annotate tests/test-branches.t @ 52316:a820a7a1fce0 default tip

setup: require TLS 1.2 support from the Python interpreter (BC)

Before it was optional, and either 1.1 or 1.2 was sufficient.  Now that the
default minimum is 1.2, it needs to be present to work out of the box.

The code here is more convoluted than the corresponding checks in `sslutil.py`,
but I'm leaving it alone because it can all be simplified when py38 is dropped.

#testcases mmap nommap
#testcases v2 v3

#if mmap
  $ cat <<EOF >> $HGRCPATH
  > [storage]
  > revbranchcache.mmap=true
  > EOF
#else
  $ cat <<EOF >> $HGRCPATH
  > [storage]
  > revbranchcache.mmap=false
  > EOF
#endif

#if v3
  $ cat <<EOF >> $HGRCPATH
  > [experimental]
  > branch-cache-v3=yes
  > EOF
#else
  $ cat <<EOF >> $HGRCPATH
  > [experimental]
  > branch-cache-v3=no
  > EOF
#endif

  $ hg init a
  $ cd a

Verify checking branch of nullrev before the cache is created doesnt crash
  $ hg log -r 'branch(.)' -T '{branch}\n'

Basic test
  $ echo 'root' >root
  $ hg add root
  $ hg commit -d '0 0' -m "Adding root node"

  $ echo 'a' >a
  $ hg add a
  $ hg branch a
  marked working directory as branch a
  (branches are permanent and global, did you want a bookmark?)
  $ hg commit -d '1 0' -m "Adding a branch"

  $ hg branch q
  marked working directory as branch q
  $ echo 'aa' >a
  $ hg branch -C
  reset working directory to branch a
  $ hg commit -d '2 0' -m "Adding to a branch"

  $ hg update -C 0
  0 files updated, 0 files merged, 1 files removed, 0 files unresolved
  $ echo 'b' >b
  $ hg add b
  $ hg branch b
  marked working directory as branch b
  $ hg commit -d '2 0' -m "Adding b branch"

  $ echo 'bh1' >bh1
  $ hg add bh1
  $ hg commit -d '3 0' -m "Adding b branch head 1"

  $ hg update -C 2
  1 files updated, 0 files merged, 2 files removed, 0 files unresolved
  $ echo 'bh2' >bh2
  $ hg add bh2
  $ hg commit -d '4 0' -m "Adding b branch head 2"

  $ echo 'c' >c
  $ hg add c
  $ hg branch c
  marked working directory as branch c
  $ hg commit -d '5 0' -m "Adding c branch"

reserved names

  $ hg branch tip
  abort: the name 'tip' is reserved
  [10]
  $ hg branch null
  abort: the name 'null' is reserved
  [10]
  $ hg branch .
  abort: the name '.' is reserved
  [10]

invalid characters

  $ hg branch 'foo:bar'
  abort: ':' cannot be used in a name
  [10]

  $ hg branch 'foo
  > bar'
  abort: '\n' cannot be used in a name
  [10]

trailing or leading spaces should be stripped before testing duplicates

  $ hg branch 'b '
  abort: a branch of the same name already exists
  (use 'hg update' to switch to it)
  [10]

  $ hg branch ' b'
  abort: a branch of the same name already exists
  (use 'hg update' to switch to it)
  [10]

underscores in numeric branch names (issue6737)

  $ hg branch 2700_210
  marked working directory as branch 2700_210

verify update will accept invalid legacy branch names

  $ hg init test-invalid-branch-name
  $ cd test-invalid-branch-name
  $ hg unbundle -u "$TESTDIR"/bundles/test-invalid-branch-name.hg
  adding changesets
  adding manifests
  adding file changes
  added 3 changesets with 3 changes to 2 files
  new changesets f0e4c7f04036:33c2ceb9310b (3 drafts)
  1 files updated, 0 files merged, 0 files removed, 0 files unresolved

  $ hg update '"colon:test"'
  1 files updated, 0 files merged, 0 files removed, 0 files unresolved
  $ cd ..

  $ echo 'd' >d
  $ hg add d
  $ hg branch 'a branch name much longer than the default justification used by branches'
  marked working directory as branch a branch name much longer than the default justification used by branches
  $ hg commit -d '6 0' -m "Adding d branch"

  $ hg branches
  a branch name much longer than the default justification used by branches 7:10ff5895aa57
  b                              4:aee39cd168d0
  c                              6:589736a22561 (inactive)
  a                              5:d8cbc61dbaa6 (inactive)
  default                        0:19709c5a4e75 (inactive)

-------

  $ hg branches -a
  a branch name much longer than the default justification used by branches 7:10ff5895aa57
  b                              4:aee39cd168d0

--- Branch a

  $ hg log -b a
  changeset:   5:d8cbc61dbaa6
  branch:      a
  parent:      2:881fe2b92ad0
  user:        test
  date:        Thu Jan 01 00:00:04 1970 +0000
  summary:     Adding b branch head 2
  
  changeset:   2:881fe2b92ad0
  branch:      a
  user:        test
  date:        Thu Jan 01 00:00:02 1970 +0000
  summary:     Adding to a branch
  
  changeset:   1:dd6b440dd85a
  branch:      a
  user:        test
  date:        Thu Jan 01 00:00:01 1970 +0000
  summary:     Adding a branch
  

---- Branch b

  $ hg log -b b
  changeset:   4:aee39cd168d0
  branch:      b
  user:        test
  date:        Thu Jan 01 00:00:03 1970 +0000
  summary:     Adding b branch head 1
  
  changeset:   3:ac22033332d1
  branch:      b
  parent:      0:19709c5a4e75
  user:        test
  date:        Thu Jan 01 00:00:02 1970 +0000
  summary:     Adding b branch
  

---- going to test branch listing by rev
  $ hg branches -r0
  default                        0:19709c5a4e75 (inactive)
  $ hg branches -qr0
  default
--- now more than one rev
  $ hg branches -r2:5
  b                              4:aee39cd168d0
  a                              5:d8cbc61dbaa6 (inactive)
  $ hg branches -qr2:5
  b
  a
---- going to test branch closing

  $ hg branches
  a branch name much longer than the default justification used by branches 7:10ff5895aa57
  b                              4:aee39cd168d0
  c                              6:589736a22561 (inactive)
  a                              5:d8cbc61dbaa6 (inactive)
  default                        0:19709c5a4e75 (inactive)
  $ hg up -C b
  2 files updated, 0 files merged, 4 files removed, 0 files unresolved
  $ echo 'xxx1' >> b
  $ hg commit -d '7 0' -m 'adding cset to branch b'
  $ hg up -C aee39cd168d0
  1 files updated, 0 files merged, 0 files removed, 0 files unresolved
  $ echo 'xxx2' >> b
  $ hg commit -d '8 0' -m 'adding head to branch b'
  created new head
  $ echo 'xxx3' >> b
  $ hg commit -d '9 0' -m 'adding another cset to branch b'
  $ hg branches
  b                             10:bfbe841b666e
  a branch name much longer than the default justification used by branches 7:10ff5895aa57
  c                              6:589736a22561 (inactive)
  a                              5:d8cbc61dbaa6 (inactive)
  default                        0:19709c5a4e75 (inactive)
  $ hg heads --closed
  changeset:   10:bfbe841b666e
  branch:      b
  tag:         tip
  user:        test
  date:        Thu Jan 01 00:00:09 1970 +0000
  summary:     adding another cset to branch b
  
  changeset:   8:eebb944467c9
  branch:      b
  parent:      4:aee39cd168d0
  user:        test
  date:        Thu Jan 01 00:00:07 1970 +0000
  summary:     adding cset to branch b
  
  changeset:   7:10ff5895aa57
  branch:      a branch name much longer than the default justification used by branches
  user:        test
  date:        Thu Jan 01 00:00:06 1970 +0000
  summary:     Adding d branch
  
  changeset:   6:589736a22561
  branch:      c
  user:        test
  date:        Thu Jan 01 00:00:05 1970 +0000
  summary:     Adding c branch
  
  changeset:   5:d8cbc61dbaa6
  branch:      a
  parent:      2:881fe2b92ad0
  user:        test
  date:        Thu Jan 01 00:00:04 1970 +0000
  summary:     Adding b branch head 2
  
  changeset:   0:19709c5a4e75
  user:        test
  date:        Thu Jan 01 00:00:00 1970 +0000
  summary:     Adding root node
  
  $ hg heads
  changeset:   10:bfbe841b666e
  branch:      b
  tag:         tip
  user:        test
  date:        Thu Jan 01 00:00:09 1970 +0000
  summary:     adding another cset to branch b
  
  changeset:   8:eebb944467c9
  branch:      b
  parent:      4:aee39cd168d0
  user:        test
  date:        Thu Jan 01 00:00:07 1970 +0000
  summary:     adding cset to branch b
  
  changeset:   7:10ff5895aa57
  branch:      a branch name much longer than the default justification used by branches
  user:        test
  date:        Thu Jan 01 00:00:06 1970 +0000
  summary:     Adding d branch
  
  changeset:   6:589736a22561
  branch:      c
  user:        test
  date:        Thu Jan 01 00:00:05 1970 +0000
  summary:     Adding c branch
  
  changeset:   5:d8cbc61dbaa6
  branch:      a
  parent:      2:881fe2b92ad0
  user:        test
  date:        Thu Jan 01 00:00:04 1970 +0000
  summary:     Adding b branch head 2
  
  changeset:   0:19709c5a4e75
  user:        test
  date:        Thu Jan 01 00:00:00 1970 +0000
  summary:     Adding root node
  
  $ hg commit -d '9 0' --close-branch -m 'prune bad branch'
  $ hg branches -a
  b                              8:eebb944467c9
  a branch name much longer than the default justification used by branches 7:10ff5895aa57
  $ hg up -C b
  1 files updated, 0 files merged, 0 files removed, 0 files unresolved
  $ hg commit -d '9 0' --close-branch -m 'close this part branch too'
  $ hg commit -d '9 0' --close-branch -m 're-closing this branch'
  abort: current revision is already a branch closing head
  [10]

  $ echo foo > b
  $ hg commit -d '9 0' --close-branch -m 're-closing this branch'

  $ echo bar > b
  $ hg commit -d '9 0' --close-branch -m 're-closing this branch' bh1
  abort: current revision is already a branch closing head
  [10]
  $ hg commit -d '9 0' --close-branch -m 're-closing this branch' b

  $ echo baz > b
  $ hg commit -d '9 0' --close-branch -m 'empty re-closing this branch' -X b
  abort: current revision is already a branch closing head
  [10]
  $ hg revert b

  $ hg debugstrip --rev 13: --no-backup
  1 files updated, 0 files merged, 0 files removed, 0 files unresolved
  $ hg revert --all --no-backup

  $ hg log -r tip --debug
  changeset:   12:e3d49c0575d8fc2cb1cd6859c747c14f5f6d499f
  branch:      b
  tag:         tip
  phase:       draft
  parent:      8:eebb944467c9fb9651ed232aeaf31b3c0a7fc6c1
  parent:      -1:0000000000000000000000000000000000000000
  manifest:    8:6f9ed32d2b310e391a4f107d5f0f071df785bfee
  user:        test
  date:        Thu Jan 01 00:00:09 1970 +0000
  extra:       branch=b
  extra:       close=1
  description:
  close this part branch too
  
  
--- b branch should be inactive

  $ hg branches
  a branch name much longer than the default justification used by branches 7:10ff5895aa57
  c                              6:589736a22561 (inactive)
  a                              5:d8cbc61dbaa6 (inactive)
  default                        0:19709c5a4e75 (inactive)
  $ hg branches -c
  a branch name much longer than the default justification used by branches 7:10ff5895aa57
  b                             12:e3d49c0575d8 (closed)
  c                              6:589736a22561 (inactive)
  a                              5:d8cbc61dbaa6 (inactive)
  default                        0:19709c5a4e75 (inactive)
  $ hg branches -a
  a branch name much longer than the default justification used by branches 7:10ff5895aa57
  $ hg branches -q
  a branch name much longer than the default justification used by branches
  c
  a
  default
  $ hg heads b
  no open branch heads found on branches b
  [1]
  $ hg heads --closed b
  changeset:   12:e3d49c0575d8
  branch:      b
  tag:         tip
  parent:      8:eebb944467c9
  user:        test
  date:        Thu Jan 01 00:00:09 1970 +0000
  summary:     close this part branch too
  
  changeset:   11:d3f163457ebf
  branch:      b
  user:        test
  date:        Thu Jan 01 00:00:09 1970 +0000
  summary:     prune bad branch
  
  $ echo 'xxx4' >> b
  $ hg commit -d '9 0' -m 'reopen branch with a change'
  reopening closed branch head 12

--- branch b is back in action

  $ hg branches -a
  b                             13:e23b5505d1ad
  a branch name much longer than the default justification used by branches 7:10ff5895aa57

---- test heads listings

  $ hg heads
  changeset:   13:e23b5505d1ad
  branch:      b
  tag:         tip
  user:        test
  date:        Thu Jan 01 00:00:09 1970 +0000
  summary:     reopen branch with a change
  
  changeset:   7:10ff5895aa57
  branch:      a branch name much longer than the default justification used by branches
  user:        test
  date:        Thu Jan 01 00:00:06 1970 +0000
  summary:     Adding d branch
  
  changeset:   6:589736a22561
  branch:      c
  user:        test
  date:        Thu Jan 01 00:00:05 1970 +0000
  summary:     Adding c branch
  
  changeset:   5:d8cbc61dbaa6
  branch:      a
  parent:      2:881fe2b92ad0
  user:        test
  date:        Thu Jan 01 00:00:04 1970 +0000
  summary:     Adding b branch head 2
  
  changeset:   0:19709c5a4e75
  user:        test
  date:        Thu Jan 01 00:00:00 1970 +0000
  summary:     Adding root node
  

branch default

  $ hg heads default
  changeset:   0:19709c5a4e75
  user:        test
  date:        Thu Jan 01 00:00:00 1970 +0000
  summary:     Adding root node
  

branch a

  $ hg heads a
  changeset:   5:d8cbc61dbaa6
  branch:      a
  parent:      2:881fe2b92ad0
  user:        test
  date:        Thu Jan 01 00:00:04 1970 +0000
  summary:     Adding b branch head 2
  
  $ hg heads --active a
  no open branch heads found on branches a
  [1]

branch b

  $ hg heads b
  changeset:   13:e23b5505d1ad
  branch:      b
  tag:         tip
  user:        test
  date:        Thu Jan 01 00:00:09 1970 +0000
  summary:     reopen branch with a change
  
  $ hg heads --closed b
  changeset:   13:e23b5505d1ad
  branch:      b
  tag:         tip
  user:        test
  date:        Thu Jan 01 00:00:09 1970 +0000
  summary:     reopen branch with a change
  
  changeset:   11:d3f163457ebf
  branch:      b
  user:        test
  date:        Thu Jan 01 00:00:09 1970 +0000
  summary:     prune bad branch
  

reclose branch

  $ hg up -C c
  3 files updated, 0 files merged, 2 files removed, 0 files unresolved
  $ hg commit -d '9 0' --close-branch -m 'reclosing this branch'
  $ hg branches
  b                             13:e23b5505d1ad
  a branch name much longer than the default justification used by branches 7:10ff5895aa57
  a                              5:d8cbc61dbaa6 (inactive)
  default                        0:19709c5a4e75 (inactive)
  $ hg branches --closed
  b                             13:e23b5505d1ad
  a branch name much longer than the default justification used by branches 7:10ff5895aa57
  c                             14:f894c25619d3 (closed)
  a                              5:d8cbc61dbaa6 (inactive)
  default                        0:19709c5a4e75 (inactive)

multihead branch

  $ hg up -C default
  0 files updated, 0 files merged, 3 files removed, 0 files unresolved
  $ hg branch m
  marked working directory as branch m
  $ touch m
  $ hg add m
  $ hg commit -d '10 0' -m 'multihead base'
  $ echo "m1" >m
  $ hg commit -d '10 0' -m 'head 1'
  $ hg up -C '.^'
  1 files updated, 0 files merged, 0 files removed, 0 files unresolved
  $ echo "m2" >m
  $ hg commit -d '10 0' -m 'head 2'
  created new head
  $ hg log -b m
  changeset:   17:df343b0df04f
  branch:      m
  tag:         tip
  parent:      15:f3447637f53e
  user:        test
  date:        Thu Jan 01 00:00:10 1970 +0000
  summary:     head 2
  
  changeset:   16:a58ca5d3bdf3
  branch:      m
  user:        test
  date:        Thu Jan 01 00:00:10 1970 +0000
  summary:     head 1
  
  changeset:   15:f3447637f53e
  branch:      m
  parent:      0:19709c5a4e75
  user:        test
  date:        Thu Jan 01 00:00:10 1970 +0000
  summary:     multihead base
  
  $ hg heads --topo m
  changeset:   17:df343b0df04f
  branch:      m
  tag:         tip
  parent:      15:f3447637f53e
  user:        test
  date:        Thu Jan 01 00:00:10 1970 +0000
  summary:     head 2
  
  changeset:   16:a58ca5d3bdf3
  branch:      m
  user:        test
  date:        Thu Jan 01 00:00:10 1970 +0000
  summary:     head 1
  
  $ hg branches
  m                             17:df343b0df04f
  b                             13:e23b5505d1ad
  a branch name much longer than the default justification used by branches 7:10ff5895aa57
  a                              5:d8cbc61dbaa6 (inactive)
  default                        0:19709c5a4e75 (inactive)

partially merge multihead branch

  $ hg up -C default
  0 files updated, 0 files merged, 1 files removed, 0 files unresolved
  $ hg branch md
  marked working directory as branch md
  $ hg merge m
  1 files updated, 0 files merged, 0 files removed, 0 files unresolved
  (branch merge, don't forget to commit)
  $ hg commit -d '11 0' -m 'merge head 2'
  $ hg heads --topo m
  changeset:   16:a58ca5d3bdf3
  branch:      m
  user:        test
  date:        Thu Jan 01 00:00:10 1970 +0000
  summary:     head 1
  
  $ hg branches
  md                            18:c914c99f1fbb
  m                             17:df343b0df04f
  b                             13:e23b5505d1ad
  a branch name much longer than the default justification used by branches 7:10ff5895aa57
  a                              5:d8cbc61dbaa6 (inactive)
  default                        0:19709c5a4e75 (inactive)

partially close multihead branch

  $ hg up -C a58ca5d3bdf3
  1 files updated, 0 files merged, 0 files removed, 0 files unresolved
  $ hg commit -d '12 0' -m 'close head 1' --close-branch
  $ hg heads --topo m
  changeset:   19:cd21a80baa3d
  branch:      m
  tag:         tip
  parent:      16:a58ca5d3bdf3
  user:        test
  date:        Thu Jan 01 00:00:12 1970 +0000
  summary:     close head 1
  
  $ hg branches
  md                            18:c914c99f1fbb
  b                             13:e23b5505d1ad
  a branch name much longer than the default justification used by branches 7:10ff5895aa57
  m                             17:df343b0df04f (inactive)
  a                              5:d8cbc61dbaa6 (inactive)
  default                        0:19709c5a4e75 (inactive)

default branch colors:

  $ cat <<EOF >> $HGRCPATH
  > [extensions]
  > color =
  > [color]
  > mode = ansi
  > EOF

  $ hg up -C b
  2 files updated, 0 files merged, 1 files removed, 0 files unresolved
  $ hg branches --color=always
  \x1b[0;0mmd\x1b[0m\x1b[0;33m                            18:c914c99f1fbb\x1b[0m (esc)
  \x1b[0;32mb\x1b[0m\x1b[0;33m                             13:e23b5505d1ad\x1b[0m (esc)
  \x1b[0;0ma branch name much longer than the default justification used by branches\x1b[0m\x1b[0;33m 7:10ff5895aa57\x1b[0m (esc)
  \x1b[0;0mm\x1b[0m\x1b[0;33m                             17:df343b0df04f\x1b[0m (inactive) (esc)
  \x1b[0;0ma\x1b[0m\x1b[0;33m                              5:d8cbc61dbaa6\x1b[0m (inactive) (esc)
  \x1b[0;0mdefault\x1b[0m\x1b[0;33m                        0:19709c5a4e75\x1b[0m (inactive) (esc)

default closed branch color:

  $ hg branches --color=always --closed
  \x1b[0;0mmd\x1b[0m\x1b[0;33m                            18:c914c99f1fbb\x1b[0m (esc)
  \x1b[0;32mb\x1b[0m\x1b[0;33m                             13:e23b5505d1ad\x1b[0m (esc)
  \x1b[0;0ma branch name much longer than the default justification used by branches\x1b[0m\x1b[0;33m 7:10ff5895aa57\x1b[0m (esc)
  \x1b[0;0mm\x1b[0m\x1b[0;33m                             17:df343b0df04f\x1b[0m (inactive) (esc)
  \x1b[0;30;1mc\x1b[0m\x1b[0;33m                             14:f894c25619d3\x1b[0m (closed) (esc)
  \x1b[0;0ma\x1b[0m\x1b[0;33m                              5:d8cbc61dbaa6\x1b[0m (inactive) (esc)
  \x1b[0;0mdefault\x1b[0m\x1b[0;33m                        0:19709c5a4e75\x1b[0m (inactive) (esc)

  $ cat <<EOF >> $HGRCPATH
  > [extensions]
  > color =
  > [color]
  > branches.active = green
  > branches.closed = blue
  > branches.current = red
  > branches.inactive = magenta
  > log.changeset = cyan
  > EOF

custom branch colors:

  $ hg branches --color=always
  \x1b[0;32mmd\x1b[0m\x1b[0;36m                            18:c914c99f1fbb\x1b[0m (esc)
  \x1b[0;31mb\x1b[0m\x1b[0;36m                             13:e23b5505d1ad\x1b[0m (esc)
  \x1b[0;32ma branch name much longer than the default justification used by branches\x1b[0m\x1b[0;36m 7:10ff5895aa57\x1b[0m (esc)
  \x1b[0;35mm\x1b[0m\x1b[0;36m                             17:df343b0df04f\x1b[0m (inactive) (esc)
  \x1b[0;35ma\x1b[0m\x1b[0;36m                              5:d8cbc61dbaa6\x1b[0m (inactive) (esc)
  \x1b[0;35mdefault\x1b[0m\x1b[0;36m                        0:19709c5a4e75\x1b[0m (inactive) (esc)

custom closed branch color:

  $ hg branches --color=always --closed
  \x1b[0;32mmd\x1b[0m\x1b[0;36m                            18:c914c99f1fbb\x1b[0m (esc)
  \x1b[0;31mb\x1b[0m\x1b[0;36m                             13:e23b5505d1ad\x1b[0m (esc)
  \x1b[0;32ma branch name much longer than the default justification used by branches\x1b[0m\x1b[0;36m 7:10ff5895aa57\x1b[0m (esc)
  \x1b[0;35mm\x1b[0m\x1b[0;36m                             17:df343b0df04f\x1b[0m (inactive) (esc)
  \x1b[0;34mc\x1b[0m\x1b[0;36m                             14:f894c25619d3\x1b[0m (closed) (esc)
  \x1b[0;35ma\x1b[0m\x1b[0;36m                              5:d8cbc61dbaa6\x1b[0m (inactive) (esc)
  \x1b[0;35mdefault\x1b[0m\x1b[0;36m                        0:19709c5a4e75\x1b[0m (inactive) (esc)

template output:

  $ hg branches -Tjson --closed
  [
   {
    "active": true,
    "branch": "md",
    "closed": false,
    "current": false,
    "node": "c914c99f1fbb2b1d785a0a939ed3f67275df18e9",
    "rev": 18
   },
   {
    "active": true,
    "branch": "b",
    "closed": false,
    "current": true,
    "node": "e23b5505d1ad24aab6f84fd8c7cb8cd8e5e93be0",
    "rev": 13
   },
   {
    "active": true,
    "branch": "a branch name much longer than the default justification used by branches",
    "closed": false,
    "current": false,
    "node": "10ff5895aa5793bd378da574af8cec8ea408d831",
    "rev": 7
   },
   {
    "active": false,
    "branch": "m",
    "closed": false,
    "current": false,
    "node": "df343b0df04feb2a946cd4b6e9520e552fef14ee",
    "rev": 17
   },
   {
    "active": false,
    "branch": "c",
    "closed": true,
    "current": false,
    "node": "f894c25619d3f1484639d81be950e0a07bc6f1f6",
    "rev": 14
   },
   {
    "active": false,
    "branch": "a",
    "closed": false,
    "current": false,
    "node": "d8cbc61dbaa6dc817175d1e301eecb863f280832",
    "rev": 5
   },
   {
    "active": false,
    "branch": "default",
    "closed": false,
    "current": false,
    "node": "19709c5a4e75bf938f8e349aff97438539bb729e",
    "rev": 0
   }
  ]

  $ hg branches --closed -T '{if(closed, "{branch}\n")}'
  c

  $ hg branches -T '{word(0, branch)}: {desc|firstline}\n'
  md: merge head 2
  b: reopen branch with a change
  a: Adding d branch
  m: head 2
  a: Adding b branch head 2
  default: Adding root node

  $ cat <<'EOF' > "$TESTTMP/map-myjson"
  > docheader = '\{\n'
  > docfooter = '\n}\n'
  > separator = ',\n'
  > branches = ' {dict(branch, node|short)|json}'
  > EOF
  $ hg branches -T "$TESTTMP/map-myjson"
  {
   {"branch": "md", "node": "c914c99f1fbb"},
   {"branch": "b", "node": "e23b5505d1ad"},
   {"branch": "a branch *", "node": "10ff5895aa57"}, (glob)
   {"branch": "m", "node": "df343b0df04f"},
   {"branch": "a", "node": "d8cbc61dbaa6"},
   {"branch": "default", "node": "19709c5a4e75"}
  }

  $ cat <<'EOF' >> .hg/hgrc
  > [templates]
  > myjson = ' {dict(branch, node|short)|json}'
  > myjson:docheader = '\{\n'
  > myjson:docfooter = '\n}\n'
  > myjson:separator = ',\n'
  > EOF
  $ hg branches -T myjson
  {
   {"branch": "md", "node": "c914c99f1fbb"},
   {"branch": "b", "node": "e23b5505d1ad"},
   {"branch": "a branch *", "node": "10ff5895aa57"}, (glob)
   {"branch": "m", "node": "df343b0df04f"},
   {"branch": "a", "node": "d8cbc61dbaa6"},
   {"branch": "default", "node": "19709c5a4e75"}
  }

  $ cat <<'EOF' >> .hg/hgrc
  > [templates]
  > :docheader = 'should not be selected as a docheader for literal templates\n'
  > EOF
  $ hg branches -T '{branch}\n'
  md
  b
  a branch name much longer than the default justification used by branches
  m
  a
  default

Tests of revision branch name caching

We rev branch cache is updated automatically. In these tests we use a trick to
trigger rebuilds. We remove the branch head cache and run 'hg head' to cause a
rebuild that also will populate the rev branch cache.

revision branch cache is created when building the branch head cache
  $ rm -rf .hg/cache; hg head a -T '{rev}\n'
  5
  $ f --hexdump --size .hg/cache/rbc-*
  .hg/cache/rbc-names-v2: size=92
  0000: 64 65 66 61 75 6c 74 00 61 00 62 00 63 00 61 20 |default.a.b.c.a |
  0010: 62 72 61 6e 63 68 20 6e 61 6d 65 20 6d 75 63 68 |branch name much|
  0020: 20 6c 6f 6e 67 65 72 20 74 68 61 6e 20 74 68 65 | longer than the|
  0030: 20 64 65 66 61 75 6c 74 20 6a 75 73 74 69 66 69 | default justifi|
  0040: 63 61 74 69 6f 6e 20 75 73 65 64 20 62 79 20 62 |cation used by b|
  0050: 72 61 6e 63 68 65 73 00 6d 00 6d 64             |ranches.m.md|
  .hg/cache/rbc-revs-v2: size=160
  0000: 19 70 9c 5a 00 00 00 00 dd 6b 44 0d 00 00 00 01 |.p.Z.....kD.....|
  0010: 88 1f e2 b9 00 00 00 01 ac 22 03 33 00 00 00 02 |.........".3....|
  0020: ae e3 9c d1 00 00 00 02 d8 cb c6 1d 00 00 00 01 |................|
  0030: 58 97 36 a2 00 00 00 03 10 ff 58 95 00 00 00 04 |X.6.......X.....|
  0040: ee bb 94 44 00 00 00 02 5f 40 61 bb 00 00 00 02 |...D...._@a.....|
  0050: bf be 84 1b 00 00 00 02 d3 f1 63 45 80 00 00 02 |..........cE....|
  0060: e3 d4 9c 05 80 00 00 02 e2 3b 55 05 00 00 00 02 |.........;U.....|
  0070: f8 94 c2 56 80 00 00 03 f3 44 76 37 00 00 00 05 |...V.....Dv7....|
  0080: a5 8c a5 d3 00 00 00 05 df 34 3b 0d 00 00 00 05 |.........4;.....|
  0090: c9 14 c9 9f 00 00 00 06 cd 21 a8 0b 80 00 00 05 |.........!......|

no errors when revbranchcache is not writable

  $ echo >> .hg/cache/rbc-revs-v2
  $ mv .hg/cache/rbc-revs-v2 .hg/cache/rbc-revs-v2_
  $ mkdir .hg/cache/rbc-revs-v2
  $ rm -f .hg/cache/branch* && hg head a -T '{rev}\n'
  5
  $ rmdir .hg/cache/rbc-revs-v2
  $ mv .hg/cache/rbc-revs-v2_ .hg/cache/rbc-revs-v2

no errors when wlock cannot be acquired

#if unix-permissions
  $ mv .hg/cache/rbc-revs-v2 .hg/cache/rbc-revs-v2_
  $ rm -f .hg/cache/branch*
  $ chmod 555 .hg
  $ hg head a -T '{rev}\n'
  5
  $ chmod 755 .hg
  $ mv .hg/cache/rbc-revs-v2_ .hg/cache/rbc-revs-v2
#endif

dealing with valid cache revs file but for extra trailing data
--------------------------------------------------------------

When the trailing data are smaller than a record, they are practically
invisible to the cache and ignored. No warning is issued about them.

  $ echo '42' >> .hg/cache/rbc-revs-v2
  $ rm -f .hg/cache/branch* && hg head a -T '{rev}\n' --debug
  5
  $ f --size .hg/cache/rbc-revs*
  .hg/cache/rbc-revs-v2: size=164

When the trailing data are larger than a record, they are seens as extra
(probably invalid) data. We warn about them when writing.

  $ echo 'abracadabra!' >> .hg/cache/rbc-revs-v2
  $ rm -f .hg/cache/branch* && hg head a -T '{rev}\n' --debug
  5
  cache/rbc-revs-v2 contains 17 unknown trailing bytes
  $ f --size .hg/cache/rbc-revs*
  .hg/cache/rbc-revs-v2: size=177

recovery from invalid cache file with partial last record
---------------------------------------------------------
  $ mv .hg/cache/rbc-revs-v2 .
  $ f -qDB 119 rbc-revs-v2 > .hg/cache/rbc-revs-v2
  $ f --size .hg/cache/rbc-revs*
  .hg/cache/rbc-revs-v2: size=119
  $ rm -f .hg/cache/branch* && hg head a -T '{rev}\n' --debug
  5
  resetting content of cache/rbc-revs-v2
  $ f --size .hg/cache/rbc-revs*
  .hg/cache/rbc-revs-v2: size=160
  .hg/cache/rbc-revs-v2-*: size=119 (glob) (known-bad-output mmap windows !)

recovery from invalid cache file with missing record - no truncation
  $ mv .hg/cache/rbc-revs-v2 .
  $ f -qDB 112 rbc-revs-v2 > .hg/cache/rbc-revs-v2
  $ rm -f .hg/cache/branch* && hg head a -T '{rev}\n' --debug
  5
  $ f --size .hg/cache/rbc-revs*
  .hg/cache/rbc-revs-v2: size=160
  .hg/cache/rbc-revs-v2-*: size=119 (glob) (known-bad-output mmap windows !)

recovery from invalid cache file with some bad records
  $ mv .hg/cache/rbc-revs-v2 .
  $ f -qDB 8 rbc-revs-v2 > .hg/cache/rbc-revs-v2
  $ f --size .hg/cache/rbc-revs*
  .hg/cache/rbc-revs-v2: size=8
  .hg/cache/rbc-revs-v2-*: size=119 (glob) (known-bad-output mmap windows !)
  $ f -qDB 112 rbc-revs-v2 >> .hg/cache/rbc-revs-v2
  $ f --size .hg/cache/rbc-revs*
  .hg/cache/rbc-revs-v2: size=120
  .hg/cache/rbc-revs-v2-*: size=119 (glob) (known-bad-output mmap windows !)
  $ hg log -r 'branch(.)' -T '{rev} ' --debug
  history modification detected - truncating revision branch cache to revision * (glob)
  history modification detected - truncating revision branch cache to revision 1
  3 4 8 9 10 11 12 13 resetting content of cache/rbc-revs-v2
  $ rm -f .hg/cache/branch* && hg head a -T '{rev}\n' --debug
  5
  resetting content of cache/rbc-revs-v2
  $ f --size --hexdump --bytes=16 .hg/cache/rbc-revs*
  .hg/cache/rbc-revs-v2: size=160
  0000: 19 70 9c 5a 00 00 00 00 dd 6b 44 0d 00 00 00 01 |.p.Z.....kD.....|
  .hg/cache/rbc-revs-v2-*: size=119 (glob) (known-bad-output mmap windows !)
  0000: 19 70 9c 5a 00 00 00 00 dd 6b 44 0d 00 00 00 01 |.p.Z.....kD.....| (known-bad-output mmap windows !)

Smoothly reuse "v1" format if no v2 exists
------------------------------------------

read only operation with valid data
(actively rewrite data)

  $ rm .hg/cache/rbc-names-v2
  $ rm .hg/cache/rbc-revs-v2
  $ rm .hg/cache/branch*
  $ hg head a -T '{rev}\n' --debug
  5
  $ mv .hg/cache/rbc-names-v2 .hg/cache/rbc-names-v1
  $ mv .hg/cache/rbc-revs-v2 .hg/cache/rbc-revs-v1
  $ rm .hg/cache/branch*
  $ hg head a -T '{rev}\n' --debug
  5
  $ f --size .hg/cache/rbc-*-*
  .hg/cache/rbc-names-v1: size=92
  .hg/cache/rbc-names-v2: size=92
  .hg/cache/rbc-revs-v1: size=160
  .hg/cache/rbc-revs-v2: size=160
  .hg/cache/rbc-revs-v2-*: size=119 (glob) (known-bad-output mmap windows !)


Write operation write a full v2 files

  $ mv .hg/cache/rbc-names-v2 .hg/cache/rbc-names-v1
  $ mv .hg/cache/rbc-revs-v2 .hg/cache/rbc-revs-v1
  $ f --size .hg/cache/rbc-*
  .hg/cache/rbc-names-v1: size=92
  .hg/cache/rbc-revs-v1: size=160
  .hg/cache/rbc-revs-v2-*: size=119 (glob) (known-bad-output mmap windows !)
  $ hg branch not-here-for-long
  marked working directory as branch not-here-for-long
  $ hg ci -m not-long --debug
  reusing manifest from p1 (no file change)
  committing changelog
  updating the branch cache
  committed changeset * (glob)
  $ f --size .hg/cache/rbc-*
  .hg/cache/rbc-names-v1: size=92
  .hg/cache/rbc-names-v2: size=110
  .hg/cache/rbc-revs-v1: size=160
  .hg/cache/rbc-revs-v2: size=168
  .hg/cache/rbc-revs-v2-*: size=119 (glob) (known-bad-output mmap windows !)

So does explicit cache upgrade
  $ mv .hg/cache/rbc-names-v2 .hg/cache/rbc-names-v1
  $ mv .hg/cache/rbc-revs-v2 .hg/cache/rbc-revs-v1
  $ f --size .hg/cache/rbc-*
  .hg/cache/rbc-names-v1: size=110
  .hg/cache/rbc-revs-v1: size=168
  .hg/cache/rbc-revs-v2-*: size=119 (glob) (known-bad-output mmap windows !)
  $ hg debugupdatecache
  $ f --size .hg/cache/rbc-*
  .hg/cache/rbc-names-v1: size=110
  .hg/cache/rbc-names-v2: size=110
  .hg/cache/rbc-revs-v1: size=168
  .hg/cache/rbc-revs-v2: size=168
  .hg/cache/rbc-revs-v2-*: size=119 (glob) (known-bad-output mmap windows !)

With invalid v1 data, we rewrite it too (as v2)

  $ cp .hg/cache/rbc-names-v2 .hg/cache/rbc-names-v1
  $ mv .hg/cache/rbc-names-v2 .hg/cache/rbc-revs-v1
  $ rm .hg/cache/rbc-revs-v2
  $ rm .hg/cache/branch*
  $ 
  $ hg head a -T '{rev}\n' --debug
  history modification detected - truncating revision branch cache to revision 0
  5
  $ f --size .hg/cache/rbc-*-*
  .hg/cache/rbc-names-v1: size=110
  .hg/cache/rbc-names-v2: size=110
  .hg/cache/rbc-revs-v1: size=110
  .hg/cache/rbc-revs-v2: size=168
  .hg/cache/rbc-revs-v2-*: size=119 (glob) (known-bad-output mmap windows !)

cleanup

  $ hg up -qr '.^'
  $ hg rollback -qf
  $ rm .hg/cache/*
  $ hg debugupdatecache
  $ f --size .hg/cache/rbc-*
  .hg/cache/rbc-names-v2: size=92
  .hg/cache/rbc-revs-v2: size=160

cache is updated when committing
  $ hg branch i-will-regret-this
  marked working directory as branch i-will-regret-this
  $ hg ci -m regrets
  $ f --size .hg/cache/rbc-*
  .hg/cache/rbc-names-v2: size=111
  .hg/cache/rbc-revs-v2: size=168

update after rollback - the cache will be correct but rbc-names will will still
contain the branch name even though it no longer is used
  $ hg up -qr '.^'
  $ hg rollback -qf
  $ f --size .hg/cache/rbc-names-*
  .hg/cache/rbc-names-v2: size=111
  $ grep "i-will-regret-this" .hg/cache/rbc-names-* > /dev/null
  $ f --size .hg/cache/rbc-revs-*
  .hg/cache/rbc-revs-v2: size=168

cache is updated/truncated when stripping - it is thus very hard to get in a
situation where the cache is out of sync and the hash check detects it
  $ hg --config extensions.strip= strip -r tip --nob
  $ f --size .hg/cache/rbc-revs*
  .hg/cache/rbc-revs-v2: size=152

cache is rebuilt when corruption is detected
  $ echo > .hg/cache/rbc-names-v2
  $ hg log -r '5:&branch(.)' -T '{rev} ' --debug
  referenced branch names not found - rebuilding revision branch cache from scratch
  8 9 10 11 12 13 resetting content of rbc-names-v2
  $ f --size .hg/cache/rbc-names-*
  .hg/cache/rbc-names-v2: size=84
  $ grep "i-will-regret-this" .hg/cache/rbc-names-* > /dev/null
  [1]
  $ f --size .hg/cache/rbc-revs-*
  .hg/cache/rbc-revs-v2: size=152

Test that cache files are created and grows correctly:

  $ rm .hg/cache/rbc*
  $ hg log -r "5 & branch(5)" -T "{rev}\n"
  5

(here v3 is querying branch info for heads so it warm much more of the cache)

#if v2
  $ f --size .hg/cache/rbc-*
  .hg/cache/rbc-names-v2: size=1
  .hg/cache/rbc-revs-v2: size=48
#else
  $ f --size .hg/cache/rbc-*
  .hg/cache/rbc-names-v2: size=84
  .hg/cache/rbc-revs-v2: size=152
#endif

  $ cd ..

Test for multiple incorrect branch cache entries:

  $ hg init b
  $ cd b
  $ touch f
  $ hg ci -Aqmf
  $ echo >> f
  $ hg ci -Amf
  $ hg branch -q branch
  $ hg ci -Amf

#if v2

  $ f --size --sha256 .hg/cache/rbc-*
  .hg/cache/rbc-names-v2: size=14, sha256=d376f7eea9a7e28fac6470e78dae753c81a5543c9ad436e96999590e004a281c
  .hg/cache/rbc-revs-v2: size=24, sha256=ec89032fd4e66e7282cb6e403848c681a855a9c36c6b44d19179218553b78779

  $ : > .hg/cache/rbc-revs-v2

No superfluous rebuilding of cache:
  $ hg log -r "branch(null)&branch(branch)" --debug
  $ f --size --sha256 .hg/cache/rbc-*
  .hg/cache/rbc-names-v2: size=14, sha256=d376f7eea9a7e28fac6470e78dae753c81a5543c9ad436e96999590e004a281c
  .hg/cache/rbc-revs-v2: size=24, sha256=ec89032fd4e66e7282cb6e403848c681a855a9c36c6b44d19179218553b78779
#endif

  $ cd ..

Test to make sure that `--close-branch` only works on a branch head:
--------------------------------------------------------------------
  $ hg init closebranch
  $ cd closebranch
  $ for ch in a b c; do
  > echo $ch > $ch
  > hg add $ch
  > hg ci -m "added "$ch
  > done;

  $ hg up -r "desc('added b')"
  0 files updated, 0 files merged, 1 files removed, 0 files unresolved

trying to close branch from a cset which is not a branch head
it should abort:
  $ hg ci -m "closing branch" --close-branch
  abort: can only close branch heads
  (use --force-close-branch to close branch from a non-head changeset)
  [10]

  $ hg up 0
  0 files updated, 0 files merged, 1 files removed, 0 files unresolved
  $ hg log -GT "{rev}: {node|short} {desc|firstline}\n\t{branch}\n\n"
  o  2: 155349b645be added c
  |  	default
  |
  o  1: 5f6d8a4bf34a added b
  |  	default
  |
  @  0: 9092f1db7931 added a
     	default
  
Test --force-close-branch to close a branch from a non-head changeset:
---------------------------------------------------------------------

  $ hg show stack --config extensions.show=
    o  1553 added c
    o  5f6d added b
    @  9092 added a

  $ hg ci -m "branch closed" --close-branch
  abort: can only close branch heads
  (use --force-close-branch to close branch from a non-head changeset)
  [10]

  $ hg ci -m "branch closed" --force-close-branch
  created new head
  $ cd ..

Test various special cases for the branchmap
--------------------------------------------

Basic fork of the same branch

  $ hg init branchmap-testing1
  $ cd branchmap-testing1
  $ hg debugbuild '@A . :base . :p1 *base /p1'
  $ hg log -G
  o    changeset:   3:71ca9a6d524e
  |\   branch:      A
  | |  tag:         tip
  | |  parent:      2:a3b807b3ff0b
  | |  parent:      1:99ba08759bc7
  | |  user:        debugbuilddag
  | |  date:        Thu Jan 01 00:00:03 1970 +0000
  | |  summary:     r3
  | |
  | o  changeset:   2:a3b807b3ff0b
  | |  branch:      A
  | |  parent:      0:2ab8003a1750
  | |  user:        debugbuilddag
  | |  date:        Thu Jan 01 00:00:02 1970 +0000
  | |  summary:     r2
  | |
  o |  changeset:   1:99ba08759bc7
  |/   branch:      A
  |    tag:         p1
  |    user:        debugbuilddag
  |    date:        Thu Jan 01 00:00:01 1970 +0000
  |    summary:     r1
  |
  o  changeset:   0:2ab8003a1750
     branch:      A
     tag:         base
     user:        debugbuilddag
     date:        Thu Jan 01 00:00:00 1970 +0000
     summary:     r0
  
  $ hg branches
  A                              3:71ca9a6d524e
  $ hg clone -r 1 -r 2 . ../branchmap-testing1-clone
  adding changesets
  adding manifests
  adding file changes
  added 3 changesets with 0 changes to 0 files (+1 heads)
  new changesets 2ab8003a1750:a3b807b3ff0b
  updating to branch A
  0 files updated, 0 files merged, 0 files removed, 0 files unresolved
  $ cd ../branchmap-testing1-clone
  $ hg pull ../branchmap-testing1
  pulling from ../branchmap-testing1
  searching for changes
  adding changesets
  adding manifests
  adding file changes
  added 1 changesets with 0 changes to 0 files (-1 heads)
  new changesets 71ca9a6d524e
  (run 'hg update' to get a working copy)
  $ hg branches
  A                              3:71ca9a6d524e
  $ cd ..

Switching to a different branch and back

  $ hg init branchmap-testing2
  $ cd branchmap-testing2
  $ hg debugbuild '@A . @B . @A .'
  $ hg log -G
  o  changeset:   2:9699e9f260b5
  |  branch:      A
  |  tag:         tip
  |  user:        debugbuilddag
  |  date:        Thu Jan 01 00:00:02 1970 +0000
  |  summary:     r2
  |
  o  changeset:   1:0bc7d348d965
  |  branch:      B
  |  user:        debugbuilddag
  |  date:        Thu Jan 01 00:00:01 1970 +0000
  |  summary:     r1
  |
  o  changeset:   0:2ab8003a1750
     branch:      A
     user:        debugbuilddag
     date:        Thu Jan 01 00:00:00 1970 +0000
     summary:     r0
  
  $ hg branches
  A                              2:9699e9f260b5
  B                              1:0bc7d348d965 (inactive)
  $ hg clone -r 1 . ../branchmap-testing2-clone
  adding changesets
  adding manifests
  adding file changes
  added 2 changesets with 0 changes to 0 files
  new changesets 2ab8003a1750:0bc7d348d965
  updating to branch B
  0 files updated, 0 files merged, 0 files removed, 0 files unresolved
  $ cd ../branchmap-testing2-clone
  $ hg pull ../branchmap-testing2
  pulling from ../branchmap-testing2
  searching for changes
  adding changesets
  adding manifests
  adding file changes
  added 1 changesets with 0 changes to 0 files
  new changesets 9699e9f260b5
  (run 'hg update' to get a working copy)
  $ hg branches
  A                              2:9699e9f260b5
  B                              1:0bc7d348d965 (inactive)
  $ cd ..

A fork on a branch switching to a different branch and back
is still collecting the fork.

  $ hg init branchmap-testing3
  $ cd branchmap-testing3
  $ hg debugbuild '@A . :base . :p1 *base @B . @A /p1'
  $ hg log -G
  o    changeset:   4:3614a1711d23
  |\   branch:      A
  | |  tag:         tip
  | |  parent:      3:e9c8abcf65aa
  | |  parent:      1:99ba08759bc7
  | |  user:        debugbuilddag
  | |  date:        Thu Jan 01 00:00:04 1970 +0000
  | |  summary:     r4
  | |
  | o  changeset:   3:e9c8abcf65aa
  | |  branch:      B
  | |  user:        debugbuilddag
  | |  date:        Thu Jan 01 00:00:03 1970 +0000
  | |  summary:     r3
  | |
  | o  changeset:   2:a3b807b3ff0b
  | |  branch:      A
  | |  parent:      0:2ab8003a1750
  | |  user:        debugbuilddag
  | |  date:        Thu Jan 01 00:00:02 1970 +0000
  | |  summary:     r2
  | |
  o |  changeset:   1:99ba08759bc7
  |/   branch:      A
  |    tag:         p1
  |    user:        debugbuilddag
  |    date:        Thu Jan 01 00:00:01 1970 +0000
  |    summary:     r1
  |
  o  changeset:   0:2ab8003a1750
     branch:      A
     tag:         base
     user:        debugbuilddag
     date:        Thu Jan 01 00:00:00 1970 +0000
     summary:     r0
  
  $ hg branches
  A                              4:3614a1711d23
  B                              3:e9c8abcf65aa (inactive)
  $ hg clone -r 1 -r 3 . ../branchmap-testing3-clone
  adding changesets
  adding manifests
  adding file changes
  added 4 changesets with 0 changes to 0 files (+1 heads)
  new changesets 2ab8003a1750:e9c8abcf65aa
  updating to branch A
  0 files updated, 0 files merged, 0 files removed, 0 files unresolved
  $ cd ../branchmap-testing3-clone
  $ hg pull ../branchmap-testing3
  pulling from ../branchmap-testing3
  searching for changes
  adding changesets
  adding manifests
  adding file changes
  added 1 changesets with 0 changes to 0 files (-1 heads)
  new changesets 3614a1711d23
  (run 'hg update' to get a working copy)
  $ hg branches
  A                              4:3614a1711d23
  B                              3:e9c8abcf65aa (inactive)
  $ cd ..

Intermediary parents are on different branches.

  $ hg init branchmap-testing4
  $ cd branchmap-testing4
  $ hg debugbuild '@A . @B :base . @A :p1 *base @C . @A /p1'
  $ hg log -G
  o    changeset:   4:4bf67499b70a
  |\   branch:      A
  | |  tag:         tip
  | |  parent:      3:4a546028fa8f
  | |  parent:      1:0bc7d348d965
  | |  user:        debugbuilddag
  | |  date:        Thu Jan 01 00:00:04 1970 +0000
  | |  summary:     r4
  | |
  | o  changeset:   3:4a546028fa8f
  | |  branch:      C
  | |  user:        debugbuilddag
  | |  date:        Thu Jan 01 00:00:03 1970 +0000
  | |  summary:     r3
  | |
  | o  changeset:   2:a3b807b3ff0b
  | |  branch:      A
  | |  parent:      0:2ab8003a1750
  | |  user:        debugbuilddag
  | |  date:        Thu Jan 01 00:00:02 1970 +0000
  | |  summary:     r2
  | |
  o |  changeset:   1:0bc7d348d965
  |/   branch:      B
  |    tag:         p1
  |    user:        debugbuilddag
  |    date:        Thu Jan 01 00:00:01 1970 +0000
  |    summary:     r1
  |
  o  changeset:   0:2ab8003a1750
     branch:      A
     tag:         base
     user:        debugbuilddag
     date:        Thu Jan 01 00:00:00 1970 +0000
     summary:     r0
  
  $ hg branches
  A                              4:4bf67499b70a
  C                              3:4a546028fa8f (inactive)
  B                              1:0bc7d348d965 (inactive)
  $ hg clone -r 1 -r 3 . ../branchmap-testing4-clone
  adding changesets
  adding manifests
  adding file changes
  added 4 changesets with 0 changes to 0 files (+1 heads)
  new changesets 2ab8003a1750:4a546028fa8f
  updating to branch B
  0 files updated, 0 files merged, 0 files removed, 0 files unresolved
  $ cd ../branchmap-testing4-clone
  $ hg pull ../branchmap-testing4
  pulling from ../branchmap-testing4
  searching for changes
  adding changesets
  adding manifests
  adding file changes
  added 1 changesets with 0 changes to 0 files (-1 heads)
  new changesets 4bf67499b70a
  (run 'hg update' to get a working copy)
  $ hg branches
  A                              4:4bf67499b70a
  C                              3:4a546028fa8f (inactive)
  B                              1:0bc7d348d965 (inactive)
  $ cd ..

Check that the cache are not written too early
----------------------------------------------

  $ hg log -R branchmap-testing1 -G
  o    changeset:   3:71ca9a6d524e
  |\   branch:      A
  | |  tag:         tip
  | |  parent:      2:a3b807b3ff0b
  | |  parent:      1:99ba08759bc7
  | |  user:        debugbuilddag
  | |  date:        Thu Jan 01 00:00:03 1970 +0000
  | |  summary:     r3
  | |
  | o  changeset:   2:a3b807b3ff0b
  | |  branch:      A
  | |  parent:      0:2ab8003a1750
  | |  user:        debugbuilddag
  | |  date:        Thu Jan 01 00:00:02 1970 +0000
  | |  summary:     r2
  | |
  o |  changeset:   1:99ba08759bc7
  |/   branch:      A
  |    tag:         p1
  |    user:        debugbuilddag
  |    date:        Thu Jan 01 00:00:01 1970 +0000
  |    summary:     r1
  |
  o  changeset:   0:2ab8003a1750
     branch:      A
     tag:         base
     user:        debugbuilddag
     date:        Thu Jan 01 00:00:00 1970 +0000
     summary:     r0
  
  $ hg bundle -R branchmap-testing1 --base 1 bundle.hg --rev 'head()'
  2 changesets found

Unbundling revision should warm the served cache

  $ hg clone branchmap-testing1 --rev 1 branchmap-update-01
  adding changesets
  adding manifests
  adding file changes
  added 2 changesets with 0 changes to 0 files
  new changesets 2ab8003a1750:99ba08759bc7
  updating to branch A
  0 files updated, 0 files merged, 0 files removed, 0 files unresolved
#if v3
  $ cat branchmap-update-01/.hg/cache/branch3-exp-base
  tip-node=99ba08759bc7f6fdbe5304e83d0387f35c082479 tip-rev=1 topo-mode=pure
  A
#else
  $ cat branchmap-update-01/.hg/cache/branch2-base
  99ba08759bc7f6fdbe5304e83d0387f35c082479 1
  99ba08759bc7f6fdbe5304e83d0387f35c082479 o A
#endif
  $ hg -R branchmap-update-01 unbundle bundle.hg
  adding changesets
  adding manifests
  adding file changes
  added 2 changesets with 0 changes to 0 files
  new changesets a3b807b3ff0b:71ca9a6d524e (2 drafts)
  (run 'hg update' to get a working copy)
#if v3
  $ cat branchmap-update-01/.hg/cache/branch3-exp-served
  tip-node=71ca9a6d524ed3c2a215119b2086ac3b8c4c8286 tip-rev=3 topo-mode=pure
  A
#else
  $ cat branchmap-update-01/.hg/cache/branch2-served
  71ca9a6d524ed3c2a215119b2086ac3b8c4c8286 3
  71ca9a6d524ed3c2a215119b2086ac3b8c4c8286 o A
#endif

aborted Unbundle should not update the on disk cache

  $ cat >> simplehook.py << EOF
  > import sys
  > from mercurial import node
  > from mercurial import branchmap
  > def hook(ui, repo, *args, **kwargs):
  >     s = repo.filtered(b"served")
  >     s.branchmap()
  >     return 1
  > EOF
  $ hg clone branchmap-testing1 --rev 1 branchmap-update-02
  adding changesets
  adding manifests
  adding file changes
  added 2 changesets with 0 changes to 0 files
  new changesets 2ab8003a1750:99ba08759bc7
  updating to branch A
  0 files updated, 0 files merged, 0 files removed, 0 files unresolved

#if v3
  $ cat branchmap-update-02/.hg/cache/branch3-exp-base
  tip-node=99ba08759bc7f6fdbe5304e83d0387f35c082479 tip-rev=1 topo-mode=pure
  A
#else
  $ cat branchmap-update-02/.hg/cache/branch2-base
  99ba08759bc7f6fdbe5304e83d0387f35c082479 1
  99ba08759bc7f6fdbe5304e83d0387f35c082479 o A
#endif
  $ hg -R branchmap-update-02 unbundle bundle.hg --config "hooks.pretxnclose=python:$TESTTMP/simplehook.py:hook"
  adding changesets
  adding manifests
  adding file changes
  transaction abort!
  rollback completed
  abort: pretxnclose hook failed
  [40]
#if v3
  $ cat branchmap-update-02/.hg/cache/branch3-exp-base
  tip-node=99ba08759bc7f6fdbe5304e83d0387f35c082479 tip-rev=1 topo-mode=pure
  A
#else
  $ cat branchmap-update-02/.hg/cache/branch2-base
  99ba08759bc7f6fdbe5304e83d0387f35c082479 1
  99ba08759bc7f6fdbe5304e83d0387f35c082479 o A
#endif