Make project picker have dynamic width

project.sh

@@ -4,35 +4,88 @@ set -e
 
 projects_dir=$HOME/Projects
 
-# All depth-2 directories without @ are included unconditionally
-projects=()
-for dir in "$projects_dir"/*/*/; do
+# Print the sorted, de-duplicated list of selectable projects.
+list_projects() {
+  local projects=() dir relative line
+
+  # All depth-2 directories without @ are included unconditionally
+  for dir in "$projects_dir"/*/*/; do
     [ -d "$dir" ] || continue
     relative="${dir#$projects_dir/}"
     relative="${relative%/}"
     [[ "$relative" != *@* ]] && projects+=("$relative")
-done
+  done
 
-# For @ directories, only include those with .git
-if command -v fd &>/dev/null; then
+  # For @ directories, only include those with .git
+  if command -v fd &>/dev/null; then
     while IFS= read -r line; do
       projects+=("$line")
     done < <(fd -H '^\.git$' "$projects_dir" |
       grep '@' |
       sed -E -e "s|^$projects_dir/||" -e 's|/\.git/?$||')
-else
+  else
     while IFS= read -r line; do
       projects+=("$line")
     done < <(find "$projects_dir" \( -name 'node_modules' -o -name '.git' \) \
       -prune -name '.git' -print |
       grep '@' |
       sed -E -e "s|^$projects_dir/||" -e 's|/\.git/?$||')
+  fi
+
+  printf '%s\n' "${projects[@]}" | sort -u
+}
+
+# Second pass: runs inside the popup. Read the list the first pass already
+# built (so the directory scan only happens once) and open the selection.
+if [[ "${1:-}" == --pick ]]; then
+  listfile=$2
+  trap 'rm -f "$listfile"' EXIT
+
+  # Cancelling fzf (Esc/^C) exits non-zero; treat it as "no selection" and
+  # leave quietly, rather than letting the status propagate out of the popup
+  # and print '...project.sh returned 130' in the parent pane.
+  project=$(
+    fzf --layout=reverse --info=hidden --border=rounded --cycle < "$listfile"
+  ) || exit 0
+  [ -n "$project" ] || exit 0
+
+  tmux new-window -n "$project" -c "$projects_dir/$project"
+  ~/.local/share/tmux/layouts/window-auto
+  exit
 fi
 
-project=$(
-  printf '%s\n' "${projects[@]}" | sort -u |
-  fzf --layout=reverse --info=hidden --border=rounded --cycle
-)
+# First pass: scan once, size a popup to fit the longest project name, then
+# re-launch ourselves inside it. fzf has no width of its own — it fills the
+# popup — so the popup width is what we scale.
+listfile=$(mktemp)
+list_projects > "$listfile"
 
-tmux new-window -n "$project" -c "$projects_dir/$project"
-~/.local/share/tmux/layouts/window-auto
+longest=0
+while IFS= read -r line; do
+  if (( ${#line} > longest )); then
+    longest=${#line}
+  fi
+done < "$listfile"
+
+# We're launched from run-shell, which owns no client, so resolve the client
+# that triggered us. It both anchors the popup (-c, without which the popup
+# gets no tty and fzf can't draw) and gives the terminal width for the cap.
+client=$(tmux display -p '#{client_name}')
+cols=$(tmux display -p -c "$client" '#{client_width}')
+
+# Clamp between the original fixed width and 90% of the terminal. In between,
+# pad for fzf's chrome: rounded border (2) + pointer gutter (2) + scrollbar (1)
+# + a column of breathing room.
+min=60
+max=$(( cols * 90 / 100 ))
+width=$(( longest + 6 ))
+(( width < min )) && width=$min
+(( width > max )) && width=$max
+
+flags=(-c "$client" -w "$width" -h 10)
+# Match the borderless popup the keybinding used on tmux >= 3.3.
+if ~/.config/tmux/check-version.sh ">= 3.3"; then
+  flags+=(-B)
+fi
+
+tmux display-popup "${flags[@]}" -E "'$0' --pick '$listfile'"

tmux.conf

@@ -68,7 +68,6 @@ if -b '~/.config/tmux/check-version.sh ">= 3.2" and "< 3.3"' {
   bind H display-popup -w 75% -h 75% -E htop
   bind I display-popup -d '#{pane_current_path}' -E ~/.config/tmux/interpreter.sh
   bind N display-popup -w 75% -h 90% -E ~/.config/tmux/notes.sh
-  bind P display-popup -w 60 -h 10 -E ~/.config/tmux/project.sh
   bind S display-popup -w 60 -h 10 -E ~/.config/tmux/session.sh
   bind T display-popup -d '#{pane_current_path}' -E $SHELL
 }
@@ -79,11 +78,12 @@ if -b '~/.config/tmux/check-version.sh ">= 3.3"' {
   bind H display-popup -S fg=#54546D -b rounded -w 50% -h 75% -E htop
   bind I display-popup -S fg=#54546D -b rounded -d '#{pane_current_path}' -E ~/.config/tmux/interpreter.sh
   bind N display-popup -S fg=#54546D -b rounded -w 75% -h 90% -E ~/.config/tmux/notes.sh
-  bind P display-popup -B -w 60 -h 10 -E ~/.config/tmux/project.sh
   bind S display-popup -B -w 60 -h 10 -E ~/.config/tmux/session.sh
   bind T display-popup -S fg=#54546D -d '#{pane_current_path}' -E $SHELL
 }
 
+bind P run-shell ~/.config/tmux/project.sh
+
 # Restore old next/previous window bindings
 bind C-n next-window
 bind C-p previous-window