Improved create_environment script file; automatic call to 'build.py'…

… if not already present; with instructions at the end to make getting up to speed easier.

devtools/create_environment.py

@@ -7,7 +7,11 @@
 from time import sleep
 
 sys.path.append(Path.cwd().parent.as_posix())
-os.chdir("..")
+
+if not Path("setup.py").exists():
+    print("You're not in the right directory. Run this script from the "
+          r"project's root directory, e.g. 'C:\users\your_user\projects\pyttman'.")
+    exit(-1)
 
 LAB_ENV_PATH = Path.cwd() / Path("dev_env")
 BUILD_OUTPUT_PATH = Path.cwd() / "dist"
@@ -17,10 +21,7 @@
         shutil.rmtree((LAB_ENV_PATH / "venv").as_posix())
 
     if not Path("dist").exists():
-        print("\nCannot create local testing environment as there is no "
-              "build generated for the current local version of Pyttman.",
-              "Run 'build.py' to create one.")
-        exit(-1)
+        subprocess.check_call("python devtools/build.py".split())
 
     LAB_ENV_PATH.mkdir(exist_ok=True)
     os.chdir(LAB_ENV_PATH.as_posix())
@@ -39,5 +40,16 @@
     subprocess.run(f"{venv_python} -m pip install multidict".split())
     subprocess.run(f"{venv_python} -m pip install {package_file}".split())
 
-    print("\nFinished! You can now create an app and start testing in "
-          f"{LAB_ENV_PATH.as_posix()}.")
+    clear_sc = "clear" if os.name == "posix" else "cls"
+    os.system(clear_sc)
+
+    os.system("cls")
+    print("\nFinished! Here's how to get started:",
+          f"1. Activate the virtual environment:\n\tcd dev_env\n\tvenv/scripts/activate",
+          f"2. Run the command 'pyttman' to see available commands to the Pyttman CLI",
+          "3. If it's the first time you're running Pyttman, run 'pyttman new app {app_name}' to create a new project."
+          "4. Run 'pyttman dev {app_name}' to start the development server.",
+          "5. If you've made changes to the Pyttman framework which you want to test in your testing project, "
+          "run this script again. Your app will be left untouched, but the Pyttman version is upgraded to "
+          "your current HEAD in the Pyttman repo.",
+          sep="\n")