Retrieve WCPay Dev Tools plugin zip from the private repo

features/plugins.php

@@ -139,6 +139,12 @@ function ( $options_page ) {
 							'text' => __( 'Licensing API OAuth2 token to provision Jetpack products with. Leave blank to disable.', 'jurassic-ninja' ),
 							'sanitize' => false,
 						),
+						'wcpay_dev_tools_github_token' => array(
+							'id' => 'wcpay_dev_tools_github_token',
+							'title' => __( 'GitHub Token for WooPayments Dev Tool Private Repo', 'jurassic-ninja' ),
+							'text' => __( 'Set a fined-grain GitHub token with read-only access to retrieve the latest commit from the repo directly.', 'jurassic-ninja' ),
+							'sanitize' => false,
+						),
 						'add_gutenberg_by_default' => array(
 							'id' => 'add_gutenberg_by_default',
 							'title' => __( 'Add Gutenberg to every launched WordPress', 'jurassic-ninja' ),

features/woocommerce-payments.php

@@ -90,13 +90,48 @@ function ( $s ) use ( $cmd ) {
 	);
 }
 
+/**
+ * Gets the zip link for the WooCommerce Payments Dev Tools plugin from the private GitHub repo.
+ *
+ * @return string|null The zip link. Null if it can not be retrieved.
+ */
+function get_private_wcpay_dev_tools_zipball_link(): ?string {
+	$response = wp_remote_head(
+		'https://api.github.com/repos/Automattic/woocommerce-payments-dev-tools-ci/zipball/trunk',
+		array(
+			'headers' => array(
+				'Authorization' => 'Bearer ' . settings( 'wcpay_dev_tools_github_token', '' ),
+			),
+		)
+	);
+
+	$status      = wp_remote_retrieve_response_code( $response );
+	$location    = wp_remote_retrieve_header( $response, 'location' );
+
+	if ( 302 === $status
+		&& is_string( $location ) &&
+		wp_http_validate_url( $location )
+	) {
+		return $location;
+	}
+
+	push_error(
+		new \WP_Error(
+			'wcpay_dev_tools_private_repo',
+			__( 'Can not retrieve the WooCommerce Payments Dev Tools private repo. The GitHub fined-grain token may be invalid.', 'jurassic-ninja' )
+		)
+	);
+	return null;
+}
 /**
  * Installs and activates the WooCommerce Payments Dev Tools plugin on the site.
  */
 function add_woocommerce_payments_dev_tools() {
-	$woocommerce_payments_dev_tools_plugin_url = 'https://github.com/Automattic/woocommerce-payments-dev-tools-ci/releases/latest/download/woocommerce-payments-dev-tools-trunk.zip';
-	// We install the trunk version of the plugin.
-	$cmd = "wp plugin install $woocommerce_payments_dev_tools_plugin_url --activate";
+	$private_repo_url = get_private_wcpay_dev_tools_zipball_link();
+	$public_repo_url  = 'https://github.com/Automattic/woocommerce-payments-dev-tools-ci/releases/latest/download/woocommerce-payments-dev-tools-trunk.zip';
+
+	$install_url = $private_repo_url ?? $public_repo_url;
+	$cmd         = "wp plugin install $install_url --activate";
 
 	add_filter(
 		'jurassic_ninja_feature_command',

lib/error-stuff.php

@@ -88,7 +88,7 @@ function errors() {
 /**
  * Push an error to the stack of errors that will be shown on the admin notices
  *
- * @param  WP_Error $err An error to be shown in the admin notice.
+ * @param \WP_Error $err An error to be shown in the admin notice.
  */
 function push_error( $err ) {
 	global $jurassic_ninja_errors;