$ cat >> $HGRCPATH <<EOF

  > [extensions]

  > convert =

  > [convert]

  > hg.saverev = yes

  > EOF

  $ glog()

  > {

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

  > }

  $ hg init source

  $ cd source

  $ echo a > a

  $ echo b > b

  $ echo f > f

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

  $ echo c > c

  $ hg move f d

  $ hg ci -d '1 0' -qAm '1: add c, move f to d'

  $ hg copy a e

  $ echo b >> b

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

  $ hg up -C 0

  2 files updated, 0 files merged, 3 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

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

  (branch merge, don't forget to commit)

  $ hg ci -d '4 0' -qAm '4: merge 2 and 3'

  $ 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 full

  initializing destination full repository

  scanning source...

  sorting...

  converting...

  5 0: add a b f

  4 1: add c, move f to d

  3 2: copy e from a, change b

  2 3: change a

  1 4: merge 2 and 3

  0 5: change a

  $ glog full

  o  5 "5: change a" files: a

  |

  o    4 "4: merge 2 and 3" files: 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, move f to d" files: c d f

  |/

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

  $ rm -Rf full

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 f

  4 1: add c, move f to d

  3 2: copy e from a, change b

  2 3: change a

  1 4: merge 2 and 3

  0 5: change a

  $ glog full

  o  5 "5: change a" files: a

  |

  o    4 "4: merge 2 and 3" files: 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, move f to d" files: c d f

  |/

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

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, move f to d

  2 2: copy e from a, change b

  1 4: merge 2 and 3

  0 5: change a

  $ glog conv1

  o  3 "5: change a" files: a

  |

  o  2 "4: merge 2 and 3" files: a e

  |

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

  |

  o  0 "1: add c, move f to d" files: a b c d

  $ cd conv1

  $ hg up -q

Check copy preservation

  $ hg st -C --change 2 e

  M e

  $ hg st -C --change 1 e

  A e

    a

  $ hg st -C --change 0 a

  A a

(It seems like a bug in log that the following doesn't show rev 1.)

  $ hg log --follow --copies e

  changeset:   2:8d3c3fe67bb7

  user:        test

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

  summary:     4: merge 2 and 3

  changeset:   0:23c3be426dce

  user:        test

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

  summary:     1: add c, move f to d

Check copy removal on missing parent

  $ hg log --follow --copies d

  changeset:   0:23c3be426dce

  user:        test

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

  summary:     1: add c, move f to d

  $ 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

  0 5: change a

  $ glog conv4

  o  1 "5: change a" files: a

  |

  o  0 "4: merge 2 and 3" 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 ..

Convert from revset in convert.hg.revs

  $ hg convert --config convert.hg.revs='3:4+0' source revsetrepo

  initializing destination revsetrepo repository

  scanning source...

  sorting...

  converting...

  2 0: add a b f

  1 3: change a

  0 4: merge 2 and 3

  $ glog revsetrepo

  o  2 "4: merge 2 and 3" files: b c d e f

  |

  o  1 "3: change a" files: a

  |

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

Convert from specified revs

  $ hg convert --rev 3 --rev 2 source multiplerevs

  initializing destination multiplerevs repository

  scanning source...

  sorting...

  converting...

  3 0: add a b f

  2 1: add c, move f to d

  1 2: copy e from a, change b

  0 3: change a

  $ glog multiplerevs

  o  3 "3: change a" files: a

  |

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

  | |

  | o  1 "1: add c, move f to d" files: c d f

  |/

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

Convert in multiple steps that doesn't overlap - the link to the parent is

preserved anyway

  $ hg convert --config convert.hg.revs=::1 source multistep

  initializing destination multistep repository

  scanning source...

  sorting...

  converting...

  1 0: add a b f

  0 1: add c, move f to d

  $ hg convert --config convert.hg.revs=2 source multistep

  scanning source...

  sorting...

  converting...

  0 2: copy e from a, change b

  $ glog multistep

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

  |

  o  1 "1: add c, move f to d" files: c d f

  |

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