Automatically do renaming of references to commits that were skipped, and
automatically remove skipped blobs from the output of commits that
reference them.
pyparsing sucks a whole file into memory at a time and then parses, which
is really bad in this case since the output from git-fast-export is huge.
I entered disk swapping madness pretty easily. So, now I just do my own
manual parsing.
* Allow hooking up (and filtering) multiple git fast-export's to one import
* Allow user callbacks to force dumping of object in order to reference it
with subsequent inserted objects
* Put the separate callbacks and global vars in the calling program into a
combined class
My prior handlings of marks would only work if there were not additions
or removals from the fast-export stream. Further, I referred to these as
marks even though I really only accept idnum values, not sha1s or anything
else. So, now I refer to these as ids everywhere, and I am much more
careful in my handling of ids.
The commit_callback call was trying to pass a Reset object, which was
not defined. Copy-n-paste-n-forget-to-replace isn't good. Now it passes
a Commit object.
