TODO

verify that base is committish
--drop-file-changes (since committish)
in performOpDeleteFile, batch files together by commits - reduce O(N*M) (N=files.length, M=commits[i].length for file i) rebases to O(max(M))
- allow specifying --delete-files nobatch:a,b,c,batch:d,e,f,nobatch:g,h,batch:i,j,j,l, and/or multiple --delete-files flags, for overriding behavior
- once becomes default, have separate flag --[no-]batch-files, to disable/re-enable for all
allow performing "automatable actions", e.g. :%s/ /\t/g
allow configuring what to do when a commit becomes empty due to our actions
--file-history a,b,c,d to list file histories
- print file, then print list of commits, with extra info (subject, rename info if renamed, etc)
integrate range-diff (rebase-diff?)
progress-tracking in .git/reverse-rebase/ dir
- allow --aborting to orig if pause/failure
op --rename-file
misc: rename var dropEmpty to dropEmptyCommits
misc: rename file operation to op-delete-files (and var performOpDeleteFile to performOpDeleteFiles)
fix --drop-empty not removing all empty commits
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