annual_review.sh

#!/usr/bin/env bash
set -e

AUTHOR="Robert J."
GIT_DIR="$HOME/Git"

print(){
    var="$1";
    size="${#var}";
    printf -v sep "%${size}s" "-";
    printf "\n%s\n%s\n" "$var" "${sep// /-}"
}

while read -r REPO; do
    print "${REPO%%.git*}"
    cd "${REPO%%.git*}" || exit
    COMMITS="$(git log --author="$AUTHOR" --after="1 year ago" --name-status --oneline 2> /dev/null || true)"
    printf "commits - %s\n" "$(echo "$COMMITS" | grep -vc '^M' | xargs echo)"
    printf "merges  - %s\n" "$(echo "$COMMITS" | grep -c '^M' | xargs echo)"
    cd "$GIT_DIR" || exit
done < <(
    cd "$GIT_DIR" && find . -name '.git' -type d
) > review.report

awk -F ' - ' '/commits/ {sum += $2} END {print "total commits: " sum}' review.report
awk -F ' - ' '/merges/ {sum += $2} END {print "total merges: " sum}' review.report
awk -F ' - ' '{sum += $2} END {print "total git contributions: " sum}' review.report