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[Flow] Fix failure due to missing Metro flow types #17187

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hramos
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@hramos hramos commented Dec 13, 2017

Fixes the Flow failure due to an undefined Ast type.

Before:

 $ npm run flow -- check

> react-native@1000.0.0 flow /Users/hramos/git/react-native
> flow "check"

Error: local-cli/__tests__/fs-mock-test.js:27
 27:   beforeEach(() => {
       ^^^^^^^^^^ beforeEach. Could not resolve name

Error: local-cli/__tests__/fs-mock-test.js:53
 53:       expect(content).toEqual('beep');
           ^^^^^^ expect. Could not resolve name

Error: local-cli/__tests__/fs-mock-test.js:88
 88:         expect(content).toEqual('hello, world!');
             ^^^^^^ expect. Could not resolve name

Error: local-cli/__tests__/fs-mock-test.js:100
100:       expect(content).toEqual('hello, world!');
           ^^^^^^ expect. Could not resolve name

Error: node_modules/metro/src/Bundler/util.js.flow:46
 46: ): Ast {
        ^^^ Ast. Could not resolve name

Error: node_modules/metro/src/ModuleGraph/worker/collect-dependencies.js.flow:283
283: const xp = (module.exports = (ast: Ast) =>
                                        ^^^ Ast. Could not resolve name

Error: node_modules/metro/src/assetTransformer.js.flow:29
 29: ): Promise<{ast: Ast}> {
                      ^^^ Ast. Could not resolve name

After

$ npm run flow -- check

> react-native@1000.0.0 flow /Users/hramos/git/react-native
> flow "check"

Error: local-cli/__tests__/fs-mock-test.js:27
 27:   beforeEach(() => {
       ^^^^^^^^^^ beforeEach. Could not resolve name

Error: local-cli/__tests__/fs-mock-test.js:53
 53:       expect(content).toEqual('beep');
           ^^^^^^ expect. Could not resolve name

Error: local-cli/__tests__/fs-mock-test.js:88
 88:         expect(content).toEqual('hello, world!');
             ^^^^^^ expect. Could not resolve name

Error: local-cli/__tests__/fs-mock-test.js:100
100:       expect(content).toEqual('hello, world!');
           ^^^^^^ expect. Could not resolve name

Release Notes

[ GENERAL ] [ BUGFIX] [ .flowconfig ] - Have Flow ignore Metro node_nodules

@hramos
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hramos commented Dec 13, 2017

Hat tip to @skevy who proposed this solution.

@facebook-github-bot facebook-github-bot added the CLA Signed This label is managed by the Facebook bot. Authors need to sign the CLA before a PR can be reviewed. label Dec 13, 2017
@@ -22,6 +22,9 @@
; Ignore polyfills
.*/Libraries/polyfills/.*

; Ignore metro
.*/node_modules/metro/.*
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I think that template is due to be removed anyway.

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Here's the PR that will move the template out: #16579

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Nevermind, this is a separate template (HelloNavigation). Taking a look.

flow/metro.js Outdated
@@ -0,0 +1,18 @@
/**
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This file will get pulled in internally because react-native-github/flow is a lib dir for our xplat .flowconfig at facebook, right? Will this cause a problem?

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Might want to put this in like, an "oss-flow" folder @hramos.

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Ah, yes, this folder is used in the xplat .flowconfig.

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Moved to flow-github, to follow the convention established by the react-native-github folder in xplat.

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Looks good minus my comment here: #17187 (comment)

@elicwhite
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I don't see a file in a flow-github folder. Did you forget to add it after you moved it?

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hramos commented Dec 14, 2017

Added the missing file

@@ -21,6 +21,7 @@
[libs]
node_modules/react-native/Libraries/react-native/react-native-interface.js
node_modules/react-native/flow/
node_modules/react-native/flow-github/
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Do you want to ignore metro from this file too?

@facebook-github-bot facebook-github-bot added the Import Started This pull request has been imported. This does not imply the PR has been approved. label Dec 14, 2017
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@hramos is landing this pull request. If you are a Facebook employee, you can view this diff on Phabricator.

@leethree
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flow-github folder is not exported to npm package

@elicwhite
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Good catch @leethree. I'll make that change.

mathiasbynens pushed a commit to mathiasbynens/react-native that referenced this pull request Jan 13, 2018
Summary:
Fixes the Flow failure due to an undefined Ast type.

Before:

```
 $ npm run flow -- check

> react-native@1000.0.0 flow /Users/hramos/git/react-native
> flow "check"

Error: local-cli/__tests__/fs-mock-test.js:27
 27:   beforeEach(() => {
       ^^^^^^^^^^ beforeEach. Could not resolve name

Error: local-cli/__tests__/fs-mock-test.js:53
 53:       expect(content).toEqual('beep');
           ^^^^^^ expect. Could not resolve name

Error: local-cli/__tests__/fs-mock-test.js:88
 88:         expect(content).toEqual('hello, world!');
             ^^^^^^ expect. Could not resolve name

Error: local-cli/__tests__/fs-mock-test.js:100
100:       expect(content).toEqual('hello, world!');
           ^^^^^^ expect. Could not resolve name

Error: node_modules/metro/src/Bundler/util.js.flow:46
 46: ): Ast {
        ^^^ Ast. Could not resolve name

Error: node_modules/metro/src/ModuleGraph/worker/collect-dependencies.js.flow:283
283: const xp = (module.exports = (ast: Ast) =>
                                        ^^^ Ast. Could not resolve name

Error: node_modules/metro/src/assetTransformer.js.flow:29
 29: ): Promise<{ast: Ast}> {
                      ^^^ Ast. Could not resolve name
```

After

```
$ npm run flow -- check

> react-native@1000.0.0 flow /Users/hramos/git/react-native
> flow "check"

Error: local-cli/__tests__/fs-mock-test.js:27
 27:   beforeEach(() => {
       ^^^^^^^^^^ beforeEach. Could not resolve name

Error: local-cli/__tests__/fs-mock-test.js:53
 53:       expect(content).toEqual('beep');
           ^^^^^^ expect. Could not resolve name

Error: local-cli/__tests__/fs-mock-test.js:88
 88:         expect(content).toEqual('hello, world!');
             ^^^^^^ expect. Could not resolve name

Error: local-cli/__tests__/fs-mock-test.js:100
100:       expect(content).toEqual('hello, world!');
           ^^^^^^ expect. Could not resolve name
```

[ GENERAL ] [ BUGFIX] [ .flowconfig ] - Have Flow ignore Metro node_nodules
Closes facebook#17187

Differential Revision: D6572303

Pulled By: hramos

fbshipit-source-id: aa256b9725970fcc2a6da6578c83e7c0875e3cfd
grabbou pushed a commit to react-native-community/cli that referenced this pull request Sep 26, 2018
Summary:
Fixes the Flow failure due to an undefined Ast type.

Before:

```
 $ npm run flow -- check

> react-native@1000.0.0 flow /Users/hramos/git/react-native
> flow "check"

Error: local-cli/__tests__/fs-mock-test.js:27
 27:   beforeEach(() => {
       ^^^^^^^^^^ beforeEach. Could not resolve name

Error: local-cli/__tests__/fs-mock-test.js:53
 53:       expect(content).toEqual('beep');
           ^^^^^^ expect. Could not resolve name

Error: local-cli/__tests__/fs-mock-test.js:88
 88:         expect(content).toEqual('hello, world!');
             ^^^^^^ expect. Could not resolve name

Error: local-cli/__tests__/fs-mock-test.js:100
100:       expect(content).toEqual('hello, world!');
           ^^^^^^ expect. Could not resolve name

Error: node_modules/metro/src/Bundler/util.js.flow:46
 46: ): Ast {
        ^^^ Ast. Could not resolve name

Error: node_modules/metro/src/ModuleGraph/worker/collect-dependencies.js.flow:283
283: const xp = (module.exports = (ast: Ast) =>
                                        ^^^ Ast. Could not resolve name

Error: node_modules/metro/src/assetTransformer.js.flow:29
 29: ): Promise<{ast: Ast}> {
                      ^^^ Ast. Could not resolve name
```

After

```
$ npm run flow -- check

> react-native@1000.0.0 flow /Users/hramos/git/react-native
> flow "check"

Error: local-cli/__tests__/fs-mock-test.js:27
 27:   beforeEach(() => {
       ^^^^^^^^^^ beforeEach. Could not resolve name

Error: local-cli/__tests__/fs-mock-test.js:53
 53:       expect(content).toEqual('beep');
           ^^^^^^ expect. Could not resolve name

Error: local-cli/__tests__/fs-mock-test.js:88
 88:         expect(content).toEqual('hello, world!');
             ^^^^^^ expect. Could not resolve name

Error: local-cli/__tests__/fs-mock-test.js:100
100:       expect(content).toEqual('hello, world!');
           ^^^^^^ expect. Could not resolve name
```

[ GENERAL ] [ BUGFIX] [ .flowconfig ] - Have Flow ignore Metro node_nodules
Closes facebook/react-native#17187

Differential Revision: D6572303

Pulled By: hramos

fbshipit-source-id: aa256b9725970fcc2a6da6578c83e7c0875e3cfd
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