVSET
  $ hg bookmark -r ':tip' TIP
  $ hg up -q TIP
  $ hg bookmarks
     REVSET                    0:f7b1eb17ad24
   * TIP                       2:db815d6d32e6
     X2                        1:925d80f479bb
     Y                         2:db815d6d32e6
     Z                         0:f7b1eb17ad24

  $ hg bookmark -d REVSET
  $ hg bookmark -d TIP

rename without new name or multiple names

  $ hg bookmark -m Y
  abort: new bookmark name required
  [255]
  $ hg bookmark -m Y Y2 Y3
  abort: only one new bookmark name allowed
  [255]

delete without name

  $ hg bookmark -d
  abort: bookmark name required
  [255]

delete nonexistent bookmark

  $ hg bookmark -d A
  abort: bookmark 'A' does not exist
  [255]

bookmark name with spaces should be stripped

  $ hg bookmark ' x  y '

list bookmarks

  $ hg bookmarks
     X2                        1:925d80f479bb
     Y                         2:db815d6d32e6
     Z                         0:f7b1eb17ad24
   * x  y                      2:db815d6d32e6
  $ hg log -T '{bookmarks % "{rev} {bookmark}\n"}'
  2 Y
  2 x  y
  1 X2
  0 Z

look up stripped bookmark name

  $ hg log -r '"x  y"'
  changeset:   2:db815d6d32e6
  bookmark:    Y
  bookmark:    x  y
  tag:         tip
  parent:      0:f7b1eb17ad24
  user:        test
  date:        Thu Jan 01 00:00:00 1970 +0000
  summary:     2
  

reject bookmark name with newline

  $ hg bookmark '
  > '
  abort: bookmark names cannot consist entirely of whitespace
  [255]

  $ hg bookmark -m Z '
  > '
  abort: bookmark names cannot consist entirely of whitespace
  [255]

bookmark with reserved name

  $ hg bookmark tip
  abort: the name 'tip' is reserved
  [255]

  $ hg bookmark .
  abort: the name '.' is reserved
  [255]

  $ hg bookmark null
  abort: the name 'null' is reserved
  [255]


bookmark with existing name

  $ hg bookmark X2
  abort: bookmark 'X2' already exists (use -f to force)
  [255]

  $ hg bookmark -m Y Z
  abort: bookmark 'Z' already exists (use -f to force)
  [255]

bookmark with name of branch

  $ hg bookmark default
  abort: a bookmark cannot have the name of an existing branch
  [255]

  $ hg bookmark -m Y default
  abort: a bookmark cannot have the name of an existing branch
  [255]

bookmark with integer name

  $ hg bookmark 10
  abort: cannot use an integer as a name
  [255]

bookmark with a name that matches a node id
  $ hg bookmark 925d80f479bb db815d6d32e6 --config "$TESTHOOK"
  bookmark 925d80f479bb matches a changeset hash
  (did you leave a -r out of an 'hg bookmark' command?)
  bookmark db815d6d32e6 matches a changeset hash
  (did you leave a -r out of an 'hg bookmark' command?)
  test-hook-bookmark: 925d80f479bb:   -> db815d6d32e69058eadefc8cffbad37675707975
  test-hook-bookmark: db815d6d32e6:   -> db815d6d32e69058eadefc8cffbad37675707975
  $ hg bookmark -d 925d80f479bb
  $ hg bookmark -d db815d6d32e6

  $ cd ..

bookmark with a name that matches an ambiguous node id

  $ hg init ambiguous
  $ cd ambiguous
  $ echo 0 > a
  $ hg ci -qAm 0
  $ for i in 1057 2857 4025; do
  >   hg up -q 0
  >   echo $i > a
  >   hg ci -qm $i
  > done
  $ hg up -q null
  $ hg log -r0: -T '{rev}:{node}\n'
  0:b4e73ffab476aa0ee32ed81ca51e07169844bc6a
  1:c56256a09cd28e5764f32e8e2810d0f01e2e357a
  2:c5623987d205cd6d9d8389bfc40fff9dbb670b48
  3:c562ddd9c94164376c20b86b0b4991636a3bf84f

  $ hg bookmark -r0 c562
  $ hg bookmarks
     c562                      0:b4e73ffab476

  $ cd ..

incompatible options

  $ cd repo

  $ hg bookmark -m Y -d Z
  abort: --delete and --rename are incompatible
  [255]

  $ hg bookmark -r 1 -d Z
  abort: --rev is incompatible with --delete
  [255]

  $ hg bookmark -r 1 -m Z Y
  abort: --rev is incompatible with --rename
  [255]

force bookmark with existing name

  $ hg bookmark -f X2 --config "$TESTHOOK"
  test-hook-bookmark: X2:  925d80f479bb026b0fb3deb27503780b13f74123 -> db815d6d32e69058eadefc8cffbad37675707975

force bookmark back to where it was, should deactivate it

  $ hg bookmark -fr1 X2
  $ hg bookmarks
     X2                        1:925d80f479bb
     Y                         2:db815d6d32e6
     Z                         0:f7b1eb17ad24
     x  y                      2:db815d6d32e6

forward bookmark to descendant without --force

  $ hg bookmark Z
  moving bookmark 'Z' forward from f7b1eb17ad24

list bookmarks

  $ hg bookmark
     X2                        1:925d80f479bb
     Y                         2:db815d6d32e6
   * Z                         2:db815d6d32e6
     x  y                      2:db815d6d32e6
  $ hg log -T '{bookmarks % "{rev} {bookmark}\n"}'
  2 Y
  2 Z
  2 x  y
  1 X2

revision but no bookmark name

  $ hg bookmark -r .
  abort: bookmark name required
  [255]

bookmark name with whitespace only

  $ hg bookmark ' '
  abort: bookmark names cannot consist entirely of whitespace
  [255]

  $ hg bookmark -m Y ' '
  abort: bookmark names cannot consist entirely of whitespace
  [255]

invalid bookmark

  $ hg bookmark 'foo:bar'
  abort: ':' cannot be used in a name
  [255]

  $ hg bookmark 'foo
  > bar'
  abort: '\n' cannot be used in a name
  [255]

the bookmark extension should be ignored now that it is part of core

  $ echo "[extensions]" >> $HGRCPATH
  $ echo "bookmarks=" >> $HGRCPATH
  $ hg bookmarks
     X2                        1:925d80f479bb
     Y                         2:db815d6d32e6
   * Z                         2:db815d6d32e6
     x  y                      2:db815d6d32e6

test summary

  $ hg summary
  parent: 2:db815d6d32e6 tip
   2
  branch: default
  bookmarks: *Z Y x  y
  commit: (clean)
  update: 1 new changesets, 2 branch heads (merge)
  phases: 3 draft

test id

  $ hg id
  db815d6d32e6 tip Y/Z/x  y

test rollback

  $ echo foo > f1
  $ hg bookmark tmp-rollback
  $ hg ci -Amr
  adding f1
  $ hg bookmarks
     X2                        1:925d80f479bb
     Y                         2:db815d6d32e6
     Z                         2:db815d6d32e6
   * tmp-rollback              3:2bf5cfec5864
     x  y                      2:db815d6d32e6
  $ hg rollback
  repository tip rolled back to revision 2 (undo commit)
  working directory now based on revision 2
  $ hg bookmarks
     X2                        1:925d80f479bb
     Y                         2:db815d6d32e6
     Z                         2:db815d6d32e6
   * tmp-rollback              2:db815d6d32e6
     x  y                      2:db815d6d32e6
  $ hg bookmark -f Z -r 1
  $ hg rollback
  repository tip rolled back to revision 2 (undo bookmark)
  $ hg bookmarks
     X2                        1:925d80f479bb
     Y                         2:db815d6d32e6
     Z                         2:db815d6d32e6
   * tmp-rollback              2:db815d6d32e6
     x  y                      2:db815d6d32e6
  $ hg bookmark -d tmp-rollback

activate bookmark on working dir parent without --force

  $ hg bookmark --inactive Z
  $ hg bookmark Z

test clone

  $ hg bookmark -r 2 -i @
  $ hg bookmark -r 2 -i a@
  $ hg bookmarks
     @                         2:db815d6d32e6
     X2                        1:925d80f479bb
     Y                         2:db815d6d32e6
   * Z                         2:db815d6d32e6
     a@                        2:db815d6d32e6
     x  y                      2:db815d6d32e6
  $ hg clone . cloned-bookmarks
  updating to bookmark @
  2 files updated, 0 files merged, 0 files removed, 0 files unresolved
  $ hg -R cloned-bookmarks bookmarks
   * @                         2:db815d6d32e6
     X2                        1:925d80f479bb
     Y                         2:db815d6d32e6
     Z                         2:db815d6d32e6
     a@                        2:db815d6d32e6
     x  y                      2:db815d6d32e6

test clone with pull protocol

  $ hg clone --pull . cloned-bookmarks-pull
  requesting all changes
  adding changesets
  adding manifests
  adding file changes
  added 3 changesets with 3 changes to 3 files (+1 heads)
  new changesets f7b1eb17ad24:db815d6d32e6
  updating to bookmark @
  2 files updated, 0 files merged, 0 files removed, 0 files unresolved
  $ hg -R cloned-bookmarks-pull bookmarks
   * @                         2:db815d6d32e6
     X2                        1:925d80f479bb
     Y                         2:db815d6d32e6
     Z                         2:db815d6d32e6
     a@                        2:db815d6d32e6
     x  y                      2:db815d6d32e6

delete multiple bookmarks at once

  $ hg bookmark -d @ a@

test clone with a bookmark named "default" (issue3677)

  $ hg bookmark -r 1 -f -i default
  $ hg clone . cloned-bookmark-default
  updating to branch default
  2 files updated, 0 files merged, 0 files removed, 0 files unresolved
  $ hg -R cloned-bookmark-default bookmarks
     X2                        1:925d80f479bb
     Y                         2:db815d6d32e6
     Z                         2:db815d6d32e6
     default                   1:925d80f479bb
     x  y                      2:db815d6d32e6
  $ hg -R cloned-bookmark-default parents -q
  2:db815d6d32e6
  $ hg bookmark -d default

test clone with a specific revision

  $ hg clone -r 925d80 . cloned-bookmarks-rev
  adding changesets
  adding manifests
  adding file changes
  added 2 changesets with 2 changes to 2 files
  new changesets f7b1eb17ad24:925d80f479bb
  updating to branch default
  2 files updated, 0 files merged, 0 files removed, 0 files unresolved
  $ hg -R cloned-bookmarks-rev bookmarks
     X2                        1:925d80f479bb

test clone with update to a bookmark

  $ hg clone -u Z . ../cloned-bookmarks-update
  updating to branch default
  2 files updated, 0 files merged, 0 files removed, 0 files unresolved
  $ hg -R ../cloned-bookmarks-update bookmarks
     X2                        1:925d80f479bb
     Y                         2:db815d6d32e6
   * Z                         2:db815d6d32e6
     x  y                      2:db815d6d32e6

create bundle with two heads

  $ hg clone . tobundle
  updating to branch default
  2 files updated, 0 files merged, 0 files removed, 0 files unresolved
  $ echo x > tobundle/x
  $ hg -R tobundle add tobundle/x
  $ hg -R tobundle commit -m'x'
  $ hg -R tobundle update -r -2
  0 files updated, 0 files merged, 1 files removed, 0 files unresolved
  $ echo y > tobundle/y
  $ hg -R tobundle branch test
  marked working directory as branch test
  (branches are permanent and global, did you want a bookmark?)
  $ hg -R tobundle add tobundle/y
  $ hg -R tobundle commit -m'y'
  $ hg -R tobundle bundle tobundle.hg
  searching for changes
  2 changesets found
  $ hg unbundle tobundle.hg
  adding changesets
  adding manifests
  adding file changes
  added 2 changesets with 2 changes to 2 files (+1 heads)
  new changesets 125c9a1d6df6:9ba5f110a0b3
  (run 'hg heads' to see heads, 'hg merge' to merge)

update to active bookmark if it's not the parent

(it is known issue that fsmonitor can't handle nested repositories. In
this test scenario, cloned-bookmark-default and tobundle exist in the
working directory of current repository)

  $ hg summary
  parent: 2:db815d6d32e6 
   2
  branch: default
  bookmarks: *Z Y x  y
  commit: 1 added, 1 unknown (new branch head) (no-fsmonitor !)
  commit: 1 added, * unknown (new branch head) (glob) (fsmonitor !)
  update: 2 new changesets (update)
  phases: 5 draft
  $ hg update
  1 files updated, 0 files merged, 0 files removed, 0 files unresolved
  updating bookmark Z
  $ hg bookmarks
     X2                        1:925d80f479bb
     Y                         2:db815d6d32e6
   * Z                         3:125c9a1d6df6
     x  y                      2:db815d6d32e6

pull --update works the same as pull && update

  $ hg bookmark -r3 Y
  moving bookmark 'Y' forward from db815d6d32e6
  $ cp -R ../cloned-bookmarks-update ../cloned-bookmarks-manual-update
  $ cp -R ../cloned-bookmarks-update ../cloned-bookmarks-manual-update-with-divergence

(manual version)

  $ hg -R ../cloned-bookmarks-manual-update update Y
  0 files updated, 0 files merged, 0 files removed, 0 files unresolved
  (activating bookmark Y)
  $ hg -R ../cloned-bookmarks-manual-update pull .
  pulling from .
  searching for changes
  adding changesets
  adding manifests
  adding file changes
  added 2 changesets with 2 changes to 2 files (+1 heads)
  updating bookmark Y
  updating bookmark Z
  new changesets 125c9a1d6df6:9ba5f110a0b3
  (run 'hg heads' to see heads, 'hg merge' to merge)

(# tests strange but with --date crashing when bookmark have to move)

  $ hg -R ../cloned-bookmarks-manual-update update -d 1986
  abort: revision matching date not found
  [255]
  $ hg -R ../cloned-bookmarks-manual-update update
  updating to active bookmark Y
  1 files updated, 0 files merged, 0 files removed, 0 files unresolved

(all in one version)

  $ hg -R ../cloned-bookmarks-update update Y
  0 files updated, 0 files merged, 0 files removed, 0 files unresolved
  (activating bookmark Y)
  $ hg -R ../cloned-bookmarks-update pull --update .
  pulling from .
  searching for changes
  adding changesets
  adding manifests
  adding file changes
  added 2 changesets with 2 changes to 2 files (+1 heads)
  updating bookmark Y
  updating bookmark Z
  new changesets 125c9a1d6df6:9ba5f110a0b3
  updating to active bookmark Y
  1 files updated, 0 files merged, 0 files removed, 0 files unresolved

We warn about divergent during bare update to the active bookmark

  $ hg -R ../cloned-bookmarks-manual-update-with-divergence update Y
  0 files updated, 0 files merged, 0 files removed, 0 files unresolved
  (activating bookmark Y)
  $ hg -R ../cloned-bookmarks-manual-update-with-divergence bookmarks -r X2 Y@1
  $ hg -R ../cloned-bookmarks-manual-update-with-divergence bookmarks
     X2                        1:925d80f479bb
   * Y                         2:db815d6d32e6
     Y@1                       1:925d80f479bb
     Z                         2:db815d6d32e6
     x  y                      2:db815d6d32e6
  $ hg -R ../cloned-bookmarks-manual-update-with-divergence pull
  pulling from $TESTTMP/repo
  searching for changes
  adding changesets
  adding manifests
  adding file changes
  added 2 changesets with 2 changes to 2 files (+1 heads)
  updating bookmark Y
  updating bookmark Z
  new changesets 125c9a1d6df6:9ba5f110a0b3
  (run 'hg heads' to see heads, 'hg merge' to merge)
  $ hg -R ../cloned-bookmarks-manual-update-with-divergence update
  updating to active bookmark Y
  1 files updated, 0 files merged, 0 files removed, 0 files unresolved
  1 other divergent bookmarks for "Y"

test wrongly formated bookmark

  $ echo '' >> .hg/bookmarks
  $ hg bookmarks
     X2                        1:925d80f479bb
     Y                         3:125c9a1d6df6
   * Z                         3:125c9a1d6df6
     x  y                      2:db815d6d32e6
  $ echo "Ican'thasformatedlines" >> .hg/bookmarks
  $ hg bookmarks
  malformed line in .hg/bookmarks: "Ican'thasformatedlines"
     X2                        1:925d80f479bb
     Y                         3:125c9a1d6df6
   * Z                         3:125c9a1d6df6
     x  y                      2:db815d6d32e6

test missing revisions

  $ echo "925d80f479b925d80f479bc925d80f479bccabab z" > .hg/bookmarks
  $ hg book
  no bookmarks set

test stripping a non-checked-out but bookmarked revision

  $ hg log --graph
  o  changeset:   4:9ba5f110a0b3
  |  branch:      test
  |  tag:         tip
  |  parent:      2:db815d6d32e6
  |  user:        test
  |  date:        Thu Jan 01 00:00:00 1970 +0000
  |  summary:     y
  |
  | @  changeset:   3:125c9a1d6df6
  |/   user:        test
  |    date:        Thu Jan 01 00:00:00 1970 +0000
  |    summary:     x
  |
  o  changeset:   2:db815d6d32e6
  |  parent:      0:f7b1eb17ad24
  |  user:        test
  |  date:        Thu Jan 01 00:00:00 1970 +0000
  |  summary:     2
  |
  | o  changeset:   1:925d80f479bb
  |/   user:        test
  |    date:        Thu Jan 01 00:00:00 1970 +0000
  |    summary:     1
  |
  o  changeset:   0:f7b1eb17ad24
     user:        test
     date:        Thu Jan 01 00:00:00 1970 +0000
     summary:     0
  
  $ hg book should-end-on-two
  $ hg co --clean 4
  1 files updated, 0 files merged, 1 files removed, 0 files unresolved
  (leaving bookmark should-end-on-two)
  $ hg book four
  $ hg --config extensions.mq= strip 3
  saved backup bundle to * (glob)
should-end-on-two should end up pointing to revision 2, as that's the
tipmost surviving ancestor of the stripped revision.
  $ hg log --graph
  @  changeset:   3:9ba5f110a0b3
  |  branch:      test
  |  bookmark:    four
  |  tag:         tip
  |  user:        test
  |  date:        Thu Jan 01 00:00:00 1970 +0000
  |  summary:     y
  |
  o  changeset:   2:db815d6d32e6
  |  bookmark:    should-end-on-two
  |  parent:      0:f7b1eb17ad24
  |  user:        test
  |  date:        Thu Jan 01 00:00:00 1970 +0000
  |  summary:     2
  |
  | o  changeset:   1:925d80f479bb
  |/   user:        test
  |    date:        Thu Jan 01 00:00:00 1970 +0000
  |    summary:     1
  |
  o  changeset:   0:f7b1eb17ad24
     user:        test
     date:        Thu Jan 01 00:00:00 1970 +0000
     summary:     0
  

no-op update doesn't deactivate bookmarks

(it is known issue that fsmonitor can't handle nested repositories. In
this test scenario, cloned-bookmark-default and tobundle exist in the
working directory of current repository)

  $ hg bookmarks
   * four                      3:9ba5f110a0b3
     should-end-on-two         2:db815d6d32e6
  $ hg up four
  0 files updated, 0 files merged, 0 files removed, 0 files unresolved
  $ hg up
  0 files updated, 0 files merged, 0 files removed, 0 files unresolved
  $ hg sum
  parent: 3:9ba5f110a0b3 tip
   y
  branch: test
  bookmarks: *four
  commit: 2 unknown (clean) (no-fsmonitor !)
  commit: * unknown (clean) (glob) (fsmonitor !)
  update: (current)
  phases: 4 draft

test clearing divergent bookmarks of linear ancestors

  $ hg bookmark Z -r 0
  $ hg bookmark Z@1 -r 1
  $ hg bookmark Z@2 -r 2
  $ hg bookmark Z@3 -r 3
  $ hg book
     Z                         0:f7b1eb17ad24
     Z@1                       1:925d80f479bb
     Z@2                       2:db815d6d32e6
     Z@3                       3:9ba5f110a0b3
   * four                      3:9ba5f110a0b3
     should-end-on-two         2:db815d6d32e6
  $ hg bookmark Z
  moving bookmark 'Z' forward from f7b1eb17ad24
  $ hg book
   * Z                         3:9ba5f110a0b3
     Z@1                       1:925d80f479bb
     four                      3:9ba5f110a0b3
     should-end-on-two         2:db815d6d32e6

test clearing only a single divergent bookmark across branches

  $ hg book foo -r 1
  $ hg book foo@1 -r 0
  $ hg book foo@2 -r 2
  $ hg book foo@3 -r 3
  $ hg book foo -r foo@3
  $ hg book
   * Z                         3:9ba5f110a0b3
     Z@1                       1:925d80f479bb
     foo                       3:9ba5f110a0b3
     foo@1                     0:f7b1eb17ad24
     foo@2                     2:db815d6d32e6
     four                      3:9ba5f110a0b3
     should-end-on-two         2:db815d6d32e6

pull --update works the same as pull && update (case #2)

It is assumed that "hg pull" itself doesn't update current active
bookmark ('Y' in tests below).

  $ hg pull -q ../cloned-bookmarks-update
  divergent bookmark Z stored as Z@2

(pulling revision on another named branch with --update updates
neither the working directory nor current active bookmark: "no-op"
case)

  $ echo yy >> y
  $ hg commit -m yy

  $ hg -R ../cloned-bookmarks-update bookmarks | grep ' Y '
   * Y                         3:125c9a1d6df6
  $ hg -R ../cloned-bookmarks-update pull . --update
  pulling from .
  searching for changes
  adding changesets
  adding manifests
  adding file changes
  added 1 changesets with 1 changes to 1 files
  divergent bookmark Z stored as Z@default
  adding remote bookmark foo
  adding remote bookmark four
  adding remote bookmark should-end-on-two
  new changesets 5fb12f0f2d51
  0 files updated, 0 files merged, 0 files removed, 0 files unresolved
  $ hg -R ../cloned-bookmarks-update parents -T "{rev}:{node|short}\n"
  3:125c9a1d6df6
  $ hg -R ../cloned-bookmarks-update bookmarks | grep ' Y '
   * Y                         3:125c9a1d6df6

(pulling revision on current named/topological branch with --update
updates the working directory and current active bookmark)

  $ hg update -C -q 125c9a1d6df6
  $ echo xx >> x
  $ hg commit -m xx

  $ hg -R ../cloned-bookmarks-update bookmarks | grep ' Y '
   * Y                         3:125c9a1d6df6
  $ hg -R ../cloned-bookmarks-update pull . --update
  pulling from .
  searching for changes
  adding changesets
  adding manifests
  adding file changes
  added 1 changesets with 1 changes to 1 files
  divergent bookmark Z stored as Z@default
  new changesets 81dcce76aa0b
  1 files updated, 0 files merged, 0 files removed, 0 files unresolved
  updating bookmark Y
  $ hg -R ../cloned-bookmarks-update parents -T "{rev}:{node|short}\n"
  6:81dcce76aa0b
  $ hg -R ../cloned-bookmarks-update bookmarks | grep ' Y '
   * Y                         6:81dcce76aa0b

  $ cd ..

ensure changelog is written before bookmarks
  $ hg init orderrepo
  $ cd orderrepo
  $ touch a
  $ hg commit -Aqm one
  $ hg book mybook
  $ echo a > a

  $ cat > $TESTTMP/pausefinalize.py <<EOF
  > from __future__ import absolute_import
  > import os
  > import time
  > from mercurial import extensions, localrepo
  > def transaction(orig, self, desc, report=None):
  >    tr = orig(self, desc, report)
  >    def sleep(*args, **kwargs):
  >        retry = 20
  >        while retry > 0 and not os.path.exists(b"$TESTTMP/unpause"):
  >            retry -= 1
  >            time.sleep(0.5)
  >        if os.path.exists(b"$TESTTMP/unpause"):
  >            os.remove(b"$TESTTMP/unpause")
  >    # It is important that this finalizer start with 'a', so it runs before
  >    # the changelog finalizer appends to the changelog.
  >    tr.addfinalize(b'a-sleep', sleep)
  >    return tr
  > 
  > def extsetup(ui):
  >    # This extension inserts an artifical pause during the transaction
  >    # finalizer, so we can run commands mid-transaction-close.
  >    extensions.wrapfunction(localrepo.localrepository, 'transaction',
  >                            transaction)
  > EOF
  $ hg commit -qm two --config extensions.pausefinalize=$TESTTMP/pausefinalize.py &
  $ sleep 2
  $ hg log -r .
  changeset:   0:867bc5792c8c
  bookmark:    mybook
  tag:         tip
  user:        test
  date:        Thu Jan 01 00:00:00 1970 +0000
  summary:     one
  
  $ hg bookmarks
   * mybook                    0:867bc5792c8c
  $ touch $TESTTMP/unpause

  $ cd ..

check whether HG_PENDING makes pending changes only in related
repositories visible to an external hook.

(emulate a transaction running concurrently by copied
.hg/bookmarks.pending in subsequent test)

  $ cat > $TESTTMP/savepending.sh <<EOF
  > cp .hg/bookmarks.pending .hg/bookmarks.pending.saved
  > exit 1 # to avoid adding new bookmark for subsequent tests
  > EOF

  $ hg init unrelated
  $ cd unrelated
  $ echo a > a
  $ hg add a
  $ hg commit -m '#0'
  $ hg --config hooks.pretxnclose="sh $TESTTMP/savepending.sh" bookmarks INVISIBLE
  transaction abort!
  rollback completed
  abort: pretxnclose hook exited with status 1
  [255]
  $ cp .hg/bookmarks.pending.saved .hg/bookmarks.pending

(check visible bookmarks while transaction running in repo)

  $ cat > $TESTTMP/checkpending.sh <<EOF
  > echo "@repo"
  > hg -R "$TESTTMP/repo" bookmarks
  > echo "@unrelated"
  > hg -R "$TESTTMP/unrelated" bookmarks
  > exit 1 # to avoid adding new bookmark for subsequent tests
  > EOF

  $ cd ../repo
  $ hg --config hooks.pretxnclose="sh $TESTTMP/checkpending.sh" bookmarks NEW
  @repo
   * NEW                       6:81dcce76aa0b
     X2                        1:925d80f479bb
     Y                         4:125c9a1d6df6
     Z                         5:5fb12f0f2d51
     Z@1                       1:925d80f479bb
     Z@2                       4:125c9a1d6df6
     foo                       3:9ba5f110a0b3
     foo@1                     0:f7b1eb17ad24
     foo@2                     2:db815d6d32e6
     four                      3:9ba5f110a0b3
     should-end-on-two         2:db815d6d32e6
     x  y                      2:db815d6d32e6
  @unrelated
  no bookmarks set
  transaction abort!
  rollback completed
  abort: pretxnclose hook exited with status 1
  [255]

Check pretxnclose-bookmark can abort a transaction
--------------------------------------------------

add hooks:

* to prevent NEW bookmark on a non-public changeset
* to prevent non-forward move of NEW bookmark

  $ cat << EOF >> .hg/hgrc
  > [hooks]
  > pretxnclose-bookmark.force-public  = sh -c "(echo \$HG_BOOKMARK| grep -v NEW > /dev/null) || [ -z \"\$HG_NODE\" ] || (hg log -r \"\$HG_NODE\" -T '{phase}' | grep public > /dev/null)"
  > pretxnclose-bookmark.force-forward = sh -c "(echo \$HG_BOOKMARK| grep -v NEW > /dev/null) || [ -z \"\$HG_NODE\" ] || (hg log -r \"max(\$HG_OLDNODE::\$HG_NODE)\" -T 'MATCH' | grep MATCH > /dev/null)"
  > EOF

  $ hg log -G -T phases
  @  changeset:   6:81dcce76aa0b
  |  tag:         tip
  |  phase:       draft
  |  parent:      4:125c9a1d6df6
  |  user:        test
  |  date:        Thu Jan 01 00:00:00 1970 +0000
  |  summary:     xx
  |
  | o  changeset:   5:5fb12f0f2d51
  | |  branch:      test
  | |  bookmark:    Z
  | |  phase:       draft
  | |  parent:      3:9ba5f110a0b3
  | |  user:        test
  | |  date:        Thu Jan 01 00:00:00 1970 +0000
  | |  summary:     yy
  | |
  o |  changeset:   4:125c9a1d6df6
  | |  bookmark:    Y
  | |  bookmark:    Z@2
  | |  phase:       public
  | |  parent:      2:db815d6d32e6
  | |  user:        test
  | |  date:        Thu Jan 01 00:00:00 1970 +0000
  | |  summary:     x
  | |
  | o  changeset:   3:9ba5f110a0b3
  |/   branch:      test
  |    bookmark:    foo
  |    bookmark:    four
  |    phase:       public
  |    user:        test
  |    date:        Thu Jan 01 00:00:00 1970 +0000
  |    summary:     y
  |
  o  changeset:   2:db815d6d32e6
  |  bookmark:    foo@2
  |  bookmark:    should-end-on-two
  |  bookmark:    x  y
  |  phase:       public
  |  parent:      0:f7b1eb17ad24
  |  user:        test
  |  date:        Thu Jan 01 00:00:00 1970 +0000
  |  summary:     2
  |
  | o  changeset:   1:925d80f479bb
  |/   bookmark:    X2
  |    bookmark:    Z@1
  |    phase:       public
  |    user:        test
  |    date:        Thu Jan 01 00:00:00 1970 +0000
  |    summary:     1
  |
  o  changeset:   0:f7b1eb17ad24
     bookmark:    foo@1
     phase:       public
     user:        test
     date:        Thu Jan 01 00:00:00 1970 +0000
     summary:     0
  

attempt to create on a default changeset

  $ hg bookmark -r 81dcce76aa0b NEW
  transaction abort!
  rollback completed
  abort: pretxnclose-bookmark.force-public hook exited with status 1
  [255]

create on a public changeset

  $ hg bookmark -r 9ba5f110a0b3 NEW

move to the other branch

  $ hg bookmark -f -r 125c9a1d6df6 NEW
  transaction abort!
  rollback completed
  abort: pretxnclose-bookmark.force-forward hook exited with status 1
  [255]