In Mercurial, why can't we undo commit when there are other modified files?

Question

Yesterday I made a file and then wanted hg backout, but Mercurial says it cannot back off because I have other modified files in the project ...

This is a bit strange ... is this not an atomic level for every file? Commit file 1 and then backup file 1?

Secondly, I can save a copy of these modified files A, B, C, tmp, hg to return them, and then back up and then copy these tmp files back to A, B, C and it will not be the same as only hg backout, which the latter does, but only works more?

Answer 1

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hg diff > tmp
hg revert --all
# working directory is now clean, do your merge/backout/...
hg import --no-commit tmp

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Answer 2

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