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[ReactNative] Don't redbox on flow config errors

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This commit is contained in:
Spencer Ahrens 2015-04-09 17:49:20 -07:00
parent 4b9ec6c5f7
commit 4d9f4301ec
1 changed files with 54 additions and 22 deletions
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76
getFlowTypeCheckMiddleware.js
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@ -8,8 +8,11 @@
*/
'use strict';
var chalk = require('chalk');
var exec = require('child_process').exec;
var hasWarned = {};
function getFlowTypeCheckMiddleware(options) {
return function(req, res, next) {
if (options.skipflow) {
@ -18,13 +21,19 @@ function getFlowTypeCheckMiddleware(options) {
if (options.flowroot || options.projectRoots.length === 1) {
var flowroot = options.flowroot || options.projectRoots[0];
} else {
console.warn('flow: No suitable root');
if (!hasWarned.noRoot) {
hasWarned.noRoot = true;
console.warn('flow: No suitable root');
}
return next();
}
exec('command -v flow >/dev/null 2>&1', function(error, stdout) {
if (error) {
console.warn('flow: Skipping because not installed. Install with ' +
'`brew install flow`.');
if (!hasWarned.noFlow) {
hasWarned.noFlow = true;
console.warn(chalk.yellow('flow: Skipping because not installed. Install with ' +
'`brew install flow`.'));
}
return next();
} else {
return doFlowTypecheck(res, flowroot, next);
@ -36,10 +45,19 @@ function getFlowTypeCheckMiddleware(options) {
function doFlowTypecheck(res, flowroot, next) {
var flowCmd = 'cd "' + flowroot + '" && flow --json --timeout 20';
var start = Date.now();
console.log('flow: Running static typechecks.');
exec(flowCmd, function(flowError, stdout) {
// Log start message if flow is slow to let user know something is happening.
var flowSlow = setTimeout(
function() {
console.log(chalk.gray('flow: Running static typechecks.'));
},
500
);
exec(flowCmd, function(flowError, stdout, stderr) {
clearTimeout(flowSlow);
if (!flowError) {
console.log('flow: Typechecks passed (' + (Date.now() - start) + 'ms).');
console.log(chalk.gray(
'flow: Typechecks passed (' + (Date.now() - start) + 'ms).')
);
return next();
} else {
try {
@ -61,24 +79,38 @@ function doFlowTypecheck(res, flowroot, next) {
});
errorNum++;
});
var message = 'Flow found type errors. If you think these are wrong, ' +
'make sure flow is up to date, or disable with --skipflow.';
var error = {
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: errors,
};
console.error(chalk.yellow('flow: Error running command `' + flowCmd +
'`:\n' + JSON.stringify(error))
);
res.writeHead(error.status, {
'Content-Type': 'application/json; charset=UTF-8',
});
res.end(JSON.stringify(error));
} catch (e) {
var message =
'Flow failed to provide parseable output:\n\n`' + stdout + '`';
console.error(message, '\nException: `', e, '`\n\n');
if (stderr.match(/Could not find a \.flowconfig/)) {
if (!hasWarned.noConfig) {
hasWarned.noConfig = true;
console.warn(chalk.yellow('flow: ' + stderr));
}
} else {
if (!hasWarned.brokenFlow) {
hasWarned.brokenFlow = true;
console.warn(chalk.yellow(
'Flow failed to provide parseable output:\n\n`' + stdout +
'`.\n' + 'stderr: `' + stderr + '`'
));
}
}
return next();
}
var error = {
status: 500,
message: message,
type: 'FlowError',
errors: errors,
};
console.error('flow: Error running command `' + flowCmd + '`:\n', error);
res.writeHead(error.status, {
'Content-Type': 'application/json; charset=UTF-8',
});
res.end(JSON.stringify(error));
}
});
}