Pre-suppress unused-promise lint errors in xplat/js (#36590)

Summary:
X-link: facebook/react-native#36590

Pre-suppress unused-promise lint errors in xplat/js. The next diff enables the lint.

See https://flow.org/en/docs/linting/rule-reference/#toc-unused-promise for more details.

Changelog: [Internal]

drop-conflicts
bypass-lint

Reviewed By: pieterv

Differential Revision: D43967290

fbshipit-source-id: f36242a732dbc18bf7482adfb46ca2b77e1b1493

packages/buck-worker-tool/src/worker-tool.js

@@ -104,6 +104,7 @@ function buckWorker(commands: Commands): any {
 
     if (response.type === 'handshake') {
       if (JS_WORKER_TOOL_CPU_PROFILE) {
+        // $FlowFixMe[unused-promise]
         startProfiling().then(() => writer.write(response));
       } else {
         writer.write(response);
@@ -164,6 +165,7 @@ function buckWorker(commands: Commands): any {
       return;
     }
     ended = true;
+    // $FlowFixMe[unused-promise]
     stopProfilingAndWrite(JS_WORKER_TOOL_NAME).then(() => writer.end());
   }
   reader.on('data', handleHandshake);
@@ -222,6 +224,7 @@ function readArgsAndExecCommand(
     if (commands.hasOwnProperty(commandName)) {
       const command = commands[commandName];
       const commandSpecificConsole = new Console(stdout, stderr);
+      // $FlowFixMe[unused-promise]
       execCommand(
         command,
         commandName,

packages/metro-cache/src/__tests__/Cache-test.js

@@ -87,6 +87,7 @@ describe('Cache', () => {
     store2.get.mockImplementation(() => 'hit!');
 
     // Get and set. Set should only affect store 1, not 2 (hit) and 3 (after).
+    // $FlowFixMe[unused-promise]
     cache.get(key);
     cache.set(key);
 

packages/metro-file-map/src/Watcher.js

@@ -318,6 +318,7 @@ export class Watcher extends EventEmitter {
     this._pendingHealthChecks.delete(basename);
     // Chain a deletion to the creation promise (which may not have even settled yet!),
     // don't await it, and swallow errors. This is just best-effort cleanup.
+    // $FlowFixMe[unused-promise]
     creationPromise.then(() =>
       fs.promises.unlink(healthCheckPath).catch(() => {}),
     );

packages/metro-file-map/src/index.js

@@ -779,6 +779,7 @@ export default class HasteMap extends EventEmitter {
     const worker = this._worker;
 
     if (worker && typeof worker.end === 'function') {
+      // $FlowFixMe[unused-promise]
       worker.end();
     }
 
@@ -1085,6 +1086,7 @@ export default class HasteMap extends EventEmitter {
         if (!this._watcher) {
           return;
         }
+        // $FlowFixMe[unused-promise]
         this._watcher
           .checkHealth(this._options.healthCheck.timeout)
           .then(result => {

packages/metro-inspector-proxy/src/Device.js

@@ -270,6 +270,7 @@ class Device {
 
       if (this._debuggerConnection) {
         // Wrapping just to make flow happy :)
+        // $FlowFixMe[unused-promise]
         this._processMessageFromDevice(
           parsedPayload,
           this._debuggerConnection,

packages/metro-symbolicate/src/index.js

@@ -12,4 +12,5 @@
 
 'use strict';
 
+// $FlowFixMe[unused-promise]
 require('./symbolicate.js')().then(code => process.exit(code));

packages/metro/src/DeltaBundler/Transformer.js

@@ -165,6 +165,7 @@ class Transformer {
   }
 
   end(): void {
+    // $FlowFixMe[unused-promise]
     this._workerFarm.kill();
   }
 }

packages/metro/src/IncrementalBundler.js

@@ -80,6 +80,7 @@ class IncrementalBundler {
 
   end(): void {
     this._deltaBundler.end();
+    // $FlowFixMe[unused-promise]
     this._bundler.end();
   }
 

packages/metro/src/cli.js

@@ -20,4 +20,5 @@ try {
 const {attachMetroCli} = require('./index');
 const yargs = require('yargs');
 
+// $FlowFixMe[unused-promise]
 attachMetroCli(yargs.demandCommand(1)).argv;

packages/metro/src/lib/__tests__/debounceAsyncQueue-test.js

@@ -17,8 +17,11 @@ describe('debounceAsyncQueue', () => {
   it('debounces calls', async () => {
     const fn = jest.fn();
     const debounced = debounceAsyncQueue<void>(fn, 50);
+    // $FlowFixMe[unused-promise]
     debounced();
+    // $FlowFixMe[unused-promise]
     debounced();
+    // $FlowFixMe[unused-promise]
     debounced();
     expect(fn).toHaveBeenCalledTimes(0);
     jest.runAllTimers();

packages/metro/src/node-haste/DependencyGraph.js

@@ -279,6 +279,7 @@ class DependencyGraph extends EventEmitter {
   }
 
   end() {
+    // $FlowFixMe[unused-promise]
     this._haste.end();
   }
 

packages/metro/src/shared/output/RamBundle/as-assets.js

@@ -62,6 +62,7 @@ function saveAsAssets(
         writeMagicFlagFile(modulesDir),
       ]),
   );
+  // $FlowFixMe[unused-promise]
   writeUnbundle.then(() => log('Done writing unbundle output'));
 
   if (sourcemapOutput) {

packages/metro/src/shared/output/RamBundle/write-sourcemap.js

@@ -23,6 +23,7 @@ function writeSourcemap(
   }
   log('Writing sourcemap output to:', fileName);
   const writeMap = writeFile(fileName, contents, null);
+  // $FlowFixMe[unused-promise]
   writeMap.then(() => log('Done writing sourcemap output'));
   return writeMap;
 }