diff --git a/.github/workflows/auto-tag.yml b/.github/workflows/auto-tag.yml
new file mode 100644
index 0000000..33446ca
--- /dev/null
+++ b/.github/workflows/auto-tag.yml
@@ -0,0 +1,12 @@
+name: Auto-tag
+on:
+  push:
+    tags:
+      - '*.*.*'
+jobs:
+  auto-tag:
+    name: Auto-tag
+    runs-on: ubuntu-latest
+    steps:
+      - name: Auto-tag
+        uses: silverstripe/gha-auto-tag@main
diff --git a/README.md b/README.md
index 97b3080..b22c874 100644
--- a/README.md
+++ b/README.md
@@ -2,4 +2,4 @@
 
 Create a dynamic Silverstripe CI matrix
 
-See [gha-ci](https://github.com/silverstripe/gha-ci)
+Only intended to be used within [gha-ci](https://github.com/silverstripe/gha-ci). See that repository for details on inputs.
diff --git a/action.php b/action.php
new file mode 100644
index 0000000..52ac606
--- /dev/null
+++ b/action.php
@@ -0,0 +1,13 @@
+<?php
+
+include 'consts.php';
+include 'job_creator.php';
+
+// Reads inputs.yml and creates a new json matrix
+$inputs = yaml_parse(file_get_contents('__inputs.yml'));
+if ($inputs === false) {
+    echo 'Unable to parse __inputs.yml';
+    exit(1);
+}
+$jobCreator = new JobCreator();
+echo $jobCreator->createJson($inputs);
diff --git a/action.yml b/action.yml
index 9bda70c..20622da 100644
--- a/action.yml
+++ b/action.yml
@@ -1,12 +1,13 @@
 name: Generate Matrix
 description: GitHub Action to create a dynamic Silverstripe CI matrix
+
 inputs:
   # extra jobs must be multi-line string, as there's no support for type: array for inputs
   extra_jobs:
     type: string
     required: false
     default: ''
-  # simple matrix will only run a single php 7.4 mysql 5.7 job instead of a full matrix
+  # simple matrix will only run a single job with the lowest supported PHP and mysql versions instead of a full matrix
   simple_matrix:
     type: boolean
     default: false
@@ -26,21 +27,26 @@ inputs:
   js:
     type: boolean
     default: true
+
 # https://docs.github.com/en/actions/creating-actions/metadata-syntax-for-github-actions
 outputs:
   matrix:
     description: JSON matrix
     value: ${{ steps.php-script.outputs.matrix }}
+
 runs:
   using: composite
   steps:
+
     - name: Checkout code
-      uses: actions/checkout@ec3a7ce113134d7a93b817d10a8272cb61118579 #v2
+      uses: actions/checkout@7884fcad6b5d53d10323aee724dc68d8b9096a2e # v2.4.2
+
     - name: Install PHP
-      uses: shivammathur/setup-php@aa1fe473f9c687b6fb896056d771232c0bc41161 #v2
+      uses: shivammathur/setup-php@3eda58347216592f618bb1dff277810b6698e4ca # v2.19.1
       with:
-        php-version: '7.4'
+        php-version: '8.1'
         extensions: yaml
+
     - name: Create __inputs.yml
       shell: bash
       # Add string inputs to memory instead of using string substituion in shell script
@@ -52,7 +58,12 @@ runs:
         # github.ref_name is the name of the branch on push, and the tag on tag
         GITHUB_MY_REF: ${{ github.base_ref && github.base_ref || github.ref_name }}
       run: |
-        if [ -f __inputs.yml ]; then rm __inputs.yml; fi
+        # Escape double quotes '"' => '\"'
+        EXTRA_JOBS=${EXTRA_JOBS//\"/\\\"}
+        GITHUB_MY_REF=${GITHUB_MY_REF//\"/\\\"}
+        if [ -f __inputs.yml ]; then
+          rm __inputs.yml
+        fi
         touch __inputs.yml
         echo "endtoend: ${{ inputs.endtoend }}" >> __inputs.yml
         echo "js: ${{ inputs.js }}" >> __inputs.yml
@@ -62,14 +73,17 @@ runs:
         echo "simple_matrix: ${{ inputs.simple_matrix }}" >> __inputs.yml
         echo "github_repository: $GITHUB_REPOSITORY" >> __inputs.yml
         echo "github_my_ref: $GITHUB_MY_REF" >> __inputs.yml
-        if [[ "$EXTRA_JOBS" != "" ]]; then echo "extra_jobs:" >> __inputs.yml; fi
-        if [[ "$EXTRA_JOBS" != "" ]]; then echo "$EXTRA_JOBS" >> __inputs.yml; fi
+        if [[ "$EXTRA_JOBS" != "" ]]; then
+          echo "extra_jobs:" >> __inputs.yml
+          echo "$EXTRA_JOBS" >> __inputs.yml
+        fi
         echo "cat __inputs.yml"
         cat __inputs.yml
+
     - name: Run php script
       id: php-script
       shell: bash
       run: |
-        MATRIX_JSON=$(php ${{ github.action_path }}/script.php)
+        MATRIX_JSON=$(php ${{ github.action_path }}/action.php)
         echo "MATRIX_JSON: $MATRIX_JSON"
         echo "::set-output name=matrix::${MATRIX_JSON}"
diff --git a/consts.php b/consts.php
new file mode 100644
index 0000000..4ae9a91
--- /dev/null
+++ b/consts.php
@@ -0,0 +1,68 @@
+<?php
+
+# Manually update this after each minor CMS release
+const INSTALLER_TO_PHP_VERSIONS = [
+    '4.9' => [
+        '7.1',
+        '7.2',
+        '7.3',
+        '7.4'
+    ],
+    '4.10' => [
+        '7.3',
+        '7.4',
+        '8.0',
+    ],
+    '4.11' => [
+        '7.4',
+        '8.0',
+        '8.1',
+    ],
+    '4' => [
+        '7.4',
+        '8.0',
+        '8.1',
+    ],
+];
+
+const DB_MYSQL_57 = 'mysql57';
+const DB_MYSQL_57_PDO = 'mysql57pdo';
+const DB_MYSQL_80 = 'mysql80';
+const DB_PGSQL = 'pgsql';
+
+// Used when determining the version of installer to used. Intentionally doesn't include recipes
+const LOCKSTEPED_REPOS = [
+    'silverstripe-admin',
+    'silverstripe-asset-admin',
+    'silverstripe-assets',
+    'silverstripe-campaign-admin',
+    'silverstripe-cms',
+    'silverstripe-errorpage',
+    'silverstripe-framework',
+    'silverstripe-reports',
+    'silverstripe-siteconfig',
+    'silverstripe-versioned',
+    'silverstripe-versioned-admin',
+    // recipe-solr-search doesn't include recipe-cms or recipe-core unlike our other recipes
+    'recipe-solr-search',
+];
+
+// Repositories that do not require silverstripe/installer to be explicitly added as a dependency for testing
+const NO_INSTALLER_REPOS = [
+    // these are/include recipe-cms or recipe-core, so we don't want to composer require installer
+    // in .travis.yml they used the 'self' provision rather than 'standard'
+    'recipe-authoring-tools',
+    'recipe-blog',
+    'recipe-ccl',
+    'recipe-cms',
+    'recipe-collaboration',
+    'recipe-content-blocks',
+    'recipe-core',
+    'recipe-form-building',
+    'recipe-kitchen-sink',
+    'recipe-reporting-tools',
+    'recipe-services',
+    'silverstripe-installer',
+    // vendor-plugin is not a recipe, though we also do not want installer
+    'vendor-plugin'
+];
diff --git a/job_creator.php b/job_creator.php
new file mode 100644
index 0000000..fa5539d
--- /dev/null
+++ b/job_creator.php
@@ -0,0 +1,273 @@
+<?php
+
+class JobCreator
+{
+    private $installerVersion = null;
+
+    /**
+     * Get the correct version of silverstripe/installer to include for the given repository and branch
+     */
+    public function getInstallerVersion(string $githubRepository, string $branch): string
+    {
+        $repo = explode('/', $githubRepository)[1];
+        if (in_array($repo, NO_INSTALLER_REPOS)) {
+            return '';
+        }
+        // e.g. ['4', '11']
+        $portions = explode('.', $branch);
+        if (count($portions) == 1) {
+            return '4.x-dev';
+        }
+        if (in_array($repo, LOCKSTEPED_REPOS)) {
+            return '4' . $portions[1] . 'x-dev';
+        } else {
+            // use the latest minor version of installer
+            $installerVersions = array_keys(INSTALLER_TO_PHP_VERSIONS);
+            // remove '4' version
+            $installerVersions = array_diff($installerVersions, ['4']);
+            // get the minor portions of the verisons e.g. [9, 10, 11]
+            $minorPortions = array_map(fn($portions) => (int) explode('.', $portions)[1], $installerVersions);
+            sort($minorPortions);
+            return '4.' . $minorPortions[count($minorPortions) - 1] . '.x-dev';
+        }
+    }
+    
+    public function createJob(int $phpIndex, array $opts): array
+    {
+        $installerKey = str_replace('.x-dev', '', $this->installerVersion);
+        $installerKey = $installerKey ?: '4';
+        $phpVersions = INSTALLER_TO_PHP_VERSIONS[$installerKey];
+        $default = [
+            # ensure there's a default value for all possible return keys
+            # this allows us to use `if [[ "${{ matrix.key }}" == "true" ]]; then` in github-actions-ci-cd/ci.yml
+            'installer_version' => $this->installerVersion,
+            'php' => $phpVersions[$phpIndex] ?? $phpVersions[count($phpVersions) - 1],
+            'db' => DB_MYSQL_57,
+            'composer_require_extra' => '',
+            'composer_args' => '',
+            'name_suffix' => '',
+            'phpunit' => false,
+            'phpunit_suite' => 'all',
+            'phplinting' => false,
+            'phpcoverage' => false,
+            'endtoend' => false,
+            'endtoend_suite' => 'root',
+            'endtoend_config' => '',
+            'js' => false,
+        ];
+        return array_merge($default, $opts);
+    }
+    
+    private function parseBoolValue(mixed $value): bool
+    {
+        return ($value === true || $value === 'true');
+    }
+
+    private function createPhpunitJobs(array $matrix, bool $simpleMatrix, string $suite): array
+    {
+        if ($simpleMatrix) {
+            $matrix['include'][] = $this->createJob(0, [
+                'phpunit' => true,
+                'phpunit_suite' => $suite,
+            ]);
+        } else {
+            $matrix['include'][] = $this->createJob(0, [
+                'composer_args' => '--prefer-lowest',
+                'phpunit' => true,
+                'phpunit_suite' => $suite,
+            ]);
+            $matrix['include'][] = $this->createJob(1, [
+                'db' => DB_PGSQL,
+                'phpunit' => true,
+                'phpunit_suite' => $suite,
+            ]);
+            $matrix['include'][] = $this->createJob(3, [
+                'db' => DB_MYSQL_80,
+                'phpunit' => true,
+                'phpunit_suite' => $suite,
+            ]);
+        }
+        return $matrix;
+    }
+
+    private function buildDynamicMatrix(
+        array $matrix,
+        array $run,
+        bool $simpleMatrix,
+        string $githubRepository
+    ): array {
+        if ($run['phpunit'] && (file_exists('phpunit.xml') || file_exists('phpunit.xml.dist'))) {
+            $dom = new DOMDocument();
+            $dom->preserveWhiteSpace = false;
+            $dom->load(file_exists('phpunit.xml') ? 'phpunit.xml' : 'phpunit.xml.dist');
+            $xpath = new DOMXPath($dom);
+            // assume phpunit.xml has defined testsuites
+            foreach ($xpath->query('//testsuite') as $testsuite) {
+                if (!$testsuite->hasAttribute('name') || $testsuite->getAttribute('name') == 'Default') {
+                    continue;
+                }
+                $matrix = $this->createPhpunitJobs($matrix, $simpleMatrix, $testsuite->getAttribute('name'));
+            }
+            // phpunit.xml has no defined testsuites, or only defaults a "Default"
+            if (count($matrix['include']) == 0) {
+                $matrix = $this->createPhpunitJobs($matrix, $simpleMatrix, 'all');
+            }
+        }
+        // skip phpcs on silverstripe-installer which include sample file for use in projects
+        if ($run['phplinting'] && (file_exists('phpcs.xml') || file_exists('phpcs.xml.dist')) && !preg_match('#/silverstripe-installer$#', $githubRepository)) {
+            $matrix['include'][] = $this->createJob(0, [
+                'phplinting' => true
+            ]);
+        }
+        // phpcoverage also runs unit tests
+        // always run on silverstripe account
+        if ($run['phpcoverage'] || preg_match('#^silverstripe/#', $githubRepository)) {
+            if ($simpleMatrix) {
+                $matrix['include'][] = $this->createJob(0, [
+                    'phpcoverage' => true
+                ]);
+            } else {
+                $matrix['include'][] = $this->createJob(2, [
+                    'db' => DB_MYSQL_57_PDO,
+                    'phpcoverage' => true
+                ]);
+            }
+        }
+        // endtoend / behat
+        if ($run['endtoend'] && file_exists('behat.yml')) {
+            $matrix['include'][] = $this->createJob(0, [
+                'endtoend' => true,
+                'endtoend_suite' => 'root'
+            ]);
+            if (!$simpleMatrix) {
+                $matrix['include'][] = $this->createJob(3, [
+                    'db' => DB_MYSQL_80,
+                    'endtoend' => true,
+                    'endtoend_suite' => 'root'
+                ]);
+            }
+        }
+        // javascript tests
+        if ($run['js'] && file_exists('package.json')) {
+            $matrix['include'][] = $this->createJob(0, [
+                'js' => true
+            ]);
+        }
+        return $matrix;
+    }
+
+    public function createJson(array $inputs): string
+    {
+        // $myRef will either be a branch for push (i.e cron) and pull-request (target branch), or a semver tag
+        $myRef = $inputs['github_my_ref'];
+        $isTag = preg_match('#^[0-9]+\.[0-9]+\.[0-9]+$#', $myRef, $m);
+        $branch = $isTag ? sprintf('%d.%d', $m[1], $m[2]) : $myRef;
+
+        $githubRepository = $inputs['github_repository'];
+        $this->installerVersion = $this->getInstallerVersion($githubRepository, $branch);
+
+        $run = [];
+        $extraJobs = [];
+        $dynamicMatrix = true;
+        $simpleMatrix = false;
+        foreach ($inputs as $input => $value) {
+            if (in_array($input, ['endtoend', 'js', 'phpunit', 'phpcoverage', 'phplinting'])) {
+                $run[$input] = $this->parseBoolValue($value);
+            } else if ($input === 'extra_jobs') {
+                if ($value === 'none') {
+                    $value = [];
+                }
+                $extraJobs = $value;
+            } else if ($input === 'dynamic_matrix') {
+                $dynamicMatrix = $this->parseBoolValue($value);
+            } else if ($input === 'simple_matrix') {
+                $simpleMatrix = $this->parseBoolValue($value);
+            } else if (in_array($input, ['github_my_ref', 'github_repository'])) {
+                continue;
+            } else {
+                throw new LogicException("Unhandled input $input");
+            }
+        }
+        $matrix = ['include' => []];
+
+        if ($dynamicMatrix) {
+            $matrix = $this->buildDynamicMatrix($matrix, $run, $simpleMatrix, $githubRepository);
+        }
+
+        // extra jobs
+        foreach ($extraJobs as $arr) {
+            $matrix['include'][] = $this->createJob(0, $arr);
+        }
+
+        // convert everything to strings and sanatise values
+        foreach ($matrix['include'] as $i => $job) {
+            foreach ($job as $key => $val) {
+                if ($val === true) {
+                    $val = 'true';
+                }
+                if ($val === false) {
+                    $val = 'false';
+                }
+                // all values must be strings
+                $val = (string) $val;
+                // remove any dodgy characters
+                $val = str_replace(["\f", "\r", "\n", "\t", "'", '"', '&', '|'], '', $val);
+                // only allow visible ascii chars - see [:print:] in the table at https://www.regular-expressions.info/posixbrackets.html#posixbrackets
+                $val = preg_replace('#[^\x20-\x7E]#', '', $val);
+                // limit name_suffix length and be strict as it is used in the artifact file name
+                if ($key === 'name_suffix' && strlen($val) > 20) {
+                    $val = preg_replace('#[^a-zA-Z0-9_\- ]#', '', $val);
+                    $val = substr($val, 0, 20);
+                }
+                // composer_require_extra is used in silverstripe/gha-ci `composer require`, so throw an
+                // exception if there are any dodgy characters
+                if ($key === 'composer_require_extra' && preg_match('#[^A-Za-z0-9\-\.\^\/~: ]#', $val)) {
+                    throw new InvalidArgumentException("Invalid composer_require_extra $val");
+                }
+                // ensure x.0 versions of PHP retain the minor version
+                if ($key === 'php' && preg_match('#^[1-9]$#', $val)) {
+                    $val = "$val.0";
+                }
+                // add value back to matrix
+                $matrix['include'][$i][$key] = $val;
+            }
+        }
+
+        // job/artifacts names
+        foreach ($matrix['include'] as $i => $job) {
+            $name = [
+                $job['php']
+            ];
+            if (strpos($job['composer_args'], '--prefer-lowest') !== false) {
+                $name[] = 'prf-low';
+            }
+            $name[] = $job['db'];
+            if ($job['phpunit'] == 'true') {
+                $name[] = 'phpunit';
+                $name[] = $job['phpunit_suite'];
+            }
+            if ($job['endtoend'] == 'true') {
+                $name[] = 'endtoend';
+                $name[] = $job['endtoend_suite'] ?: 'root';
+            }
+            if ($job['js'] == 'true') {
+                $name[] = 'js';
+            }
+            if ($job['phpcoverage'] == 'true') {
+                $name[] = 'phpcoverage';
+            }
+            if ($job['phplinting'] == 'true') {
+                $name[] = 'phplinting';
+            }
+            $name[] = $job['name_suffix'];
+            $name = array_filter($name);
+            $matrix['include'][$i]['name'] = implode(' ', $name);
+        }
+
+        // output json, keep it on a single line so do not use pretty print
+        $json = json_encode($matrix, JSON_UNESCAPED_SLASHES);
+        $json = preg_replace("#\n +#", "\n", $json);
+        $json = str_replace("\n", '', $json);
+        return trim($json);
+    }
+}
\ No newline at end of file
diff --git a/script.php b/script.php
deleted file mode 100644
index 0e694ce..0000000
--- a/script.php
+++ /dev/null
@@ -1,300 +0,0 @@
-<?php
-
-const DB_MYSQL_57 = 'mysql57';
-const DB_MYSQL_57_PDO = 'mysql57pdo';
-const DB_MYSQL_80 = 'mysql80';
-const DB_PGSQL = 'pgsql';
-
-# Manually update this after each minor CMS release
-$installerToPhpVersions = [
-    '4.9' => [
-        '7.1',
-        '7.2',
-        '7.3',
-        '7.4'
-    ],
-    '4.10' => [
-        '7.3',
-        '7.4',
-        '8.0',
-    ],
-    '4.11' => [
-        '7.4',
-        '8.0',
-        '8.1',
-    ],
-    '4' => [
-        '7.4',
-        '8.0',
-        '8.1',
-    ],
-];
-
-function isLockedStepped($repo)
-{
-    return in_array($repo, [
-        'silverstripe-admin',
-        'silverstripe-asset-admin',
-        'silverstripe-assets',
-        'silverstripe-campaign-admin',
-        'silverstripe-cms',
-        'silverstripe-errorpage',
-        'silverstripe-framework',
-        'silverstripe-reports',
-        'silverstripe-siteconfig',
-        'silverstripe-versioned',
-        'silverstripe-versioned-admin',
-        // recipe-solr-search is not a true recipe, doesn't include recipe-cms/core
-        'recipe-solr-search',
-    ]);
-}
-
-function shouldNotRequireInstaller($repo)
-{
-    // these include recipe-cms/core, so we don't want to composer require installer
-    // in .travis.yml they use the 'self' provision rather than 'standard'
-    return in_array($repo, [
-        'recipe-authoring-tools',
-        'recipe-blog',
-        'recipe-ccl',
-        'recipe-cms',
-        'recipe-collaboration',
-        'recipe-content-blocks',
-        'recipe-core',
-        'recipe-form-building',
-        'recipe-kitchen-sink',
-        'recipe-reporting-tools',
-        'recipe-services',
-        'silverstripe-installer',
-        // vendor-plugin is not a recipe, though we also do not want installer
-        'vendor-plugin'
-    ]);
-}
-
-function getInstallerVersion($githubRepository, $branch)
-{
-    global $installerToPhpVersions;
-    $repo = explode('/', $githubRepository)[1];
-    if (shouldNotRequireInstaller($repo)) {
-        return '';
-    }
-    $v = explode('.', $branch);
-    if (count($v) == 1) {
-        return '4.x-dev';
-    }
-    if (isLockedStepped($repo)) {
-        return '4' . $v[1] . 'x-dev';
-    } else {
-        // use the latest minor version of installer
-        $a = array_keys($installerToPhpVersions);
-        $a = array_map(fn($k) => (int) $k, $a);
-        sort($a);
-        return $a[count($a) - 1] . 'x-dev';
-    }
-}
-
-function createJob($phpNum, $opts)
-{
-    global $installerToPhpVersions, $installerVersion;
-    $v = str_replace('.x-dev', '', $installerVersion);
-    $v = $v ?: '4';
-    $phpVersions = $installerToPhpVersions[$v];
-    $default = [
-        # ensure there's a default value for all possible return keys
-        # this allows use to use `if [ "${{ matrix.key }}" == "true" ]; then` in github-actions-ci-cd/ci.yml
-        'installer_version' => $installerVersion,
-        'php' => $phpVersions[$phpNum] ?? $phpVersions[count($phpVersions) - 1],
-        'db' => DB_MYSQL_57,
-        'composer_require_extra' => '',
-        'composer_args' => '',
-        'name_suffix' => '',
-        'phpunit' => false,
-        'phpunit_suite' => 'all',
-        'phplinting' => false,
-        'phpcoverage' => false,
-        'endtoend' => false,
-        'endtoend_suite' => 'root',
-        'endtoend_config' => '',
-        'js' => false,
-    ];
-    return array_merge($default, $opts);
-}
-
-function parseBoolValue($value)
-{
-    return ($value === true || $value === 'true');
-}
-
-// Reads inputs.yml and creates a new json matrix
-$inputs = yaml_parse(file_get_contents('__inputs.yml'));
-
-// $myRef will either be a branch for push (i.e cron) and pull-request (target branch), or a semver tag
-$myRef = $inputs['github_my_ref'];
-$isTag = preg_match('#^[0-9]+\.[0-9]+\.[0-9]+$#', $myRef, $m);
-$branch = $isTag ? sprintf('%d.%d', $m[1], $m[2]) : $myRef;
-
-$githubRepository = $inputs['github_repository'];
-$installerVersion = getInstallerVersion($githubRepository, $branch);
-
-$run = [];
-$extraJobs = [];
-$simpleMatrix = false;
-foreach ($inputs as $input => $value) {
-    if (in_array($input, ['endtoend', 'js', 'phpunit', 'phpcoverage', 'phplinting'])) {
-        $run[$input] = parseBoolValue($value);
-    } else if ($input === 'extra_jobs') {
-        if ($value === 'none') {
-            $value = [];
-        }
-        $extraJobs = $value;
-        foreach ($extraJobs as $job) {
-            $job = createJob(3, $job);
-        }
-    } else if ($input === 'simple_matrix') {
-        $simpleMatrix = parseBoolValue($value);
-    }
-}
-$matrix = ['include' => []];
-if ((file_exists('phpunit.xml') || file_exists('phpunit.xml.dist')) && $run['phpunit']) {
-    $d = new DOMDocument();
-    $d->preserveWhiteSpace = false;
-    $fn = file_exists('phpunit.xml') ? 'phpunit.xml' : 'phpunit.xml.dist';
-    $d->load($fn);
-    $x = new DOMXPath($d);
-    $tss = $x->query('//testsuite');
-    // phpunit.xml has defined testsuites
-    foreach ($tss as $ts) {
-        if (!$ts->hasAttribute('name') || $ts->getAttribute('name') == 'Default') {
-            continue;
-        }
-        if ($simpleMatrix) {
-            $matrix['include'][] = createJob(0, [
-                'phpunit' => true,
-                'phpunit_suite' => $ts->getAttribute('name'),
-            ]);
-        } else {
-            $matrix['include'][] = createJob(0, [
-                'composer_args' => '--prefer-lowest',
-                'phpunit' => true,
-                'phpunit_suite' => $ts->getAttribute('name'),
-            ]);
-            $matrix['include'][] = createJob(1, [
-                'db' => 'pgsql',
-                'phpunit' => true,
-                'phpunit_suite' => $ts->getAttribute('name')
-            ]);
-            $matrix['include'][] = createJob(3, [
-                'db' => DB_MYSQL_80,
-                'phpunit' => true,
-                'phpunit_suite' => $ts->getAttribute('name')
-            ]);
-        }
-    }
-    // phpunit.xml has no defined testsuites
-    if (count($matrix['include']) == 0) {
-        if ($simpleMatrix) {
-            $matrix['include'][] = createJob(0, [
-                'phpunit' => true,
-                'phpunit_suite' => 'all'
-            ]);
-        } else {
-            $matrix['include'][] = createJob(0, [
-                'composer_args' => '--prefer-lowest',
-                'phpunit' => true,
-                'phpunit_suite' => 'all'
-            ]);
-            $matrix['include'][] = createJob(1, [
-                'db' => DB_PGSQL,
-                'phpunit' => true,
-                'phpunit_suite' => 'all'
-            ]);
-            $matrix['include'][] = createJob(3, [
-                'db' => DB_MYSQL_80,
-                'phpunit' => true,
-                'phpunit_suite' => 'all'
-            ]);
-        }
-    }
-}
-// skip phpcs on silverstripe-installer which include sample file for use in projects
-if ((file_exists('phpcs.xml') || file_exists('phpcs.xml.dist')) && !preg_match('#/silverstripe-installer$#', $githubRepository)) {
-    $matrix['include'][] = createJob(0, [
-        'phplinting' => true
-    ]);
-}
-// phpcoverage also runs unit tests
-// always run on silverstripe account
-if ($run['phpcoverage'] || preg_match('#^silverstripe/#', $githubRepository)) {
-    if ($simpleMatrix) {
-        $matrix['include'][] = createJob(0, [
-            'phpcoverage' => true
-        ]);
-    } else {
-        $matrix['include'][] = createJob(2, [
-            'db' => DB_MYSQL_57_PDO,
-            'phpcoverage' => true
-        ]);
-    }
-}
-// endtoend / behat
-if ($run['endtoend'] && file_exists('behat.yml')) {
-    $matrix['include'][] = createJob(0, [
-        'endtoend' => true,
-        'endtoend_suite' => 'root'
-    ]);
-    if (!$simpleMatrix) {
-        $matrix['include'][] = createJob(3, [
-            'db' => DB_MYSQL_80,
-            'endtoend' => true,
-            'endtoend_suite' => 'root'
-        ]);
-    }
-}
-// javascript tests
-if (file_exists('package.json') && $run['js']) {
-    $matrix['include'][] = createJob(0, [
-        'js' => true
-    ]);
-}
-// extra jobs
-foreach ($extraJobs as $arr) {
-    $matrix['include'][] = createJob(0, $arr);
-}
-
-// convert everything to strings and sanatise values
-foreach ($matrix['include'] as $i => $job) {
-    foreach ($job as $key => $val) {
-        if ($val === true) {
-            $val = 'true';
-        }
-        if ($val === false) {
-            $val = 'false';
-        }
-        // all values must be strings
-        $val = (string) $val;
-        // remove any dodgy characters
-        $val = str_replace(["\r", "\n", "\t", "'", '"', '&', '|'], '', $val);
-        // ascii chars only - https://www.regular-expressions.info/posixbrackets.html
-        $val = preg_replace('#[^\x20-\x7E]#', '', $val);
-        // limit name_suffix length and be strict as it is used in the artifact file name
-        if ($key === 'name_suffix') {
-            if (strlen($val) > 20) {
-                $val = preg_replace('#[^a-zA-Z0-9_\- ]#', '', $val);
-                $val = substr($val, 0, 20);
-            }
-        }
-        // be strict with composer_require_extra
-        if ($key === 'composer_require_extra') {
-            $val = preg_replace('#[^A-Za-z0-9\-\.\^\/~: ]#', '', $val);
-        }
-        // add value back to matrix
-        $matrix['include'][$i][$key] = $val;
-    }
-}
-
-// output json, keep it on a single line so do not use pretty print
-$json = json_encode($matrix);
-$json = preg_replace("#\n +#", "\n", $json);
-$json = str_replace('\\/', '/', $json);
-$json = str_replace("\n", '', $json);
-echo trim($json);