Make sourcemap flow types non-nullable

Reviewed By: mjesun

Differential Revision: D6185460

fbshipit-source-id: c33bac5f0e70c142d6238043ce8c2996f1d1ee50

packages/metro-bundler/src/DeltaBundler/DeltaTransformer.js

@@ -37,7 +37,7 @@ export type DeltaEntryType =
 export type DeltaEntry = {|
   +code: string,
   +id: number,
-  +map: ?CompactRawMappings,
+  +map: CompactRawMappings,
   +name: string,
   +path: string,
   +source: string,
@@ -284,7 +284,7 @@ class DeltaTransformer extends EventEmitter {
             {
               code,
               id: moduleId,
-              map: null,
+              map: [],
               name,
               source: code,
               path,
@@ -301,7 +301,7 @@ class DeltaTransformer extends EventEmitter {
       append.set(id, {
         code,
         id,
-        map: null,
+        map: [],
         name: 'sourcemap.js',
         path: '/sourcemap.js',
         source: code,
@@ -417,7 +417,7 @@ class DeltaTransformer extends EventEmitter {
   ): Promise<{
     +code: string,
     +dependencyOffsets: ?Array<number>,
-    +map: ?CompactRawMappings,
+    +map: CompactRawMappings,
     +source: string,
   }> {
     if (module.isAsset()) {
@@ -430,7 +430,7 @@ class DeltaTransformer extends EventEmitter {
       return {
         code: asset.code,
         dependencyOffsets: asset.meta.dependencyOffsets,
-        map: undefined,
+        map: [],
         source: '',
       };
     }

packages/metro-bundler/src/JSTransformer/worker/minify.js

@@ -28,7 +28,7 @@ import type {
 
 type ResultWithMap = {
   code: string,
-  map: ?MappingsMap,
+  map: MappingsMap,
 };
 
 function noSourceMap(code: string): string {
@@ -55,14 +55,14 @@ function withSourceMap(
 
 function withRawMappings(
   code: string,
-  map: ?RawMappings,
+  map: RawMappings,
   filename: string,
-): {code: string, map: ?CompactRawMappings} {
+): {code: string, map: CompactRawMappings} {
   const result = withSourceMap(code, map, filename);
 
   return {
     code: result.code,
-    map: result.map ? toRawMappings(result.map).map(compactMapping) : undefined,
+    map: toRawMappings(result.map).map(compactMapping),
   };
 }
 

packages/metro-bundler/src/Resolver/index.js

@@ -230,10 +230,10 @@ class Resolver {
     dependencyPairs: Map<string, string>,
     dependencyOffsets: Array<number>,
     name: string,
-    map: ?CompactRawMappings,
+    map: CompactRawMappings,
     code: string,
     dev?: boolean,
-  }): {code: string, map: ?CompactRawMappings} {
+  }): {code: string, map: CompactRawMappings} {
     if (module.isJSON()) {
       code = `module.exports = ${code}`;
     }