wishthis/node_modules/gulp-uglify/lib/minify.js
2022-01-21 09:28:41 +01:00

79 lines
1.8 KiB
JavaScript

'use strict';
var Buffer = require('safe-buffer').Buffer;
var applySourceMap = require('vinyl-sourcemaps-apply');
var isObject = require('isobject');
var extend = require('extend-shallow');
var createError = require('./create-error');
module.exports = function(uglify, log) {
function setup(opts) {
if (opts && !isObject(opts)) {
log.warn('gulp-uglify expects an object, non-object provided');
opts = {};
}
return extend(
{},
{
output: {}
},
opts
);
}
return function(opts) {
return function(file) {
var options = setup(opts || {});
var hasSourceMaps = Boolean(file.sourceMap);
if (file.isNull()) {
return file;
}
if (file.isStream()) {
throw createError(file, 'Streaming not supported', null);
}
if (hasSourceMaps) {
options.sourceMap = {
filename: file.sourceMap.file,
includeSources: true
};
// UglifyJS generates broken source maps if the input source map
// does not contain mappings.
if (file.sourceMap.mappings) {
options.sourceMap.content = file.sourceMap;
}
}
var fileMap = {};
fileMap[file.relative] = String(file.contents);
var mangled = uglify.minify(fileMap, options);
if (!mangled || mangled.error) {
throw createError(
file,
'unable to minify JavaScript',
mangled && mangled.error
);
}
if (mangled.warnings) {
mangled.warnings.forEach(function(warning) {
log.warn('gulp-uglify [%s]: %s', file.relative, warning);
});
}
file.contents = Buffer.from(mangled.code);
if (hasSourceMaps) {
var sourceMap = JSON.parse(mangled.map);
applySourceMap(file, sourceMap);
}
return file;
};
};
};