$ HGMERGE=true; export HGMERGE

  $ echo '[extensions]' >> $HGRCPATH

  $ echo 'graphlog =' >> $HGRCPATH

  $ echo 'convert =' >> $HGRCPATH

  $ glog()

  > {

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

  > }

  $ hg init source

  $ cd source

  $ echo foo > foo

  $ echo baz > baz

  $ mkdir -p dir/subdir

  $ echo dir/file >> dir/file

  $ echo dir/file2 >> dir/file2

  $ echo dir/subdir/file3 >> dir/subdir/file3

  $ echo dir/subdir/file4 >> dir/subdir/file4

  $ hg ci -d '0 0' -qAm '0: add foo baz dir/'

  $ echo bar > bar

  $ echo quux > quux

  $ hg copy foo copied

  $ hg ci -d '1 0' -qAm '1: add bar quux; copy foo to copied'

  $ echo >> foo

  $ hg ci -d '2 0' -m '2: change foo'

  $ hg up -qC 1

  $ echo >> bar

  $ echo >> quux

  $ hg ci -d '3 0' -m '3: change bar quux'

  created new head

  $ hg up -qC 2

  $ hg merge -qr 3

  $ echo >> bar

  $ echo >> baz

  $ hg ci -d '4 0' -m '4: first merge; change bar baz'

  $ echo >> bar

  $ echo 1 >> baz

  $ echo >> quux

  $ hg ci -d '5 0' -m '5: change bar baz quux'

  $ hg up -qC 4

  $ echo >> foo

  $ echo 2 >> baz

  $ hg ci -d '6 0' -m '6: change foo baz'

  created new head

  $ hg up -qC 5

  $ hg merge -qr 6

  $ echo >> bar

  $ hg ci -d '7 0' -m '7: second merge; change bar'

  $ echo >> foo

  $ hg ci -m '8: change foo'

  $ glog

  @  8 "8: change foo" files: foo

  |

  o    7 "7: second merge; change bar" files: bar baz

  |\

  | o  6 "6: change foo baz" files: baz foo

  | |

  o |  5 "5: change bar baz quux" files: bar baz quux

  |/

  o    4 "4: first merge; change bar baz" files: bar baz

  |\

  | o  3 "3: change bar quux" files: bar quux

  | |

  o |  2 "2: change foo" files: foo

  |/

  o  1 "1: add bar quux; copy foo to copied" files: bar copied quux

  |

  o  0 "0: add foo baz dir/" files: baz dir/file dir/file2 dir/subdir/file3 dir/subdir/file4 foo

final file versions in this repo:

  $ hg manifest --debug

  9463f52fe115e377cf2878d4fc548117211063f2 644   bar

  94c1be4dfde2ee8d78db8bbfcf81210813307c3d 644   baz

  7711d36246cc83e61fb29cd6d4ef394c63f1ceaf 644   copied

  3e20847584beff41d7cd16136b7331ab3d754be0 644   dir/file

  75e6d3f8328f5f6ace6bf10b98df793416a09dca 644   dir/file2

  5fe139720576e18e34bcc9f79174db8897c8afe9 644   dir/subdir/file3

  57a1c1511590f3de52874adfa04effe8a77d64af 644   dir/subdir/file4

  9a7b52012991e4873687192c3e17e61ba3e837a3 644   foo

  bc3eca3f47023a3e70ca0d8cc95a22a6827db19d 644   quux

  $ hg debugrename copied

  copied renamed from foo:2ed2a3912a0b24502043eae84ee4b279c18b90dd

  $ echo

  $ cd ..

  $ splitrepo()

  > {

  >     msg="$1"

  >     files="$2"

  >     opts=$3

  >     echo "% $files: $msg"

  >     prefix=`echo "$files" | sed -e 's/ /-/g'`

  >     fmap="$prefix.fmap"

  >     repo="$prefix.repo"

  >     for i in $files; do

  > 	echo "include $i" >> "$fmap"

  >     done

  >     hg -q convert $opts --filemap "$fmap" --datesort source "$repo"

  >     hg up -q -R "$repo"

  >     glog -R "$repo"

  >     hg -R "$repo" manifest --debug

  > }

  $ splitrepo 'skip unwanted merges; use 1st parent in 1st merge, 2nd in 2nd' foo

  % foo: skip unwanted merges; use 1st parent in 1st merge, 2nd in 2nd

  @  3 "8: change foo" files: foo

  |

  o  2 "6: change foo baz" files: foo

  |

  o  1 "2: change foo" files: foo

  |

  o  0 "0: add foo baz dir/" files: foo

  9a7b52012991e4873687192c3e17e61ba3e837a3 644   foo

  $ splitrepo 'merges are not merges anymore' bar

  % bar: merges are not merges anymore

  @  4 "7: second merge; change bar" files: bar

  |

  o  3 "5: change bar baz quux" files: bar

  |

  o  2 "4: first merge; change bar baz" files: bar

  |

  o  1 "3: change bar quux" files: bar

  |

  o  0 "1: add bar quux; copy foo to copied" files: bar

  9463f52fe115e377cf2878d4fc548117211063f2 644   bar

  $ splitrepo '1st merge is not a merge anymore; 2nd still is' baz

  % baz: 1st merge is not a merge anymore; 2nd still is

  @    4 "7: second merge; change bar" files: baz

  |\

  | o  3 "6: change foo baz" files: baz

  | |

  o |  2 "5: change bar baz quux" files: baz

  |/

  o  1 "4: first merge; change bar baz" files: baz

  |

  o  0 "0: add foo baz dir/" files: baz

  94c1be4dfde2ee8d78db8bbfcf81210813307c3d 644   baz

  $ splitrepo 'we add additional merges when they are interesting' 'foo quux'

  % foo quux: we add additional merges when they are interesting

  @  8 "8: change foo" files: foo

  |

  o    7 "7: second merge; change bar" files:

  |\

  | o  6 "6: change foo baz" files: foo

  | |

  o |  5 "5: change bar baz quux" files: quux

  |/

  o    4 "4: first merge; change bar baz" files:

  |\

  | o  3 "3: change bar quux" files: quux

  | |

  o |  2 "2: change foo" files: foo

  |/

  o  1 "1: add bar quux; copy foo to copied" files: quux

  |

  o  0 "0: add foo baz dir/" files: foo

  9a7b52012991e4873687192c3e17e61ba3e837a3 644   foo

  bc3eca3f47023a3e70ca0d8cc95a22a6827db19d 644   quux

  $ splitrepo 'partial conversion' 'bar quux' '-r 3'

  % bar quux: partial conversion

  @  1 "3: change bar quux" files: bar quux

  |

  o  0 "1: add bar quux; copy foo to copied" files: bar quux

  b79105bedc55102f394e90a789c9c380117c1b4a 644   bar

  db0421cc6b685a458c8d86c7d5c004f94429ea23 644   quux

  $ splitrepo 'complete the partial conversion' 'bar quux'

  % bar quux: complete the partial conversion

  @  4 "7: second merge; change bar" files: bar

  |

  o  3 "5: change bar baz quux" files: bar quux

  |

  o  2 "4: first merge; change bar baz" files: bar

  |

  o  1 "3: change bar quux" files: bar quux

  |

  o  0 "1: add bar quux; copy foo to copied" files: bar quux

  9463f52fe115e377cf2878d4fc548117211063f2 644   bar

  bc3eca3f47023a3e70ca0d8cc95a22a6827db19d 644   quux

  $ rm -r foo.repo

  $ splitrepo 'partial conversion' 'foo' '-r 3'

  % foo: partial conversion

  @  0 "0: add foo baz dir/" files: foo

  2ed2a3912a0b24502043eae84ee4b279c18b90dd 644   foo

  $ splitrepo 'complete the partial conversion' 'foo'

  % foo: complete the partial conversion

  @  3 "8: change foo" files: foo

  |

  o  2 "6: change foo baz" files: foo

  |

  o  1 "2: change foo" files: foo

  |

  o  0 "0: add foo baz dir/" files: foo

  9a7b52012991e4873687192c3e17e61ba3e837a3 644   foo

  $ splitrepo 'copied file; source not included in new repo' copied

  % copied: copied file; source not included in new repo

  @  0 "1: add bar quux; copy foo to copied" files: copied

  2ed2a3912a0b24502043eae84ee4b279c18b90dd 644   copied

  $ hg --cwd copied.repo debugrename copied

  copied not renamed

  $ splitrepo 'copied file; source included in new repo' 'foo copied'

  % foo copied: copied file; source included in new repo

  @  4 "8: change foo" files: foo

  |

  o  3 "6: change foo baz" files: foo

  |

  o  2 "2: change foo" files: foo

  |

  o  1 "1: add bar quux; copy foo to copied" files: copied

  |

  o  0 "0: add foo baz dir/" files: foo

  7711d36246cc83e61fb29cd6d4ef394c63f1ceaf 644   copied

  9a7b52012991e4873687192c3e17e61ba3e837a3 644   foo

  $ hg --cwd foo-copied.repo debugrename copied

  copied renamed from foo:2ed2a3912a0b24502043eae84ee4b279c18b90dd

  $ cat > renames.fmap <<EOF

  > include dir

  > exclude dir/file2

  > rename dir dir2

  > include foo

  > include copied

  > rename foo foo2

  > rename copied copied2

  > exclude dir/subdir

  > include dir/subdir/file3

  > EOF

  $ hg -q convert --filemap renames.fmap --datesort source renames.repo

  $ hg up -q -R renames.repo

  $ glog -R renames.repo

  @  4 "8: change foo" files: foo2

  |

  o  3 "6: change foo baz" files: foo2

  |

  o  2 "2: change foo" files: foo2

  |

  o  1 "1: add bar quux; copy foo to copied" files: copied2

  |

  o  0 "0: add foo baz dir/" files: dir2/file dir2/subdir/file3 foo2

  $ hg -R renames.repo manifest --debug

  d43feacba7a4f1f2080dde4a4b985bd8a0236d46 644   copied2

  3e20847584beff41d7cd16136b7331ab3d754be0 644   dir2/file

  5fe139720576e18e34bcc9f79174db8897c8afe9 644   dir2/subdir/file3

  9a7b52012991e4873687192c3e17e61ba3e837a3 644   foo2

  $ hg --cwd renames.repo debugrename copied2

  copied2 renamed from foo2:2ed2a3912a0b24502043eae84ee4b279c18b90dd

copied:

  $ hg --cwd source cat copied

  foo

copied2:

  $ hg --cwd renames.repo cat copied2

  foo

filemap errors

  $ cat > errors.fmap <<EOF

  > include dir/ # beware that comments changes error line numbers!

  > exclude /dir

  > rename dir//dir /dir//dir/ "out of sync"

  > include

  > EOF

  $ hg -q convert --filemap errors.fmap source errors.repo

  errors.fmap:1: superfluous / in exclude 'dir/'

  errors.fmap:3: superfluous / in include '/dir'

  errors.fmap:3: superfluous / in rename '/dir'

  errors.fmap:3: superfluous / in exclude 'dir//dir'

  errors.fmap:4: unknown directive 'out of sync'

  errors.fmap:5: path to exclude is missing

  abort: errors in filemap

  [255]