Support empty commit when no downloaded resources

Author: woojiahao

app/commands/download.py

@@ -18,7 +18,7 @@
     get_username,
     has_fork,
 )
-from app.utils.git_cli_utils import add_all, commit, init
+from app.utils.git_cli_utils import add_all, commit, empty_commit, init
 from app.utils.gitmastery_utils import (
     download_file,
     execute_py_file_function_from_url,
@@ -88,8 +88,11 @@ def setup_exercise_folder(
 
     if config.exercise_repo.init:
         init(verbose)
-        add_all(verbose)
-        commit("Initial commit", verbose)
+        if download_resources:
+            add_all(verbose)
+            commit("Initial commit", verbose)
+        else:
+            empty_commit("Initial commit", verbose)
 
     info("Executing download setup")
     execute_py_file_function_from_url(

app/utils/git_cli_utils.py

@@ -19,6 +19,13 @@ def commit(message: str, verbose: bool) -> None:
     subprocess.run(["git", "commit", "-m", message], stdout=stdout, stderr=stderr)
 
 
+def empty_commit(message: str, verbose: bool) -> None:
+    stdout, stderr = get_stdout_stderr(verbose)
+    subprocess.run(
+        ["git", "commit", "-m", message, "--allow-empty"], stdout=stdout, stderr=stderr
+    )
+
+
 def push(remote: str, branch: str, verbose: bool) -> None:
     stdout, stderr = get_stdout_stderr(verbose)
     subprocess.run(["git", "push", "-u", remote, branch], stdout=stdout, stderr=stderr)