bash script to convert archives to git tree

gitify.sh

#!/usr/bin/sh

set -o errexit

archdir=$(pwd)/arch-to-git/archives
repodir=$(pwd)/arch-to-git/repo
mkdir -p "$archdir" "$repodir"

pushd "$archdir"

touch junk.exe trash.cab

echo 'revision one' > data.txt
zip -q 'archive one' data* junk* trash*
echo 'revision two' >> data.txt
zip -q 'archive two' data* junk* trash*
echo 'revision three' >> data.txt
zip -q 'archive three' data* junk* trash*

rm data* junk* trash*


touch 'archive one.zip'   --date='2016-03-01 -13 days'
touch 'archive two.zip'   --date='2016-03-01 -12 days'
touch 'archive three.zip' --date='2016-03-01 -11 days'

find . -type f -name '*.zip' -printf "%T@\t%P\n" | sort >manifest.tsv
delim=$'\t'

popd

pushd "$repodir"
git init
printf '*.exe\n*.cab' > .gitignore
git add .gitignore
git commit -m 'first commit; adding gitignore'

author='--author="joe <joe@company.org>"'
cutoff='archive three.zip'
while IFS=$delim read backdate archname; do
  [ "$archname" = "$cutoff" ] && author=
  unzip -q "$archdir/$archname"
  git add --all
  git commit -m "from archive: $archname" --date="$backdate" "$author"
  mv .git .gitignore ..
  rm -rf ./*
  mv ../.git ../.gitignore .
  echo
done <"$archdir/manifest.tsv"
git checkout -- .

git --no-pager log --reverse --format='%h %ad %an "%s"'
popd