programs/fish/fasd: fasd integration for fish

Add simple fasd integration for fish.
A command `z` directly jumps to the most “frecent” folder fitting its
argument.

2 files changed, 31 insertions, 0 deletions

diff --git a/modules/module-list.nix b/modules/module-list.nix
index bdbb8e1e..3b6bff9c 100644
--- a/modules/module-list.nix
+++ b/modules/module-list.nix
@@ -6,6 +6,7 @@
   ./profiles/common.nix
   ./profiles/tests.nix
   ./programs/gnupg
+  ./programs/fish/fasd.nix
   ./services/multipath-vpn.nix
   ./services/postfix
   ./services/starbound.nix
diff --git a/modules/programs/fish/fasd.nix b/modules/programs/fish/fasd.nix
new file mode 100644
index 00000000..c3386568
--- /dev/null
+++ b/modules/programs/fish/fasd.nix
@@ -0,0 +1,30 @@
+{ pkgs, config, lib, ... }:
+
+with lib;
+
+let cfg = config.vuizvui.programs.fish.fasd;
+in
+
+{
+  options.vuizvui.programs.fish.fasd = {
+    enable = mkEnableOption "fasd integration in fish";
+  };
+
+  config = mkIf cfg.enable {
+
+    environment.systemPackages = [ pkgs.fasd ];
+
+    programs.fish = {
+      interactiveShellInit = let fasd = "${pkgs.fasd}/bin/fasd"; in ''
+        function -e fish_preexec _run_fasd
+          ${fasd} --proc (${fasd} --sanitize "$argv") > "/dev/null" 2>&1
+        end
+        function z --description "Jump to folder by usage frequency"
+          cd (fasd -d -e 'printf %s' "$argv")
+        end
+        set PATH (dirname ${fasd}) $PATH
+      '';
+    };
+
+  };
+}