zsh: big rehaul and switch to liquid prompt

.zshrc

@@ -1,16 +1,81 @@
-# Lines configured by zsh-newuser-install
-HISTFILE=~/.histfile
-HISTSIZE=1000
-SAVEHIST=1000
-setopt appendhistory
-bindkey -e
-# End of lines configured by zsh-newuser-install
-# The following lines were added by compinstall
-zstyle :compinstall filename '/home/gshipunov/.zshrc'
+setopt autocd              # change directory just by typing its name
+#setopt correct            # auto correct mistakes
+setopt interactivecomments # allow comments in interactive mode
+setopt magicequalsubst     # enable filename expansion for arguments of the form ‘anything=expression’
+setopt nonomatch           # hide error message if there is no match for the pattern
+setopt notify              # report the status of background jobs immediately
+setopt numericglobsort     # sort filenames numerically when it makes sense
+setopt promptsubst         # enable command substitution in prompt
 
+WORDCHARS=${WORDCHARS//\/} # Don't consider certain characters part of the word
+
+# hide EOL sign ('%')
+PROMPT_EOL_MARK=""
+
+# configure key keybindings
+bindkey -e                                        # emacs key bindings
+
+# enable completion features
 autoload -Uz compinit
-compinit
-# End of lines added by compinstall
+compinit -d ~/.cache/zcompdump
+zstyle ':completion:*:*:*:*:*' menu select
+zstyle ':completion:*' matcher-list 'm:{a-zA-Z}={A-Za-z}' # case insensitive tab completion
+
+# History configurations
+HISTFILE=~/.zsh_history
+HISTSIZE=1000
+SAVEHIST=2000
+setopt hist_expire_dups_first # delete duplicates first when HISTFILE size exceeds HISTSIZE
+setopt hist_ignore_dups       # ignore duplicated commands history list
+setopt hist_ignore_space      # ignore commands that start with space
+setopt hist_verify            # show command with history expansion to user before running it
+#setopt share_history         # share command history data
+
+# force zsh to show the complete history
+alias history="history 0"
+
+# make less more friendly for non-text input files, see lesspipe(1)
+#[ -x /usr/bin/lesspipe ] && eval "$(SHELL=/bin/sh lesspipe)"
+
+# Prompt
+[[ $- = *i* ]] && source $HOME/.liquidprompt
+
+# enable color support of ls, less and man, and also add handy aliases
+if [ -x /usr/bin/dircolors ]; then
+    test -r ~/.dircolors && eval "$(dircolors -b ~/.dircolors)" || eval "$(dircolors -b)"
+    alias ls='ls --color=auto'
+    #alias dir='dir --color=auto'
+    #alias vdir='vdir --color=auto'
+
+    alias grep='grep --color=auto'
+    alias fgrep='fgrep --color=auto'
+    alias egrep='egrep --color=auto'
+    alias diff='diff --color=auto'
+    alias ip='ip --color=auto'
+
+    export LESS_TERMCAP_mb=$'\E[1;31m'     # begin blink
+    export LESS_TERMCAP_md=$'\E[1;36m'     # begin bold
+    export LESS_TERMCAP_me=$'\E[0m'        # reset bold/blink
+    export LESS_TERMCAP_so=$'\E[01;33m'    # begin reverse video
+    export LESS_TERMCAP_se=$'\E[0m'        # reset reverse video
+    export LESS_TERMCAP_us=$'\E[1;32m'     # begin underline
+    export LESS_TERMCAP_ue=$'\E[0m'        # reset underline
+
+    # Take advantage of $LS_COLORS for completion as well
+    zstyle ':completion:*' list-colors "${(s.:.)LS_COLORS}"
+fi
+
+# enable auto-suggestions based on the history
+if [ -f /usr/share/zsh-autosuggestions/zsh-autosuggestions.zsh ]; then
+    . /usr/share/zsh-autosuggestions/zsh-autosuggestions.zsh
+    # change suggestion color
+    ZSH_AUTOSUGGEST_HIGHLIGHT_STYLE='fg=#999'
+fi
+
+# enable syntax highlighting
+if [ -f /usr/share/zsh-syntax-highlighting/zsh-syntax-highlighting.zsh ]; then
+    . /usr/share/zsh-syntax-highlighting/zsh-syntax-highlighting.zsh
+fi
 
 # pager
 export PAGER="less --quit-if-one-screen"
@@ -20,13 +85,6 @@ autoload -z edit-command-line
 zle -N edit-command-line
 bindkey "^X^E" edit-command-line
 
-# Prompt
-if [[ -n $SSH_CONNECTION ]]; then
-    HOST_LBL="%F{red}[%m]%f"
-fi
-
-PROMPT="%B%(?..%F{red}[%?]%f)$HOST_LBL%(!.%F{red}[%n]%f.)%F{cyan}%~%(!.%F{red}.%F{green})%# %f%b"
-
 #### Aliases
 # add some color
 alias grep="grep --color"
@@ -58,10 +116,11 @@ case "$unamestr" in
     alias pst="wl-paste"
     alias xcpy="xclip -selection clipboard"
     alias xpst="xclip -selection clipboard -o"
-
-    # use dircolors, if we have them
-    if [[ -f $HOME/.dir_colors ]]; then
-        eval $(dircolors -b $HOME/.dir_colors)
-    fi
     ;;
 esac
+
+# hook in direnv, if it installed
+if ! type "direnv" > /dev/null; then
+    eval "$(direnv hook zsh)"
+fi
+if [ -e /home/gshipunov/.nix-profile/etc/profile.d/nix.sh ]; then . /home/gshipunov/.nix-profile/etc/profile.d/nix.sh; fi # added by Nix installer