fix(dependencies): only open PR if there are changes

.github/workflows/dependencies/updater.py

@@ -228,8 +228,9 @@ class Dependency:
                     self.__apply_upstream_changes()
 
                     # Add all changes and commit
-                    Git.add_and_commit(self.name, short_sha)
+                    has_new_commit = Git.add_and_commit(self.name, short_sha)
 
+                    if has_new_commit:
                         # Push changes to remote
                         Git.push(branch)
 
@@ -239,9 +240,9 @@ class Dependency:
                             f"feat({self.name}): update to version {new_version}",
                             f"""## Description
 
-Update for **{self.desc}**: update to version [{new_version}]({status['head_url']}).
+    Update for **{self.desc}**: update to version [{new_version}]({status['head_url']}).
-Check out the [list of changes]({status['compare_url']}).
+    Check out the [list of changes]({status['compare_url']}).
-""",
+    """,
                         )
 
                     # Clean up repository
@@ -377,7 +378,21 @@ class Git:
         return branch_name
 
     @staticmethod
-    def add_and_commit(scope: str, version: str):
+    def add_and_commit(scope: str, version: str) -> bool:
+        """
+        Returns `True` if there were changes and were indeed commited.
+        Returns `False` if the repo was clean and no changes were commited.
+        """
+        # check if repo is clean (clean => no error, no commit)
+        try:
+            CommandRunner.run_or_fail(
+                ["git", "diff", "--exit-code"], stage="CheckRepoClean"
+            )
+            return False
+        except CommandRunner.Exception:
+            # if it's other kind of error just throw!
+            pass
+
         user_name = os.environ.get("GIT_APP_NAME")
         user_email = os.environ.get("GIT_APP_EMAIL")
 
@@ -390,12 +405,6 @@ class Git:
         clean_env["GIT_CONFIG_GLOBAL"] = "/dev/null"
         clean_env["GIT_CONFIG_NOSYSTEM"] = "1"
 
-        # check if repo is clean (clean => no error, no commit)
-        try:
-            CommandRunner.run_or_fail(
-                ["git", "diff", "--exit-code"], stage="CheckRepoClean", env=clean_env
-            )
-        except CommandRunner.Exception:
         # Commit with settings above
         CommandRunner.run_or_fail(
             [
@@ -411,6 +420,7 @@ class Git:
             stage="CreateCommit",
             env=clean_env,
         )
+        return True
 
     @staticmethod
     def push(branch: str):