A small ZSH script to replace autojump

directory_jumper.zsh

# Usage: `jd `
# Make after typing j, d, and a space, fzy will pop up offering a fuzzy selector.

# Setup some data a data file to store visited directories
mkdir -p "$XDG_DATA_HOME/zshrc"
JD_DATA_DIR="$XDG_DATA_HOME/zshrc/chpwd.txt"
touch $JD_DATA_DIR
local tmp=$(mktemp)
cat $JD_DATA_DIR | while read dir ; do [[ -d $dir ]] && echo $dir ; done > $tmp
cat $tmp > $JD_DATA_DIR
# Track visited directories
chpwd_functions+=(on_chpwd)
function on_chpwd {
    local tmp=$(mktemp)
    { echo $PWD ; cat $JD_DATA_DIR } | sort | uniq 1> $tmp
    cat $tmp > $JD_DATA_DIR
}
# zle widget function
function fzy_jd {
    # check if `jd ` was triggered in the middle of another command
    # e.g. $ aaaaaaajd 
    # If so, we manually input the `jd `
    if [[ ! -z $BUFFER ]]; then
        # Append `jd ` to the prompt
        BUFFER=$BUFFER"jd "
        # move the cursor to the end of the line
        zle end-of-line
        return 0
    fi
    # ask the user to select a directory to jump to
    local dir=$({ echo $HOME ; cat $JD_DATA_DIR } | fzy)
    if [[ -z $dir ]]; then
        # no directory was selected, reset the prompt to what it was before
        zle reset-prompt
        return 0
    fi
    # Setup the command to change the directory
    BUFFER="cd $dir"
    # Accepts the cd we setup above
    zle accept-line
    local ret=$?
    # force the prompt to redraw to mimic what would occur with a normal cd
    zle reset-prompt
    return $ret
}
# define the new widget function
zle -N fzy_jd
# bind the widget function to `jd `
bindkey 'jd ' fzy_jd
# a nicety so that executing just jd will mimic the behaviour of just executing
# cd, that is, change the pwd to $HOME
alias jd=cd