Add tmux fzf session chooser

Added tmux session chooser. Aliased to `tm`, calling `tmux_attach_start`
(the original tm script).

When called without arguments displays a fzf list of currently running
tmux sessions, with a preview to their respective open panes. A session
can be chosen in fzf which tmux will attach itself to. When creating a
query in fzf which does not have a valid target and confirming, tmux
will automatically create that session and attach itself to it.

When called with an argument, tmux will attach itself or create a
session of the same name. If called with the name of a session file, as
before, tmux will automatically execute that session file and attach
itself to it.

tmux/.config/sh/alias.d/tmux.sh

@@ -0,0 +1,49 @@
+#!/usr/bin/env sh
+
+exist() { type "$1" >/dev/null 2>&1; }
+
+# show a list of running tmux sessions
+alias tl='tmux list-sessions -F "#{session_name}" 2>/dev/null'
+
+# fzf
+if exist fzf; then
+  # fzf select a tmux session to connect to, with pane preview
+  alias tm='fzf_tmux'
+fi
+
+fzf_tmux() {
+  if [ -z "$1" ]; then
+    result=$(
+      tl | fzf \
+        --layout=reverse \
+        --height=50% \
+        --border \
+        --prompt="Session> " \
+        --preview="tmux_pane_tree {}" \
+        --preview-window=right:99% \
+        --print-query
+    )
+    case "$?" in
+    0)
+      # found a session, attaching
+      tmux_attach_start "$(echo "$result" | tail --lines=1)"
+      ;;
+    1)
+      # did not find a session, creating
+      result=$(echo "$result" | head --lines=1)
+      # if . was only thing entered, create one for current dir
+      if [ "$result" = "." ]; then
+        tmux_attach_start
+        # create for query name
+      else
+        tmux_attach_start "$result"
+      fi
+      ;;
+    esac
+  else
+    tmux_attach_start "$1"
+  fi
+}
+
+unset choice
+unset -f exist

tmux/.config/tmux/sessions/dot.session

@@ -7,6 +7,6 @@ select-pane -t 1
 split-window -v watch -t -n 1 -c 'cd ~/.dotfiles; git -c color.ui=always log --graph --date=short --decorate --oneline --all --remotes'
 select-pane -t 4
 new-window -n code
-send-keys "cd ~/.dotfiles; vim ." C-m I
+send-keys "cd ~/.dotfiles; v ." C-m I
 new-window -n test
 select-window -t 1

tmux/.config/tmux/tmux.conf

@@ -58,7 +58,7 @@ set -g @plugin 'Morantron/tmux-fingers'
 set -g @plugin 'christoomey/vim-tmux-navigator'
 set -g @plugin 'tmux-plugins/tmux-resurrect'
 
-if "test ! -d ${TMUX_PLUGIN_MANAGER_PATH}/tpm" \
+if "test ! -z ${TMUX_PLUGIN_MANAGER_PATH} && test ! -d ${TMUX_PLUGIN_MANAGER_PATH}/tpm" \
    "run 'git clone https://github.com/tmux-plugins/tpm {TMUX_PLUGIN_MANAGER_PATH}/tpm && {TMUX_PLUGIN_MANAGER_PATH}/tpm/bin/install_plugins'"
 
 run -b "${TMUX_PLUGIN_MANAGER_PATH}/tpm/tpm"

tmux/.local/bin/tmux_pane_tree

@@ -0,0 +1,20 @@
+#!/usr/bin/env bash
+# create a tree-style view
+# of all open tmux panes
+# and the command they are currently running
+
+tmux ls -F'#{session_id}' | while read -r s; do
+  S=$(tmux ls -F'#{session_id}#{session_name}: #{T:tree_mode_format}' | grep ^"$s")
+  session_info=${S##$s}
+  session_name=$(echo "$session_info" | cut -d ':' -f 1)
+  if [[ -n "$1" ]] && [[ "$1" == "$session_name" ]]; then
+    echo -e "\033[1;34m$session_info\033[0m"
+    tmux lsw -t"$s" -F'#{window_id}' | while read -r w; do
+      W=$(tmux lsw -t"$s" -F'#{window_id}#{T:tree_mode_format} - #{pane_current_command}' | grep ^"$w")
+      H=$(tmux lsw -t"$s" -F'#{window_id}#H' | grep ^"$w")
+      echo "  ﬌ ${W##$w}" | sed "s/\"${H##$w}\" //"
+    done
+  else
+    echo -e "\033[1m$session_info\033[0m"
+  fi
+done