WIP: add jujutsu (w/ Delta)

I want to be able to re-use it between different source control systems
(e.g: `jj`).

As a first step, extract it to a proper module so that I can have it
live in a single space.

hosts/homes/ambroisie@mousqueton/default.nix

@@ -15,6 +15,9 @@
       # I use scripts that use the passthrough sequence often on this host
       enablePassthrough = true;
 
+      # Frequent reboots mean that session persistence can be handy
+      enableResurrect = true;
+
       terminalFeatures = {
         # HTerm uses `xterm-256color` as its `$TERM`, so use that here
         xterm-256color = { };

modules/home/default.nix

@@ -8,6 +8,7 @@
     ./bluetooth
     ./calibre
     ./comma
+    ./delta
     ./dircolors
     ./direnv
     ./discord
@@ -23,6 +24,7 @@
     ./gtk
     ./htop
     ./jq
+    ./jujutsu
     ./keyboard
     ./mail
     ./mpv

modules/home/delta/default.nix

@@ -0,0 +1,85 @@
+{ config, pkgs, lib, ... }:
+let
+  cfg = config.my.home.delta;
+in
+{
+  options.my.home.delta = with lib; {
+    enable = my.mkDisableOption "delta configuration";
+
+    package = mkPackageOption pkgs "delta" { };
+
+    git = {
+      enable = my.mkDisableOption "git integration";
+    };
+
+    jujutsu = {
+      enable = my.mkDisableOption "git integration";
+    };
+  };
+
+  config = lib.mkIf cfg.enable {
+    assertions = [
+      {
+        # For its configuration
+        assertion = cfg.jujutsu.enable -> cfg.git.enable;
+        message = ''
+          `config.my.home.delta.jujutsu` relies on `config.my.home.delta.git`
+          being enabled.
+        '';
+      }
+    ];
+
+    home.packages = [ cfg.package ];
+
+    programs.git = lib.mkIf cfg.git.enable {
+      delta = {
+        enable = true;
+        inherit (cfg) package;
+
+        options = {
+          features = "diff-highlight decorations";
+
+          # Less jarring style for `diff-highlight` emulation
+          diff-highlight = {
+            minus-style = "red";
+            minus-non-emph-style = "red";
+            minus-emph-style = "bold red 52";
+
+            plus-style = "green";
+            plus-non-emph-style = "green";
+            plus-emph-style = "bold green 22";
+
+            whitespace-error-style = "reverse red";
+          };
+
+          # Personal preference for easier reading
+          decorations = {
+            commit-style = "raw"; # Do not recolor meta information
+            keep-plus-minus-markers = true;
+            paging = "always";
+          };
+        };
+      };
+    };
+
+    programs.jujutsu = lib.mkIf cfg.jujutsu.enable {
+      settings = {
+        merge-tools = {
+          delta = {
+            # Errors are signaled with exit codes greater or equal to 2
+            diff-expected-exit-codes = [ 0 1 ];
+          };
+        };
+
+        ui = {
+          diff = {
+            # Delta expects a `git diff` input
+            format = "git";
+          };
+
+          pager = "delta";
+        };
+      };
+    };
+  };
+}

modules/home/git/default.nix

@@ -42,34 +42,6 @@ in
 
     lfs.enable = true;
 
-    delta = {
-      enable = true;
-
-      options = {
-        features = "diff-highlight decorations";
-
-        # Less jarring style for `diff-highlight` emulation
-        diff-highlight = {
-          minus-style = "red";
-          minus-non-emph-style = "red";
-          minus-emph-style = "bold red 52";
-
-          plus-style = "green";
-          plus-non-emph-style = "green";
-          plus-emph-style = "bold green 22";
-
-          whitespace-error-style = "reverse red";
-        };
-
-        # Personal preference for easier reading
-        decorations = {
-          commit-style = "raw"; # Do not recolor meta information
-          keep-plus-minus-markers = true;
-          paging = "always";
-        };
-      };
-    };
-
     # There's more
     extraConfig = {
       # Makes it a bit more readable

modules/home/jujutsu/default.nix

@@ -0,0 +1,101 @@
+{ config, pkgs, lib, ... }:
+let
+  cfg = config.my.home.jujutsu;
+
+  inherit (lib.my) mkMailAddress;
+in
+{
+  options.my.home.jujutsu = with lib; {
+    enable = my.mkDisableOption "jujutsu configuration";
+
+    # I want the full experience by default
+    package = mkPackageOption pkgs "jujutsu" { };
+  };
+
+  config = lib.mkIf cfg.enable {
+    assertions = [
+      {
+        # For `jj git` commands
+        assertion = cfg.enable -> config.my.home.git.enable;
+        message = ''
+          `config.my.home.jujutsu` relies on `config.my.home.git` being enabled.
+        '';
+      }
+    ];
+
+    programs.jujutsu = {
+      enable = true;
+
+      inherit (cfg) package;
+
+      # FIXME:
+      # * verbose commits: https://github.com/jj-vcs/jj/issues/1946
+      #   * including tree-sitter highlights
+      settings = {
+        # Who am I?
+        user = {
+          name = "Bruno BELANYI";
+          email = mkMailAddress "bruno" "belanyi.fr";
+        };
+
+        aliases = {
+          jj = [ "util" "exec" "--" "jj" ];
+          # FIXME:
+          # * topo sort by default (I think? test it)
+          # * still not a big fan of the template
+          lol = [ "log" "-r" "..@" "-T" "builtin_log_oneline" ];
+          lola = [ "lol" "-r" "all()" ];
+          # TODO:
+          # * `pick` (https://github.com/jj-vcs/jj/issues/5446): [ "util" "exec" "--" "bash" "-c" "jj log -p -r \"diff_contains($1)\"" ]
+          # * `root`: `jj workspace root` (barely necessary then)
+        };
+
+        git = {
+          subprocess = true; # FIXME: probably new default starting at 0.27
+        };
+
+        # FIXME: `extraConfig` equivalents...
+
+        # FIXME: from ma_9's config, plus my own stuff
+        # revsets = {
+        #   # git-style log of the entire repo by default
+        #   log = "..@";
+        # }
+        # snapshot = {
+        #   auto-track = "none()";
+        # };
+        #
+        # ui = {
+        #   # default-command = "log"; Some "log-wip" alias instead?
+        #   diff-editor = ":builtin"; # To silence hints
+        #   movement = {
+        #     edit = false;
+        #   };
+        # };
+
+
+        "--scope" = [
+          # Multiple identities
+          {
+            "--when" = {
+              repositories = [ "~/git/EPITA/" ];
+            };
+            user = {
+              name = "Bruno BELANYI";
+              email = mkMailAddress "bruno.belanyi" "epita.fr";
+            };
+          }
+          {
+            "--when" = {
+              repositories = [ "~/git/work/" ];
+            };
+            user = {
+              name = "Bruno BELANYI";
+              email = mkMailAddress "ambroisie" "google.com";
+            };
+          }
+        ];
+      };
+    };
+  };
+}

modules/home/tmux/default.nix

@@ -20,6 +20,8 @@ in
 
     enablePassthrough = mkEnableOption "tmux DCS passthrough sequence";
 
+    enableResurrect = mkEnableOption "tmux-resurrect plugin";
+
     terminalFeatures = mkOption {
       type = with types; attrsOf (submodule {
         options = {
@@ -50,6 +52,7 @@ in
     mouse = false; # I dislike mouse support
     focusEvents = true; # Report focus events
     terminal = "tmux-256color"; # I want accurate termcap info
+    aggressiveResize = true; # Automatic resize when switching client size
 
     plugins = with pkgs.tmuxPlugins; [
       # Open high-lighted files in copy mode
@@ -79,6 +82,13 @@ in
           set -g status-right '#{prefix_highlight} %a %Y-%m-%d %H:%M'
         '';
       }
+      # Resurrect sessions
+      (lib.optionalAttrs cfg.enableResurrect {
+        plugin = resurrect;
+        extraConfig = ''
+          set -g @resurrect-dir '${config.xdg.stateHome}/tmux/resurrect'
+        '';
+      })
     ];
 
     extraConfig = ''