$ cat <<EOF >> $HGRCPATH

  > [extensions]

  > convert =

  > [convert]

  > hg.tagsbranch = 0

  > EOF

  $ hg init source

  $ cd source

  $ echo a > a

  $ hg ci -qAm adda

Add a merge with one parent in the same branch

  $ echo a >> a

  $ hg ci -qAm changea

  $ hg up -qC 0

  $ hg branch branch0

  marked working directory as branch branch0

  (branches are permanent and global, did you want a bookmark?)

  $ echo b > b

  $ hg ci -qAm addb

  $ hg up -qC

  $ hg merge default

  1 files updated, 0 files merged, 0 files removed, 0 files unresolved

  (branch merge, don't forget to commit)

  $ hg ci -qm mergeab

  $ hg tag -ql mergeab

  $ cd ..

Miss perl... sometimes

  $ cat > filter.py <<EOF

  > import re

  > import sys

  > 

  > r = re.compile(r'^(?:\d+|pulling from)')

  > sys.stdout.writelines([l for l in sys.stdin if r.search(l)])

  > EOF

convert

  $ hg convert -v --config convert.hg.clonebranches=1 source dest |

  >     "$PYTHON" filter.py

  3 adda

  2 changea

  1 addb

  pulling from default into branch0

  1 changesets found

  0 mergeab

  pulling from default into branch0

  1 changesets found

Add a merge with both parents and child in different branches

  $ cd source

  $ hg branch branch1

  marked working directory as branch branch1

  $ echo a > file1

  $ hg ci -qAm c1

  $ hg up -qC mergeab

  $ hg branch branch2

  marked working directory as branch branch2

  $ echo a > file2

  $ hg ci -qAm c2

  $ hg merge branch1

  1 files updated, 0 files merged, 0 files removed, 0 files unresolved

  (branch merge, don't forget to commit)

  $ hg branch branch3

  marked working directory as branch branch3

  $ hg ci -qAm c3

  $ cd ..

incremental conversion

  $ hg convert -v --config convert.hg.clonebranches=1 source dest |

  >     "$PYTHON" filter.py

  2 c1

  pulling from branch0 into branch1

  4 changesets found

  1 c2

  pulling from branch0 into branch2

  4 changesets found

  0 c3

  pulling from branch1 into branch3

  5 changesets found

  pulling from branch2 into branch3

  1 changesets found