Pass github enterprise base url, derive urls for authentication

app-config.yaml

@@ -48,15 +48,9 @@ auth:
         clientSecret:
           $secret:
             env: AUTH_GITHUB_CLIENT_SECRET
-        authorizationURL: 
+        enterpriseInstanceURL: 
           $secret:
-            env: AUTH_GITHUB_AUTHORIZATION_URL
-        tokenURL:
-          $secret:
-            env: AUTH_GITHUB_TOKEN_URL
-        userProfileUrl:
-          $secret:
-            env: AUTH_GITHUB_USER_PROFILE_URL
+            env: AUTH_GITHUB_ENTERPRISE_INSTANCE_URL
     gitlab:
       development:
         appOrigin: "http://localhost:3000/"

plugins/auth-backend/README.md

@@ -37,9 +37,7 @@ for github enterprise:
 ```bash
 export AUTH_GITHUB_CLIENT_ID=x
 export AUTH_GITHUB_CLIENT_SECRET=x
-export AUTH_GITHUB_AUTHORIZATION_URL=https://ENTERPRISE_INSTANCE_URL/login/oauth/authorize
-export AUTH_GITHUB_TOKEN_URL=https://ENTERPRISE_INSTANCE_URL/login/oauth/access_token
-export AUTH_GITHUB_USER_PROFILE_URL=https://ENTERPRISE_INSTANCE_URL/api/v3/user
+export AUTH_GITHUB_ENTERPRISE_INSTANCE_URL=https://x
 ```
 
 ### Gitlab

plugins/auth-backend/src/providers/github/provider.ts

@@ -136,9 +136,18 @@ export function createGithubProvider(
   const appOrigin = envConfig.getString('appOrigin');
   const clientID = envConfig.getString('clientId');
   const clientSecret = envConfig.getString('clientSecret');
-  const authorizationURL = envConfig.getOptionalString('authorizationURL');
-  const tokenURL = envConfig.getOptionalString('tokenURL');
-  const userProfileURL = envConfig.getOptionalString('userProfileURL');
+  const enterpriseInstanceUrl = envConfig.getOptionalString(
+    'enterpriseInstanceURL',
+  );
+  const authorizationURL = enterpriseInstanceUrl
+    ? `${enterpriseInstanceUrl}/login/oauth/authorize`
+    : undefined;
+  const tokenURL = enterpriseInstanceUrl
+    ? `${enterpriseInstanceUrl}/login/oauth/access_token`
+    : undefined;
+  const userProfileURL = enterpriseInstanceUrl
+    ? `${enterpriseInstanceUrl}/api/v3/user`
+    : undefined;
   const callbackURL = `${baseUrl}/${providerId}/handler/frame?env=${env}`;
 
   const opts = {