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/*--------------------------------------------------------------------------------------------- | ||
* Copyright (c) Microsoft Corporation. All rights reserved. | ||
* Licensed under the MIT License. See License.txt in the project root for license information. | ||
*--------------------------------------------------------------------------------------------*/ | ||
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'use strict'; | ||
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const { ESLint } = require('eslint'); | ||
const { Transform } = require('stream'); | ||
const { relative } = require('path'); | ||
const fancyLog = require('fancy-log'); | ||
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/** | ||
* @param {Function} action - A function to handle all ESLint results | ||
* @returns {stream} gulp file stream | ||
*/ | ||
function eslint(action) { | ||
const linter = new ESLint(); | ||
const formatter = linter.loadFormatter('compact'); | ||
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const results = []; | ||
results.errorCount = 0; | ||
results.warningCount = 0; | ||
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return transform( | ||
async (file, enc, cb) => { | ||
const filePath = relative(process.cwd(), file.path); | ||
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if (file.isNull()) { | ||
cb(null, file); | ||
return; | ||
} | ||
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if (file.isStream()) { | ||
cb(new Error('vinyl files with Stream contents are not supported')); | ||
return; | ||
} | ||
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try { | ||
// TODO: Should this be checked? | ||
if (await linter.isPathIgnored(filePath)) { | ||
cb(null, file); | ||
return; | ||
} | ||
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const result = (await linter.lintText(file.contents.toString(), { filePath }))[0]; | ||
results.push(result); | ||
results.errorCount += result.errorCount; | ||
results.warningCount += result.warningCount; | ||
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const message = (await formatter).format([result]); | ||
if (message) { | ||
fancyLog(message); | ||
} | ||
cb(null, file); | ||
} catch (error) { | ||
cb(error); | ||
} | ||
}, | ||
(done) => { | ||
try { | ||
action(results); | ||
done(); | ||
} catch (error) { | ||
done(error); | ||
} | ||
}); | ||
} | ||
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function transform(transform, flush) { | ||
return new Transform({ | ||
objectMode: true, | ||
transform, | ||
flush | ||
}); | ||
} | ||
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module.exports = eslint; |
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