Adds a --populate flag (#15)

* Adding --populate flag for existing directories

* Black formatting

src/fprime_bootstrap/__main__.py

@@ -46,6 +46,12 @@ def main():
         type=str,
         help="Version of F´ to checkout (default: latest release)",
     )
+    project_parser.add_argument(
+        "--populate",
+        action="store_true",
+        default=False,
+        help="Populate an existing direcory with a new F´ project (default: False)",
+    )
 
     clone_parser = subparsers.add_parser(
         "clone", help="Clone an existing remote F´ project"

src/fprime_bootstrap/bootstrap_project.py

@@ -45,14 +45,18 @@ def bootstrap_project(parsed_args: "argparse.Namespace"):
     target_dir = Path(parsed_args.path)
     # Ask user for project name
     project_name = (
-        input(f"Project name ({DEFAULT_PROJECT_NAME}): ") or DEFAULT_PROJECT_NAME
+        (input(f"Project name ({DEFAULT_PROJECT_NAME}): ") or DEFAULT_PROJECT_NAME)
+        if not parsed_args.populate
+        else target_dir.name
     )
     check_project_name(project_name)
 
-    project_path = target_dir / project_name
+    project_path = target_dir / project_name if not parsed_args.populate else target_dir
 
     try:
-        generate_boilerplate_project(project_path, project_name)
+        generate_boilerplate_project(
+            project_path, project_name, populate=parsed_args.populate
+        )
         setup_git_repo(project_path, parsed_args.tag)
         if not parsed_args.no_venv:
             setup_venv(project_path)
@@ -178,11 +182,13 @@ def setup_git_repo(project_path: Path, tag: str):
         sys.exit(1)
 
 
-def generate_boilerplate_project(project_path: Path, project_name: str):
+def generate_boilerplate_project(
+    project_path: Path, project_name: str, populate: bool = False
+):
     """Generates a new project"""
     source = Path(__file__).parent / "templates/fprime-project-template"
     # copy files from template into target path
-    shutil.copytree(source, project_path)
+    shutil.copytree(source, project_path, dirs_exist_ok=populate)
 
     # Iterate over all template files and replace {{FPRIME_PROJECT_NAME}} placeholder with project_name
     for file in project_path.rglob("*-template"):