Extended validations for the project names (#5620)

.changes/unreleased/Fixes-20220805-221022.yaml

@@ -0,0 +1,7 @@
+kind: Fixes
+body: Extended validations for the project names
+time: 2022-08-05T22:10:22.746830854+02:00
+custom:
+  Author: Goodkat
+  Issue: "5379"
+  PR: "5620"

core/dbt/task/init.py

@@ -33,6 +33,8 @@
 
 from dbt.include.starter_project import PACKAGE_PATH as starter_project_directory
 
+from dbt.include.global_project import PROJECT_NAME as GLOBAL_PROJECT_NAME
+
 from dbt.task.base import BaseTask, move_to_nearest_project_dir
 
 DOCS_URL = "https://docs.getdbt.com/docs/configure-your-profile"
@@ -258,7 +260,11 @@ def ask_for_adapter_choice(self) -> str:
     def get_valid_project_name(self) -> str:
         """Returns a valid project name, either from CLI arg or user prompt."""
         name = self.args.project_name
-        while not ProjectName.is_valid(name):
+        internal_package_names = {GLOBAL_PROJECT_NAME}
+        available_adapters = list(_get_adapter_plugin_names())
+        for adapter_name in available_adapters:
+            internal_package_names.update(f"dbt_{adapter_name}")
+        while not ProjectName.is_valid(name) or name in internal_package_names:
             if name:
                 click.echo(name + " is not a valid project name.")
             name = click.prompt("Enter a name for your project (letters, digits, underscore)")