From 129d77471b13daa8c4c3915ab535c7170fd5d18c Mon Sep 17 00:00:00 2001
From: dissimulo <connect+gitea@dustin-williams.com>
Date: Tue, 21 Apr 2026 07:10:13 -0700
Subject: [PATCH] tmux-ip: prefer DigitalOcean reserved/floating IP when on a
 droplet

If /sys/class/dmi/id/sys_vendor says DigitalOcean and the droplet has
a reserved_ip or floating_ip assigned, use that over the ipify-based
egress IP. Keeps the ipify/hostname -I fallback intact for other hosts.

Gated on the DMI check so non-DO hosts skip the metadata probe entirely
and the tmux status bar refresh stays fast.
---
 .local/bin/tmux-ip | 33 ++++++++++++++++++++++++++++++++-
 README.md          |  5 +++--
 2 files changed, 35 insertions(+), 3 deletions(-)

diff --git a/.local/bin/tmux-ip b/.local/bin/tmux-ip
index 929c334c..0f589fca 100755
--- a/.local/bin/tmux-ip
+++ b/.local/bin/tmux-ip
@@ -1,2 +1,33 @@
 #!/bin/bash
-curl -s --connect-timeout 3 https://api.ipify.org 2>/dev/null || hostname -I | awk '{print $1}'
+#
+# Print the "best" IP for the tmux status bar.
+# Preference: DO reserved/floating IP > public egress (ipify) > first local IP.
+#
+
+set -u
+
+META="http://169.254.169.254/metadata/v1"
+CURL="curl -sf --connect-timeout 1 --max-time 2"
+
+is_digitalocean() {
+  [ -r /sys/class/dmi/id/sys_vendor ] \
+    && grep -qi digitalocean /sys/class/dmi/id/sys_vendor
+}
+
+do_anchor_ip() {
+  local kind active ip
+  for kind in reserved_ip floating_ip; do
+    active=$($CURL "$META/$kind/ipv4/active" 2>/dev/null) || continue
+    [ "$active" = "true" ] || continue
+    ip=$($CURL "$META/$kind/ipv4/address" 2>/dev/null) || continue
+    [ -n "$ip" ] && { printf '%s\n' "$ip"; return 0; }
+  done
+  return 1
+}
+
+if is_digitalocean && do_anchor_ip; then
+  exit 0
+fi
+
+curl -s --connect-timeout 3 https://api.ipify.org 2>/dev/null \
+  || hostname -I | awk '{print $1}'
diff --git a/README.md b/README.md
index c3b74845..78664977 100644
--- a/README.md
+++ b/README.md
@@ -37,8 +37,9 @@ On top of stock YADR:
 
 - **`.tmux.conf`** — real file (not the YADR symlink), with internal/public IP
   in the status bar and 80k-line scrollback
-- **`.local/bin/tmux-ip`** — helper used by `.tmux.conf`; prefers internal IP
-  with a public-IP fallback
+- **`.local/bin/tmux-ip`** — helper used by `.tmux.conf`; prefers a
+  DigitalOcean reserved/floating IP if the host is a droplet with one
+  attached, falls back to public egress (ipify) and then first local IP
 - **`.irssi/`** — IRC client config (no credentials committed)
 - **`.fonts/`** — Inconsolata, Menlo-Powerline, mensch-Powerline, monof55/56
 - **`.themes/`** — BlackMATE v2 / v2.2 / "The Blues" GNOME metathemes