Running `flow` inside a brand new project fails

[jergason]

Steps to reproduce:

1. react-native init someproject && cd someproject
2. flow init
3. flow
4. Cry because there are 438 errors.

I am on OS X 10.10.2, iojs 1.6.3, react-native 0.3.10, and flow 0.8.

Here is the JSON from the first few errors:

{
  "passed": false,
  "errors": [
    {
      "message": [
        {
          "descr": "NativeModules\nRequired module not found",
          "code": 0,
          "path": "/Users/jergason/code/flowbreaks/node_modules/react-native/Libraries/ActionSheetIOS/ActionSheetIOS.js",
          "line": 14,
          "endline": 14,
          "start": 29,
          "end": 52
        }
      ]
    },
    {
      "message": [
        {
          "descr": "invariant\nRequired module not found",
          "code": 0,
          "path": "/Users/jergason/code/flowbreaks/node_modules/react-native/Libraries/ActionSheetIOS/ActionSheetIOS.js",
          "line": 16,
          "endline": 16,
          "start": 17,
          "end": 36
        }
      ]
    },
    {
      "message": [
        {
          "descr": "NativeModules\nRequired module not found",
          "code": 0,
          "path": "/Users/jergason/code/flowbreaks/node_modules/react-native/Libraries/AdSupport/AdSupportIOS.js",
          "line": 14,
          "endline": 14,
          "start": 17,
          "end": 40
        }
      ]
    },
    {
      "message": [
        {
          "descr": "NativeModules\nRequired module not found",
          "code": 0,
          "path": "/Users/jergason/code/flowbreaks/node_modules/react-native/Libraries/Animation/AnimationExperimental.js",
          "line": 14,
          "endline": 14,
          "start": 27,
          "end": 50
        }
      ]
    },
    {
      "message": [
        {
          "descr": "AnimationUtils\nRequired module not found",
          "code": 0,
          "path": "/Users/jergason/code/flowbreaks/node_modules/react-native/Libraries/Animation/AnimationExperimental.js",
          "line": 15,
          "endline": 15,
          "start": 22,
          "end": 46
        }
      ]
    },
    {
      "message": [
        {
          "descr": "identifier __DEV__\nUnknown global name",
          "code": 0,
          "path": "/Users/jergason/code/flowbreaks/node_modules/react-native/Libraries/Animation/AnimationExperimental.js",
          "line": 75,
          "endline": 75,
          "start": 5,
          "end": 11
        }
      ]
    },
    {
      "message": [
        {
          "descr": "ReactPropTypes\nRequired module not found",
          "code": 0,
          "path": "/Users/jergason/code/flowbreaks/node_modules/react-native/Libraries/Animation/LayoutAnimation.js",
          "line": 14,
          "endline": 14,
          "start": 17,
          "end": 41
        }
      ]
    },
// etc
  ]
}

[frantic]

We are going to provide a flowconfig with sample app soon. cc @sahrens

[bhosmer]

HI @jergason - so the problem is that flow init writes an empty .flowconfig into the root of the new project directory. (react-native init should instead write one that's set up properly, but per @frantic, that's not happening just yet.)

For now, the workaround is to copy the .flowconfig from the root of react-native into your project directory and tweak it, by replacing the two lines in the [library] section with this one:

node_modules/react-native/Libraries/react-native/react-native-interface.js

That should get you to 0 errors using Flow 0.8.0.

[sthomp]

Im still having issues getting flow to run without errors. After I react-native init hello I can see there is a .flowconfig provided. But when I run flow I see errors. Currently using flow 0.9.2.

{  
   "status":500,
   "message":"Flow found type errors.  If you think these are wrong, make sure your flow bin and .flowconfig are up to date, or disable with --skipflow.",
   "type":"FlowError",
   "errors":[  
      {  
         "description":"E1: function call\nCallable signature not found in",
         "filename":"/Users/thompsons/Code/reactjs/hello/node_modules/react-native/Libraries/AppRegistry/AppRegistry.js",
         "lineNumber":57,
         "column":9
      },
      {  
         "description":"  E1: exports",
         "filename":"/Users/thompsons/Code/reactjs/hello/node_modules/react-native/Libraries/ReactIOS/renderApplication.ios.js",
         "lineNumber":0,
         "column":0
      },
      {  
         "description":"E2: \nFailure(\"internal error: package /Users/thompsons/node_modules/React/package.json not found\")",
         "filename":"/Users/thompsons/Code/reactjs/hello/node_modules/react-native/Libraries/Components/ActivityIndicatorIOS/ActivityIndicatorIOS.ios.js",
         "lineNumber":0,
         "column":0
      },
      {  
         "description":"E3: \nFailure(\"internal error: package /Users/thompsons/node_modules/React/package.json not found\")",
         "filename":"/Users/thompsons/Code/reactjs/hello/node_modules/react-native/Libraries/Components/DatePicker/DatePickerIOS.ios.js",
         "lineNumber":0,
         "column":0
      },
      {  
         "description":"E4: \nFailure(\"internal error: package /Users/thompsons/node_modules/React/package.json not found\")",
         "filename":"/Users/thompsons/Code/reactjs/hello/node_modules/react-native/Libraries/Components/MapView/MapView.js",
         "lineNumber":0,
         "column":0
      },
      {  
         "description":"E5: \nFailure(\"internal error: package /Users/thompsons/node_modules/React/package.json not found\")",
         "filename":"/Users/thompsons/Code/reactjs/hello/node_modules/react-native/Libraries/Components/Navigation/NavigatorIOS.ios.js",
         "lineNumber":0,
         "column":0
      },
      {  
         "description":"E6: \nFailure(\"internal error: package /Users/thompsons/node_modules/React/package.json not found\")",
         "filename":"/Users/thompsons/Code/reactjs/hello/node_modules/react-native/Libraries/Components/ScrollView/ScrollView.js",
         "lineNumber":0,
         "column":0
      },
      {  
         "description":"E7: \nFailure(\"internal error: package /Users/thompsons/node_modules/React/package.json not found\")",
         "filename":"/Users/thompsons/Code/reactjs/hello/node_modules/react-native/Libraries/Components/SliderIOS/SliderIOS.js",
         "lineNumber":0,
         "column":0
      },
      {  
         "description":"E8: \nFailure(\"internal error: package /Users/thompsons/node_modules/React/package.json not found\")",
         "filename":"/Users/thompsons/Code/reactjs/hello/node_modules/react-native/Libraries/Components/StaticRenderer.js",
         "lineNumber":0,
         "column":0
      },
      {  
         "description":"E9: \nFailure(\"internal error: package /Users/thompsons/node_modules/React/package.json not found\")",
         "filename":"/Users/thompsons/Code/reactjs/hello/node_modules/react-native/Libraries/Components/SwitchIOS/SwitchIOS.ios.js",
         "lineNumber":0,
         "column":0
      },
      {  
         "description":"E10: \nFailure(\"internal error: package /Users/thompsons/node_modules/React/package.json not found\")",
         "filename":"/Users/thompsons/Code/reactjs/hello/node_modules/react-native/Libraries/Components/TabBarIOS/TabBarIOS.ios.js",
         "lineNumber":0,
         "column":0
      },
      {  
         "description":"E11: \nFailure(\"internal error: package /Users/thompsons/node_modules/React/package.json not found\")",
         "filename":"/Users/thompsons/Code/reactjs/hello/node_modules/react-native/Libraries/Components/TabBarIOS/TabBarItemIOS.ios.js",
         "lineNumber":0,
         "column":0
      },
      {  
         "description":"E12: \nFailure(\"internal error: package /Users/thompsons/node_modules/React/package.json not found\")",
         "filename":"/Users/thompsons/Code/reactjs/hello/node_modules/react-native/Libraries/Components/TextInput/TextInput.js",
         "lineNumber":0,
         "column":0
      },
      {  
         "description":"E13: \nFailure(\"internal error: package /Users/thompsons/node_modules/React/package.json not found\")",
         "filename":"/Users/thompsons/Code/reactjs/hello/node_modules/react-native/Libraries/Components/Touchable/TouchableBounce.js",
         "lineNumber":0,
         "column":0
      },
      {  
         "description":"E14: \nFailure(\"internal error: package /Users/thompsons/node_modules/React/package.json not found\")",
         "filename":"/Users/thompsons/Code/reactjs/hello/node_modules/react-native/Libraries/Components/Touchable/TouchableWithoutFeedback.js",
         "lineNumber":0,
         "column":0
      },
      {  
         "description":"E15: \nFailure(\"internal error: package /Users/thompsons/node_modules/React/package.json not found\")",
         "filename":"/Users/thompsons/Code/reactjs/hello/node_modules/react-native/Libraries/Components/View/View.js",
         "lineNumber":0,
         "column":0
      },
      {  
         "description":"E16: \nFailure(\"internal error: package /Users/thompsons/node_modules/React/package.json not found\")",
         "filename":"/Users/thompsons/Code/reactjs/hello/node_modules/react-native/Libraries/Components/WebView/WebView.ios.js",
         "lineNumber":0,
         "column":0
      },
      {  
         "description":"E17: \nFailure(\"internal error: package /Users/thompsons/node_modules/React/package.json not found\")",
         "filename":"/Users/thompsons/Code/reactjs/hello/node_modules/react-native/Libraries/Image/Image.ios.js",
         "lineNumber":0,
         "column":0
      },
      {  
         "description":"E18: \nFailure(\"internal error: package /Users/thompsons/node_modules/React/package.json not found\")",
         "filename":"/Users/thompsons/Code/reactjs/hello/node_modules/react-native/Libraries/ReactIOS/renderApplication.ios.js",
         "lineNumber":0,
         "column":0
      },
      {  
         "description":"E19: property propTypes\nProperty not found in",
         "filename":"/Users/thompsons/Code/reactjs/hello/node_modules/react-native/Libraries/ReactIOS/verifyPropTypes.js",
         "lineNumber":28,
         "column":10
      },
      {  
         "description":"  E19: exports",
         "filename":"/Users/thompsons/Code/reactjs/hello/node_modules/react-native/Libraries/Components/View/View.js",
         "lineNumber":0,
         "column":0
      },
      {  
         "description":"E20: \nFailure(\"internal error: package /Users/thompsons/node_modules/React/package.json not found\")",
         "filename":"/Users/thompsons/Code/reactjs/hello/node_modules/react-native/Libraries/Text/Text.js",
         "lineNumber":0,
         "column":0
      },
      {  
         "description":"E21: \nFailure(\"internal error: package /Users/thompsons/node_modules/React/package.json not found\")",
         "filename":"/Users/thompsons/Code/reactjs/hello/node_modules/react-native/Libraries/react-native/react-native.js",
         "lineNumber":0,
         "column":0
      }
   ]
}

[jergason]

The default .flowconfig file isn't correct. See #784 (comment) for an explanation of how to get it running.

[sthomp]

Here is the .flowconfig that react-native generated which matches the comments above:

[ignore]

# We fork some components by platform.
.*/*.web.js
.*/*.android.js

# Some modules have their own node_modules with overlap
.*/node_modules/node-haste/.*

# Ignore react-tools where there are overlaps, but don't ignore anything that
# react-native relies on
.*/node_modules/react-tools/src/vendor/core/ExecutionEnvironment.js
.*/node_modules/react-tools/src/browser/eventPlugins/ResponderEventPlugin.js
.*/node_modules/react-tools/src/browser/ui/React.js
.*/node_modules/react-tools/src/core/ReactInstanceHandles.js
.*/node_modules/react-tools/src/event/EventPropagators.js

# Ignore jest
.*/react-native/node_modules/jest-cli/.*

[include]

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

[options]
module.system=haste

[jasongonzales23]

Bump. Same issue. Using Flow 0.10.0

[jasongonzales23]

uh, wow, I fixed it...?

[libs] should be [library]

Seems like a simple bugfix. Maybe I will dig in to this and fix it?

[christopherdro]

That results in the flow server not being able start.
.flowconfig:23 Unsupported config section: "library"

[jasongonzales23]

Heh, yeah I noticed that too late. All I noticed was that the demo then worked, which I assume is because flow didn't run at all. So, I still don't know how to get flow working in this demo.

But for fun you could try the following instead of [libs]

[kittens]
[pygmygoats]
[ufos]

and they all have the same result!

[christopherdro]

This looks like the same as #912 #938.

The issue is not upgrading flow. Trying using 0.7.0 , or 0.8.0.

[pavelnikolov]

What is the best way to downgrade flow if I have version 0.10.0 installed with homebrew?

[christopherdro]

brew switch flow 0.8.0

If you don't have this version it will display what versions you have access to.

[jasongonzales23]

No joy with 0.9.2, 0.8.0, 0.7.0.