Scan commits by date range

commits_on_day.sh

#!/usr/bin/env bash
# Finds all commits in all repositories under PWD
# across the given time range
# Ex. ./commits_on_day.sh 2024-01-01 2024-01-30

set -e

DATE="$1"
END_DATE="${2:-$1}"

# Note: .git in git submodules is actually a file
REPOS=$(find . -name .git -prune | sed 's/\.git//g')

while ! [[ "$DATE" > "$END_DATE" ]]; do 
  echo "$DATE"
  PREV_DATE=$(date +%Y-%m-%d -d "$DATE - 1 day")
  NEXT_DATE=$(date +%Y-%m-%d -d "$DATE + 1 day")

  for repo in $REPOS; do (
    cd "$repo";
    RESP=$(
      git log --pretty=format:"    %ad - %an: %s" \
              --after="$PREV_DATE" \
              --until="$DATE" 2>/dev/null \
              || true
    )
    if [ ! -z "$RESP" ]; then
      echo "  in $repo"
      echo "$RESP"
    fi
  ); done

  DATE=$NEXT_DATE
done