git log for all subfolders

git.sh

#!/bin/bash
AUTHOR=$(git config user.name)
DATE=$1
echo "folder;date;comment"
for D in *; do
    if [ -d "${D}" ]; then
    # echo $D
    cd $D
    git log \
      --no-merges \
      --format="%cd" \
      --date=short \
      --no-merges \
      --since=$DATE \
      --author="$AUTHOR" \
      --all | sort -u -r | while read DATE ; do
        GIT_PAGER=cat git log \
          --no-merges \
          --format="$D;%ci;%s" \
          --since=$DATE \
          --until=$NEXT \
          --author="$AUTHOR" \
          --all
        NEXT=$DATE
      done
    cd ..
    fi
done

Usage: $ sh git.sh "2019-10-01" > october.csv