克隆后还缺仿真安装树和两边的编译目录。把 build、build_sim、install_sim 一并放进仓库；仿真入口不再写死本机 conda，build 里指向源码的链接改成相对路径。

Co-authored-by: Cursor <cursoragent@cursor.com>

install_sim/setup.bash

@@ -0,0 +1,42 @@
+# generated from colcon_bash/shell/template/prefix_chain.bash.em
+
+# This script extends the environment with the environment of other prefix
+# paths which were sourced when this file was generated as well as all packages
+# contained in this prefix path.
+
+# function to source another script with conditional trace output
+# first argument: the path of the script
+_colcon_prefix_chain_bash_source_script() {
+  if [ -f "$1" ]; then
+    if [ -n "$COLCON_TRACE" ]; then
+      echo "# . \"$1\""
+    fi
+    . "$1"
+  else
+    echo "not found: \"$1\"" 1>&2
+  fi
+}
+
+# source chained prefixes
+# setting COLCON_CURRENT_PREFIX avoids determining the prefix in the sourced script
+# 不写死某一台机器的 conda。已激活的环境优先，否则找当前用户的 ros_gz_sim。
+if [ -n "${CONDA_PREFIX:-}" ] && [ -f "${CONDA_PREFIX}/local_setup.bash" ]; then
+  COLCON_CURRENT_PREFIX="${CONDA_PREFIX}"
+elif [ -f "${HOME}/anaconda3/envs/ros_gz_sim/local_setup.bash" ]; then
+  COLCON_CURRENT_PREFIX="${HOME}/anaconda3/envs/ros_gz_sim"
+elif [ -f "${HOME}/miniconda3/envs/ros_gz_sim/local_setup.bash" ]; then
+  COLCON_CURRENT_PREFIX="${HOME}/miniconda3/envs/ros_gz_sim"
+else
+  COLCON_CURRENT_PREFIX=""
+fi
+if [ -n "${COLCON_CURRENT_PREFIX}" ]; then
+  _colcon_prefix_chain_bash_source_script "$COLCON_CURRENT_PREFIX/local_setup.bash"
+fi
+
+# source this prefix
+# setting COLCON_CURRENT_PREFIX avoids determining the prefix in the sourced script
+COLCON_CURRENT_PREFIX="$(builtin cd "`dirname "${BASH_SOURCE[0]}"`" > /dev/null && pwd)"
+_colcon_prefix_chain_bash_source_script "$COLCON_CURRENT_PREFIX/local_setup.bash"
+
+unset COLCON_CURRENT_PREFIX
+unset _colcon_prefix_chain_bash_source_script