Allow for lazy-install of bun runtime

bin/omarchy-npx-install

@@ -29,22 +29,40 @@ fi
 node_bin="\$node_root/bin/node"
 npx_bin="\$node_root/bin/npx"
 
+ensure_bin_runtime() {
+  local bin_path=\$1
+  local shebang
+
+  IFS= read -r shebang < "\$bin_path"
+
+  if [[ \$shebang == "#!"*"/bun"* || \$shebang == "#!"*"/env bun"* ]]; then
+    if omarchy-cmd-missing bun; then
+      echo "Installing bun runtime for \$package..."
+      omarchy-pkg-add bun
+      hash -r
+    fi
+  fi
+}
+
+exec_package_bin() {
+  local package_bin_path=\$1
+
+  if [[ -n \$package_bin_path ]]; then
+    ensure_bin_runtime "\$package_bin_path"
+    PATH="\$node_root/bin:\$PATH" exec "\$package_bin_path" "\$@"
+  fi
+}
+
 # Resolve the package bin inside npx, then run it with node@latest available for node shebangs.
 # Some wrappers are aliases, e.g. playwright-cli wraps the playwright bin.
 "\$node_bin" "\$npx_bin" --yes --prefer-online --package "\$package" -- true
 
 package_bin_path=\$("\$node_bin" "\$npx_bin" --yes --package "\$package" -- which "\$package" 2>/dev/null)
-
-if [[ -n \$package_bin_path ]]; then
-  PATH="\$node_root/bin:\$PATH" exec "\$package_bin_path" "\$@"
-fi
+exec_package_bin "\$package_bin_path" "\$@"
 
 # Scoped packages like @openai/codex expose an unscoped bin like codex.
 package_bin_path=\$("\$node_bin" "\$npx_bin" --yes --package "\$package" -- which "\$command" 2>/dev/null)
-
-if [[ -n \$package_bin_path ]]; then
-  PATH="\$node_root/bin:\$PATH" exec "\$package_bin_path" "\$@"
-fi
+exec_package_bin "\$package_bin_path" "\$@"
 
 echo "Could not resolve npm bin for \$package / \$command" >&2
 exit 127