dotfiles/.zshrc

_here="$(dirname -- "$(readlink -f -- "${HOME}/.zshrc")")"

###########
# Options #
###########
# Ref: https://zsh.sourceforge.io/Doc/Release/Options.html

setopt CORRECT
setopt NONOMATCH
setopt INTERACTIVECOMMENTS

###################
# Shell Variables #
###################
# Ref: https://zsh.sourceforge.io/Doc/Release/Parameters.html

path=("${HOME}/.local/bin" "${path[@]}")
fpath=("${_here}/.zsh_functions" "${fpath[@]}")
export PATH
export MAIL="/var/spool/mail/$USER"
export MAILCHECK=60

###################
# Other Variables #
###################

export VISUAL="nvim"
export EDITOR="nvim"
export DIFFPROG="nvim -d"
export NNN_TRASH=2
export NNN_PLUG=''

##################
# History search #
##################

autoload -U history-search-end
zle -N history-beginning-search-backward-end history-search-end
zle -N history-beginning-search-forward-end history-search-end

# Fix for buggy behaviour of history search
# See https://github.com/zsh-users/zsh-autosuggestions/issues/619#issuecomment-904193190
ZSH_AUTOSUGGEST_CLEAR_WIDGETS+=(history-beginning-search-backward-end history-beginning-search-forward-end)

zstyle ':autocomplete:tab:*' completion select

############
# Keybinds #
############

if ! infocmp "$TERM" >/dev/null; then
    echo "TERM $TERM not supported on your system!" >&2
    echo "Some keybindings might not work properly." >&2
fi

if [[ -n $terminfo ]]; then
    # create a zkbd compatible hash;
    # to add other keys to this hash, see: man terminfo 5
    typeset -g -A key

    key[Home]=${terminfo[khome]}
    key[End]=${terminfo[kend]}
    key[Insert]=${terminfo[kich1]}
    key[Delete]=${terminfo[kdch1]}
    key[Up]=${terminfo[kcuu1]}
    key[Down]=${terminfo[kcud1]}
    key[Left]=${terminfo[kcub1]}
    key[Right]=${terminfo[kcuf1]}
    key[PageUp]=${terminfo[kpp]}
    key[PageDown]=${terminfo[knp]}
    key[CtrlLeft]=${terminfo[kLFT5]}
    key[CtrlRight]=${terminfo[kRIT5]}

    # Function mapping
    [[ -n "${key[Home]}"       ]]  && bindkey  "${key[Home]}"      beginning-of-line
    [[ -n "${key[End]}"        ]]  && bindkey  "${key[End]}"       end-of-line
    [[ -n "${key[Insert]}"     ]]  && bindkey  "${key[Insert]}"    overwrite-mode
    [[ -n "${key[Delete]}"     ]]  && bindkey  "${key[Delete]}"    delete-char
    [[ -n "${key[Up]}"         ]]  && bindkey  "${key[Up]}"        history-beginning-search-backward-end
    [[ -n "${key[Down]}"       ]]  && bindkey  "${key[Down]}"      history-beginning-search-forward-end
    [[ -n "${key[Left]}"       ]]  && bindkey  "${key[Left]}"      backward-char
    [[ -n "${key[Right]}"      ]]  && bindkey  "${key[Right]}"     forward-char
    [[ -n "${key[PageUp]}"     ]]  && bindkey  "${key[PageUp]}"    beginning-of-history
    [[ -n "${key[PageDown]}"   ]]  && bindkey  "${key[PageDown]}"  end-of-history
    [[ -n "${key[CtrlLeft]}"   ]]  && bindkey  "${key[CtrlLeft]}"  backward-word
    [[ -n "${key[CtrlRight]}"   ]]  && bindkey  "${key[CtrlRight]}"  forward-word

    bindkey "^R" history-incremental-search-backward

    # Finally, make sure the terminal is in application mode, when zle is
    # active. Only then are the values from $terminfo valid.
    if (( ${+terminfo[smkx]} && ${+terminfo[rmkx]} )); then
            autoload -Uz add-zle-hook-widget
            function zle_application_mode_start { echoti smkx; }
            function zle_application_mode_stop { echoti rmkx; }
            add-zle-hook-widget -Uz zle-line-init zle_application_mode_start
            add-zle-hook-widget -Uz zle-line-finish zle_application_mode_stop
    fi
fi

###########
# Plugins #
###########

if [[ ! -d "${_here}/.cache" ]]; then
    mkdir "${_here}/.cache"
fi

_antidote="${_here}/.cache/.antidote"
_plugins="${_here}/.zsh_plugins.txt"
_plugins_cache="${_here}/.cache/.zsh_plugins.zsh"

if [[ ! -d "$_antidote" ]]; then
    git clone --depth=1 https://github.com/mattmc3/antidote.git "$_antidote"
fi

if [[ ! -f "${_plugins}" ]]; then
    touch "${_plugins}"
fi

fpath=("${_antidote}/functions" "${fpath[@]}")
autoload -Uz antidote

if [[ ! "${_plugins_cache}" -nt "${_plugins}" ]]; then
    antidote bundle <"${_plugins}" >"${_plugins_cache}"
fi

# shellcheck source=.cache/.zsh_plugins.zsh
source "${_plugins_cache}"

#############
# Functions #
#############
# Ref: https://zsh.sourceforge.io/Doc/Release/Functions.html#Functions

function set_terminal_title() {
    local title
    if [ -z "$1" ]; then
        title=$(basename "$(print -P "%~")")
    else
        title="$1"
    fi
    echo -ne "\033]2;$title\033\\"
}

function precmd() {
    set_terminal_title
}
# function preexec() { set_terminal_title "$1" }

function ssh_with_title() {
    local host=""
    local skip_next="false"
    
    for arg in "$@"; do
        case "$arg" in
            -[bcDeFIiLlmOopRSWw]?*)
                # Option with argument immediately after, like -p22
                skip_next="false"
                ;;
            -[bcDeFIiLlmOopRSWw])
                # Option with argument on next iteration
                skip_next="true"
                ;;
            -*)
                # Any other option, assumed not to take an argument
                skip_next="false"
                ;;
            *)
                if [ "$skip_next" = "true" ]; then
                    skip_next="false"
                else
                    host="${arg#*@}"
                fi
                ;;
        esac
    done

    set_terminal_title "$host"
    ssh "$@"
    set_terminal_title
}

###########
# Aliases #
###########

alias ln='ln -fi'
alias rm='rm -I'
alias n='nnn -dHerU'
alias ssh='ssh_with_title'

##########
# Prompt #
##########

autoload -Uz promptinit
promptinit
prompt warg