bash/bashrc.d/cd.bash


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# If given two arguments to cd, replace the first with the second in $PWD,
# emulating a Zsh function that I often find useful; preserves options too
cd() {
    local arg dir endopts
    local -a opts dirs
    for arg in "$@" ; do
        if [[ $arg == -- ]] ; then
            endopts=1
        elif [[ $arg == -* ]] && ! ((endopts)) ; then
            opts=("${opts[@]}" "$arg")
        else
            dirs=("${dirs[@]}" "$arg")
        fi
    done
    if ((${#dirs[@]} == 2)) ; then
        if [[ $PWD == *"${dirs[0]}"* ]] ; then
            builtin cd "${opts[@]}" -- "${PWD/${dirs[0]}/${dirs[1]}}"
        else
            printf '%s\n' 'bash: cd: could not replace substring' >&2
            return 1
        fi
    else
        builtin cd "${opts[@]}" -- "${dirs[@]}"
    fi
}