migrate existing .bashrc_local and .bashrc_paths into repo on setup

setup_env.sh

@@ -52,15 +52,35 @@ create_symlink() {
   ln -s "$target" "$link_name"
 }
 
+# Like create_symlink, but if the dotfiles/ target doesn't exist yet and the
+# home file is a real file (not a symlink), migrate it into the repo first.
+# Used for gitignored files (.bashrc_local, .bashrc_paths) so existing machine
+# config is preserved rather than buried in a .backup file.
+migrate_and_link() {
+  local target=$1
+  local link_name=$2
+
+  if [[ ! -e "$target" && -f "$link_name" && ! -L "$link_name" ]]; then
+    echo "Migrating existing $link_name -> $target"
+    cp "$link_name" "$target"
+  fi
+
+  create_symlink "$target" "$link_name"
+}
+
 # Deploy configuration files as symlinks
 deploy_configs() {
   echo "Deploying configuration files as symlinks..."
-  CONFIG_DIR="$(pwd)/dotfiles"  # Use the local 'dotfiles' directory in the repo
+  CONFIG_DIR="$(pwd)/dotfiles"
 
-  for config in .bashrc .bashrc_local .bashrc_paths .vimrc .gitconfig .pspgconf .psqlrc .tmux.conf ; do
+  for config in .bashrc .vimrc .gitconfig .pspgconf .psqlrc .tmux.conf ; do
     create_symlink "$CONFIG_DIR/$config" ~/$config
   done
 
+  for config in .bashrc_local .bashrc_paths ; do
+    migrate_and_link "$CONFIG_DIR/$config" ~/$config
+  done
+
   echo "Sourcing .bashrc..."
   source ~/.bashrc
 }