[BUGS-5651] Workaround issue with preUpdate script. (#470)

* Run composer update twice.

* Add ssh keys step.

* Set platform.php instead of running composer twice.

* Delete not relevant comment.

* Workaround non-existing vendor folder issue to set platform.php the right way.

* Some cleanup.

.circleci/config.yml

@@ -70,6 +70,9 @@ jobs:
             - run:
                 name: Disable strict SSH host checking to prevent SSH connect issues
                 command: echo "StrictHostKeyChecking no" >> "$HOME/.ssh/config"
+            - add_ssh_keys:
+                fingerprints:
+                - "74:82:8b:ea:78:ad:23:23:68:70:b6:07:5c:2b:4b:e0"
             - run:
                 name: Test D9 with GitHub
                 command: ./.circleci/test-github-repo.sh "d9"
@@ -160,6 +163,9 @@ jobs:
             - run:
                 name: Disable strict SSH host checking to prevent SSH connect issues
                 command: echo "StrictHostKeyChecking no" >> "$HOME/.ssh/config"
+            - add_ssh_keys:
+                fingerprints:
+                - "74:82:8b:ea:78:ad:23:23:68:70:b6:07:5c:2b:4b:e0"
             - run:
                 name: Test WordPress with GitHub
                 command: ./.circleci/test-github-repo.sh "pantheon-systems/example-wordpress-composer:dev-master" --use-ssh

src/Commands/BuildToolsBase.php

@@ -437,6 +437,7 @@ protected function createFromSourceProject($source, $target, $stability = '', $t
         if ($source === '[email protected]:pantheon-upstreams/drupal-composer-managed.git' && empty($stability_flag)) {
             // This is not published in packagist so it needs dev stability.
             $stability_flag = '--stability dev';
+            $additional_commands[] = "mkdir $tmpsitedir/$target/vendor";
             $additional_commands[] = "composer --working-dir=$tmpsitedir/$target require pantheon-upstreams/upstream-configuration:'*' --no-update";
             $additional_commands[] = "composer --working-dir=$tmpsitedir/$target config minimum-stability dev";
             $additional_commands[] = "composer --working-dir=$tmpsitedir/$target install -n";

src/Commands/ProjectCreateCommand.php

@@ -380,7 +380,7 @@ public function createProject(
             // Install packages depending on the application.
             if ($app === 'Drupal') {
                 exec("composer --working-dir=$siteDir require --no-update --dev drupal/coder drupal/drupal-extension drupal/drupal-driver");
-                exec("composer --working-dir=$siteDir require --no-update drush-ops/behat-drush-endpoint");
+                exec("composer --working-dir=$siteDir require --no-update --dev drush-ops/behat-drush-endpoint");
                 exec("composer --working-dir=$siteDir require --no-update pantheon-systems/quicksilver-pushback");
             } elseif (strtolower($app) === 'wordpress') {
                 exec("composer --working-dir=$siteDir require --no-update --dev wp-coding-standards/wpcs");