.ci/eslint-formatter.js

// Copyright 2022 The Fuchsia Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
const path = require('path');

const rootDir = path.resolve(__dirname, '..');

function byRule(messages) {
  const rules = new Map();

  for (const msg of messages) {
    let msgList = rules.get(msg.ruleId);
    if (!msgList) {
      msgList = [];
      rules.set(msg.ruleId, msgList);
    }
    msgList.push(msg);
  }

  return rules;
}

function formatMessage({ruleId, severity, message, line, column}, file) {
  const tag = severity >= 2 ? 'error' : 'failure';
  const type = severity >= 2 ? 'Error' : 'Warning';
  return `      <${tag} message="${message.replace(/"/g, '&quot;')}" type="lint">
<![CDATA[${file}:${line}:${column} - ${type}: ${message}

(${ruleId})]]>
      </${tag}>`;
}

// NB(sollyross): we *cannot* have a test suite per filename -- the way the
// test viewer displays suite names is as if they're java-style class names
// (x.y.ClassName), and therefore would only ever display `ts`, which is not
// helpful.  otoh, testcase names are displayed in full

module.exports = function(results, context) {
  const suites = results.map((file) => {
    const fileName = path.relative(rootDir, file.filePath);
    let cases = file.messages.map((inst) => formatMessage(inst, fileName));
    return `  <testcase name="${fileName}" classname="eslint">
${cases.join("\n")}
  </testcase>`
  });

  const numErrs = results.reduce(
    (total, file) => total + file.messages.filter((msg) => msg.severity >= 2).length,
    0
  );
  const numOther = results.reduce(
    (total, file) => total + file.messages.filter((msg) => msg.severity == 1).length,
    0
  );
  return `
<testsuites>
<testsuite name="eslint" tests="${results.length}" errors="${numErrs}" failures="${numOther}">
${suites.join("\n")}
</testsuite>
</testsuites>
`
};