merge fish and neovim from wsl branch

nixos/fish.nix

@@ -0,0 +1,73 @@
+{ config, pkgs, ... }:
+
+{
+  programs.fish = {
+    enable = true;
+    shellAliases = {
+      theme = "bash ~/dotfiles/bashscripts/wsl_theme.sh";
+    };
+    interactiveShellInit = ''
+      fish_vi_key_bindings
+      set fish_greeting 🐟: (set_color yellow; date +%T; set_color green; date --iso-8601; set_color normal)
+
+      # name: Default
+      # author: Lily Ballard
+      # edits: DannyDannyDanny
+      # ref: stackoverflow.com/a/61262358/5684214
+      
+      function fish_prompt --description 'Write out the prompt'
+        set -l last_pipestatus $pipestatus
+        set -lx __fish_last_status $status # Export for __fish_print_pipestatus.
+        set -l normal (set_color normal)
+        set -q fish_color_status
+        or set -g fish_color_status red
+      
+        # Color the prompt differently when we're root
+        set -l color_cwd $fish_color_cwd
+        set -l suffix '>'
+        if functions -q fish_is_root_user; and fish_is_root_user
+            if set -q fish_color_cwd_root
+                set color_cwd $fish_color_cwd_root
+            end
+            set suffix '#'
+        end
+    
+        # Write pipestatus
+        # If the status was carried over (if no command is issued or if `set` leaves the status untouched), don't bold it.
+        set -l bold_flag --bold
+        set -q __fish_prompt_status_generation; or set -g __fish_prompt_status_generation $status_generation
+        if test $__fish_prompt_status_generation = $status_generation
+            set bold_flag
+        end
+        set __fish_prompt_status_generation $status_generation
+        set -l status_color (set_color $fish_color_status)
+        set -l statusb_color (set_color $bold_flag $fish_color_status)
+        set -l prompt_status (__fish_print_pipestatus "[" "]" "|" "$status_color" "$statusb_color" $last_pipestatus)
+        set -l nix_shell_info (
+          if test -n "$IN_NIX_SHELL"
+            echo -n "🐚 "
+          end
+        )
+      
+        echo -n -s (prompt_login)' ' (set_color $color_cwd) (prompt_pwd) $normal (fish_vcs_prompt) $normal " "$prompt_status $nix_shell_info $suffix " "
+      end
+   
+    '';
+  };
+
+  programs.bash = {
+    interactiveShellInit = ''
+      # the first arguement in the if statement check that the parent process is not a fish shell.
+      # this allows spawning a bash shell inside a fish shell without the inner-most bash shell launching a fish shell
+      # however this also means that nix-shell starts a bash shell unless you use `nix-shell [args] --run fish`
+      # or run `fish` as the first command when entering nix-shell
+
+      if [[ $(${pkgs.procps}/bin/ps --no-header --pid=$PPID --format=comm) != "fish" && -z ''${BASH_EXECUTION_STRING} ]]
+      then
+        shopt -q login_shell && LOGIN_OPTION='--login' || LOGIN_OPTION=""
+        exec ${pkgs.fish}/bin/fish $LOGIN_OPTION
+      fi
+    '';
+  };
+}
+

nixos/neovim.nix

@@ -0,0 +1,86 @@
+{ config, pkgs, ... }:
+
+{
+  programs.neovim = {
+    enable = true;
+    defaultEditor = true;
+    # package = pkgs.neovim;
+    configure = {
+      customRC = ''
+        set title
+        set go=a
+        set mouse=a
+        set nohlsearch
+        let mapleader=","
+
+        lua << EOF
+          local config_file = os.getenv("HOME")..'/.local/share/nvim_color_scheme'
+          local f=io.open(config_file, "r")
+          if f~=nil then 
+              local system_theme = f:read()
+              -- f:close()
+              io.close(f)
+              if system_theme == 'dark' then
+                  vim.cmd("set bg=dark")
+              elseif system_theme == 'light' then
+                  vim.cmd("set bg=light")
+              else
+                  print('warning: expected value "light" or "dark"')
+                  print('  got:', system_theme)
+                  print('  expected path:', file)
+              end
+          else 
+              print('warning: nvim color scheme not found')
+              print('  expected path:', file)
+          end
+        EOF
+
+        colorscheme gruvbox
+
+        " relative line numbering when leaving insert mode
+        set relativenumber
+        autocmd InsertEnter * :set number norelativenumber
+        autocmd InsertLeave * :set nonumber relativenumber
+
+        " netrw (dir listing) settings
+        let g:netrw_liststyle = 3
+        let g:netrw_banner = 0
+        let g:netrw_browse_split = 3
+        let g:netrw_winsize = 25  " % of page
+
+        set listchars=tab:→\ ,space:·,nbsp:␣,trail:•,eol:¶,precedes:«,extends:»
+        set clipboard+=unnamedplus
+
+        " Replace-all is aliased to S.
+        nnoremap S :%s//g<Left><Left>
+
+        " save file with ,w
+        map <leader>w :w<cr><Space>
+
+        " spellcheck
+        set spell spelllang=en_us
+        setlocal spell! spelllang=en_us
+      '';
+      # vimPlugins inspired from Alexnortung
+      # https://discourse.nixos.org/t/neovim-no-longer-uses-config-or-plugins/13399/4
+      packages.nix = with pkgs.vimPlugins; {
+        start = [
+          vim-surround  # shortcuts for setting () {} etc.
+          vim-gitgutter # git diff in sign column
+          # vim-airline   # nice and light status bar # doesn't work nicely with tmux
+          # coc-nvim coc-git coc-highlight coc-python coc-rls coc-vetur coc-vimtex coc-yaml coc-html coc-json # auto completion
+          vim-nix       # nix highlight
+          vimtex        # latex stuff
+          fzf-vim       # fuzzy finder through vim
+          nerdtree      # file structure inside nvim
+          rainbow       # color parenthesis
+          gruvbox-nvim  # theme
+          goyo-vim      # write prose
+          limelight-vim # prose paragraph highlighter
+        ];
+        opt = [];
+      };
+    };
+  };
+}
+