feat(hostRules/matchHost): massage and validate

lib/config/migrations/custom/host-rules-migration.spec.ts

@@ -27,6 +27,7 @@ describe('config/migrations/custom/host-rules-migration', () => {
           { hostName: 'some.domain.com', token: '123test' },
           { endpoint: 'domain.com/', token: '123test' },
           { host: 'some.domain.com', token: '123test' },
+          { host: 'some.domain.com:8080', token: '123test' },
         ],
       } as any,
       {
@@ -58,6 +59,7 @@ describe('config/migrations/custom/host-rules-migration', () => {
           { matchHost: 'some.domain.com', token: '123test' },
           { matchHost: 'https://domain.com/', token: '123test' },
           { matchHost: 'some.domain.com', token: '123test' },
+          { matchHost: 'https://some.domain.com:8080', token: '123test' },
         ],
       },
     );

lib/config/migrations/custom/host-rules-migration.ts

@@ -94,6 +94,8 @@ function validateHostRule(rule: LegacyHostRule & HostRule): void {
 function massageUrl(url: string): string {
   if (!url.includes('://') && url.includes('/')) {
     return 'https://' + url;
+  } else if (!url.includes('://') && url.includes(':')) {
+    return 'https://' + url;
   } else {
     return url;
   }

lib/config/validation.spec.ts

@@ -1134,6 +1134,48 @@ describe('config/validation', () => {
       ]);
     });
 
+    it('errors if invalid matchHost values in hostRules', async () => {
+      GlobalConfig.set({ allowedHeaders: ['X-*'] });
+
+      const config = {
+        hostRules: [
+          {
+            matchHost: '://',
+            token: 'token',
+          },
+          {
+            matchHost: '',
+            token: 'token',
+          },
+          {
+            matchHost: undefined,
+            token: 'token',
+          },
+          {
+            hostType: 'github',
+            token: 'token',
+          },
+        ],
+      };
+      const { errors } = await configValidation.validateConfig('repo', config);
+      expect(errors).toMatchObject([
+        {
+          topic: 'Configuration Error',
+          message:
+            'Configuration option `hostRules[2].matchHost` should be a string',
+        },
+        {
+          topic: 'Configuration Error',
+          message:
+            'Invalid value for hostRules matchHost. It cannot be an empty string.',
+        },
+        {
+          topic: 'Configuration Error',
+          message: 'hostRules matchHost `://` is not a valid URL.',
+        },
+      ]);
+    });
+
     it('errors if forbidden header in hostRules', async () => {
       GlobalConfig.set({ allowedHeaders: ['X-*'] });
 

lib/config/validation.ts

@@ -814,6 +814,25 @@ export async function validateConfig(
           ? (config.allowedHeaders as string[]) ?? []
           : GlobalConfig.get('allowedHeaders', []);
       for (const rule of val as HostRule[]) {
+        if (is.nonEmptyString(rule.matchHost)) {
+          if (rule.matchHost.includes('://')) {
+            try {
+              new URL(rule.matchHost);
+            } catch (err) {
+              errors.push({
+                topic: 'Configuration Error',
+                message: `hostRules matchHost \`${rule.matchHost}\` is not a valid URL.`,
+              });
+            }
+          }
+        } else if (is.emptyString(rule.matchHost)) {
+          errors.push({
+            topic: 'Configuration Error',
+            message:
+              'Invalid value for hostRules matchHost. It cannot be an empty string.',
+          });
+        }
+
         if (!rule.headers) {
           continue;
         }