Checking if node exists before building the web UI from PlatformIO

code/extra_scripts.py

@@ -8,6 +8,8 @@ from subprocess import call
 import click
 from platformio import util
 
+import distutils.spawn
+
 Import("env")
 
 # ------------------------------------------------------------------------------
@@ -81,10 +83,13 @@ def check_size(source, target, env):
         print_filler("*", color=Color.LIGHT_YELLOW, err=True)
 
 def build_webui(env):
-    config = util.load_project_config()
-    kv = dict(config.items("env:" + env.get('PIOENV')))
-    modules = kv["modules"] if "modules" in kv else "all"
-    env.Execute("WEBUI_MODULES=\"%s\" node node_modules/gulp/bin/gulp.js" % modules)
+    if distutils.spawn.find_executable("node"):
+        config = util.load_project_config()
+        kv = dict(config.items("env:" + env.get('PIOENV')))
+        modules = kv["modules"] if "modules" in kv else "all"
+        env.Execute("WEBUI_MODULES=\"%s\" node node_modules/gulp/bin/gulp.js" % modules)
+    else:
+        print_warning("Not building the web UI image ('node' does not exist in the path)")
 
 # ------------------------------------------------------------------------------
 # Hooks