bash function to cd to work/<year>/ directory

bash-function-work-navigation.sh

# Navigate top-level work/year project organization directories
#
# Setup:
# Put or source function in .bashrc
# Also set WORK_ROOT to point to a container directory such as ~/work
# Make a directory under that for at least the current year, e.g. ~/work/2020
#
# Usage examples:
# $ work         # cd to the current year
# $ work --      # cd two years back. Or --- for three years, etc.
# $ work 2018    # cd to work/2018/
# $ work current # cd to work/current/ (special case)
# $ work l       # cd to work/local/   (special case)

function work () {

  arg=$1
  
  if [[ "$WORK_ROOT" == '' ]]; then
     echo must set WORK_ROOT
  else
    if [[ "$arg" != '' ]] && [[ "$arg" != *[^0-9]* ]]; then
      # argument is numeric; assume it's a year
      cd $WORK_ROOT/$arg;
    else
      year=`date +%Y`;
      if [[ "$arg" == 'local' || "$arg" == 'l' ]]; then
         year="local";
      elif [[ "$arg" == 'c' || "$arg" == 'cur' || "$arg" == 'current' ]]; then
        year="current";
      elif [[ `echo -n "$arg" | cut -c1` == '-' ]]; then
        # each dash in arg goes back a year. e.g. --- (length 3) puts us 3 years back
        year=`echo $(($year-$(echo -n $arg|wc -c)))`
      else
        echo "use 'cur' or 'c' for current projects"
      fi;
      cd $WORK_ROOT/$year;
    fi # non numeric arg
  fi # WORK_ROOT set
}