git_commit_goal_calendar.sh

git_commit_goal_calendar.sh

#!/bin/bash

_goal=${_GIT_GOAL_COMMITS:-}
if [[ -n "${_goal}" ]]; then
    _goal=$_goal
else
    _goal=5
fi

git_commit_goal_calendar() {
  
  local GOAL="${_goal}"

  echo -e "Git Commit Goal Calendar\n"

  local months=()
  local today=$(date +%Y-%m-01)

  for ((offset=11; offset>=0; offset--)); do
    months+=("$(date -d "$today -$offset month" +%Y-%m)")
  done

  render_month() {
    local ym=$1
    local year=${ym%-*}
    local month=${ym#*-}
    #local days_in_month=$(cal "$((10#$month))" "$year" | awk 'NF {d = $NF}; END {print d}')
    local days_in_month=$(date -d "$year-$month-01 +1 month -1 day" +%d)

    local first_weekday=$(date -d "$year-$month-01" +%u) # 1=Mon
    local rows=()

    header="$(date -d "$ym-01" +%B) $year"
    headerlen=$(echo $header | wc -c)
    headeroffset=$(((21 - headerlen)))
    rows+=$(printf "${header} %${headeroffset}s")
    rows+=("Mo Tu We Th Fr Sa Su ")

    local line=""
    local day=1
    local started=0

    while (( ${#rows[@]} < 8 )); do
      line=""
      for dow in {1..7}; do
        if (( !started && dow < first_weekday )); then
          line+="   "
        elif (( day <= days_in_month )); then
          date_str=$(printf "$year-%02d-%02d" "$((10#$month))" "$((10#$day))")
          commit_count=$(git log --since="$date_str 00:00" --until="$date_str 23:59" --pretty=oneline --no-merges 2>/dev/null | wc -l)
          if [[ $commit_count -eq 0 ]]; then
            color="\033[90m"
          elif [[ $commit_count -lt $GOAL ]]; then
            color="\033[31m"
          elif [[ $commit_count -eq $GOAL ]]; then
            color="\033[33m"
          else
            color="\033[32m"
          fi

          if [[ "$date_str" == "$(date +%Y-%m-%d)" ]]; then
            color="\033[1;37m"
          fi

          line+=$(printf "$color%2d\033[0m " "$day")
          ((day++))
          started=1
        else
          line+="   "
        fi
      done
      rows+=("$line")
      line=""
    done
    
    for row in "${rows[@]}"; do
      echo "$row"
    done
    rows=()
  }

  for ((i=0; i<12; i+=3)); do
    mapfile -t M0 < <(render_month "${months[i]}")
    mapfile -t M1 < <(render_month "${months[i+1]}")
    mapfile -t M2 < <(render_month "${months[i+2]}")

    for ((r=0; r<8; r++)); do
      printf "%-10s %-10s %-25s\n" "${M0[r]}"  "${M1[r]}"  "${M2[r]}"
    done
    echo
  done

  echo -e "Legend:"
  echo -e " \033[90m■\033[0m  no commits   \033[31m■\033[0m  less than $GOAL   \033[33m■\033[0m  exactly $GOAL   \033[32m■\033[0m  more than $GOAL"
}

git_commit_goal_calendar