Flow 为新项目生成许多错误

Question

Flow 为新项目生成许多错误

Flow 似乎在一个新项目上产生了很多错误。我究竟做错了什么？

我做了什么：

使用创建了一个新的 React Native 项目 react-native init FlowProject
使用 yarn 和 Babel遵循Flow的设置
- yarn add --dev babel-cli babel-preset-flow
- yarn add --dev flow-bin
Ran yarn run flow（.flowconfig 由 init 生成）

这是我得到的错误：

.flowconfig:53 Unsupported option specified! (unsafe.enable_getters_and_setters)
error Command failed with exit code 8.

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现在，如果我删除指定的行（和版本号），我会收到一堆以下两个错误：

Error: node_modules/react-native/Libraries/Inspector/Inspector.js:104
104:       clearTimeout(_hideWait);
                        ^^^^^^^^^ null. This type is incompatible with the expected param type of
733: declare function clearTimeout(timeoutId?: TimeoutID): void;
                                               ^^^^^^^^^ TimeoutID. See lib: /private/tmp/flow/flowlib_171966cc/core.js:733

Error: node_modules/react-native/Libraries/Lists/VirtualizedList.js:1094
1094:         this.props.onEndReachedThreshold * visibleLength / 2;
              ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ undefined. The operand of an arithmetic operation must be a number.

Found 19 errors
error Command failed with exit code 2.

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如果我删除生成的 .flowconfig 文件（见文末），用重新创建它yarn run flow init，然后yarn run flow再次运行，我会收到以下错误（我只是显示这 5 个，它们中的大多数彼此相似）：

Error: node_modules/react-native/Libraries/Animated/src/AnimatedEvent.js:101
101:     if (__DEV__) {
             ^^^^^^^ __DEV__. Could not resolve name

Error: node_modules/react-native/Libraries/Inspector/Inspector.js:104
104:       clearTimeout(_hideWait);
                        ^^^^^^^^^ null. This type is incompatible with the expected param type of
733: declare function clearTimeout(timeoutId?: TimeoutID): void;
                                               ^^^^^^^^^ TimeoutID. See lib: /private/tmp/flow/flowlib_15451c3f/core.js:733

Error: node_modules/react-native/Libraries/Interaction/InteractionManager.js:107
107:           return promise.done(...args);
                      ^^^^^^^^^^^^^^^^^^^^^ call of method `done`. Function cannot be called on
107:           return promise.done(...args);
                      ^^^^^^^^^^^^^^^^^^^^^ property `done` of unknown type

Error: node_modules/react-native/Libraries/Interaction/TaskQueue.js:165
165:       .done();
            ^^^^ property `done`. Property not found in
         v---------
152:     task.gen()
153:       .then(() => {
154:         DEBUG && infoLog(
...:
164:       })
           -^ Promise

Error: node_modules/react-native/Libraries/Lists/VirtualizedList.js:1016
1016:       distanceFromEnd < onEndReachedThreshold * visibleLength &&
                              ^^^^^^^^^^^^^^^^^^^^^ undefined. The operand of an arithmetic operation must be a number.


... 16 more errors (only 50 out of 66 errors displayed)
To see all errors, re-run Flow with --show-all-errors
error Command failed with exit code 2.

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现在我知道我可以告诉 flow 忽略某些文件，但首先，对我来说，flow 给我这些我没有生成的代码的错误似乎很奇怪。我还在 github 问题上看到我们不应该告诉 flow 忽略 node_modules。那么忽略第一个流分析给我们的每个文件的解决方案是什么？

以下是相关文件的列表：

Error node_modules/react-native/Libraries/Inspector/Inspector.js:
Error node_modules/react-native/Libraries/Interaction/InteractionManager.js
Error node_modules/react-native/Libraries/Lists/FlatList.js
Error node_modules/react-native/Libraries/Lists/ViewabilityHelper.js
Error node_modules/react-native/Libraries/Lists/VirtualizedList.js
Error node_modules/react-native/Libraries/Lists/VirtualizedSectionList.js
Error node_modules/react-native/Libraries/StyleSheet/flattenStyle.js

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生成的 .flowconfig 文件

[ignore]
; We fork some components by platform
.*/*[.]android.js

; Ignore "BUCK" generated dirs
<PROJECT_ROOT>/\.buckd/

; Ignore unexpected extra "@providesModule"
.*/node_modules/.*/node_modules/fbjs/.*

; Ignore duplicate module providers
; For RN Apps installed via npm, "Libraries" folder is inside
; "node_modules/react-native" but in the source repo it is in the root
.*/Libraries/react-native/React.js

; Ignore polyfills
.*/Libraries/polyfills/.*

; Ignore metro
.*/node_modules/metro/.*

[include]

[libs]
node_modules/react-native/Libraries/react-native/react-native-interface.js
node_modules/react-native/flow/
node_modules/react-native/flow-github/

[options]
emoji=true

module.system=haste

munge_underscores=true

module.name_mapper='^[./a-zA-Z0-9$_-]+\.\(bmp\|gif\|jpg\|jpeg\|png\|psd\|svg\|webp\|m4v\|mov\|mp4\|mpeg\|mpg\|webm\|aac\|aiff\|caf\|m4a\|mp3\|wav\|html\|pdf\)$' -> 'RelativeImageStub'

module.file_ext=.js
module.file_ext=.jsx
module.file_ext=.json
module.file_ext=.native.js

suppress_type=$FlowIssue
suppress_type=$FlowFixMe
suppress_type=$FlowFixMeProps
suppress_type=$FlowFixMeState

suppress_comment=\\(.\\|\n\\)*\\$FlowFixMe\\($\\|[^(]\\|(\\(<VERSION>\\)? *\\(site=[a-z,_]*react_native[a-z,_]*\\)?)\\)
suppress_comment=\\(.\\|\n\\)*\\$FlowIssue\\((\\(<VERSION>\\)? *\\(site=[a-z,_]*react_native[a-z,_]*\\)?)\\)?:? #[0-9]+
suppress_comment=\\(.\\|\n\\)*\\$FlowFixedInNextDeploy
suppress_comment=\\(.\\|\n\\)*\\$FlowExpectedError

unsafe.enable_getters_and_setters=true

[version]
^0.61.0

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