fix: don't switch current working git branch when determining model c…

…hanges (#789)

**Reason for Change**:

don't switch current working git branch when determining model changes.
this behavior is unacceptable in e2e action steps.

Signed-off-by: jerryzhuang <[email protected]>

.github/workflows/kind-cluster/determine_models.py

@@ -22,9 +22,14 @@ def read_yaml(file_path):
 # Format: {falcon-7b : {model_name:falcon-7b, type:text-generation, version: #, tag: #}}
 MODELS = {model['name']: model for model in YAML_PR['models']}
 KAITO_REPO_URL = "https://github.com/kaito-project/kaito.git"
+GITREMOTE_TARGET = "_ciupstream"
 
 def set_multiline_output(name, value):
-    with open(os.environ['GITHUB_OUTPUT'], 'a') as fh:
+    if not os.getenv('GITHUB_OUTPUT'):
+        print(f"Not in github env, skip writing to $GITHUB_OUTPUT .")
+        return
+
+    with open(os.getenv('GITHUB_OUTPUT'), 'a') as fh:
         delimiter = uuid.uuid1()
         print(f'{name}<<{delimiter}', file=fh)
         print(value, file=fh)
@@ -51,9 +56,11 @@ def run_command(command):
 
 def get_yaml_from_branch(branch, file_path):
     """Read YAML from a branch"""
-    subprocess.run(['git', 'fetch', 'origin', branch], check=True)
-    subprocess.run(['git', 'checkout', 'origin/' + branch], check=True)
-    return read_yaml(file_path)
+    subprocess.run(['git', 'fetch', GITREMOTE_TARGET, branch], check=True)
+    subprocess.run(['git', 'checkout', f"{GITREMOTE_TARGET}/" + branch], check=True)
+    content =  read_yaml(file_path)
+    subprocess.run(['git', 'checkout', '-'], check=True)
+    return content
 
 def detect_changes_in_yaml(yaml_main, yaml_pr): 
     """Detecting relevant changes in support_models.yaml"""
@@ -90,33 +97,27 @@ def models_to_build(files_changed):
                 seen_model_types.add(model_info["type"])
     return list(models)
 
-def check_modified_models(pr_branch):
+def check_modified_models():
     """Check for modified models in the repository."""
     repo_dir = Path.cwd() / "repo"
 
     if repo_dir.exists():
         shutil.rmtree(repo_dir)
 
-    run_command(f"git clone {KAITO_REPO_URL} {repo_dir}")
-    os.chdir(repo_dir)
-
-    run_command("git checkout --detach")
-    run_command("git fetch origin main:main")
-    run_command(f"git fetch origin {pr_branch}:{pr_branch}")
-    run_command(f"git checkout {pr_branch}")
+    run_command(f"git remote add {GITREMOTE_TARGET} {KAITO_REPO_URL}")
+    run_command(f"git fetch {GITREMOTE_TARGET}")
 
-    files = run_command("git diff --name-only origin/main") # Returns each file on newline
+    files = run_command(f"git diff --name-only {GITREMOTE_TARGET}/main") # Returns each file on newline
     files = files.split("\n")
-    os.chdir(Path.cwd().parent)
+    print("Files Changed: ", files)
 
     modified_models = models_to_build(files)
-    
+
     print("Modified Models (Images to build): ", modified_models)
 
     return modified_models
 
 def main():
-    pr_branch = os.environ.get("PR_BRANCH", "main") # If not specified default to 'main'
     force_run_all = os.environ.get("FORCE_RUN_ALL", "false") # If not specified default to False
     force_run_all_phi = os.environ.get("FORCE_RUN_ALL_PHI", "false") # If not specified default to False
     force_run_all_public = os.environ.get("FORCE_RUN_ALL_PUBLIC", "false") # If not specified default to False
@@ -131,7 +132,7 @@ def main():
     else:
         # Logic to determine affected models
         # Example: affected_models = ['model1', 'model2', 'model3']
-        affected_models = check_modified_models(pr_branch)
+        affected_models = check_modified_models()
 
     # Convert the list of models into JSON matrix format
     matrix = create_matrix(affected_models)