From 3a3a8ba8b773d36a0b3c8208e37928e3c6dbe696 Mon Sep 17 00:00:00 2001
From: iximeow <me@iximeow.net>
Date: Tue, 4 Jul 2023 01:52:55 -0700
Subject: pretty sure this gets host-preferential task assignment in place?

---
 src/ci_driver.rs | 68 +++++++++++++++++++++++++++++++++++---------------------
 1 file changed, 43 insertions(+), 25 deletions(-)

(limited to 'src/ci_driver.rs')

diff --git a/src/ci_driver.rs b/src/ci_driver.rs
index d8e60e5..c40e6b2 100644
--- a/src/ci_driver.rs
+++ b/src/ci_driver.rs
@@ -57,9 +57,8 @@ fn reserve_artifacts_dir(run: u64) -> std::io::Result<PathBuf> {
     }
 }
 
-async fn activate_run(dbctx: Arc<DbCtx>, run: &PendingRun, clients: &mut mpsc::Receiver<RunnerClient>) -> Result<(), String> {
+async fn activate_run(dbctx: Arc<DbCtx>, candidate: RunnerClient, job: &Job, run: &PendingRun) -> Result<(), String> {
     eprintln!("activating task {:?}", run);
-    let job = dbctx.job_by_id(run.job_id).expect("can query").expect("job exists");
 
     let connection = dbctx.conn.lock().unwrap();
 
@@ -84,28 +83,16 @@ async fn activate_run(dbctx: Arc<DbCtx>, run: &PendingRun, clients: &mut mpsc::R
 
     eprintln!("running {}", repo_name);
 
-    let mut client_job = loop {
-        let mut candidate = clients.recv().await
-            .ok_or_else(|| "client channel disconnected".to_string())?;
+    let res = candidate.submit(&dbctx, &run, &remote_git_url, &commit_sha).await;
 
-        if !candidate.will_accept(&job) {
-            eprintln!("client {:?} would not accept job {:?}", candidate, job);
-            continue;
+    let mut client_job = match res {
+        Ok(Some(mut client_job)) => { client_job }
+        Ok(None) => {
+            return Err("client hung up instead of acking task".to_string());
         }
-
-        let res = candidate.submit(&dbctx, &run, &remote_git_url, &commit_sha).await;
-
-        match res {
-            Ok(Some(mut client_job)) => {
-                break client_job;
-            }
-            Ok(None) => {
-                eprintln!("client hung up instead of acking task");
-            }
-            Err(e) => {
-                // failed to submit job, move on for now
-                eprintln!("failed to submit task: {:?}", e);
-            }
+        Err(e) => {
+            // failed to submit job, move on for now
+            return Err(format!("failed to submit task: {:?}", e));
         }
     };
 
@@ -521,16 +508,47 @@ async fn main() {
 
     spawn(old_task_reaper(Arc::clone(&dbctx)));
 
-    loop {
-        let runs = dbctx.get_pending_runs().unwrap();
+    'accept: loop {
+        let mut candidate = match channel.recv().await
+            .ok_or_else(|| "client channel disconnected".to_string()) {
+
+            Ok(candidate) => { candidate },
+            Err(e) => { eprintln!("client error: {}", e); continue; }
+        };
+
+        // try to find a job for this candidate:
+        // * start with pending runs - these need *some* client to run them, but do not care which
+        // * if no new jobs, maybe an existing job still needs a rerun on this client?
+        // * otherwise, um, i dunno. do nothing?
+
+        let runs = dbctx.get_pending_runs(Some(candidate.host_id)).unwrap();
 
         if runs.len() > 0 {
             println!("{} new runs", runs.len());
 
             for run in runs.into_iter() {
-                activate_run(Arc::clone(&dbctx), &run, &mut channel).await;
+                let job = dbctx.job_by_id(run.job_id).expect("can query").expect("job exists");
+
+                if candidate.will_accept(&job) {
+                    eprintln!("client {:?} would not accept job {:?}", candidate, job);
+                    activate_run(Arc::clone(&dbctx), candidate, &job, &run).await;
+                    continue 'accept;
+                }
+
             }
         }
+
+        let alt_run_jobs = dbctx.jobs_needing_task_runs_for_host(candidate.host_id as u64).expect("can query");
+
+        for job in alt_run_jobs.iter() {
+            if candidate.will_accept(&job) {
+                let run = dbctx.new_run(job.id, Some(candidate.host_id)).unwrap();
+                eprintln!("enqueueing job {} for alternate run under host id {}", job.id, candidate.host_id);
+                activate_run(Arc::clone(&dbctx), candidate, &job, &run).await;
+                continue 'accept;
+            }
+        }
+
         tokio::time::sleep(std::time::Duration::from_millis(100)).await;
     }
 }
-- 
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