git-search.sh

#!/usr/bin/env bash

if [ $# -ne 1 ]; then
  echo "Usage: $0 YYYY-MM-DD"
  exit 1
fi

TARGET_DATE=$1

if ! [[ $TARGET_DATE =~ ^[0-9]{4}-[0-9]{2}-[0-9]{2}$ ]]; then
  echo "Error: Date must be in format YYYY-MM-DD"
  exit 1
fi

START_DATE="${TARGET_DATE}T00:00:00"
END_DATE="${TARGET_DATE}T23:59:59"

echo "Searching for commits on ${TARGET_DATE} in $(pwd) repositories...\n"

find . -type d -name ".git" | while read -r gitdir; do
  repo_dir="$(dirname "$gitdir")"

  cd "$repo_dir" || continue
  
  commits=$(git log --all --format="%H %ai %s" --after="${START_DATE}" --before="${END_DATE}")
  
  if [ -n "$commits" ]; then
    echo "Found in $repo_dir"
    echo "$commits"
  fi
  
  cd - > /dev/null
done