Save "project" directories and navigate to them quickly

pm.zsh

function pm() {
    local pfile=$HOME/.projects
    if [[ ! -f $pfile ]]; then
      touch $pfile
    fi
    local usage="Usage: pm [-a|-d|-l|-h] [key] [path]"

    # List projects
    if [[ $1 == "-l" ]]; then
      echo -e "\e[4m\e[1mKey\e[0m\t\e[4m\e[1mPath\e[0m" 
      awk '{print " " $1 "\t" $2}' $pfile
    # Add project
    elif [[ $1 == "-a" && -d $3 && -n $2 ]]; then
        pkey=$2
        ppath=$3
        echo "$pkey $ppath" >> $pfile
    # Remove project
    elif [[ $1 == "-d" ]]; then
        # sed -i '/^'$2'\s/d' $pfile # GNU sed
        sed -i "" "/^$2 /d" $pfile # BSD (macOS) sed
    elif [[ $1 == "-h" ]]; then
        echo $usage
        echo "  -l: list projects"
        echo "  -a: add project"
        echo "  -d: delete project"
        echo "  -h: help"
        echo "Examples:"
        echo "  pm <key> - cd to project"
        echo "  pm -a <key> <path> - add project"
    elif [[ ${1:0:1} == '-' ]]; then
        echo "Invalid option: $1\n"
        echo $usage
    elif [[ -n $1 ]]; then
        # Jump to project
        ppath=$(awk '$1 == "'$1'" {print $2}' $pfile)
        if [[ -n $ppath ]]; then
            cd $ppath
        else
            echo "Project not found: $1"
        fi
    else
        echo $usage
    fi
}