Batch mergeability checks on base branch pushes

src/bors/build_queue.rs

@@ -213,7 +213,7 @@ async fn maybe_timeout_build(
             BuildKind::Auto => LabelTrigger::AutoBuildFailed,
         };
         let gh_pr = repo.client.get_pull_request(pr.number).await?;
-        handle_label_trigger(repo, &gh_pr, trigger).await?;
+        handle_label_trigger(repo, &gh_pr.into(), trigger).await?;
 
         if let Err(error) = repo
             .client
@@ -348,7 +348,7 @@ async fn maybe_complete_build(
     .await?;
     if let Some(trigger) = trigger {
         let pr = repo.client.get_pull_request(pr_num).await?;
-        handle_label_trigger(repo, &pr, trigger).await?;
+        handle_label_trigger(repo, &pr.into(), trigger).await?;
     }
 
     if let Some(check_run_id) = build.check_run_id {

src/bors/handlers/autobuild.rs

@@ -38,7 +38,12 @@ pub(super) async fn command_retry(
         merge_queue_tx.notify().await?;
 
         // Retrying is essentially like a reapproval
-        handle_label_trigger(&repo_state, pr.github, LabelTrigger::Approved).await?;
+        handle_label_trigger(
+            &repo_state,
+            &pr.github.clone().into(),
+            LabelTrigger::Approved,
+        )
+        .await?;
     } else {
         let pending_auto_build = pr_model
             .auto_build

src/bors/handlers/mod.rs

@@ -28,7 +28,7 @@ use crate::bors::{
     TRY_BRANCH_NAME,
 };
 use crate::database::{DelegatedPermission, PullRequestModel};
-use crate::github::{CommitSha, GithubUser, LabelTrigger, PullRequest, PullRequestNumber};
+use crate::github::{CommitSha, GithubUser, LabelTrigger, PullRequest, PullRequestNumber, PullRequestSummary};
 use crate::permissions::PermissionType;
 use crate::{PgDbClient, TeamApiClient, load_repositories};
 use anyhow::Context;
@@ -751,7 +751,7 @@ pub async fn unapprove_pr(
     repo_state: &RepositoryState,
     db: &PgDbClient,
     pr_db: &PullRequestModel,
-    pr_gh: &PullRequest,
+    pr_gh: &PullRequestSummary,
 ) -> anyhow::Result<()> {
     db.unapprove(pr_db).await?;
     handle_label_trigger(repo_state, pr_gh, LabelTrigger::Unapproved).await?;
@@ -817,7 +817,7 @@ pub async fn invalidate_pr(
     // Step 1: unapprove the pull request if it was approved
     // This happens everytime the PR is invalidated, if it was approved before
     let pr_unapproved = if pr_db.is_approved() {
-        unapprove_pr(repo_state, db, pr_db, pr_gh).await?;
+        unapprove_pr(repo_state, db, pr_db, &pr_gh.clone().into()).await?;
         true
     } else {
         false

src/bors/handlers/pr_events.rs

@@ -16,7 +16,6 @@ use crate::bors::{AUTO_BRANCH_NAME, BorsContext, hide_tagged_comments};
 use crate::bors::{PullRequestStatus, RepositoryState};
 use crate::database::{PullRequestModel, UpsertPullRequestParams};
 use crate::github::CommitSha;
-use crate::utils::text::pluralize;
 use std::sync::Arc;
 
 pub(super) async fn handle_pull_request_edited(
@@ -243,29 +242,22 @@ pub(super) async fn handle_push_to_branch(
     mergeability_queue: &MergeabilityQueueSender,
     payload: PushToBranch,
 ) -> anyhow::Result<()> {
-    let affected_prs = db
-        .set_stale_mergeability_status_by_base_branch(repo_state.repository(), &payload.branch)
+    db.set_stale_mergeability_status_by_base_branch(repo_state.repository(), &payload.branch)
         .await?;
 
-    if !affected_prs.is_empty() {
-        tracing::info!(
-            "Adding {} {} to the mergeability queue due to a new commit pushed to base branch `{}`",
-            affected_prs.len(),
-            pluralize("PR", affected_prs.len()),
-            payload.branch
-        );
+    tracing::info!(
+        "Adding a batch to the mergeability queue due to a new commit pushed to base branch `{}`",
+        payload.branch
+    );
 
-        // Try to find an auto build that matches this SHA
-        let merged_pr = find_pr_by_merged_commit(&repo_state, &db, CommitSha(payload.sha))
-            .await
-            .ok()
-            .flatten()
-            .map(|pr| pr.number);
+    // Try to find an auto build that matches this SHA
+    let merged_pr = find_pr_by_merged_commit(&repo_state, &db, CommitSha(payload.sha))
+        .await
+        .ok()
+        .flatten()
+        .map(|pr| pr.number);
 
-        for pr in affected_prs {
-            mergeability_queue.enqueue_pr(&pr, merged_pr);
-        }
-    }
+    mergeability_queue.enqueue_batch(repo_state.repository(), &payload.branch, merged_pr);
 
     Ok(())
 }

src/bors/handlers/review.rs

@@ -133,7 +133,12 @@ pub(super) async fn command_approve(
         )
         .await?;
 
-    handle_label_trigger(&repo_state, pr.github, LabelTrigger::Approved).await
+    handle_label_trigger(
+        &repo_state,
+        &pr.github.clone().into(),
+        LabelTrigger::Approved,
+    )
+    .await
 }
 
 /// Normalize approvers (given after @bors r=) by removing leading @, possibly from multiple

src/bors/labels.rs

@@ -3,13 +3,13 @@ use std::collections::HashSet;
 use tracing::log;
 
 use crate::bors::RepositoryState;
-use crate::github::{LabelModification, LabelTrigger, PullRequest};
+use crate::github::{LabelModification, LabelTrigger, PullRequestSummary};
 
 /// If there are any label modifications that should be performed on the given PR when `trigger`
 /// happens, this function will perform them.
 pub async fn handle_label_trigger(
     repo: &RepositoryState,
-    pr: &PullRequest,
+    pr: &PullRequestSummary,
     trigger: LabelTrigger,
 ) -> anyhow::Result<()> {
     let mut add: Vec<String> = Vec::new();

src/bors/merge_queue.rs

@@ -352,7 +352,7 @@ async fn handle_start_auto_build(
             update_pr_with_known_mergeability(
                 repo,
                 &ctx.db,
-                &gh_pr,
+                &gh_pr.into(),
                 pr,
                 mergeability_sender.get_conflict_source(pr),
             )
@@ -405,7 +405,7 @@ async fn handle_start_auto_build(
                     update_pr_with_known_mergeability(
                         repo,
                         &ctx.db,
-                        &gh_pr,
+                        &gh_pr.into(),
                         pr,
                         mergeability_sender.get_conflict_source(pr),
                     )
@@ -466,7 +466,7 @@ Actual head SHA: {actual_sha}"#,
 
             // Note: we don't use invalidate_pr here, because we know that the PR is a rollup,
             // to have more control over the message.
-            unapprove_pr(repo, &ctx.db, pr, &gh_pr).await?;
+            unapprove_pr(repo, &ctx.db, pr, &gh_pr.clone().into()).await?;
 
             mismatches.sort_by_key(|mismatch| mismatch.member);