Merge pull request 'Rewrite tmux-sessionizer in bash' (#16) from bash-sessionizer into trunk

Reviewed-on: https://codeberg.org/leana8959/.files/pulls/16

nix/configurations/vanadium/home/programs.nix

@@ -23,6 +23,7 @@
         pkgs.hutils
         pkgs.miniserve
         pkgs.agenix
+        pkgs.tmux-sessionizer
 
         # pdf
         pkgs.poppler_utils # pdfseparate, pdfunite

nix/homeModules/common/fish/default.nix

@@ -23,11 +23,10 @@ in {
   programs.direnv.config.whitelist.prefix = [(config.home.sessionVariables.REPO_PATH + "/leana8959")];
   programs.tmux.extraConfig = lib.mkBefore ''
     # sessionizer binds
-    bind -n C-f run-shell "tmux new-window ${fishExe} -c tmux-sessionizer"
-    bind -n C-g run-shell "${fishExe} -c tmux-home"
-    bind s run-shell "${fishExe} -c tmux-last"
+    bind -n C-f run-shell "tmux new-window tmux-sessionizer"
+    bind s run-shell "tmux-last"
   '';
-  programs.kitty.settings.shell = ''${fishExe} --command="tmux-home"'';
+  programs.kitty.settings.shell = ''${fishExe}'';
 
   #
   # Script dependencies
@@ -53,11 +52,21 @@ in {
   #
   # Scripts and functions
   #
-  xdg.configFile =
-    lib.mapAttrs'
-    (path: _:
-      lib.nameValuePair "fish/functions/${path}" {source = "${./functions}/${path}";})
-    (builtins.readDir ./functions);
+  xdg.configFile = let
+    allFunctions =
+      lib.mapAttrs'
+      (path: _:
+        lib.nameValuePair "fish/functions/${path}" {source = "${./functions}/${path}";})
+      (builtins.readDir ./functions);
+  in
+    builtins.removeAttrs allFunctions [
+      "fish/functions/__tmux-attach-or-switch.fish"
+      "fish/functions/__tmux-maybe-create.fish"
+      "fish/functions/__tmux-register-session.fish"
+      "fish/functions/tmux-home.fish"
+      "fish/functions/tmux-last.fish"
+      "fish/functions/tmux-sessionizer.fish"
+    ];
 
   programs.fish = {
     interactiveShellInit = builtins.readFile ./shellInit.fish;

nix/nixosModules/extra/leana.nix

@@ -6,7 +6,6 @@
   #
   # My user
   #
-  programs.fish.enable = true;
   nix.settings.trusted-users = ["leana"];
   users.users."leana" = {
     isNormalUser = true;
@@ -14,7 +13,7 @@
     description = "Leana";
     group = "leana";
     extraGroups = ["wheel"];
-    shell = pkgs.fish;
+    shell = pkgs.bash;
     openssh.authorizedKeys.keys = config.users.users.root.openssh.authorizedKeys.keys;
   };
   users.groups.leana = {};

nix/packages/by-name/tmux-sessionizer/package.nix

@@ -0,0 +1,127 @@
+{
+  writeShellApplication,
+  tmux,
+  procps,
+  fzf,
+  gnused,
+  lib,
+  symlinkJoin,
+}: let
+  tmux-register-session = writeShellApplication {
+    name = "__tmux-register-session";
+    runtimeInputs = [tmux];
+    text = ''
+      last=/tmp/TMUX_LAST
+
+      # bail if tmux not running
+      if ! pgrep tmux >/dev/null 2>&1; then
+        exit 1
+      fi
+
+      this="$(tmux display-message -p '#S')"
+      if [ ! -f "$last" ] || [ "$(cat "$last")" != "$this" ]; then
+          echo "$this" >"$last"
+      fi
+    '';
+  };
+
+  tmux-maybe-create = writeShellApplication {
+    name = "__tmux-maybe-create";
+    runtimeInputs = [procps tmux];
+    text = ''
+      session_name="$1"
+      session_dir="$2"
+
+      if ! pgrep tmux >/dev/null 2>&1 || ! tmux has -t="$session_name" 2>/dev/null; then
+          tmux new-session -ds "$session_name" -c "$session_dir"
+      fi
+    '';
+  };
+
+  tmux-attach-or-switch = writeShellApplication {
+    name = "__tmux-attach-or-switch";
+    runtimeInputs = [tmux];
+    text = ''
+      session_name="$1"
+      TMUX=''${TMUX:-}
+
+      if [ -z "$TMUX" ]; then
+          tmux attach-session -t "$session_name"
+      else
+          tmux switch-client -t "$session_name"
+      fi
+    '';
+  };
+
+  tmux-last = writeShellApplication {
+    name = "tmux-last";
+    text = ''
+      tmux_last=/tmp/TMUX_LAST
+      if [ ! -f $tmux_last ]; then
+          echo "Last session is not yet set"
+          return 1
+      fi
+
+      session_name="$(cat $tmux_last)"
+      session_path="$session_name"
+      if [ ! -d "$session_path" ]; then
+        session_path="/tmp"
+      fi
+
+      # bail if not in tmux, nothing to register
+      ${lib.getExe tmux-register-session} || :
+      ${lib.getExe tmux-maybe-create} "$session_name" "$session_path"
+      ${lib.getExe tmux-attach-or-switch} "$session_name"
+    '';
+  };
+
+  tmux-sessionizer = writeShellApplication {
+    name = "tmux-sessionizer";
+    runtimeInputs = [fzf gnused];
+    text = ''
+      selected=$(
+        {
+          fd . "$REPO_PATH" --exact-depth 2 --hidden --type d
+          fd . "$WORKTREE_PATH" --exact-depth 3 --hidden --type d
+          fd . "$PLAYGROUND_PATH" --exact-depth 1 --hidden --type d
+          echo "dotfiles"
+          echo "password-store"
+        } 2> /dev/null | sed -e "s|^$HOME|~|" | fzf)
+      selected=''${selected//\~/$HOME}
+
+      if [ -z "$selected" ]; then
+          return 0
+      fi
+
+      # derive session name based on selected path
+      # dots are meaningful in tmux, remove them
+      session_name=''${selected//./_}
+
+      # fixup special cases, override derived session_name if necessary
+      # this should be id for non-special cases
+      case "$selected" in
+          dotfiles)
+              selected=~/.dotfiles
+              ;;
+          password-store)
+              selected="$PASSWORD_STORE_DIR"
+              ;;
+      esac
+
+      # effects
+      ${lib.getExe tmux-register-session} || :
+      ${lib.getExe tmux-maybe-create} "$session_name" "$selected"
+      ${lib.getExe tmux-attach-or-switch} "$session_name"
+    '';
+  };
+in
+  symlinkJoin {
+    name = "tmux-sessionizer";
+    paths = [
+      tmux-register-session
+      tmux-maybe-create
+      tmux-attach-or-switch
+      tmux-last
+      tmux-sessionizer
+    ];
+  }