From 2395c403d60ee0d9ec78b7e30d4567cb08ed8ed9 Mon Sep 17 00:00:00 2001
From: Graham Christensen <graham@grahamc.com>
Date: Tue, 31 Oct 2017 04:09:41 -0400
Subject: [PATCH] split mass-rebuild and mass-rebuild-filter

---
 build-filter.php        |   3 +-
 mass-rebuild-filter.php | 130 ++++++++++++++++++++++++++++++++++++++++
 mass-rebuilder.php      | 108 ++++++++++++---------------------
 3 files changed, 170 insertions(+), 71 deletions(-)
 create mode 100644 mass-rebuild-filter.php

diff --git a/build-filter.php b/build-filter.php
index 53c18c1..569d321 100644
--- a/build-filter.php
+++ b/build-filter.php
@@ -13,8 +13,7 @@ $channel->exchange_declare('build-jobs', 'fanout', false, true, false);
 
 list($queueName, , ) = $channel->queue_declare('build-inputs',
                                                false, true, false, false);
-$channel->queue_bind($queueName, 'nixos/nixpkgs');
-$channel->queue_bind($queueName, 'grahamc/elm-stuff');
+$channel->queue_bind($queueName, 'github-events', 'issue_comment.nixos/nixpkgs');
 
 function runner($msg) {
     $in = json_decode($msg->body);
diff --git a/mass-rebuild-filter.php b/mass-rebuild-filter.php
new file mode 100644
index 0000000..69ba7f0
--- /dev/null
+++ b/mass-rebuild-filter.php
@@ -0,0 +1,130 @@
+<?php
+
+require __DIR__ . '/config.php';
+
+use PhpAmqpLib\Message\AMQPMessage;
+
+# define('AMQP_DEBUG', true);
+$connection = rabbitmq_conn();
+$channel = $connection->channel();
+$channel->basic_qos(null, 1, true);
+
+
+$channel->queue_declare('mass-rebuild-check-jobs',
+                                               false, true, false, false);
+list($queueName, , ) = $channel->queue_declare('mass-rebuild-check-inputs',
+                                               false, true, false, false);
+$channel->queue_bind($queueName, 'github-events', 'pull_request.nixos/nixpkgs');
+
+echo "hi\n";
+
+function outrunner($msg) {
+    try {
+        runner($msg);
+    } catch (\GHE\ExecException $e) {
+        var_dump($msg);
+        var_dump($e->getMessage());
+        var_dump($e->getCode());
+        var_dump($e->getOutput());
+    } catch (\PhpAmqpLib\Exception\AMQPProtocolChannelException $e) {
+        echo "Channel exception:\n";
+        var_dump($e);
+    }
+}
+
+function runner($msg) {
+    $in = json_decode($msg->body);
+
+    try {
+        $etype = \GHE\EventClassifier::classifyEvent($in);
+
+        if ($etype != "pull_request") {
+            echo "Skipping event type: $etype\n";
+            $msg->delivery_info['channel']->basic_ack($msg->delivery_info['delivery_tag']);
+            return true;
+        }
+    } catch (\GHE\EventClassifierUnknownException $e) {
+        echo "Skipping unknown event type\n";
+        print_r($in);
+        $msg->delivery_info['channel']->basic_ack($msg->delivery_info['delivery_tag']);
+        return true;
+    }
+
+    if (!\GHE\ACL::isRepoEligible($in->repository->full_name)) {
+        echo "Repo not authorized (" . $in->repository->full_name . ")\n";
+        $msg->delivery_info['channel']->basic_ack($msg->delivery_info['delivery_tag']);
+        return true;
+    }
+
+    if ($in->pull_request->state != "open") {
+        echo "PR isn't open in the event\n";
+        $msg->delivery_info['channel']->basic_ack($msg->delivery_info['delivery_tag']);
+        return true;
+    }
+
+    $client = gh_client();
+    $status = $client->api('pull_request')->show(
+        $in->repository->owner->login,
+        $in->repository->name,
+        $in->number);
+    if ($status['mergeable'] === false) {
+        echo "github says the PR isn't able to be merged\n";
+        $msg->delivery_info['channel']->basic_ack($msg->delivery_info['delivery_tag']);
+        return true;
+    }
+    if ($status['state'] !== 'open') {
+        echo "github says the PR isn't open\n";
+        $msg->delivery_info['channel']->basic_ack($msg->delivery_info['delivery_tag']);
+        return true;
+    }
+
+
+    $ok_events = [
+        'opened',
+        'created',
+        'edited',
+        'synchronize',
+        'reopened',
+    ];
+
+    if (!in_array($in->action, $ok_events)) {
+        echo "Uninteresting event " . $in->action . "\n";
+        $msg->delivery_info['channel']->basic_ack($msg->delivery_info['delivery_tag']);
+        return true;
+    }
+
+    $forward = [
+        'original_payload' => $in,
+        'repo' => [
+            'owner' => $in->repository->owner->login,
+            'name' => $in->repository->name,
+            'full_name' => $in->repository->full_name,
+            'clone_url' => $in->repository->clone_url,
+        ],
+        'pr' => [
+            'number' => $in->number,
+            'target_branch' => $in->pull_request->base->ref,
+            'patch_url' => $in->pull_request->patch_url,
+        ],
+    ];
+
+
+    echo "forwarding to mass-rebuild-check-jobs :)\n";
+
+    $message = new AMQPMessage(json_encode($forward),
+                               array(
+                                   'content_type' => 'application/json',
+                                   'delivery_mode' => AMQPMessage::DELIVERY_MODE_PERSISTENT,
+                               ));
+    $msg->delivery_info['channel']->basic_publish($message, '', 'mass-rebuild-check-jobs');
+    $msg->delivery_info['channel']->basic_ack($msg->delivery_info['delivery_tag']);
+    return true;
+}
+
+$consumerTag = 'massrebuildcheckfilter' . getmypid();
+$channel->basic_consume($queueName, $consumerTag, false, false, false, false, 'outrunner');
+while(count($channel->callbacks)) {
+    $channel->wait();
+}
+
+echo "Bye\n";
\ No newline at end of file
diff --git a/mass-rebuilder.php b/mass-rebuilder.php
index 2831dbd..86ed1f9 100644
--- a/mass-rebuilder.php
+++ b/mass-rebuilder.php
@@ -10,95 +10,65 @@ $channel = $connection->channel();
 $channel->basic_qos(null, 1, true);
 
 
-list($queueName, , ) = $channel->queue_declare('mass-rebuild-checks',
+list($queueName, , ) = $channel->queue_declare('mass-rebuild-check-jobs',
                                                false, true, false, false);
-$channel->queue_bind($queueName, 'nixos/nixpkgs');
 
 echo "hi\n";
 
 function outrunner($msg) {
     try {
-        $ret = runner($msg);
-        var_dump($ret);
-        if ($ret === true) {
-            echo "cool\n";
-            echo "acking\n";
-            $r = $msg->delivery_info['channel']->basic_ack($msg->delivery_info['delivery_tag']);
-            var_dump($r);
-            echo "acked\n";
-        } else {
-            echo "Not acking?\n";
-        }
+        runner($msg);
     } catch (\GHE\ExecException $e) {
         var_dump($msg);
         var_dump($e->getMessage());
         var_dump($e->getCode());
         var_dump($e->getOutput());
+    } catch (\PhpAmqpLib\Exception\AMQPProtocolChannelException $e) {
+        echo "Channel exception:\n";
+        var_dump($e);
     }
 }
 
 function runner($msg) {
     $in = json_decode($msg->body);
 
-    try {
-        $etype = \GHE\EventClassifier::classifyEvent($in);
-
-        if ($etype != "pull_request") {
-            echo "Skipping event type: $etype\n";
-            return true;
-        }
-    } catch (\GHE\EventClassifierUnknownException $e) {
-        echo "Skipping unknown event type\n";
-        print_r($in);
+    $client = gh_client();
+    $status = $client->api('pull_request')->show(
+        $in->repo->owner,
+        $in->repo->name,
+        $in->pr->number);
+    if ($status['mergeable'] === false) {
+        echo "github says the PR isn't able to be merged\n";
+        $msg->delivery_info['channel']->basic_ack($msg->delivery_info['delivery_tag']);
+        return true;
+    }
+    if ($status['state'] !== 'open') {
+        echo "github says the PR isn't open\n";
+        $msg->delivery_info['channel']->basic_ack($msg->delivery_info['delivery_tag']);
         return true;
     }
 
-    if (!\GHE\ACL::isRepoEligible($in->repository->full_name)) {
-        echo "Repo not authorized (" . $in->repository->full_name . ")\n";
-        return true;
-    }
-
-    if ($in->pull_request->state != "open") {
-        echo "PR isn't open\n";
-        return true;
-    }
-
-    $ok_events = [
-        'created',
-        'edited',
-        'synchronize',
-    ];
-
-    if (!in_array($in->action, $ok_events)) {
-        echo "Uninteresting event " . $in->action . "\n";
-        return true;
-    }
-
-    $r = $msg->delivery_info['channel']->basic_ack($msg->delivery_info['delivery_tag']);
-    var_dump($r);
-    echo "acked\n";
-
-
-        $against_name = "origin/" . $in->pull_request->base->ref;
-        echo "Building against $against_name\n";
-        $co = new GHE\Checkout(WORKING_DIR, "mr-est");
-    $pname = $co->checkOutRef($in->repository->full_name,
-            $in->repository->clone_url,
-            $in->number,
-            $against_name
-            );
+    $against_name = "origin/" . $in->pr->target_branch;
+    echo "Building against $against_name\n";
+    $co = new GHE\Checkout(WORKING_DIR, "mr-est");
+    $pname = $co->checkOutRef($in->repo->full_name,
+                              $in->repo->clone_url,
+                              $in->pr->number,
+                              $against_name
+    );
 
     $against = GHE\Exec::exec('git rev-parse %s', [$against_name]);
     echo " $against_name is $against[0]\n";
 
     try {
-        $co->applyPatches($pname, $in->pull_request->patch_url);
+        $co->applyPatches($pname, $in->pr->patch_url);
     } catch (GHE\ExecException $e) {
         echo "Received ExecException applying patches, likely due to conflicts:\n";
         var_dump($e->getCode());
         var_dump($e->getMessage());
         var_dump($e->getArgs());
         var_dump($e->getOutput());
+        $msg->delivery_info['channel']->basic_ack($msg->delivery_info['delivery_tag']);
         return false;
     }
 
@@ -106,19 +76,19 @@ function runner($msg) {
     echo " currently at ${current[0]}\n";
 
 
-    reply_to_issue($in, $against[0], $current[0]);
-    $msg->delivery_info['channel']->basic_cancel($msg->delivery_info['consumer_tag']);
-    return false;
+    reply_to_issue($in->repo, $in->pr, $against[0], $current[0]);
+    $msg->delivery_info['channel']->basic_ack($msg->delivery_info['delivery_tag']);
+    return true;
 }
 
-function reply_to_issue($issue, $prev, $current) {
+function reply_to_issue($repo, $pr, $prev, $current) {
     $client = gh_client();
 
     echo "current labels:\n";
     $already_there = $client->api('issue')->labels()->all(
-        $issue->repository->owner->login,
-        $issue->repository->name,
-        $issue->number);
+        $repo->owner,
+        $repo->name,
+        $pr->number);
     $already_there = array_map(function($val) { return $val['name']; }, $already_there);
     var_dump($already_there);
 
@@ -175,15 +145,15 @@ function reply_to_issue($issue, $prev, $current) {
         }
 
         $client->api('issue')->labels()->add(
-            $issue->repository->owner->login,
-            $issue->repository->name,
-            $issue->number,
+            $repo->owner,
+            $repo->name,
+            $pr->number,
             $label);
     }
 }
 
 $consumerTag = 'consumer' . getmypid();
-$channel->basic_consume($queueName, $consumerTag, false, true, false, false, 'outrunner');
+$channel->basic_consume($queueName, $consumerTag, false, false, false, false, 'outrunner');
 while(count($channel->callbacks)) {
     $channel->wait();
 }