Use google's verbatim search and date range restriction simultaneously

gsdv.sh

#!/usr/bin/env bash
#
# Use google's date range and "verbatim" simultaneously
# Paul Phillips <psp@brb.fyi>
#

NAME="$(basename "$0")"
read -r -d '' USAGE << EOM
usage: $NAME [-s days] [-e days] [search terms]

Performs verbatim google search with date range.
Warning: after you use this a couple times in a short
period, google will decide you are a robot and assault
you with captchas.

Examples:
  $NAME -s 14 "jordan peterson"  # Searches most recent 14 day range
  $NAME -s 60 -e 30 suffuse talk # Searches between 60 and 30 days ago
  $NAME scala unsound            # Searches 0-30 days ago (default)
EOM

case "$1" in
  "") echo >&2 "$USAGE" && exit 1 ;;
  -h) echo >&2 "$USAGE" && exit 0 ;;
esac

# Convert a year month and day into a julian day.
# https://en.wikipedia.org/wiki/Julian_day
julian_day() {
  local YYYY MM DD;
  read -r YYYY MM DD < <( date "+%Y %m %d" )

  local MM1=$(( 12 * YYYY + 10#$MM - 3 ))
  local YY1=$(( MM1 / 12 ))
  local MM2=$(( 734 * MM1 + 15 ))
  local RES=$(( MM2/24 - YY1*2 + YY1/4 - YY1/100 + YY1/400 + 10#$DD + 1721119 ))

  printf "%s\n" "$RES"
}

verbatim_search_url () {
  local today="$(julian-day)"
  local start="$(( today - 30 ))"
  local end="$today"

  while getopts :s:e: opt; do
    case $opt in
      s) start=$(( today - $OPTARG )) ;;
      e) end=$(( today - $OPTARG )) ;;
    esac
  done

  shift $(( OPTIND-1 ))

  local params="nfpr=1&tbs=li:1" # this part means 'verbatim'
  local query="$(xs of "$@" "daterange:$start-$end" | xs join:'+')"
  echo "https://www.google.com/search?q=$query&$params"
}

open "$(verbatim_search_url "$@")"