Add skip_ci_on_push configuration option for changelog updates

docs/docs/tools/update_changelog.md

@@ -15,6 +15,7 @@ It can be invoked manually by commenting on any PR:
 
 Under the section `pr_update_changelog`, the [configuration file](https://github.com/Codium-ai/pr-agent/blob/main/pr_agent/settings/configuration.toml#L50) contains options to customize the 'update changelog' tool:
 
-- `push_changelog_changes`: whether to push the changes to CHANGELOG.md, or just print them. Default is false (print only).
-- `extra_instructions`: Optional extra instructions to the tool. For example: "focus on the changes in the file X. Ignore change in ...
+- `push_changelog_changes`: whether to push the changes to CHANGELOG.md, or just publish them as a comment. Default is false (publish as comment).
+- `extra_instructions`: Optional extra instructions to the tool. For example: "Use the following structure: ..."
 - `add_pr_link`: whether the model should try to add a link to the PR in the changelog. Default is true.
+- `skip_ci_on_push`: whether the commit message (when `push_changelog_changes` is true) will include the term "[skip ci]", preventing CI tests to be triggered on the changelog commit. Default is true.

pr_agent/settings/configuration.toml

@@ -182,6 +182,7 @@ class_name = ""        # in case there are several methods with the same name in
 push_changelog_changes=false
 extra_instructions = ""
 add_pr_link=true
+skip_ci_on_push=true
 
 [pr_analyze] # /analyze #
 enable_help_text=true

pr_agent/tools/pr_update_changelog.py

@@ -140,11 +140,15 @@ class PRUpdateChangelog:
         return new_file_content, answer
 
     def _push_changelog_update(self, new_file_content, answer):
+        if get_settings().pr_update_changelog.get("skip_ci_on_push", True):
+            commit_message = "[skip ci] Update CHANGELOG.md"
+        else:
+            commit_message = "Update CHANGELOG.md"
         self.git_provider.create_or_update_pr_file(
             file_path="CHANGELOG.md",
             branch=self.git_provider.get_pr_branch(),
             contents=new_file_content,
-            message="[skip ci] Update CHANGELOG.md",
+            message=commit_message,
         )
 
         sleep(5)  # wait for the file to be updated