Added sandcastle pre-commit

Test Plan:
Lately we have been breaking our builds too often. This changes adds
the capability to schedule tests in sandcastle for every diff created. This will
help us increase the pre-commit testing bar.

This patch will dispatch signals to sandcastle to start running tests on the
diff. The test failures are reported to the user via email.

The user can also manually check the progress of test in sandcastle via the URL
provided.

Reviewers: sdong, rven

Subscribers: dhruba, leveldb

Differential Revision: https://reviews.facebook.net/D53001

arcanist_util/config/FacebookArcanistConfiguration.php

@@ -10,13 +10,112 @@ class FacebookArcanistConfiguration extends ArcanistConfiguration {
                                  ArcanistBaseWorkflow $workflow,
                                  $error_code) {
     if ($command == 'diff' && !$workflow->isRawDiffSource()) {
-      $this->maybePushToJenkins($workflow);
+      $this->startTestsInJenkins($workflow);
+      $this->startTestsInSandcastle($workflow);
     }
   }
 
+  //////////////////////////////////////////////////////////////////////
+  /*  Run tests in sandcastle */
+  function getSteps($diffID, $username) {
+    $arcrc_content = exec("cat ~/.arcrc | base64 -w0");
+
+    $setup = array(
+      "name" => "Setup arcrc",
+      "shell" => "echo " . $arcrc_content . " | base64 --decode > ~/.arcrc",
+      "user" => "root"
+    );
+
+    $fix_permission = array(
+      "name" => "Fix environment",
+      "shell" => "chmod 600 ~/.arcrc",
+      "user" => "root"
+    );
+
+    $fix_git_ignore = array(
+      "name" => "Fix git ignore",
+      "shell" => "echo fbcode >> .git/info/exclude",
+      "user" => "root"
+    );
+
+    $patch = array(
+      "name" => "Patch " . $diffID,
+      "shell" => "HTTPS_PROXY=fwdproxy:8080 arc --arcrc-file ~/.arcrc "
+                  . "patch D" . $diffID . " || rm -f ~/.arcrc",
+      "user" => "root"
+    );
+
+    $cleanup = array(
+      "name" => "Arc cleanup",
+      "shell" => "rm -f ~/.arcrc",
+      "user" => "root"
+    );
+
+    $steps[] = $setup;
+    $steps[] = $fix_permission;
+    $steps[] = $fix_git_ignore;
+    $steps[] = $patch;
+    $steps[] = $cleanup;
+
+    $tests = array(
+      "unit", "clang_unit", "tsan", "asan", "valgrind"
+    );
+
+    foreach ($tests as $test) {
+      $run_test = array(
+        "name" => "Run " . $test,
+        "shell" => "EMAIL=" . $username . "@fb.com "
+                    . "./build_tools/rocksdb-lego-determinator " . $test,
+        "user" => "root",
+        "determinator" => true
+      );
+
+      $steps[] = $run_test;
+    }
+
+    return $steps;
+  }
+
+  function startTestsInSandcastle($workflow) {
+    $diffID = $workflow->getDiffId();
+    $username = exec("whoami");
+
+    if ($diffID == null || $username == null) {
+      return;
+    }
+
+    $arg = array(
+      "name" => "RocksDB diff D" . $diffID . "testing for " . $username,
+      "steps" => $this->getSteps($diffID, $username)
+    );
+
+    $url = 'https://interngraph.intern.facebook.com/sandcastle/generate?'
+            .'command=SandcastleUniversalCommand'
+            .'&vcs=rocksdb-git&revision=origin%2Fmaster&type=lego'
+            .'&user=krad&alias=ci-util'
+            .'&command-args=' . urlencode(json_encode($arg));
+
+    $cmd = 'https_proxy= HTTPS_PROXY= curl -s -k -F app=659387027470559 '
+            . '-F token=AeO_3f2Ya3TujjnxGD4 "' . $url . '"';
+
+    echo "\n====================================================== \n";
+    echo "Scheduling sandcastle job for D" . $diffID . " for " . $username;
+    echo "\n";
+    echo "Please follow the URL for details on the job. \n";
+    echo "An email will be sent to " . $username . "@fb.com on failure. \n";
+    echo "\n";
+    echo "Job details: \n";
+
+    $output = shell_exec($cmd);
+
+    echo $output;
+
+    echo "\n====================================================== \n";
+  }
+
   //////////////////////////////////////////////////////////////////////
   /* Send off builds to jenkins */
-  function maybePushToJenkins($workflow) {
+  function startTestsInJenkins($workflow) {
     $diffID = $workflow->getDiffID();
     if ($diffID === null) {
       return;