fix: Throw error when invalid port is used (#188)

* fix: Throw error when invalid port is used

* fix: show actual wrong input value

Author: christianalfoni

src/bin/commands/build.ts

@@ -98,9 +98,49 @@ export const buildCommand: yargs.CommandModule<
         describe: "Path to the project that we'll create a snapshot from",
         type: "string",
         demandOption: "Path to the project is required",
+      })
+      .check((argv) => {
+        // Validate ports parameter - ensure all values are valid numbers
+        if (argv.ports && argv.ports.length > 0) {
+          const invalidPortsWithOriginal: string[] = [];
+          
+          // Get the original arguments to show what the user actually typed
+          const originalArgs = process.argv;
+          const portArgIndices: number[] = [];
+          
+          // Find all --ports arguments in the original command
+          originalArgs.forEach((arg, i) => {
+            if (arg === '--ports' && i + 1 < originalArgs.length) {
+              portArgIndices.push(i + 1);
+            }
+          });
+          
+          argv.ports.forEach((port, i) => {
+            const isInvalid = !Number.isInteger(port) ||
+              port <= 0 ||
+              port > 65535 ||
+              !Number.isFinite(port);
+              
+            if (isInvalid) {
+              // Try to get the original input, fallback to the parsed value
+              const originalInput = portArgIndices[i] ? originalArgs[portArgIndices[i]] : String(port);
+              invalidPortsWithOriginal.push(originalInput);
+            }
+          });
+          
+          if (invalidPortsWithOriginal.length > 0) {
+            throw new Error(
+              `Invalid port value(s): ${invalidPortsWithOriginal.join(
+                ", "
+              )}. Ports must be integers between 1 and 65535.`
+            );
+          }
+        }
+        return true;
       }),
 
   handler: async (argv) => {
+
     const apiKey = getInferredApiKey();
     const api = new API({ apiKey, instrumentation: instrumentedFetch });
     const sdk = new CodeSandbox(apiKey);