zsh: added shell configurations

nix/modules/shell.nix

@@ -0,0 +1,50 @@
+{ config, lib, pkgs }:
+
+{
+  programs.zsh.enable = true;
+
+  environment.systemPackages = with pkgs; [
+    git
+    tmux
+    tlrc
+    file
+    stow
+    btop
+    jq
+    fzf
+    killall
+    ripgrep
+    wget
+
+    ffmpeg
+    imagemagick
+  ];
+
+  programs.direnv = {
+    enable = true;
+    silent = true;
+    loadInNixShell = true;
+    nix-direnv.enable = true;
+
+    direnvrcExtra = ''
+      export PROMPT="* $PROMPT"
+    '';
+  };
+
+  programs.neovim = {
+    enable = true;
+    vimAlias = true;
+    viAlias = true;
+    withRuby = true;
+    withPython3 = true;
+    withNodeJs = true;
+  };
+
+  neovim = pkgs.neovim.override {
+    nativeBuildInputs = with pkgs; [
+      cargo
+      nodejs
+      go
+    ];
+  };
+}

stow/.zshrc

@@ -0,0 +1,59 @@
+# z shell configuration
+
+PROMPT="%F{green}%~ %F{yellow}%m %f"
+
+bindkey -e
+
+# hist
+HISTFILE="$HOME/.local/share/zsh_hist"
+SAVEHIST=10000000
+HISTSIZE=10000000
+
+setopt hist_save_no_dups
+setopt hist_ignore_all_dups
+setopt hist_find_no_dups
+setopt hist_ignore_space
+
+# shell alias
+alias ls="ls -h --color=auto"
+alias la="ls -ah --color=auto"
+alias ll="ls -ahl --color=auto"
+
+# env vars
+export GOPATH="$HOME/.local/share/go"
+export PATH="$PATH:$GOPATH/bin"
+
+export EDITOR="nvim"
+
+# functions
+func calc() {
+  # why isn't this in bash by default
+  #
+  if command -v python3 > /dev/null; then
+    python3 -c "print($1)"
+  else
+    echo "python3 needs to be installed for this to work!"
+  fi
+}
+
+# plugins
+plugindir="$HOME/.local/share/zsh_plug"
+func plugInstall() {
+  # clones a repo and then sources it.
+  # first arg is git url, second is source
+  # location
+  
+  foldername=$(basename $1)
+  clonepath="$plugindir/$foldername"
+  sourcefile="$clonepath/$2"
+
+  if command -v git > /dev/null && [ ! -d "$clonepath" ]; then
+    git clone $1 "$clonepath"
+  fi
+
+  if [ -f "$sourcefile" ]; then
+    source "$sourcefile"
+  fi
+}
+
+plugInstall https://github.com/zsh-users/zsh-syntax-highlighting zsh-syntax-highlighting.zsh