parcel-bundler
Version:
Blazing fast, zero configuration web application bundler
214 lines (169 loc) • 7.18 kB
JavaScript
;
var _interopRequireDefault = require("@babel/runtime/helpers/interopRequireDefault");
var _asyncToGenerator2 = _interopRequireDefault(require("@babel/runtime/helpers/asyncToGenerator"));
function _createForOfIteratorHelper(o, allowArrayLike) { var it; if (typeof Symbol === "undefined" || o[Symbol.iterator] == null) { if (Array.isArray(o) || (it = _unsupportedIterableToArray(o)) || allowArrayLike && o && typeof o.length === "number") { if (it) o = it; var i = 0; var F = function F() {}; return { s: F, n: function n() { if (i >= o.length) return { done: true }; return { done: false, value: o[i++] }; }, e: function e(_e) { throw _e; }, f: F }; } throw new TypeError("Invalid attempt to iterate non-iterable instance.\nIn order to be iterable, non-array objects must have a [Symbol.iterator]() method."); } var normalCompletion = true, didErr = false, err; return { s: function s() { it = o[Symbol.iterator](); }, n: function n() { var step = it.next(); normalCompletion = step.done; return step; }, e: function e(_e2) { didErr = true; err = _e2; }, f: function f() { try { if (!normalCompletion && it.return != null) it.return(); } finally { if (didErr) throw err; } } }; }
function _unsupportedIterableToArray(o, minLen) { if (!o) return; if (typeof o === "string") return _arrayLikeToArray(o, minLen); var n = Object.prototype.toString.call(o).slice(8, -1); if (n === "Object" && o.constructor) n = o.constructor.name; if (n === "Map" || n === "Set") return Array.from(o); if (n === "Arguments" || /^(?:Ui|I)nt(?:8|16|32)(?:Clamped)?Array$/.test(n)) return _arrayLikeToArray(o, minLen); }
function _arrayLikeToArray(arr, len) { if (len == null || len > arr.length) len = arr.length; for (var i = 0, arr2 = new Array(len); i < len; i++) arr2[i] = arr[i]; return arr2; }
const Parser = require('./Parser');
const path = require('path');
const _require = require('@parcel/utils'),
errorUtils = _require.errorUtils;
/**
* A Pipeline composes multiple Asset types together.
*/
class Pipeline {
constructor(options) {
this.options = options;
this.parser = new Parser(options);
}
process(path, isWarmUp) {
var _this = this;
return (0, _asyncToGenerator2.default)(function* () {
let options = _this.options;
if (isWarmUp) {
options = Object.assign({
isWarmUp
}, options);
}
let asset = _this.parser.getAsset(path, options);
let error = null;
let generatedMap = {};
try {
let generated = yield _this.processAsset(asset);
var _iterator = _createForOfIteratorHelper(generated),
_step;
try {
for (_iterator.s(); !(_step = _iterator.n()).done;) {
let rendition = _step.value;
generatedMap[rendition.type] = rendition.value;
}
} catch (err) {
_iterator.e(err);
} finally {
_iterator.f();
}
} catch (err) {
error = errorUtils.errorToJson(err);
error.fileName = path;
}
return {
id: asset.id,
dependencies: Array.from(asset.dependencies.values()),
generated: generatedMap,
sourceMaps: asset.sourceMaps,
error: error,
hash: asset.hash,
cacheData: asset.cacheData
};
})();
}
processAsset(asset) {
var _this2 = this;
return (0, _asyncToGenerator2.default)(function* () {
try {
yield asset.process();
} catch (err) {
throw asset.generateErrorMessage(err);
}
let inputType = path.extname(asset.name).slice(1);
let generated = [];
var _iterator2 = _createForOfIteratorHelper(_this2.iterateRenditions(asset)),
_step2;
try {
for (_iterator2.s(); !(_step2 = _iterator2.n()).done;) {
let rendition = _step2.value;
let type = rendition.type,
value = rendition.value;
if (typeof value !== 'string' || rendition.final) {
generated.push(rendition);
continue;
} // Find an asset type for the rendition type.
// If the asset is not already an instance of this asset type, process it.
let AssetType = _this2.parser.findParser(asset.name.slice(0, -inputType.length) + type, true);
if (!(asset instanceof AssetType)) {
let opts = Object.assign({}, asset.options, {
rendition
});
let subAsset = new AssetType(asset.name, opts);
subAsset.id = asset.id;
subAsset.contents = value;
subAsset.dependencies = asset.dependencies;
subAsset.cacheData = Object.assign(asset.cacheData, subAsset.cacheData);
let processed = yield _this2.processAsset(subAsset);
if (rendition.meta) {
var _iterator4 = _createForOfIteratorHelper(processed),
_step4;
try {
for (_iterator4.s(); !(_step4 = _iterator4.n()).done;) {
let res = _step4.value;
res.meta = rendition.meta;
res.isMain = res.type === subAsset.type;
}
} catch (err) {
_iterator4.e(err);
} finally {
_iterator4.f();
}
}
generated = generated.concat(processed);
} else {
generated.push(rendition);
}
} // Post process. This allows assets a chance to modify the output produced by sub-asset types.
} catch (err) {
_iterator2.e(err);
} finally {
_iterator2.f();
}
try {
generated = yield asset.postProcess(generated);
} catch (err) {
throw asset.generateErrorMessage(err);
}
let hasMap = false;
let sourceMaps = {};
var _iterator3 = _createForOfIteratorHelper(generated),
_step3;
try {
for (_iterator3.s(); !(_step3 = _iterator3.n()).done;) {
let rendition = _step3.value;
if (rendition.map && rendition.type == asset.type) {
sourceMaps[rendition.type] = rendition.map;
hasMap = true;
}
}
} catch (err) {
_iterator3.e(err);
} finally {
_iterator3.f();
}
if (hasMap) {
asset.sourceMaps = sourceMaps;
}
asset.generated = generated;
asset.hash = yield asset.generateHash();
return generated;
})();
}
*iterateRenditions(asset) {
if (Array.isArray(asset.generated)) {
return yield* asset.generated;
}
if (typeof asset.generated === 'string') {
return yield {
type: asset.type,
value: asset.generated
};
} // Backward compatibility support for the old API.
// Assume all renditions are final - don't compose asset types together.
for (let type in asset.generated) {
yield {
type,
value: asset.generated[type],
// for scope hoisting, we need to post process all JS
final: !(type === 'js' && this.options.scopeHoist)
};
}
}
}
module.exports = Pipeline;