Function setupCoverageHooks

lib/internal/util.js:786–803

(dir)

// Setup user-facing NODE_V8_COVERAGE environment variable that writes
// ScriptCoverage objects to a specified directory.
function setupCoverageHooks(dir) {
  const cwd = require('internal/process/execution').tryGetCwd();
  const { resolve } = require('path');
  const coverageDirectory = resolve(cwd, dir);
  const { sourceMapCacheToObject } =
    require('internal/source_map/source_map_cache');

  if (process.features.inspector) {
    internalBinding('profiler').setCoverageDirectory(coverageDirectory);
    internalBinding('profiler').setSourceMapCacheGetter(sourceMapCacheToObject);
  } else {
    process.emitWarning('The inspector is disabled, ' +
                        'coverage could not be collected',
                        'Warning');
    return '';
  }
  return coverageDirectory;
}

// Returns the number of ones in the binary representation of the decimal
// number.