$ cat > $HGRCPATH <<EOF

  > [extensions]

  > graphlog =

  > convert =

  > EOF

  $ glog()

  > {

  >     hg -R "$1" glog --template '{rev} "{desc}" files: {files}\n'

  > }

  $ hg init source

  $ cd source

  $ echo a > a

  $ echo b > b

  $ hg ci -d '0 0' -qAm '0: add a b'

  $ echo c > c

  $ hg ci -d '1 0' -qAm '1: add c'

  $ hg copy a e

  $ echo b >> b

  $ hg ci -d '2 0' -qAm '2: copy e from a, change b'

  $ hg up -C 0

  1 files updated, 0 files merged, 2 files removed, 0 files unresolved

  $ echo a >> a

  $ hg ci -d '3 0' -qAm '3: change a'

  $ hg merge

  merging a and e to e

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

  (branch merge, don't forget to commit)

  $ hg copy b d

  $ hg ci -d '4 0' -qAm '4: merge 2 and 3, copy d from b'

  $ echo a >> a

  $ hg ci -d '5 0' -qAm '5: change a'

  $ cd ..

Convert from null revision

  $ hg convert --config convert.hg.startrev=null source empty

  initializing destination empty repository

  scanning source...

  sorting...

  converting...

  $ glog empty

Convert from zero revision

  $ hg convert --config convert.hg.startrev=0 source full

  initializing destination full repository

  scanning source...

  sorting...

  converting...

  5 0: add a b

  4 1: add c

  3 2: copy e from a, change b

  2 3: change a

  1 4: merge 2 and 3, copy d from b

  0 5: change a

  $ glog full

  o  5 "5: change a" files: a

  |

  o    4 "4: merge 2 and 3, copy d from b" files: d e

  |\

  | o  3 "3: change a" files: a

  | |

  o |  2 "2: copy e from a, change b" files: b e

  | |

  o |  1 "1: add c" files: c

  |/

  o  0 "0: add a b" files: a b

Convert from merge parent

  $ hg convert --config convert.hg.startrev=1 source conv1

  initializing destination conv1 repository

  scanning source...

  sorting...

  converting...

  3 1: add c

  2 2: copy e from a, change b

  1 4: merge 2 and 3, copy d from b

  0 5: change a

  $ glog conv1

  o  3 "5: change a" files: a

  |

  o  2 "4: merge 2 and 3, copy d from b" files: a d e

  |

  o  1 "2: copy e from a, change b" files: b e

  |

  o  0 "1: add c" files: a b c

  $ cd conv1

Check copy preservation

  $ hg log --follow --copies e

  user:        test

  date:        Thu Jan 01 00:00:04 1970 +0000

  summary:     4: merge 2 and 3, copy d from b

  user:        test

  date:        Thu Jan 01 00:00:02 1970 +0000

  summary:     2: copy e from a, change b

Check copy removal on missing parent

  $ hg log --follow --copies d

  user:        test

  date:        Thu Jan 01 00:00:04 1970 +0000

  summary:     4: merge 2 and 3, copy d from b

  $ hg cat -r tip a b

  a

  a

  a

  b

  b

  $ hg -q verify

  $ cd ..

Convert from merge

  $ hg convert --config convert.hg.startrev=4 source conv4

  initializing destination conv4 repository

  scanning source...

  sorting...

  converting...

  1 4: merge 2 and 3, copy d from b

  0 5: change a

  $ glog conv4

  o  1 "5: change a" files: a

  |

  o  0 "4: merge 2 and 3, copy d from b" files: a b c d e

  $ cd conv4

  $ hg up -C

  5 files updated, 0 files merged, 0 files removed, 0 files unresolved

  $ hg cat -r tip a b

  a

  a

  a

  b

  b

  $ hg -q verify

  $ cd ..