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var istanbul = require('istanbul'),
ibrik = require('ibrik'),
minimatch = require('minimatch'),
globalSourceCache = require('./sourceCache');
var createCoveragePreprocessor = function(logger, basePath, reporters, coverageReporter) {
var log = logger.create('preprocessor.coverage');
var instrumenterOverrides = (coverageReporter && coverageReporter.instrumenter) || {};
var instrumenters = {istanbul: istanbul, ibrik: ibrik};
var sourceCache = globalSourceCache.getByBasePath(basePath);
// if coverage reporter is not used, do not preprocess the files
if (reporters.indexOf('coverage') === -1) {
return function(content, _, done) {
done(content);
};
}
// check instrumenter override requests
function checkInstrumenters() {
var literal;
for (var pattern in instrumenterOverrides) {
literal = String(instrumenterOverrides[pattern]).toLowerCase();
if (literal !== 'istanbul' && literal !== 'ibrik') {
log.error('Unknown instrumenter: %s', literal);
return false;
}
}
return true;
}
if (!checkInstrumenters()) {
return function(content, _, done) {
return done(1);
};
}
return function(content, file, done) {
log.debug('Processing "%s".', file.originalPath);
var jsPath = file.originalPath.replace(basePath + '/', './');
var instrumenterLiteral = jsPath.match(/\.coffee$/) ? 'ibrik' : 'istanbul';
for (var pattern in instrumenterOverrides) {
if (minimatch(file.originalPath, pattern, {dot: true})) {
instrumenterLiteral = String(instrumenterOverrides[pattern]).toLowerCase();
}
}
var instrumenter = new instrumenters[instrumenterLiteral].Instrumenter();
instrumenter.instrument(content, jsPath, function(err, instrumentedCode) {
if (err) {
log.error('%s\n at %s', err.message, file.originalPath);
}
if (instrumenterLiteral === 'ibrik') {
file.path = file.path.replace(/\.coffee$/, '.js');
}
// remember the actual immediate instrumented JS for given original path
sourceCache[jsPath] = content;
done(instrumentedCode);
});
};
};
createCoveragePreprocessor.$inject = ['logger',
'config.basePath',
'config.reporters',
'config.coverageReporter'];
module.exports = createCoveragePreprocessor;
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