webbundle: add conditions to execute

webbundle
- only npm ci if not exists
- only npm run build if not exists or newer

tools/webbundle.py

@@ -1,5 +1,7 @@
 Import("env")
 import shutil
+import glob
+import os
 
 cmd_ex = shutil.which("node")
 # Check if Node.js is not installed
@@ -9,12 +11,26 @@
     # Install the necessary node packages for the pre-build asset bundling script
     print('\x1b[6;33;42m' + 'Install the node packages' + '\x1b[0m')
 
-    # npm ci performs a clean install of all existing dependencies
-    env.Execute("npm ci")
+    # npm ci performs a clean install of all existing dependencies, if not installed
+    if not os.path.isdir('node_modules'):
+        env.Execute("npm ci")
+
+    # if html_ui does not exist, create it (and others)
+    if not os.path.exists('src/html_ui.h'):
+        env.Execute("npm run build")
+
+    latest_source = max(glob.glob('data/*.*'), key=os.path.getmtime) #any file in data folder
+    latest_export = max(glob.glob('src/html_*.h'), key=os.path.getmtime)
+
+    # if any files in data newer then html_*.h, recreate it (and others)
+    if os.path.getmtime(latest_source) > os.path.getmtime(latest_export):
+        print ('  updated file(s) in /data -> npm run build')
+        env.Execute("npm run build")
 
     # Call the bundling script
-    exitCode = env.Execute("node tools/cdata.js")
+    # exitCode = env.Execute("node tools/cdata.js")
 
     # If it failed, abort the build
-    if (exitCode):
-      Exit(exitCode)
+    # if (exitCode):
+    #   Exit(exitCode)
+