commit 0c7b2f252ecd21a415eb9952652ea6857b4d40b6
Author: Graham Christensen <graham@grahamc.com>
Date:   Sun Oct 29 17:10:26 2017 -0400

    Initial port from my network

diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..0139c4a
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,4 @@
+config.php
+vendor
+*.log
+test.php
diff --git a/README.md b/README.md
new file mode 100644
index 0000000..7ef40d0
--- /dev/null
+++ b/README.md
@@ -0,0 +1,57 @@
+# grahamcofborg
+
+1. All github events go in to web/index.php, which sends the event to
+   an exchange named for the full name of the repo (ex: nixos/nixpkgs)
+   in lower case. The exchange is set to "fanout"
+2. build-filter.php creates a queue called build-inputs and binds it
+   to the nixos/nixpkgs exchange. It also creates an exchange,
+   build-jobs, set to fan out. It listens for messages on the
+   build-inputs queue. Issue comments from authorized users on
+   PRs get tokenized and turned in to build instructions. These jobs
+   are then written to the build-jobs exchange.
+3. builder.php creates a queue called `build-inputs-x86_64-linux`, and
+   binds it to the build-jobs exchange. It then listens for build
+   instructions on the `build-inputs-x86_64-linux` queue. For each
+   job, it uses nix-build to run the build instructions. The status
+   result (pass/fail) and the last ten lines of output are then placed
+   in to the `build-results` queue.
+4. poster.php declares the build-results queue, and listens for
+   messages on it. It posts the build status and text output on the PR
+   the build is from.
+
+
+The conspicuously missing config.php looks like:
+
+```php
+<?php
+
+require_once __DIR__ . '/vendor/autoload.php';
+use PhpAmqpLib\Connection\AMQPSSLConnection;
+use PhpAmqpLib\Message\AMQPMessage;
+
+function rabbitmq_conn() {
+    $connection = new AMQPSSLConnection(
+        'events.nix.gsc.io', 5671,
+        eventsuser, eventspasswordd, '/', array(
+            'verify_peer' => true,
+            'verify_peer_name' => true,
+            'peer_name' => 'events.nix.gsc.io',
+            'verify_depth' => 10,
+            'ca_file' => '/etc/ssl/certs/ca-certificates.crt'
+        )
+    );
+
+    return $connection;
+}
+
+function gh_client() {
+    $client = new \Github\Client();
+    $client->authenticate('githubusername',
+                          'githubpassword',
+                          Github\Client::AUTH_HTTP_PASSWORD);
+
+    return $client;
+
+
+}
+```
diff --git a/build-filter.php b/build-filter.php
new file mode 100644
index 0000000..b4316ad
--- /dev/null
+++ b/build-filter.php
@@ -0,0 +1,118 @@
+<?php
+
+require __DIR__ . '/config.php';
+use PhpAmqpLib\Message\AMQPMessage;
+
+# define('AMQP_DEBUG', true);
+$connection = rabbitmq_conn();
+$channel = $connection->channel();
+$channel->basic_qos(null, 1, true);
+
+$channel->exchange_declare('build-jobs', 'fanout', false, true, false);
+
+
+list($queueName, , ) = $channel->queue_declare('build-inputs',
+                                               false, true, false, false);
+$channel->queue_bind($queueName, 'nixos/nixpkgs');
+$channel->queue_bind($queueName, 'grahamc/elm-stuff');
+
+function runner($msg) {
+    $in = json_decode($msg->body);
+
+    try {
+        $etype = \GHE\EventClassifier::classifyEvent($in);
+
+        if ($etype != "issue_comment") {
+            echo "Skipping event type: $etype\n";
+            return true;
+        }
+    } catch (\GHE\EventClassifierUnknownException $e) {
+        echo "Skipping unknown event type\n";
+        print_r($in);
+        return true;
+    }
+
+    if (!\GHE\ACL::isUserAuthorized($in->comment->user->login)) {
+        echo "Commenter not authorized (" . $in->comment->user->login . ")\n";
+        return true;
+    }
+
+    if (!\GHE\ACL::isRepoEligible($in->repository->full_name)) {
+        echo "Repo not authorized (" . $in->repository->full_name . ")\n";
+        return true;
+    }
+
+    if (!isset($in->issue->pull_request)) {
+        echo "not a PR\n";
+        return true;
+    }
+
+    # // We don't get a useful pull_request here, we'd have to fetch it
+    # to know if it is open
+    #if ($in->issue->pull_request->state != "open") {
+    #    var_dump($in->issue->pull_request);
+    #    echo "PR isn't open\n";
+    #    return true;
+    # }
+
+    $cmt = explode(' ', strtolower($in->comment->body));
+    if (!in_array('@grahamcofborg', $cmt)) {
+        echo "not a borgpr\n";
+        return true;
+    }
+
+    $cmt = explode(' ', $in->comment->body);
+
+    $tokens = array_map(function($term) { return trim($term); },
+                     array_filter($cmt,
+                                  function($term) {
+                                      return !in_array(strtolower($term), [
+                                          "@grahamcofborg",
+                                          "",
+                                      ]);
+                                  }
+                     )
+    );
+
+    if (count($tokens) == 1 && implode("", $tokens) == "default") {
+        echo "default support is blocked\n";
+        return true;
+        $forward = [
+            'payload' => $in,
+            'build_default' => true,
+            'attrs' => [],
+        ];
+    } else {
+        $forward = [
+            'payload' => $in,
+            'build_default' => false,
+            'attrs' => $tokens,
+        ];
+    }
+
+    echo "forwarding to build-jobs :)\n";
+
+    $message = new AMQPMessage(json_encode($forward),
+                               array('content_type' => 'application/json'));
+    $msg->delivery_info['channel']->basic_publish($message, 'build-jobs');
+    return true;
+}
+
+
+function outrunner($msg) {
+    try {
+        if (runner($msg) === true) {
+            $msg->delivery_info['channel']->basic_ack($msg->delivery_info['delivery_tag']);
+        }
+    } catch (\GHE\ExecException $e) {
+        var_dump($e->getMessage());
+        var_dump($e->getCode());
+        var_dump($e->getOutput());
+    }
+}
+
+$consumerTag = 'consumer' . getmypid();
+$channel->basic_consume($queueName, $consumerTag, false, false, false, false, 'outrunner');
+while(count($channel->callbacks)) {
+    $channel->wait();
+}
diff --git a/builder.php b/builder.php
new file mode 100644
index 0000000..81b8020
--- /dev/null
+++ b/builder.php
@@ -0,0 +1,107 @@
+<?php
+
+require __DIR__ . '/config.php';
+use PhpAmqpLib\Message\AMQPMessage;
+
+# define('AMQP_DEBUG', true);
+$connection = rabbitmq_conn();
+$channel = $connection->channel();
+$channel->basic_qos(null, 1, true);
+
+list($queueName, , ) = $channel->queue_declare('build-results',
+                                               false, true, false, false);
+
+list($queueName, , ) = $channel->queue_declare('build-inputs-x86_64-linux',
+                                               false, true, false, false);
+$channel->queue_bind($queueName, 'build-jobs');
+
+
+function runner($msg) {
+    echo "got a job!\n";
+    $body = json_decode($msg->body);
+    $in = $body->payload;
+
+    $co = new GHE\Checkout("/home/grahamc/.nix-test", "builder");
+    $pname = $co->checkOutRef($in->repository->full_name,
+                              $in->repository->clone_url,
+                              $in->issue->number,
+                              "origin/master"
+    );
+
+    $patch_url = $in->issue->pull_request->patch_url;
+    echo "Building $patch_url\n";
+    $co->applyPatches($pname, $patch_url);
+
+    if ($body->build_default) {
+        echo "building via nix-build .\n";
+
+        $cmd = 'NIX_PATH=nixpkgs=%s nix-build --option restrict-eval true --keep-going .';
+        $args = [$pname];
+    } else {
+        echo "building via nix-build . -A\n";
+        $attrs = array_intersperse(array_values((array)$body->attrs), '-A');
+        var_dump($attrs);
+
+        $fillers = implode(" ", array_fill(0, count($attrs), '%s'));
+
+        $cmd = 'NIX_PATH=nixpkgs=%s nix-build --option restrict-eval true --keep-going . ' . $fillers;
+        $args = $attrs;
+        array_unshift($args, $pname);
+    }
+
+    try {
+        $output = GHE\Exec::exec($cmd, $args);
+        $pass = true;
+    } catch (GHE\ExecException $e) {
+        $output = $e->getOutput();
+        $pass = false;
+    }
+
+    $lastlines = array_reverse(
+        array_slice(
+            array_reverse($output),
+            0, 10
+        )
+    );
+
+    $forward = [
+        'payload' => $in,
+        'output' => $lastlines,
+        'success' => $pass,
+    ];
+
+    $message = new AMQPMessage(json_encode($forward),
+                               array('content_type' => 'application/json'));
+    $msg->delivery_info['channel']->basic_publish($message, '', 'build-results');
+    $msg->delivery_info['channel']->basic_ack($msg->delivery_info['delivery_tag']);
+
+    echo "finished\n";
+}
+
+function array_intersperse($array, $val) {
+    return array_reduce($array,
+                        function($c, $elem) use ($val) {
+                            $c[] = $val;
+                            $c[] = $elem;
+                            return $c;
+                        },
+                        array());
+}
+
+
+function outrunner($msg) {
+    try {
+        return runner($msg);
+    } catch (ExecException $e) {
+        var_dump($e->getMessage());
+        var_dump($e->getCode());
+        var_dump($e->getOutput());
+    }
+}
+
+
+$consumerTag = 'consumer' . getmypid();
+$channel->basic_consume($queueName, $consumerTag, false, false, false, false, 'outrunner');
+while(count($channel->callbacks)) {
+    $channel->wait();
+}
diff --git a/composer.json b/composer.json
new file mode 100644
index 0000000..2c7424a
--- /dev/null
+++ b/composer.json
@@ -0,0 +1,14 @@
+{
+    "require": {
+        "php-amqplib/php-amqplib": ">=2.6.1",
+        "knplabs/github-api": "^2.6@dev",
+        "php-http/guzzle6-adapter": "^1.2@dev"
+    },
+    "minimum-stability": "dev",
+    "autoload": {
+        "psr-4": {"GHE\\": "src/"}
+    },
+    "require-dev": {
+        "phpunit/phpunit": "^6.4"
+    }
+}
diff --git a/composer.lock b/composer.lock
new file mode 100644
index 0000000..df5b6ee
--- /dev/null
+++ b/composer.lock
@@ -0,0 +1,2461 @@
+{
+    "_readme": [
+        "This file locks the dependencies of your project to a known state",
+        "Read more about it at https://getcomposer.org/doc/01-basic-usage.md#composer-lock-the-lock-file",
+        "This file is @generated automatically"
+    ],
+    "content-hash": "5ac078c9602fc65993891726f1216093",
+    "packages": [
+        {
+            "name": "clue/stream-filter",
+            "version": "v1.4.0",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/clue/php-stream-filter.git",
+                "reference": "d80fdee9b3a7e0d16fc330a22f41f3ad0eeb09d0"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/clue/php-stream-filter/zipball/d80fdee9b3a7e0d16fc330a22f41f3ad0eeb09d0",
+                "reference": "d80fdee9b3a7e0d16fc330a22f41f3ad0eeb09d0",
+                "shasum": ""
+            },
+            "require": {
+                "php": ">=5.3"
+            },
+            "require-dev": {
+                "phpunit/phpunit": "^5.0 || ^4.8"
+            },
+            "type": "library",
+            "autoload": {
+                "psr-4": {
+                    "Clue\\StreamFilter\\": "src/"
+                },
+                "files": [
+                    "src/functions.php"
+                ]
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "MIT"
+            ],
+            "authors": [
+                {
+                    "name": "Christian Lück",
+                    "email": "christian@lueck.tv"
+                }
+            ],
+            "description": "A simple and modern approach to stream filtering in PHP",
+            "homepage": "https://github.com/clue/php-stream-filter",
+            "keywords": [
+                "bucket brigade",
+                "callback",
+                "filter",
+                "php_user_filter",
+                "stream",
+                "stream_filter_append",
+                "stream_filter_register"
+            ],
+            "time": "2017-08-18T09:54:01+00:00"
+        },
+        {
+            "name": "guzzlehttp/guzzle",
+            "version": "6.3.0",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/guzzle/guzzle.git",
+                "reference": "f4db5a78a5ea468d4831de7f0bf9d9415e348699"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/guzzle/guzzle/zipball/f4db5a78a5ea468d4831de7f0bf9d9415e348699",
+                "reference": "f4db5a78a5ea468d4831de7f0bf9d9415e348699",
+                "shasum": ""
+            },
+            "require": {
+                "guzzlehttp/promises": "^1.0",
+                "guzzlehttp/psr7": "^1.4",
+                "php": ">=5.5"
+            },
+            "require-dev": {
+                "ext-curl": "*",
+                "phpunit/phpunit": "^4.0 || ^5.0",
+                "psr/log": "^1.0"
+            },
+            "suggest": {
+                "psr/log": "Required for using the Log middleware"
+            },
+            "type": "library",
+            "extra": {
+                "branch-alias": {
+                    "dev-master": "6.2-dev"
+                }
+            },
+            "autoload": {
+                "files": [
+                    "src/functions_include.php"
+                ],
+                "psr-4": {
+                    "GuzzleHttp\\": "src/"
+                }
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "MIT"
+            ],
+            "authors": [
+                {
+                    "name": "Michael Dowling",
+                    "email": "mtdowling@gmail.com",
+                    "homepage": "https://github.com/mtdowling"
+                }
+            ],
+            "description": "Guzzle is a PHP HTTP client library",
+            "homepage": "http://guzzlephp.org/",
+            "keywords": [
+                "client",
+                "curl",
+                "framework",
+                "http",
+                "http client",
+                "rest",
+                "web service"
+            ],
+            "time": "2017-06-22T18:50:49+00:00"
+        },
+        {
+            "name": "guzzlehttp/promises",
+            "version": "dev-master",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/guzzle/promises.git",
+                "reference": "e9cdab6ff93ff789b5b599326c727f51d10893a6"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/guzzle/promises/zipball/e9cdab6ff93ff789b5b599326c727f51d10893a6",
+                "reference": "e9cdab6ff93ff789b5b599326c727f51d10893a6",
+                "shasum": ""
+            },
+            "require": {
+                "php": ">=5.5.0"
+            },
+            "require-dev": {
+                "phpunit/phpunit": "^4.8.36"
+            },
+            "type": "library",
+            "extra": {
+                "branch-alias": {
+                    "dev-master": "1.4-dev"
+                }
+            },
+            "autoload": {
+                "psr-4": {
+                    "GuzzleHttp\\Promise\\": "src/"
+                },
+                "files": [
+                    "src/functions_include.php"
+                ]
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "MIT"
+            ],
+            "authors": [
+                {
+                    "name": "Michael Dowling",
+                    "email": "mtdowling@gmail.com",
+                    "homepage": "https://github.com/mtdowling"
+                }
+            ],
+            "description": "Guzzle promises library",
+            "keywords": [
+                "promise"
+            ],
+            "time": "2017-10-06T12:25:00+00:00"
+        },
+        {
+            "name": "guzzlehttp/psr7",
+            "version": "dev-master",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/guzzle/psr7.git",
+                "reference": "d2537c86fa8b004c29e9b9f5e10028f0a29df101"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/guzzle/psr7/zipball/d2537c86fa8b004c29e9b9f5e10028f0a29df101",
+                "reference": "d2537c86fa8b004c29e9b9f5e10028f0a29df101",
+                "shasum": ""
+            },
+            "require": {
+                "php": ">=5.4.0",
+                "psr/http-message": "~1.0"
+            },
+            "provide": {
+                "psr/http-message-implementation": "1.0"
+            },
+            "require-dev": {
+                "phpunit/phpunit": "~4.0"
+            },
+            "type": "library",
+            "extra": {
+                "branch-alias": {
+                    "dev-master": "1.4-dev"
+                }
+            },
+            "autoload": {
+                "psr-4": {
+                    "GuzzleHttp\\Psr7\\": "src/"
+                },
+                "files": [
+                    "src/functions_include.php"
+                ]
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "MIT"
+            ],
+            "authors": [
+                {
+                    "name": "Michael Dowling",
+                    "email": "mtdowling@gmail.com",
+                    "homepage": "https://github.com/mtdowling"
+                },
+                {
+                    "name": "Tobias Schultze",
+                    "homepage": "https://github.com/Tobion"
+                }
+            ],
+            "description": "PSR-7 message implementation that also provides common utility methods",
+            "keywords": [
+                "http",
+                "message",
+                "request",
+                "response",
+                "stream",
+                "uri",
+                "url"
+            ],
+            "time": "2017-10-07T03:19:56+00:00"
+        },
+        {
+            "name": "knplabs/github-api",
+            "version": "dev-master",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/KnpLabs/php-github-api.git",
+                "reference": "13003af4d8f5abf8e55a8ad38a4eea4dfed5a513"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/KnpLabs/php-github-api/zipball/13003af4d8f5abf8e55a8ad38a4eea4dfed5a513",
+                "reference": "13003af4d8f5abf8e55a8ad38a4eea4dfed5a513",
+                "shasum": ""
+            },
+            "require": {
+                "php": "^5.5 || ^7.0",
+                "php-http/cache-plugin": "^1.4",
+                "php-http/client-common": "^1.3",
+                "php-http/client-implementation": "^1.0",
+                "php-http/discovery": "^1.0",
+                "php-http/httplug": "^1.1",
+                "psr/cache": "^1.0",
+                "psr/http-message": "^1.0"
+            },
+            "require-dev": {
+                "cache/array-adapter": "^0.4",
+                "guzzlehttp/psr7": "^1.2",
+                "php-http/guzzle6-adapter": "^1.0",
+                "php-http/mock-client": "^1.0",
+                "phpunit/phpunit": "^4.0 || ^5.5",
+                "sllh/php-cs-fixer-styleci-bridge": "^1.3"
+            },
+            "type": "library",
+            "extra": {
+                "branch-alias": {
+                    "dev-master": "2.6.x-dev"
+                }
+            },
+            "autoload": {
+                "psr-4": {
+                    "Github\\": "lib/Github/"
+                }
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "MIT"
+            ],
+            "authors": [
+                {
+                    "name": "Thibault Duplessis",
+                    "email": "thibault.duplessis@gmail.com",
+                    "homepage": "http://ornicar.github.com"
+                },
+                {
+                    "name": "KnpLabs Team",
+                    "homepage": "http://knplabs.com"
+                }
+            ],
+            "description": "GitHub API v3 client",
+            "homepage": "https://github.com/KnpLabs/php-github-api",
+            "keywords": [
+                "api",
+                "gh",
+                "gist",
+                "github"
+            ],
+            "time": "2017-10-13T06:47:44+00:00"
+        },
+        {
+            "name": "php-amqplib/php-amqplib",
+            "version": "v2.7.0",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/php-amqplib/php-amqplib.git",
+                "reference": "f48748546e398d846134c594dfca9070c4c3b356"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/php-amqplib/php-amqplib/zipball/f48748546e398d846134c594dfca9070c4c3b356",
+                "reference": "f48748546e398d846134c594dfca9070c4c3b356",
+                "shasum": ""
+            },
+            "require": {
+                "ext-bcmath": "*",
+                "ext-mbstring": "*",
+                "php": ">=5.3.0"
+            },
+            "replace": {
+                "videlalvaro/php-amqplib": "self.version"
+            },
+            "require-dev": {
+                "phpunit/phpunit": "^4.8",
+                "scrutinizer/ocular": "^1.1",
+                "squizlabs/php_codesniffer": "^2.5"
+            },
+            "suggest": {
+                "ext-sockets": "Use AMQPSocketConnection"
+            },
+            "type": "library",
+            "extra": {
+                "branch-alias": {
+                    "dev-master": "2.7-dev"
+                }
+            },
+            "autoload": {
+                "psr-4": {
+                    "PhpAmqpLib\\": "PhpAmqpLib/"
+                }
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "LGPL-2.1"
+            ],
+            "authors": [
+                {
+                    "name": "Alvaro Videla",
+                    "role": "Original Maintainer"
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+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "BSD-3-Clause"
+            ],
+            "authors": [
+                {
+                    "name": "Sebastian Bergmann",
+                    "email": "sebastian@phpunit.de",
+                    "role": "lead"
+                }
+            ],
+            "description": "Library that helps with managing the version number of Git-hosted PHP projects",
+            "homepage": "https://github.com/sebastianbergmann/version",
+            "time": "2016-10-03T07:35:21+00:00"
+        },
+        {
+            "name": "theseer/tokenizer",
+            "version": "1.1.0",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/theseer/tokenizer.git",
+                "reference": "cb2f008f3f05af2893a87208fe6a6c4985483f8b"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/theseer/tokenizer/zipball/cb2f008f3f05af2893a87208fe6a6c4985483f8b",
+                "reference": "cb2f008f3f05af2893a87208fe6a6c4985483f8b",
+                "shasum": ""
+            },
+            "require": {
+                "ext-dom": "*",
+                "ext-tokenizer": "*",
+                "ext-xmlwriter": "*",
+                "php": "^7.0"
+            },
+            "type": "library",
+            "autoload": {
+                "classmap": [
+                    "src/"
+                ]
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "BSD-3-Clause"
+            ],
+            "authors": [
+                {
+                    "name": "Arne Blankerts",
+                    "email": "arne@blankerts.de",
+                    "role": "Developer"
+                }
+            ],
+            "description": "A small library for converting tokenized PHP source code into XML and potentially other formats",
+            "time": "2017-04-07T12:08:54+00:00"
+        },
+        {
+            "name": "webmozart/assert",
+            "version": "dev-master",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/webmozart/assert.git",
+                "reference": "4a8bf11547e139e77b651365113fc12850c43d9a"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/webmozart/assert/zipball/4a8bf11547e139e77b651365113fc12850c43d9a",
+                "reference": "4a8bf11547e139e77b651365113fc12850c43d9a",
+                "shasum": ""
+            },
+            "require": {
+                "php": "^5.3.3 || ^7.0"
+            },
+            "require-dev": {
+                "phpunit/phpunit": "^4.6",
+                "sebastian/version": "^1.0.1"
+            },
+            "type": "library",
+            "extra": {
+                "branch-alias": {
+                    "dev-master": "1.3-dev"
+                }
+            },
+            "autoload": {
+                "psr-4": {
+                    "Webmozart\\Assert\\": "src/"
+                }
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "MIT"
+            ],
+            "authors": [
+                {
+                    "name": "Bernhard Schussek",
+                    "email": "bschussek@gmail.com"
+                }
+            ],
+            "description": "Assertions to validate method input/output with nice error messages.",
+            "keywords": [
+                "assert",
+                "check",
+                "validate"
+            ],
+            "time": "2016-11-23T20:04:41+00:00"
+        }
+    ],
+    "aliases": [],
+    "minimum-stability": "dev",
+    "stability-flags": {
+        "knplabs/github-api": 20,
+        "php-http/guzzle6-adapter": 20
+    },
+    "prefer-stable": false,
+    "prefer-lowest": false,
+    "platform": [],
+    "platform-dev": []
+}
diff --git a/mass-rebuilder.php b/mass-rebuilder.php
new file mode 100644
index 0000000..9be08ff
--- /dev/null
+++ b/mass-rebuilder.php
@@ -0,0 +1,191 @@
+<?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);
+
+
+list($queueName, , ) = $channel->queue_declare('mass-rebuild-checks',
+                                               false, true, false, false);
+$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";
+        }
+    } catch (\GHE\ExecException $e) {
+        var_dump($msg);
+        var_dump($e->getMessage());
+        var_dump($e->getCode());
+        var_dump($e->getOutput());
+    }
+}
+
+function runner($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);
+        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("/home/grahamc/.nix-test", "mr-est");
+    $pname = $co->checkOutRef($in->repository->full_name,
+            $in->repository->clone_url,
+            $in->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);
+    } 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());
+        return false;
+    }
+
+    $current = GHE\Exec::exec('git rev-parse HEAD');
+    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;
+}
+
+function reply_to_issue($issue, $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);
+    $already_there = array_map(function($val) { return $val['name']; }, $already_there);
+    var_dump($already_there);
+
+    $output = GHE\Exec::exec('$(nix-instantiate --eval -E %s) %s %s',
+                             [
+                                 '<nixpkgs/maintainers/scripts/rebuild-amount.sh>',
+                                 $prev,
+                                 $current
+                             ]
+    );
+
+    $labels = [];
+    foreach ($output as $line) {
+        if (preg_match('/^\s*(\d+) (.*)$/', $line, $matches)) {
+            var_dump($matches);
+            # TODO: separate out the rebuild ranges from the rebuild platform and
+            # splice the string together, rather than this ugliness
+            if ($matches[1] > 500) {
+                if ($matches[2] == "x86_64-darwin") {
+                    $labels[] = "10.rebuild-darwin: 501+";
+                } else {
+                    $labels[] = "10.rebuild-linux: 501+";
+                }
+            } else if ($matches[1] > 100 && $matches[1] <= 500) {
+                if ($matches[2] == "x86_64-darwin") {
+                    $labels[] = "10.rebuild-darwin: 101-500";
+                } else {
+                    $labels[] = "10.rebuild-linux: 101-500";
+                }
+            } else if ($matches[1] > 10 && $matches[1] <= 100) {
+                if ($matches[2] == "x86_64-darwin") {
+                    $labels[] = "10.rebuild-darwin: 11-100";
+                } else {
+                    $labels[] = "10.rebuild-linux: 11-100";
+                }
+            } else if ($matches[1] <= 10) {
+                if ($matches[2] == "x86_64-darwin") {
+                    $labels[] = "10.rebuild-darwin: 1-10";
+                } else {
+                    $labels[] = "10.rebuild-linux: 1-10";
+                }
+            }
+        }
+    }
+
+
+    foreach ($labels as $label) {
+        if (in_array($label, $already_there)) {
+            echo "already labeled $label\n";
+
+            continue;
+        } else {
+            echo "will label +$label\n";
+        }
+
+        $client->api('issue')->labels()->add(
+            $issue->repository->owner->login,
+            $issue->repository->name,
+            $issue->number,
+            $label);
+    }
+}
+
+$consumerTag = 'consumer' . getmypid();
+$channel->basic_consume($queueName, $consumerTag, false, true, false, false, 'outrunner');
+while(count($channel->callbacks)) {
+    $channel->wait();
+}
+
+echo "Bye\n";
\ No newline at end of file
diff --git a/poster.php b/poster.php
new file mode 100644
index 0000000..d2a5ad0
--- /dev/null
+++ b/poster.php
@@ -0,0 +1,68 @@
+<?php
+
+require __DIR__ . '/config.php';
+use PhpAmqpLib\Message\AMQPMessage;
+
+# define('AMQP_DEBUG', true);
+$connection = rabbitmq_conn();
+$channel = $connection->channel();
+$channel->basic_qos(null, 1, true);
+
+list($queueName, , ) = $channel->queue_declare('build-results',
+                                               false, true, false, false);
+
+function runner($msg) {
+    $body = json_decode($msg->body);
+    $in = $body->payload;
+
+    $num = $in->issue->number;
+    if ($body->success) {
+        echo "yay! $num passed!\n";
+    } else {
+        echo "Yikes, $num failede\n";
+    }
+
+    reply_to_issue($in, implode("\n", $body->output), $body->success);
+
+    var_dump($body->success);
+
+    $msg->delivery_info['channel']->basic_ack($msg->delivery_info['delivery_tag']);
+}
+
+function reply_to_issue($issue, $output, $success) {
+    $client = gh_client();
+    $pr = $client->api('pull_request')->show(
+        $issue->repository->owner->login,
+        $issue->repository->name,
+        $issue->issue->number
+    );
+    $sha = $pr['head']['sha'];
+
+    $client->api('pull_request')->reviews()->create(
+        $issue->repository->owner->login,
+        $issue->repository->name,
+        $issue->issue->number,
+        array(
+            'body' => "```\n$output\n```",
+            'event' => $success ? 'APPROVE' : 'COMMENT',
+            'commit_id' => $sha,
+        ));
+}
+
+
+function outrunner($msg) {
+    try {
+        return runner($msg);
+    } catch (ExecException $e) {
+        var_dump($e->getMessage());
+        var_dump($e->getCode());
+        var_dump($e->getOutput());
+    }
+}
+
+
+$consumerTag = 'consumer' . getmypid();
+$channel->basic_consume($queueName, $consumerTag, false, false, false, false, 'outrunner');
+while(count($channel->callbacks)) {
+    $channel->wait();
+}
diff --git a/shell.nix b/shell.nix
new file mode 100644
index 0000000..e62a00b
--- /dev/null
+++ b/shell.nix
@@ -0,0 +1,15 @@
+let
+  pkgs = import <nixpkgs> {};
+
+  inherit (pkgs) stdenv;
+
+in stdenv.mkDerivation rec {
+  name = "gh-event-forwarder";
+  src = ./.;
+  buildInputs = with pkgs; [
+    php
+    phpPackages.composer
+  ];
+
+  HISTFILE = "${src}/.bash_hist";
+}
diff --git a/src/ACL.php b/src/ACL.php
new file mode 100644
index 0000000..1f3cc49
--- /dev/null
+++ b/src/ACL.php
@@ -0,0 +1,37 @@
+<?php
+namespace GHE;
+
+class ACL {
+    static public function getRepos() {
+        return [
+            'grahamc/elm-stuff',
+            'nixos/nixpkgs',
+        ];
+    }
+
+    static public function getUsers() {
+        return [
+            'copumpkin',
+            'domenkozar',
+            'fpletz',
+            'fridh',
+            'globin',
+            'grahamc',
+            'lnl7',
+            'mic92',
+            'shlevy',
+        ];
+    }
+
+    static public function isRepoEligible($repo) {
+        return in_array(strtolower($repo), self::getRepos());
+    }
+
+    static public function isUserAuthorized($user) {
+        return in_array(strtolower($user), self::getUsers());
+    }
+
+    static public function authorizeUserRepo($user, $repo) {
+        return self::isRepoEligible($repo) && self::isUserAuthorized($user);
+    }
+}
\ No newline at end of file
diff --git a/src/Checkout.php b/src/Checkout.php
new file mode 100644
index 0000000..12e36d0
--- /dev/null
+++ b/src/Checkout.php
@@ -0,0 +1,117 @@
+<?php
+
+namespace GHE;
+
+class Checkout {
+
+    protected $root;
+    protected $type;
+
+    function __construct($root, $type) {
+        $this->root = $root;
+        $this->type = $type;
+    }
+
+    function checkOutRef($repo_name, $clone_url, $id, $ref) {
+        $this->prefetchRepoCache($repo_name, $clone_url);
+
+        $pname = $this->pathToRepoCache($repo_name);
+        $bname = $this->pathToBuildDir($repo_name, $id);
+
+        $guard = $this->guard($bname);
+        if (!is_dir($bname)) {
+            echo "Cloning " . $id . " to $bname\n";
+            Exec::exec('git clone --reference-if-able %s %s %s',
+                       [
+                           $pname,
+                           $clone_url,
+                           $bname
+                       ]);
+        }
+
+        if (!chdir($bname)) {
+            throw new CoFailedException("Failed to chdir to $bname\n");
+        }
+
+        echo "fetching " . $id . " in $bname\n";
+        Exec::exec('git fetch origin');
+        try {
+            Exec::exec('git am --abort');
+        } catch (ExecException $e) {
+            // non-zero exit if no am is in progress
+        }
+        Exec::exec('git reset --hard %s', [$ref]);
+
+
+        $this->release($guard);
+
+        return $bname;
+    }
+
+    function applyPatches($bname, $patch_url) {
+        if (!chdir($bname)) {
+            throw new CoFailedException("Failed to chdir to $bname\n");
+        }
+
+        $guard = $this->guard($pname);
+        Exec::exec('curl -L %s | git am --no-gpg-sign -', [$patch_url]);
+        $this->release($guard);
+    }
+
+    function prefetchRepoCache($name, $clone_url) {
+        if (!chdir($this->root)) {
+            throw new CoFailedException("Failed to chdir to " . $this->root);
+        }
+
+        $pname = $this->pathToRepoCache($name);
+
+        $guard = $this->guard($pname);
+
+        if (!is_dir($pname)) {
+            echo "Cloning " . $name . " to $pname\n";
+            Exec::exec('git clone --bare %s %s',
+                       [
+                           $clone_url,
+                           $pname
+                       ]);
+        }
+
+        $this->release($guard);
+
+        if (!chdir($pname)) {
+            throw new CoFailedException("Failed to chdir to $pname");
+        }
+
+        echo "Fetching $name to $pname\n";
+        Exec::exec('git fetch origin');
+    }
+
+    function pathToRepoCache($name) {
+        return $this->root . "/repo-" . md5($name);
+    }
+
+    function pathToBuildDir($repo, $id_number) {
+        $id = (int) $id_number;
+        $repo_hash = md5($repo);
+        $type = $this->type;
+
+        return $this->root . "/$type-$repo_hash-$id";
+    }
+
+    function guard($path) {
+        $res = fopen("$path.lock", 'c');
+        while (!flock($res, LOCK_EX)) {
+            echo "waiting for lock on $path...\n";
+            sleep(1);
+        }
+
+        return  $res;
+    }
+
+    function release($res) {
+        fclose($res);
+    }
+
+}
+
+class CoFailedException extends \Exception {}
\ No newline at end of file
diff --git a/src/EventClassifier.php b/src/EventClassifier.php
new file mode 100644
index 0000000..9f3a722
--- /dev/null
+++ b/src/EventClassifier.php
@@ -0,0 +1,132 @@
+<?php
+
+namespace GHE;
+
+class EventClassifier {
+    public static function classifyEvent($payload) {
+        if (self::isIssuesEvent($payload)) {
+            return "issues";
+        }
+
+        if (self::isIssueComment($payload)) {
+            return "issue_comment";
+        }
+
+        if (self::isCommitComment($payload)) {
+            return "commit_comment";
+        }
+
+        if (self::isPullRequestReviewComment($payload)) {
+            return "pull_request_review_comment";
+        }
+
+        if (self::isPullRequestReviewEvent($payload)) {
+            return "pull_request_review";
+        }
+
+        if (self::isPullRequestEvent($payload)) {
+            return "pull_request";
+        }
+
+        if (self::isStatusEvent($payload)) {
+            return "status";
+        }
+
+        if (self::isPushEvent($payload)) {
+            return "push";
+        }
+
+        if (self::isWatchEvent($payload)) {
+            return "watch";
+        }
+
+        if (self::isForkEvent($payload)) {
+            return "fork";
+        }
+
+        throw new EventClassifierUnknownException();
+    }
+
+    public static function isIssuesEvent($payload) {
+        return isset($payload->issue)
+            && !isset($payload->comment)
+            && isset($payload->action)
+            && in_array($payload->action,
+                        [ "assigned", "unassigned", "labeled",
+                          "unlabeled", "opened", "edited",
+                          "milestoned", "demilestoned", "closed",
+                          "reopened" ]);
+    }
+
+    public static function isIssueComment($payload) {
+        return isset($payload->issue)
+            && isset($payload->comment)
+            && isset($payload->action)
+            && in_array($payload->action,
+                        ['created', 'edited', 'deleted']);
+    }
+
+    public static function isCommitComment($payload) {
+        return !isset($payload->issue)
+            && !isset($payload->pull_request)
+            && isset($payload->comment)
+            && isset($payload->action);
+    }
+
+    public static function isPullRequestReviewComment($payload) {
+        return !isset($payload->issue)
+            && isset($payload->pull_request)
+            && isset($payload->comment)
+            && isset($payload->action)
+            && in_array($payload->action,
+                        ['created', 'edited', 'deleted']);
+    }
+
+    public static function isPullRequestReviewEvent($payload) {
+        return isset($payload->review)
+            && isset($payload->pull_request)
+            && isset($payload->action)
+            && in_array($payload->action,
+                        ['submitted', 'edited', 'dismissed']);
+    }
+
+    public static function isPullRequestEvent($payload) {
+        return isset($payload->number)
+            && isset($payload->pull_request)
+            && isset($payload->action)
+            && in_array($payload->action,
+                        [ "assigned", "unassigned",
+                          "review_requested",
+                          "review_request_removed", "labeled",
+                          "unlabeled", "opened", "edited", "closed",
+                          "reopened", "synchronize" ]);
+    }
+
+    public static function isStatusEvent($payload) {
+        return isset($payload->sha)
+            && isset($payload->commit)
+            && isset($payload->state)
+            && in_array($payload->state,
+                        ['pending', 'success', 'failure', 'error']);
+
+    }
+
+    public static function isPushEvent($payload) {
+        return isset($payload->head_commit)
+            && isset($payload->commits)
+            && isset($payload->compare)
+            && isset($payload->forced);
+    }
+
+    public static function isWatchEvent($payload) {
+        return isset($payload->action)
+            && $payload->action == "started";
+    }
+
+    public static function isForkEvent($payload) {
+        return isset($payload->forkee);
+    }
+
+}
+
+class EventClassifierUnknownException extends \Exception{};
\ No newline at end of file
diff --git a/src/Exec.php b/src/Exec.php
new file mode 100644
index 0000000..aa05bfa
--- /dev/null
+++ b/src/Exec.php
@@ -0,0 +1,42 @@
+<?php
+
+namespace GHE;
+
+class Exec {
+    public static function exec($cmd, $args = array()) {
+        $safeArgs = array_map('escapeshellarg', $args);
+        $interiorCmd = vsprintf($cmd, $safeArgs);
+
+        $exteriorCmd = sprintf('/bin/sh -o pipefail -euc %s 2>&1',
+                               escapeshellarg($interiorCmd));
+
+        exec($exteriorCmd, $output, $return);
+
+        if ($return > 0) {
+            throw new ExecException($cmd, $args, $output, $return);
+        }
+
+        return $output;
+    }
+}
+
+class ExecException extends \Exception {
+    protected $args;
+    protected $output;
+
+    public function __construct($cmd, $args, $output, $return) {
+        $this->args = $args;
+        $this->output = $output;
+
+        parent::__construct("Error calling $cmd", $return);
+    }
+
+    public function getArgs() {
+        return $this->args;
+    }
+
+    public function getOutput() {
+        return $this->output;
+    }
+
+}
\ No newline at end of file
diff --git a/src/NixBuild.php b/src/NixBuild.php
new file mode 100644
index 0000000..ab2eb15
--- /dev/null
+++ b/src/NixBuild.php
@@ -0,0 +1,3 @@
+<?php
+
+namespace GHE;
diff --git a/src/TestExec.php b/src/TestExec.php
new file mode 100644
index 0000000..72bc178
--- /dev/null
+++ b/src/TestExec.php
@@ -0,0 +1,68 @@
+<?php
+
+namespace GHE;
+
+class TestExec extends \PHPUnit\Framework\TestCase
+{
+    /**        Exec::exec('curl -L %s | git am --no-gpg-sign -');
+
+     */
+    function testExecBasic() {
+        $this->assertEquals(
+            ['oof'],
+            Exec::exec('echo foo | rev')
+        );
+    }
+
+    function testExecArgs() {
+        $this->assertEquals(
+            ['rab'],
+            Exec::exec('echo %s | rev', ['bar'])
+        );
+    }
+
+    function testExecArgsDangerous() {
+        $this->assertEquals(
+            ['$(whoami)'],
+            Exec::exec('echo %s', ['$(whoami)'])
+        );
+    }
+
+    function testExecFailureExceptions() {
+        $this->expectException(ExecException::class);
+        $this->expectExceptionCode(123);
+        $this->expectExceptionMessage("Error calling exit 123");
+        Exec::exec('exit 123');
+    }
+
+    function testExecFailureExceptionsOutput() {
+        try {
+            Exec::exec('echo %s; exit %s', ["heya", 10]);
+            $this->assertFalse(true, "Should have excepted!");
+        } catch (ExecException $e) {
+            $this->assertEquals(10, $e->getCode());
+            $this->assertEquals(["heya", 10], $e->getArgs());
+            $this->assertEquals(["heya"], $e->getOutput());
+        }
+    }
+
+
+    function testExecFailureExceptionPipefailEnd() {
+        try {
+            var_dump(Exec::exec('echo "foo" | (exit 2);'));
+            $this->assertFalse(true, "Should have excepted!");
+        } catch (ExecException $e) {
+            $this->assertEquals(2, $e->getCode());
+        }
+    }
+
+    function testExecFailureExceptionPipefailStart() {
+        try {
+            var_dump(Exec::exec('(echo "foo"; exit 3) | rev;'));
+            $this->assertFalse(true, "Should have excepted!");
+        } catch (ExecException $e) {
+            $this->assertEquals(3, $e->getCode());
+        }
+    }
+
+}
\ No newline at end of file
diff --git a/web/index.php b/web/index.php
new file mode 100644
index 0000000..5435e52
--- /dev/null
+++ b/web/index.php
@@ -0,0 +1,27 @@
+<?php
+
+require_once __DIR__ . '/../config.php';
+use PhpAmqpLib\Message\AMQPMessage;
+
+$connection = rabbitmq_conn();
+$channel = $connection->channel();
+
+$input = json_decode(file_get_contents('php://input'), true);
+if (!isset($input['repository']['full_name'])) {
+   echo "no full_name set?";
+   exit(0);
+}
+
+
+$name = strtolower($input['repository']['full_name']);
+if (!GHE\ACL::isRepoEligible($name)) {
+   echo "repo not in ok name list";
+   exit(1);
+}
+
+$channel->exchange_declare($name, 'fanout', false, true, false);
+
+$message = new AMQPMessage(json_encode($input),
+         array('content_type' => 'application/json'));
+
+$channel->basic_publish($message, $name);