Add fish configuration

Signed-off-by: George Kaklamanos <gkaklas@gkaklas.gr>

home-manager/config.nix

@@ -1,3 +1,3 @@
 {pkgs, ...}: {
-  imports = [./starship.nix];
+  imports = [./fish.nix ./starship.nix];
 }

home-manager/fish.nix

@@ -0,0 +1,54 @@
+{pkgs, ...}: {
+  programs.fish = {
+    enable = true;
+
+    interactiveShellInit = ''
+      set fish_greeting
+    '';
+
+    plugins = [
+      {
+        name = "done";
+        src = pkgs.fishPlugins.done.src;
+      }
+      {
+        name = "fzf-fish";
+        src = pkgs.fishPlugins.fzf-fish.src;
+      }
+    ];
+
+    shellAliases = {
+      # My defaults
+      "ls" = "exa";
+      "dig" = "dig +noall +answer";
+      "ffmpeg" = "ffmpeg -hide_banner -loglevel error -stats -threads 10";
+      "rsync" = "rsync --info=progress2 --progress -rpgo --partial --inplace";
+
+      # Nix
+      "nrs" = "sudo nixos-rebuild switch --flake ~gkaklas/nix/nixos/";
+      "upn" = "sudo nix flake update ~gkaklas/nix/nixos/";
+      "hms" = "home-manager switch --flake ~/nix/home-manager/";
+      "uph" = "nix flake update ~/nix/home-manager/ ";
+
+      # git
+      "gc" = "git commit --verbose --gpg-sign --signoff";
+      "gc!" = "git commit --verbose --gpg-sign --signoff --amend";
+      "gst" = "git status";
+      "gdca" = "git diff --cached";
+      "gapa" = "git add --patched";
+      "glola" = "git log --graph --pretty=\"%G?-%C(magenta)%h %C(yellow)(%al)%C(cyan): %s\" --color=always";
+    };
+
+    shellAbbrs = {
+      "-h" = {
+        position = "anywhere";
+        expansion = "--help";
+      };
+      "L" = {
+        position = "anywhere";
+        setCursor = true;
+        expansion = "% | less";
+      };
+    };
+  };
+}