fixup-authorless-commits

#!/bin/bash -ev
rm -f loggood
rm -f logall
for TAG in $(git tag) ; do
    git log --pretty=format:"%H" --author="" $TAG >> loggood
    #git log doesn't seem to add a final newline, add one ourselves
    echo >> loggood
    git log --pretty=format:"%H" $TAG >> logall
    echo >> logall
done

LC_ALL=C cat loggood | sort | uniq | sponge loggood
LC_ALL=C cat logall | sort | uniq | sponge logall
LC_ALL=C comm -13 loggood logall > logbad

BAD_FOUND=false

for COMMIT in $(cat logbad) ; do
    git checkout $COMMIT
    git commit --amend --reset-author --no-edit
    git replace $COMMIT $(git log --pretty=format:"%H" -n 1)
    BAD_FOUND=true
done

if [ $BAD_FOUND = true ] ; then
    git filter-branch -f -- --all
    
    for COMMIT in $(cat logbad) ; do
        git replace -d $COMMIT
    done
fi