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How do I check the syntax of a Git mailmap file after adding/removing records? I want to make sure each line represents a valid mapping and not some garbage.

planetp
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1 Answers1

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You can compare the (sorted) list of the repo's authors with / without .mailmap with

git log --all --pretty=format:"%aN %aE" | sort -u

and 

git log --all --pretty=format:"%an %ae" | sort -u

The first list should be taking your .mailmap into account and transform names/e-mails (provided you've set your config right with git config --global log.mailmap true), while the other uses raw commit data.

Romain Valeri
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  • I just need to check if the file has valid syntax (with pointers to invalid lines, if any). How this approach would help? – planetp Oct 24 '19 at 12:31
  • Hmm, I might have misunderstood your needs, I thought you were trying to spot potentially remaining untransformed names/emails... but you're right, there should be an easier way to just do a formal syntax check. – Romain Valeri Oct 24 '19 at 12:56