@angular-devkit/build-angular
Version:
Angular Webpack Build Facade
289 lines • 33.4 kB
JavaScript
;
/**
* @license
* Copyright Google LLC All Rights Reserved.
*
* Use of this source code is governed by an MIT-style license that can be
* found in the LICENSE file at https://angular.io/license
*/
Object.defineProperty(exports, "__esModule", { value: true });
exports.checkThresholds = exports.checkBudgets = exports.calculateThresholds = exports.ThresholdSeverity = void 0;
const schema_1 = require("../builders/browser/schema");
const stats_1 = require("../tools/webpack/utils/stats");
var ThresholdType;
(function (ThresholdType) {
ThresholdType["Max"] = "maximum";
ThresholdType["Min"] = "minimum";
})(ThresholdType || (ThresholdType = {}));
var ThresholdSeverity;
(function (ThresholdSeverity) {
ThresholdSeverity["Warning"] = "warning";
ThresholdSeverity["Error"] = "error";
})(ThresholdSeverity || (exports.ThresholdSeverity = ThresholdSeverity = {}));
function* calculateThresholds(budget) {
if (budget.maximumWarning) {
yield {
limit: calculateBytes(budget.maximumWarning, budget.baseline, 1),
type: ThresholdType.Max,
severity: ThresholdSeverity.Warning,
};
}
if (budget.maximumError) {
yield {
limit: calculateBytes(budget.maximumError, budget.baseline, 1),
type: ThresholdType.Max,
severity: ThresholdSeverity.Error,
};
}
if (budget.minimumWarning) {
yield {
limit: calculateBytes(budget.minimumWarning, budget.baseline, -1),
type: ThresholdType.Min,
severity: ThresholdSeverity.Warning,
};
}
if (budget.minimumError) {
yield {
limit: calculateBytes(budget.minimumError, budget.baseline, -1),
type: ThresholdType.Min,
severity: ThresholdSeverity.Error,
};
}
if (budget.warning) {
yield {
limit: calculateBytes(budget.warning, budget.baseline, -1),
type: ThresholdType.Min,
severity: ThresholdSeverity.Warning,
};
yield {
limit: calculateBytes(budget.warning, budget.baseline, 1),
type: ThresholdType.Max,
severity: ThresholdSeverity.Warning,
};
}
if (budget.error) {
yield {
limit: calculateBytes(budget.error, budget.baseline, -1),
type: ThresholdType.Min,
severity: ThresholdSeverity.Error,
};
yield {
limit: calculateBytes(budget.error, budget.baseline, 1),
type: ThresholdType.Max,
severity: ThresholdSeverity.Error,
};
}
}
exports.calculateThresholds = calculateThresholds;
/**
* Calculates the sizes for bundles in the budget type provided.
*/
function calculateSizes(budget, stats) {
if (budget.type === schema_1.Type.AnyComponentStyle) {
// Component style size information is not available post-build, this must
// be checked mid-build via the `AnyComponentStyleBudgetChecker` plugin.
throw new Error('Can not calculate size of AnyComponentStyle. Use `AnyComponentStyleBudgetChecker` instead.');
}
const calculatorMap = {
all: AllCalculator,
allScript: AllScriptCalculator,
any: AnyCalculator,
anyScript: AnyScriptCalculator,
bundle: BundleCalculator,
initial: InitialCalculator,
};
const ctor = calculatorMap[budget.type];
const { chunks, assets } = stats;
if (!chunks) {
throw new Error('Webpack stats output did not include chunk information.');
}
if (!assets) {
throw new Error('Webpack stats output did not include asset information.');
}
const calculator = new ctor(budget, chunks, assets);
return calculator.calculate();
}
class Calculator {
constructor(budget, chunks, assets) {
this.budget = budget;
this.chunks = chunks;
this.assets = assets;
}
/** Calculates the size of the given chunk for the provided build type. */
calculateChunkSize(chunk) {
// No differential builds, get the chunk size by summing its assets.
if (!chunk.files) {
return 0;
}
return chunk.files
.filter((file) => !file.endsWith('.map'))
.map((file) => {
const asset = this.assets.find((asset) => asset.name === file);
if (!asset) {
throw new Error(`Could not find asset for file: ${file}`);
}
return asset.size;
})
.reduce((l, r) => l + r, 0);
}
getAssetSize(asset) {
return asset.size;
}
}
/**
* A named bundle.
*/
class BundleCalculator extends Calculator {
calculate() {
const budgetName = this.budget.name;
if (!budgetName) {
return [];
}
const size = this.chunks
.filter((chunk) => chunk?.names?.includes(budgetName))
.map((chunk) => this.calculateChunkSize(chunk))
.reduce((l, r) => l + r, 0);
return [{ size, label: this.budget.name }];
}
}
/**
* The sum of all initial chunks (marked as initial).
*/
class InitialCalculator extends Calculator {
calculate() {
return [
{
label: `bundle initial`,
size: this.chunks
.filter((chunk) => chunk.initial)
.map((chunk) => this.calculateChunkSize(chunk))
.reduce((l, r) => l + r, 0),
},
];
}
}
/**
* The sum of all the scripts portions.
*/
class AllScriptCalculator extends Calculator {
calculate() {
const size = this.assets
.filter((asset) => asset.name.endsWith('.js'))
.map((asset) => this.getAssetSize(asset))
.reduce((total, size) => total + size, 0);
return [{ size, label: 'total scripts' }];
}
}
/**
* All scripts and assets added together.
*/
class AllCalculator extends Calculator {
calculate() {
const size = this.assets
.filter((asset) => !asset.name.endsWith('.map'))
.map((asset) => this.getAssetSize(asset))
.reduce((total, size) => total + size, 0);
return [{ size, label: 'total' }];
}
}
/**
* Any script, individually.
*/
class AnyScriptCalculator extends Calculator {
calculate() {
return this.assets
.filter((asset) => asset.name.endsWith('.js'))
.map((asset) => ({
size: this.getAssetSize(asset),
label: asset.name,
}));
}
}
/**
* Any script or asset (images, css, etc).
*/
class AnyCalculator extends Calculator {
calculate() {
return this.assets
.filter((asset) => !asset.name.endsWith('.map'))
.map((asset) => ({
size: this.getAssetSize(asset),
label: asset.name,
}));
}
}
/**
* Calculate the bytes given a string value.
*/
function calculateBytes(input, baseline, factor = 1) {
const matches = input.match(/^\s*(\d+(?:\.\d+)?)\s*(%|(?:[mM]|[kK]|[gG])?[bB])?\s*$/);
if (!matches) {
return NaN;
}
const baselineBytes = (baseline && calculateBytes(baseline)) || 0;
let value = Number(matches[1]);
switch (matches[2] && matches[2].toLowerCase()) {
case '%':
value = (baselineBytes * value) / 100;
break;
case 'kb':
value *= 1024;
break;
case 'mb':
value *= 1024 * 1024;
break;
case 'gb':
value *= 1024 * 1024 * 1024;
break;
}
if (baselineBytes === 0) {
return value;
}
return baselineBytes + value * factor;
}
function* checkBudgets(budgets, webpackStats) {
// Ignore AnyComponentStyle budgets as these are handled in `AnyComponentStyleBudgetChecker`.
const computableBudgets = budgets.filter((budget) => budget.type !== schema_1.Type.AnyComponentStyle);
for (const budget of computableBudgets) {
const sizes = calculateSizes(budget, webpackStats);
for (const { size, label } of sizes) {
yield* checkThresholds(calculateThresholds(budget), size, label);
}
}
}
exports.checkBudgets = checkBudgets;
function* checkThresholds(thresholds, size, label) {
for (const threshold of thresholds) {
switch (threshold.type) {
case ThresholdType.Max: {
if (size <= threshold.limit) {
continue;
}
const sizeDifference = (0, stats_1.formatSize)(size - threshold.limit);
yield {
severity: threshold.severity,
label,
message: `${label} exceeded maximum budget. Budget ${(0, stats_1.formatSize)(threshold.limit)} was not met by ${sizeDifference} with a total of ${(0, stats_1.formatSize)(size)}.`,
};
break;
}
case ThresholdType.Min: {
if (size >= threshold.limit) {
continue;
}
const sizeDifference = (0, stats_1.formatSize)(threshold.limit - size);
yield {
severity: threshold.severity,
label,
message: `${label} failed to meet minimum budget. Budget ${(0, stats_1.formatSize)(threshold.limit)} was not met by ${sizeDifference} with a total of ${(0, stats_1.formatSize)(size)}.`,
};
break;
}
default: {
throw new Error(`Unexpected threshold type: ${ThresholdType[threshold.type]}`);
}
}
}
}
exports.checkThresholds = checkThresholds;
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* @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport { StatsAsset, StatsChunk, StatsCompilation } from 'webpack';\nimport { Budget, Type } from '../builders/browser/schema';\nimport { formatSize } from '../tools/webpack/utils/stats';\n\ninterface Size {\n  size: number;\n  label?: string;\n}\n\ninterface Threshold {\n  limit: number;\n  type: ThresholdType;\n  severity: ThresholdSeverity;\n}\n\nenum ThresholdType {\n  Max = 'maximum',\n  Min = 'minimum',\n}\n\nexport enum ThresholdSeverity {\n  Warning = 'warning',\n  Error = 'error',\n}\n\nexport interface BudgetCalculatorResult {\n  severity: ThresholdSeverity;\n  message: string;\n  label?: string;\n}\n\nexport function* calculateThresholds(budget: Budget): IterableIterator<Threshold> {\n  if (budget.maximumWarning) {\n    yield {\n      limit: calculateBytes(budget.maximumWarning, budget.baseline, 1),\n      type: ThresholdType.Max,\n      severity: ThresholdSeverity.Warning,\n    };\n  }\n\n  if (budget.maximumError) {\n    yield {\n      limit: calculateBytes(budget.maximumError, budget.baseline, 1),\n      type: ThresholdType.Max,\n      severity: ThresholdSeverity.Error,\n    };\n  }\n\n  if (budget.minimumWarning) {\n    yield {\n      limit: calculateBytes(budget.minimumWarning, budget.baseline, -1),\n      type: ThresholdType.Min,\n      severity: ThresholdSeverity.Warning,\n    };\n  }\n\n  if (budget.minimumError) {\n    yield {\n      limit: calculateBytes(budget.minimumError, budget.baseline, -1),\n      type: ThresholdType.Min,\n      severity: ThresholdSeverity.Error,\n    };\n  }\n\n  if (budget.warning) {\n    yield {\n      limit: calculateBytes(budget.warning, budget.baseline, -1),\n      type: ThresholdType.Min,\n      severity: ThresholdSeverity.Warning,\n    };\n\n    yield {\n      limit: calculateBytes(budget.warning, budget.baseline, 1),\n      type: ThresholdType.Max,\n      severity: ThresholdSeverity.Warning,\n    };\n  }\n\n  if (budget.error) {\n    yield {\n      limit: calculateBytes(budget.error, budget.baseline, -1),\n      type: ThresholdType.Min,\n      severity: ThresholdSeverity.Error,\n    };\n\n    yield {\n      limit: calculateBytes(budget.error, budget.baseline, 1),\n      type: ThresholdType.Max,\n      severity: ThresholdSeverity.Error,\n    };\n  }\n}\n\n/**\n * Calculates the sizes for bundles in the budget type provided.\n */\nfunction calculateSizes(budget: Budget, stats: StatsCompilation): Size[] {\n  if (budget.type === Type.AnyComponentStyle) {\n    // Component style size information is not available post-build, this must\n    // be checked mid-build via the `AnyComponentStyleBudgetChecker` plugin.\n    throw new Error(\n      'Can not calculate size of AnyComponentStyle. Use `AnyComponentStyleBudgetChecker` instead.',\n    );\n  }\n\n  type NonComponentStyleBudgetTypes = Exclude<Budget['type'], Type.AnyComponentStyle>;\n  type CalculatorTypes = {\n    new (budget: Budget, chunks: StatsChunk[], assets: StatsAsset[]): Calculator;\n  };\n  const calculatorMap: Record<NonComponentStyleBudgetTypes, CalculatorTypes> = {\n    all: AllCalculator,\n    allScript: AllScriptCalculator,\n    any: AnyCalculator,\n    anyScript: AnyScriptCalculator,\n    bundle: BundleCalculator,\n    initial: InitialCalculator,\n  };\n\n  const ctor = calculatorMap[budget.type];\n  const { chunks, assets } = stats;\n  if (!chunks) {\n    throw new Error('Webpack stats output did not include chunk information.');\n  }\n  if (!assets) {\n    throw new Error('Webpack stats output did not include asset information.');\n  }\n\n  const calculator = new ctor(budget, chunks, assets);\n\n  return calculator.calculate();\n}\n\nabstract class Calculator {\n  constructor(\n    protected budget: Budget,\n    protected chunks: StatsChunk[],\n    protected assets: StatsAsset[],\n  ) {}\n\n  abstract calculate(): Size[];\n\n  /** Calculates the size of the given chunk for the provided build type. */\n  protected calculateChunkSize(chunk: StatsChunk): number {\n    // No differential builds, get the chunk size by summing its assets.\n    if (!chunk.files) {\n      return 0;\n    }\n\n    return chunk.files\n      .filter((file) => !file.endsWith('.map'))\n      .map((file) => {\n        const asset = this.assets.find((asset) => asset.name === file);\n        if (!asset) {\n          throw new Error(`Could not find asset for file: ${file}`);\n        }\n\n        return asset.size;\n      })\n      .reduce((l, r) => l + r, 0);\n  }\n\n  protected getAssetSize(asset: StatsAsset): number {\n    return asset.size;\n  }\n}\n\n/**\n * A named bundle.\n */\nclass BundleCalculator extends Calculator {\n  calculate() {\n    const budgetName = this.budget.name;\n    if (!budgetName) {\n      return [];\n    }\n\n    const size = this.chunks\n      .filter((chunk) => chunk?.names?.includes(budgetName))\n      .map((chunk) => this.calculateChunkSize(chunk))\n      .reduce((l, r) => l + r, 0);\n\n    return [{ size, label: this.budget.name }];\n  }\n}\n\n/**\n * The sum of all initial chunks (marked as initial).\n */\nclass InitialCalculator extends Calculator {\n  calculate() {\n    return [\n      {\n        label: `bundle initial`,\n        size: this.chunks\n          .filter((chunk) => chunk.initial)\n          .map((chunk) => this.calculateChunkSize(chunk))\n          .reduce((l, r) => l + r, 0),\n      },\n    ];\n  }\n}\n\n/**\n * The sum of all the scripts portions.\n */\nclass AllScriptCalculator extends Calculator {\n  calculate() {\n    const size = this.assets\n      .filter((asset) => asset.name.endsWith('.js'))\n      .map((asset) => this.getAssetSize(asset))\n      .reduce((total: number, size: number) => total + size, 0);\n\n    return [{ size, label: 'total scripts' }];\n  }\n}\n\n/**\n * All scripts and assets added together.\n */\nclass AllCalculator extends Calculator {\n  calculate() {\n    const size = this.assets\n      .filter((asset) => !asset.name.endsWith('.map'))\n      .map((asset) => this.getAssetSize(asset))\n      .reduce((total: number, size: number) => total + size, 0);\n\n    return [{ size, label: 'total' }];\n  }\n}\n\n/**\n * Any script, individually.\n */\nclass AnyScriptCalculator extends Calculator {\n  calculate() {\n    return this.assets\n      .filter((asset) => asset.name.endsWith('.js'))\n      .map((asset) => ({\n        size: this.getAssetSize(asset),\n        label: asset.name,\n      }));\n  }\n}\n\n/**\n * Any script or asset (images, css, etc).\n */\nclass AnyCalculator extends Calculator {\n  calculate() {\n    return this.assets\n      .filter((asset) => !asset.name.endsWith('.map'))\n      .map((asset) => ({\n        size: this.getAssetSize(asset),\n        label: asset.name,\n      }));\n  }\n}\n\n/**\n * Calculate the bytes given a string value.\n */\nfunction calculateBytes(input: string, baseline?: string, factor: 1 | -1 = 1): number {\n  const matches = input.match(/^\\s*(\\d+(?:\\.\\d+)?)\\s*(%|(?:[mM]|[kK]|[gG])?[bB])?\\s*$/);\n  if (!matches) {\n    return NaN;\n  }\n\n  const baselineBytes = (baseline && calculateBytes(baseline)) || 0;\n\n  let value = Number(matches[1]);\n  switch (matches[2] && matches[2].toLowerCase()) {\n    case '%':\n      value = (baselineBytes * value) / 100;\n      break;\n    case 'kb':\n      value *= 1024;\n      break;\n    case 'mb':\n      value *= 1024 * 1024;\n      break;\n    case 'gb':\n      value *= 1024 * 1024 * 1024;\n      break;\n  }\n\n  if (baselineBytes === 0) {\n    return value;\n  }\n\n  return baselineBytes + value * factor;\n}\n\nexport function* checkBudgets(\n  budgets: Budget[],\n  webpackStats: StatsCompilation,\n): IterableIterator<BudgetCalculatorResult> {\n  // Ignore AnyComponentStyle budgets as these are handled in `AnyComponentStyleBudgetChecker`.\n  const computableBudgets = budgets.filter((budget) => budget.type !== Type.AnyComponentStyle);\n\n  for (const budget of computableBudgets) {\n    const sizes = calculateSizes(budget, webpackStats);\n    for (const { size, label } of sizes) {\n      yield* checkThresholds(calculateThresholds(budget), size, label);\n    }\n  }\n}\n\nexport function* checkThresholds(\n  thresholds: IterableIterator<Threshold>,\n  size: number,\n  label?: string,\n): IterableIterator<BudgetCalculatorResult> {\n  for (const threshold of thresholds) {\n    switch (threshold.type) {\n      case ThresholdType.Max: {\n        if (size <= threshold.limit) {\n          continue;\n        }\n\n        const sizeDifference = formatSize(size - threshold.limit);\n        yield {\n          severity: threshold.severity,\n          label,\n          message: `${label} exceeded maximum budget. Budget ${formatSize(\n            threshold.limit,\n          )} was not met by ${sizeDifference} with a total of ${formatSize(size)}.`,\n        };\n        break;\n      }\n      case ThresholdType.Min: {\n        if (size >= threshold.limit) {\n          continue;\n        }\n\n        const sizeDifference = formatSize(threshold.limit - size);\n        yield {\n          severity: threshold.severity,\n          label,\n          message: `${label} failed to meet minimum budget. Budget ${formatSize(\n            threshold.limit,\n          )} was not met by ${sizeDifference} with a total of ${formatSize(size)}.`,\n        };\n        break;\n      }\n      default: {\n        throw new Error(`Unexpected threshold type: ${ThresholdType[threshold.type]}`);\n      }\n    }\n  }\n}\n"]}