fix(dev): faulty main and boot.py were sometimes reported as missing

Author: jakobrosenberg

src/Watcher/scripts.js

@@ -19,21 +19,28 @@ const scripts = {
       `    if sys.modules[name].__file__ in ${JSON.stringify(modulesToDelete)}:`,
       '      print("[dev] Clear module: " + sys.modules[name].__file__)',
       "      del sys.modules[name]",
+
       "try:",
       "  print('[dev] Import boot.py')",
       "  import boot",
-      "except ImportError:",
-      "  print('[dev] No boot.py found. Skipped.')",
-      "except Exception:",
-      "  print('[dev] Exception in boot.py')",
-      "  raise",
+      "except KeyboardInterrupt: pass",
+      "except Exception as e:",
+      "  if(str(e) == \"no module named 'boot'\"):",
+      "    print('[dev] No boot.py found. Skipped.')",
+      "  else:",
+      "    print('[dev] Could not import boot.py.')",
+      "    raise e",
+
       "try:",
       "  print('[dev] Import main.py')",
       "  import main",
       "except KeyboardInterrupt: pass",
-      "except ImportError:",
-      "  print('[dev] No main.py found. Skipped.')",
-      "except Exception as e: raise e;",
+      "except Exception as e:",
+      "  if(str(e) == \"no module named 'main'\"):",
+      "    print('[dev] No main.py found. Skipped.')",
+      "  else:",
+      "    print('[dev] Could not import main.py.')",
+      "    raise e",
       "",
     ]
       .filter(Boolean)

test/suite/integration/devmode.basic.test.js

@@ -58,6 +58,10 @@ test("can use devmode", async () => {
     writeFileSync(projectPath1 + "/main.py", 'print("hello world again again")');
     await new Promise((resolve) => device.readUntil("hello world again again", resolve));
   });
+  test('bad code in main.py is printed correctly"', async () => {
+    writeFileSync(projectPath1 + "/main.py", "bad code");
+    await new Promise((resolve) => device.readUntil("SyntaxError: invalid syntax", resolve));
+  });
   test("can stop devMode", async () => {
     await pymakr.commands.stopDevMode({ project });
     assert(!project.watcher.active);