convert: readd --filemap To handle merges correctly, this revision adds a filemap_source class that wraps a converter_source and does the work necessary to calculate the subgraph we're interested in. The wrapped converter_source must provide a new getchangedfiles method that, given a revision rev, and an index N, returns the list of files that are different in rev and its Nth parent. The implementation depends on the ability to skip some revisions and to change the parents field of the commit objects that we returned earlier. To make the conversion restartable, we assume the revisons in the revmapfile are topologically sorted.

adding bar
adding foo
adding quux1
adding quux2
merging bar
merging bar failed!
merging foo and baz
merging baz failed!
1 files updated, 0 files merged, 0 files removed, 2 files unresolved
There are unresolved merges, you can redo the full merge using:
  hg update -C 2
  hg merge 1
3 files updated, 0 files merged, 1 files removed, 0 files unresolved
merging bar
merging bar failed!
merging baz and foo
merging baz failed!
1 files updated, 0 files merged, 0 files removed, 2 files unresolved
There are unresolved merges, you can redo the full merge using:
  hg update -C 1
  hg merge 2