feat(zsh): add persistence and configure behaviour

Zsh history is pretty useful.

home/zsh/home.nix

@@ -0,0 +1,83 @@
+{ config
+, ... }: {
+  programs.zsh = {
+    enable = true;
+    autocd = false;
+    defaultKeymap = "emacs";
+    localVariables.PROMPT = let
+      op = {
+        res = "%{$reset_color%}";
+        col = color: "%{$fg[${color}]%}";
+      };
+      c = color: text: "${op.col color}${text}${op.res}";
+    in "${c "green" "%n"}${c "cyan" "@"}${c "yellow" "%m"} ${c "magenta" "<3"} %~ ${c "blue" "$PARTICLE"}${c "red" "%#"} ";
+    sessionVariables.LIBVIRT_DEFAULT_URI = "qemu:///system";
+
+    history = {
+      extended = true;
+      path = "${config.home.homeDirectory}/.local/state/zsh/history";
+      ignorePatterns = [
+        "rm *" "reboot"
+        "kill *" "killall *" "pkill *"
+      ];
+    };
+
+    enableCompletion = true;
+    initExtraBeforeCompInit = ''
+      zstyle ':completion:*' auto-description '%d'
+      zstyle ':completion:*' completer _expand _complete _ignored _approximate
+      zstyle ':completion:*' format '%S%d%s'
+      zstyle ':completion:*' group-name ""
+      zstyle ':completion:*' glob 1
+      zstyle ':completion:*' list-colors ""
+      zstyle ':completion:*' list-prompt %S%p TAB to scroll, any other key to continue typing%s
+      zstyle ':completion:*' matcher-list 'm:{[:lower:][:upper:]}={[:upper:][:lower:]}' 'l:|=* r:|=*' 'r:|[._-]=** r:|=**'
+      zstyle ':completion:*' max-errors 5
+      zstyle ':completion:*' menu select=0
+      zstyle ':completion:*' prompt '%e errors'
+      zstyle ':completion:*' select-prompt %SScrolling active: current selection at %p%s
+      zstyle ':completion:*' substitute 1
+    '';
+
+    initExtraFirst = ''
+      # enable colors for prompt
+      autoload -U colors && colors
+
+      # shell context indicator
+      PARTICLE=""
+      if [[ -v IN_NIX_SHELL ]]; then
+        PARTICLE="$IN_NIX_SHELL "
+      elif [[ $SHLVL != 1 ]]; then
+        PARTICLE="nested "
+      fi
+    '';
+    initExtra = ''
+      # set misc zsh options
+      setopt HIST_FIND_NO_DUPS
+      unsetopt extendedglob
+      unsetopt beep
+      unsetopt notify
+      unsetopt nomatch
+
+      # set terminal title
+      function precmd {
+        echo -ne "\e]0;$USER@$HOST <3 ''${PWD/#"$HOME"/~} $PARTICLE\a"
+      }
+
+      # set up history search
+      autoload -U history-search-end
+      zle -N history-beginning-search-forward-end history-search-end
+      bindkey '^[[B' history-beginning-search-forward-end
+      bindkey '^[OB' history-beginning-search-forward-end
+      zle -N history-beginning-search-backward-end history-search-end
+      bindkey '^[[A' history-beginning-search-backward-end
+      bindkey '^[OA' history-beginning-search-backward-end
+    '';
+
+    shellAliases = {
+      gs = "git status";
+      ls = "ls --color=auto";
+      nix-shell = "nix-shell --run zsh";
+    };
+  };
+}

home/zsh/nixos.nix

@@ -0,0 +1,3 @@
+{
+  users.home.persist.directories = [ { directory = ".local/state/zsh"; mode = "0700"; } ];
+}