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tools.tmux: add session manager with fzf popup
author
lassulus
date
(Feb 19, 2026, 12:33 AM CET)
commit
eca9bf42
eca9bf42907aec55c6c801117583f95ff0de082d
parent
2f9789d2
2f9789d2f431ffcd626350903afc0afcca2ba774
+33
+33
tools/tmux/flake-module.nix
+33
tools/tmux/flake-module.nix
···
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perSystem =
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{ pkgs, ... }:
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let
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sessionManager = pkgs.writeShellScript "tmux-session-manager" ''
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while true; do
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existing=$(tmux list-sessions -F '#{session_name}: #{session_windows} windows (created #{session_created_string})#{?session_attached, (attached),}' 2>/dev/null)
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[[ -z "$existing" ]] && break
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chosen=$(echo -e ">>> new session <<<\n$existing" \
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| ${pkgs.fzf}/bin/fzf --height=80% --reverse \
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--header="Pick a tmux session (DEL to kill)" \
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--expect=delete \
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--preview='s={1}; s=''${s%:}; [ "$s" = ">>>" ] && echo "Create a new session" || tmux capture-pane -t "$s" -p -e 2>/dev/null' \
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--preview-window=down:50%)
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key=$(echo "$chosen" | head -1)
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selection=$(echo "$chosen" | tail -1)
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chosen_name=$(echo "$selection" | cut -d: -f1)
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if [[ "$key" == "delete" && -n "$chosen_name" && "$chosen_name" != ">>> new session <<<" ]]; then
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tmux kill-session -t "$chosen_name" 2>/dev/null
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continue
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fi
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if [[ -n "$chosen_name" && "$chosen_name" != ">>> new session <<<" ]]; then
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tmux switch-client -t "$chosen_name"
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exit 0
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fi
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break
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done
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# Create a new session
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session_name=$(${
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self.packages.${pkgs.system}.name-generator
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}/bin/name-generator 2>/dev/null || echo "session-$$")
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tmux new-session -d -s "$session_name"
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tmux switch-client -t "$session_name"
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'';
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tmuxConfigText = ''
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set-option -g default-terminal screen-256color
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···
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set -g allow-passthrough on
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set -ga update-environment TERM
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set -ga update-environment TERM_PROGRAM
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# Session manager popup (prefix + s)
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bind s display-popup -E -w 80% -h 80% "${sessionManager}"
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'';
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tmuxConfigFile = pkgs.writeText "tmux.conf" tmuxConfigText;
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in