Handle base branch changed in [autolabel] and check-commits

Author: Urgau

src/github.rs

@@ -1116,6 +1116,7 @@ pub struct ChangeInner {
 pub struct Changes {
     pub title: Option<ChangeInner>,
     pub body: Option<ChangeInner>,
+    pub base: Option<ChangeInner>,
 }
 
 #[derive(PartialEq, Eq, Debug, serde::Deserialize)]

src/handlers/autolabel.rs

@@ -20,21 +20,26 @@ pub(super) async fn parse_input(
         Some(config) => config,
         None => return Ok(None),
     };
+
     // On opening a new PR or sync'ing the branch, look at the diff and try to
     // add any appropriate labels.
     //
     // FIXME: This will re-apply labels after a push that the user had tried to
     // remove. Not much can be done about that currently; the before/after on
     // synchronize may be straddling a rebase, which will break diff generation.
-    if matches!(
+    let has_state_changed = matches!(
         event.action,
         IssuesAction::Opened
             | IssuesAction::Closed
             | IssuesAction::Reopened
             | IssuesAction::Synchronize
             | IssuesAction::ReadyForReview
             | IssuesAction::ConvertedToDraft
-    ) {
+    );
+    let has_base_changed = matches!(event.action, IssuesAction::Edited)
+        && matches!(&event.changes, Some(changes) if changes.base.is_some());
+
+    if has_state_changed || has_base_changed {
         let files = event
             .issue
             .diff(&ctx.github)

src/handlers/check_commits.rs

@@ -44,13 +44,17 @@ pub(super) async fn handle(ctx: &Context, event: &Event, config: &Config) -> any
         return Ok(());
     };
 
+    let has_base_changed = matches!(event.action, IssuesAction::Edited)
+        && matches!(&event.changes, Some(changes) if changes.base.is_some());
+
     if !matches!(
         event.action,
         IssuesAction::Opened
             | IssuesAction::Reopened
             | IssuesAction::Synchronize
             | IssuesAction::ReadyForReview
-    ) || !event.issue.is_pr()
+    ) || !has_base_changed
+        || !event.issue.is_pr()
     {
         return Ok(());
     }