lf: add module

Adds 'programs.lf', configuration managment for lf, a terminal file
manager.

PR #1174

tests/modules/programs/lf/all-options.nix

@@ -0,0 +1,86 @@
+{ config, lib, pkgs, ... }:
+
+with lib;
+
+let
+  pvScript = builtins.toFile "pv.sh" "cat $1";
+  expected = builtins.toFile "settings-expected" ''
+    set icons
+    set noignorecase
+    set ratios "2:2:3"
+    set tabstop 4
+
+    cmd added :echo "foo"
+    cmd multiline :{{
+      push gg
+      echo "bar"
+      push i
+    }}
+    cmd removed
+
+    map aa should-be-added
+    map ab
+
+    cmap <c-a> should-be-added
+    cmap <c-b>
+
+    set previewer ${pvScript}
+    map i ${"$"}${pvScript} "$f" | less -R
+
+
+
+    # More config...
+
+  '';
+in {
+  config = {
+    programs.lf = {
+      enable = true;
+
+      cmdKeybindings = {
+        "<c-a>" = "should-be-added";
+        "<c-b>" = null;
+      };
+
+      commands = {
+        added = '':echo "foo"'';
+        removed = null;
+        multiline = ''
+          :{{
+            push gg
+            echo "bar"
+            push i
+          }}'';
+      };
+
+      extraConfig = ''
+        # More config...
+      '';
+
+      keybindings = {
+        aa = "should-be-added";
+        ab = null;
+      };
+
+      previewer = {
+        keybinding = "i";
+        source = pvScript;
+      };
+
+      settings = {
+        ignorecase = false;
+        icons = true;
+        tabstop = 4;
+        ratios = "2:2:3";
+      };
+    };
+
+    nixpkgs.overlays =
+      [ (self: super: { lf = pkgs.writeScriptBin "dummy-lf" ""; }) ];
+
+    nmt.script = ''
+      assertFileExists home-files/.config/lf/lfrc
+      assertFileContent home-files/.config/lf/lfrc ${expected}
+    '';
+  };
+}

tests/modules/programs/lf/default.nix

@@ -0,0 +1,5 @@
+{
+  lf-all-options = ./all-options.nix;
+  lf-minimal-options = ./minimal-options.nix;
+  lf-no-pv-keybind = ./no-pv-keybind.nix;
+}

tests/modules/programs/lf/minimal-options.nix

@@ -0,0 +1,18 @@
+{ config, lib, pkgs, ... }:
+
+with lib;
+
+let expected = builtins.toFile "settings-expected" "\n\n\n\n\n\n\n\n\n\n\n";
+in {
+  config = {
+    programs.lf = { enable = true; };
+
+    nixpkgs.overlays =
+      [ (self: super: { lf = pkgs.writeScriptBin "dummy-lf" ""; }) ];
+
+    nmt.script = ''
+      assertFileExists home-files/.config/lf/lfrc
+      assertFileContent home-files/.config/lf/lfrc ${expected}
+    '';
+  };
+}

tests/modules/programs/lf/no-pv-keybind.nix

@@ -0,0 +1,43 @@
+{ config, lib, pkgs, ... }:
+
+with lib;
+
+let
+  pvScript = builtins.toFile "pv.sh" "cat $1";
+  expected = builtins.toFile "settings-expected" ''
+
+
+
+
+
+
+
+
+    set previewer ${pvScript}
+
+
+
+    # More config...
+
+  '';
+in {
+  config = {
+    programs.lf = {
+      enable = true;
+
+      extraConfig = ''
+        # More config...
+      '';
+
+      previewer = { source = pvScript; };
+    };
+
+    nixpkgs.overlays =
+      [ (self: super: { lf = pkgs.writeScriptBin "dummy-lf" ""; }) ];
+
+    nmt.script = ''
+      assertFileExists home-files/.config/lf/lfrc
+      assertFileContent home-files/.config/lf/lfrc ${expected}
+    '';
+  };
+}