From d9996742bee2d87e0a90d771da10c641cbbe1603 Mon Sep 17 00:00:00 2001
From: Ramon Roche <mrpollo@gmail.com>
Date: Wed, 11 Feb 2026 10:27:13 -0800
Subject: [PATCH] setup: drop Ubuntu 18.04/20.04 support from ubuntu.sh

Remove Gazebo Classic installation branches for Ubuntu 18.04 and 20.04.
The script now only supports Ubuntu 22.04 and 24.04 with Gazebo Harmonic.

Supported Ubuntu LTS versions going forward:
- Ubuntu 24.04 (primary, used in CI and release builds)
- Ubuntu 22.04 (secondary, still supported)

When Ubuntu 26.04 LTS releases we will bump to 26.04/24.04.

Signed-off-by: Ramon Roche <mrpollo@gmail.com>
---
 Tools/setup/ubuntu.sh | 43 ++++++++++++-------------------------------
 1 file changed, 12 insertions(+), 31 deletions(-)

diff --git a/Tools/setup/ubuntu.sh b/Tools/setup/ubuntu.sh
index a1cbc78864..f84db9a603 100755
--- a/Tools/setup/ubuntu.sh
+++ b/Tools/setup/ubuntu.sh
@@ -6,9 +6,9 @@ set -e
 ## Can also be used in docker.
 ##
 ## Installs:
-## - Common dependencies and tools for nuttx, jMAVSim, Gazebo
+## - Common dependencies and tools for nuttx, Gazebo
 ## - NuttX toolchain (omit with arg: --no-nuttx)
-## - jMAVSim and Gazebo9 simulator (omit with arg: --no-sim-tools)
+## - Gazebo Harmonic simulator (omit with arg: --no-sim-tools)
 ##
 
 INSTALL_NUTTX="true"
@@ -207,37 +207,18 @@ if [[ $INSTALL_SIM == "true" ]]; then
 		bc \
 		;
 
-	# Gazebo / Gazebo classic installation
-	if [[ "${UBUNTU_RELEASE}" == "18.04" || "${UBUNTU_RELEASE}" == "20.04" ]]; then
-		sudo sh -c 'echo "deb http://packages.osrfoundation.org/gazebo/ubuntu-stable `lsb_release -cs` main" > /etc/apt/sources.list.d/gazebo-stable.list'
-		wget http://packages.osrfoundation.org/gazebo.key -O - | sudo apt-key add -
-		# Update list, since new gazebo-stable.list has been added
-		sudo apt-get update -y --quiet
+	# Gazebo Harmonic installation (Ubuntu 22.04+)
+	echo "[ubuntu.sh] Gazebo (Harmonic) will be installed"
+	# Add Gazebo binary repository
+	sudo wget https://packages.osrfoundation.org/gazebo.gpg -O /usr/share/keyrings/pkgs-osrf-archive-keyring.gpg
+	echo "deb [arch=$(dpkg --print-architecture) signed-by=/usr/share/keyrings/pkgs-osrf-archive-keyring.gpg] http://packages.osrfoundation.org/gazebo/ubuntu-stable $(lsb_release -cs) main" | sudo tee /etc/apt/sources.list.d/gazebo-stable.list > /dev/null
+	sudo apt-get update -y --quiet
 
-		# Install Gazebo classic
-		if [[ "${UBUNTU_RELEASE}" == "18.04" ]]; then
-			gazebo_classic_version=9
-			gazebo_packages="gazebo$gazebo_classic_version libgazebo$gazebo_classic_version-dev"
-		else
-			# default and Ubuntu 20.04
-			gazebo_classic_version=11
-			gazebo_packages="gazebo$gazebo_classic_version libgazebo$gazebo_classic_version-dev"
-		fi
-	else
-		# Expects Ubuntu 22.04 > by default
-		echo "[ubuntu.sh] Gazebo (Harmonic) will be installed"
-		echo "[ubuntu.sh] Earlier versions will be removed"
-		# Add Gazebo binary repository
-		sudo wget https://packages.osrfoundation.org/gazebo.gpg -O /usr/share/keyrings/pkgs-osrf-archive-keyring.gpg
-		echo "deb [arch=$(dpkg --print-architecture) signed-by=/usr/share/keyrings/pkgs-osrf-archive-keyring.gpg] http://packages.osrfoundation.org/gazebo/ubuntu-stable $(lsb_release -cs) main" | sudo tee /etc/apt/sources.list.d/gazebo-stable.list > /dev/null
-		sudo apt-get update -y --quiet
+	# Install Gazebo
+	gazebo_packages="gz-harmonic libunwind-dev"
 
-		# Install Gazebo
-		gazebo_packages="gz-harmonic libunwind-dev"
-
-		if [[ "${UBUNTU_RELEASE}" == "24.04" ]]; then
-			gazebo_packages="$gazebo_packages cppzmq-dev"
-		fi
+	if [[ "${UBUNTU_RELEASE}" == "24.04" ]]; then
+		gazebo_packages="$gazebo_packages cppzmq-dev"
 	fi
 
 	sudo DEBIAN_FRONTEND=noninteractive apt-get -y --quiet --no-install-recommends install \