warn if cannot find matching version for a library

Author: TMisiukiewicz

Diff for: packages/cli-tools/package.json

@@ -7,7 +7,7 @@
     "access": "public"
   },
   "dependencies": {
-    "@react-native-community/cli-doctor": "12.0.0-alpha.7",
+    "@react-native-community/cli-doctor": "12.0.0-alpha.11",
     "appdirsjs": "^1.2.4",
     "chalk": "^4.1.2",
     "find-up": "^5.0.0",

Diff for: packages/cli-tools/src/resolveTransitiveDeps.ts

@@ -306,7 +306,16 @@ async function getPackagesVersion(
       ranges,
       availableVersions,
     );
-    workingVersions[packageName] = workingVersion;
+
+    if (workingVersion !== null) {
+      workingVersions[packageName] = workingVersion;
+    } else {
+      logger.warn(
+        `Could not find a version that matches all ranges for ${chalk.bold(
+          packageName,
+        )}. Please resolve this issue manually.`,
+      );
+    }
   }
 
   return workingVersions;

Diff for: packages/cli/src/index.ts

@@ -41,6 +41,7 @@ const handleError = (err: Error) => {
   }
   process.exit(1);
 };
+
 function printExamples(examples: Command['examples']) {
   let output: string[] = [];
 
@@ -172,7 +173,6 @@ async function setupAndRun() {
   }
 
   let config: Config | undefined;
-
   try {
     config = loadConfig();