public_options.ts

/**
 * @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
 */

import {ExtendedTemplateDiagnosticName} from '../../../../ngtsc/diagnostics';

/**
 * Options supported by the legacy View Engine compiler, which are still consumed by the Angular Ivy
 * compiler for backwards compatibility.
 *
 * These are expected to be removed at some point in the future.
 *
 * @publicApi
 */
export interface LegacyNgcOptions {
  /** generate all possible generated files  */
  allowEmptyCodegenFiles?: boolean;

  /**
   * Whether to type check the entire template.
   *
   * This flag currently controls a couple aspects of template type-checking, including
   * whether embedded views are checked.
   *
   * For maximum type-checking, set this to `true`, and set `strictTemplates` to `true`.
   *
   * It is an error for this flag to be `false`, while `strictTemplates` is set to `true`.
   *
   * @deprecated The `fullTemplateTypeCheck` option has been superseded by the more granular
   * `strictTemplates` family of compiler options. Usage of `fullTemplateTypeCheck` is therefore
   * deprecated, `strictTemplates` and its related options should be used instead.
   */
  fullTemplateTypeCheck?: boolean;

  /**
   * Whether to generate a flat module index of the given name and the corresponding
   * flat module metadata. This option is intended to be used when creating flat
   * modules similar to how `@angular/core` and `@angular/common` are packaged.
   * When this option is used the `package.json` for the library should refer to the
   * generated flat module index instead of the library index file. When using this
   * option only one .metadata.json file is produced that contains all the metadata
   * necessary for symbols exported from the library index.
   * In the generated .ngfactory.ts files flat module index is used to import symbols
   * including both the public API from the library index as well as shrouded internal
   * symbols.
   * By default the .ts file supplied in the `files` field is assumed to be the
   * library index. If more than one is specified, uses `libraryIndex` to select the
   * file to use. If more than one .ts file is supplied and no `libraryIndex` is supplied
   * an error is produced.
   * A flat module index .d.ts and .js will be created with the given `flatModuleOutFile`
   * name in the same location as the library index .d.ts file is emitted.
   * For example, if a library uses `public_api.ts` file as the library index of the
   * module the `tsconfig.json` `files` field would be `["public_api.ts"]`. The
   * `flatModuleOutFile` options could then be set to, for example `"index.js"`, which
   * produces `index.d.ts` and  `index.metadata.json` files. The library's
   * `package.json`'s `module` field would be `"index.js"` and the `typings` field would
   * be `"index.d.ts"`.
   */
  flatModuleOutFile?: string;

  /**
   * Preferred module id to use for importing flat module. References generated by `ngc`
   * will use this module name when importing symbols from the flat module. This is only
   * meaningful when `flatModuleOutFile` is also supplied. It is otherwise ignored.
   */
  flatModuleId?: string;

  /**
   * Always report errors a parameter is supplied whose injection type cannot
   * be determined. When this value option is not provided or is `false`, constructor
   * parameters of classes marked with `@Injectable` whose type cannot be resolved will
   * produce a warning. With this option `true`, they produce an error. When this option is
   * not provided is treated as if it were `false`.
   */
  strictInjectionParameters?: boolean;

  /**
   * Whether to remove blank text nodes from compiled templates. It is `false` by default starting
   * from Angular 6.
   */
  preserveWhitespaces?: boolean;
}

/**
 * Options which were added to the Angular Ivy compiler to support backwards compatibility with
 * existing View Engine applications.
 *
 * These are expected to be removed at some point in the future.
 *
 * @publicApi
 */
export interface NgcCompatibilityOptions {
  /**
   * Controls whether ngtsc will emit `.ngfactory.js` shims for each compiled `.ts` file.
   *
   * These shims support legacy imports from `ngfactory` files, by exporting a factory shim
   * for each component or NgModule in the original `.ts` file.
   */
  generateNgFactoryShims?: boolean;

  /**
   * Controls whether ngtsc will emit `.ngsummary.js` shims for each compiled `.ts` file.
   *
   * These shims support legacy imports from `ngsummary` files, by exporting an empty object
   * for each NgModule in the original `.ts` file. The only purpose of summaries is to feed them to
   * `TestBed`, which is a no-op in Ivy.
   */
  generateNgSummaryShims?: boolean;
}

/**
 * Options related to template type-checking and its strictness.
 *
 * @publicApi
 */
export interface StrictTemplateOptions {
  /**
   * If `true`, implies all template strictness flags below (unless individually disabled).
   *
   * This flag is a superset of the deprecated `fullTemplateTypeCheck` option.
   *
   * Defaults to `false`, even if "fullTemplateTypeCheck" is `true`.
   */
  strictTemplates?: boolean;


  /**
   * Whether to check the type of a binding to a directive/component input against the type of the
   * field on the directive/component.
   *
   * For example, if this is `false` then the expression `[input]="expr"` will have `expr` type-
   * checked, but not the assignment of the resulting type to the `input` property of whichever
   * directive or component is receiving the binding. If set to `true`, both sides of the assignment
   * are checked.
   *
   * Defaults to `false`, even if "fullTemplateTypeCheck" is set.
   */
  strictInputTypes?: boolean;

  /**
   * Whether to check if the input binding attempts to assign to a restricted field (readonly,
   * private, or protected) on the directive/component.
   *
   * Defaults to `false`, even if "fullTemplateTypeCheck", "strictTemplates" and/or
   * "strictInputTypes" is set. Note that if `strictInputTypes` is not set, or set to `false`, this
   * flag has no effect.
   *
   * Tracking issue for enabling this by default: https://github.com/angular/angular/issues/38400
   */
  strictInputAccessModifiers?: boolean;

  /**
   * Whether to use strict null types for input bindings for directives.
   *
   * If this is `true`, applications that are compiled with TypeScript's `strictNullChecks` enabled
   * will produce type errors for bindings which can evaluate to `undefined` or `null` where the
   * inputs's type does not include `undefined` or `null` in its type. If set to `false`, all
   * binding expressions are wrapped in a non-null assertion operator to effectively disable strict
   * null checks.
   *
   * Defaults to `false`, even if "fullTemplateTypeCheck" is set. Note that if `strictInputTypes` is
   * not set, or set to `false`, this flag has no effect.
   */
  strictNullInputTypes?: boolean;

  /**
   * Whether to check text attributes that happen to be consumed by a directive or component.
   *
   * For example, in a template containing `<input matInput disabled>` the `disabled` attribute ends
   * up being consumed as an input with type `boolean` by the `matInput` directive. At runtime, the
   * input will be set to the attribute's string value, which is an empty string for attributes
   * without a value, so with this flag set to `true`, an error would be reported. If set to
   * `false`, text attributes will never report an error.
   *
   * Defaults to `false`, even if "fullTemplateTypeCheck" is set. Note that if `strictInputTypes` is
   * not set, or set to `false`, this flag has no effect.
   */
  strictAttributeTypes?: boolean;

  /**
   * Whether to use a strict type for null-safe navigation operations.
   *
   * If this is `false`, then the return type of `a?.b` or `a?()` will be `any`. If set to `true`,
   * then the return type of `a?.b` for example will be the same as the type of the ternary
   * expression `a != null ? a.b : a`.
   *
   * Defaults to `false`, even if "fullTemplateTypeCheck" is set.
   */
  strictSafeNavigationTypes?: boolean;

  /**
   * Whether to infer the type of local references.
   *
   * If this is `true`, the type of a `#ref` variable on a DOM node in the template will be
   * determined by the type of `document.createElement` for the given DOM node. If set to `false`,
   * the type of `ref` for DOM nodes will be `any`.
   *
   * Defaults to `false`, even if "fullTemplateTypeCheck" is set.
   */
  strictDomLocalRefTypes?: boolean;

  /**
   * Whether to infer the type of the `$event` variable in event bindings for directive outputs or
   * animation events.
   *
   * If this is `true`, the type of `$event` will be inferred based on the generic type of
   * `EventEmitter`/`Subject` of the output. If set to `false`, the `$event` variable will be of
   * type `any`.
   *
   * Defaults to `false`, even if "fullTemplateTypeCheck" is set.
   */
  strictOutputEventTypes?: boolean;

  /**
   * Whether to infer the type of the `$event` variable in event bindings to DOM events.
   *
   * If this is `true`, the type of `$event` will be inferred based on TypeScript's
   * `HTMLElementEventMap`, with a fallback to the native `Event` type. If set to `false`, the
   * `$event` variable will be of type `any`.
   *
   * Defaults to `false`, even if "fullTemplateTypeCheck" is set.
   */
  strictDomEventTypes?: boolean;

  /**
   * Whether to include the generic type of components when type-checking the template.
   *
   * If no component has generic type parameters, this setting has no effect.
   *
   * If a component has generic type parameters and this setting is `true`, those generic parameters
   * will be included in the context type for the template. If `false`, any generic parameters will
   * be set to `any` in the template context type.
   *
   * Defaults to `false`, even if "fullTemplateTypeCheck" is set.
   */
  strictContextGenerics?: boolean;

  /**
   * Whether object or array literals defined in templates use their inferred type, or are
   * interpreted as `any`.
   *
   * Defaults to `false` unless `fullTemplateTypeCheck` or `strictTemplates` are set.
   */
  strictLiteralTypes?: boolean;
}

/**
 * A label referring to a `ts.DiagnosticCategory` or `'suppress'`, meaning the associated diagnostic
 * should not be displayed at all.
 *
 * @publicApi
 */
export enum DiagnosticCategoryLabel {
  /** Treat the diagnostic as a warning, don't fail the compilation. */
  Warning = 'warning',

  /** Treat the diagnostic as a hard error, fail the compilation. */
  Error = 'error',

  /** Ignore the diagnostic altogether. */
  Suppress = 'suppress',
}

/**
 * Options which control how diagnostics are emitted from the compiler.
 *
 * @publicApi
 */
export interface DiagnosticOptions {
  /** Options which control how diagnostics are emitted from the compiler. */
  extendedDiagnostics?: {
    /**
     * The category to use for configurable diagnostics which are not overridden by `checks`. Uses
     * `warning` by default.
     */
    defaultCategory?: DiagnosticCategoryLabel;

    /**
     * A map of each extended template diagnostic's name to its category. This can be expanded in
     * the future with more information for each check or for additional diagnostics not part of the
     * extended template diagnostics system.
     */
    checks?: {[Name in ExtendedTemplateDiagnosticName]?: DiagnosticCategoryLabel};
  };
}

/**
 * Options which control behavior useful for "monorepo" build cases using Bazel (such as the
 * internal Google monorepo, g3).
 *
 * @publicApi
 */
export interface BazelAndG3Options {
  /**
   * Enables the generation of alias re-exports of directives/pipes that are visible from an
   * NgModule from that NgModule's file.
   *
   * This option should be disabled for application builds or for Angular Package Format libraries
   * (where NgModules along with their directives/pipes are exported via a single entrypoint).
   *
   * For other library compilations which are intended to be path-mapped into an application build
   * (or another library), enabling this option enables the resulting deep imports to work
   * correctly.
   *
   * A consumer of such a path-mapped library will write an import like:
   *
   * ```typescript
   * import {LibModule} from 'lib/deep/path/to/module';
   * ```
   *
   * The compiler will attempt to generate imports of directives/pipes from that same module
   * specifier (the compiler does not rewrite the user's given import path, unlike View Engine).
   *
   * ```typescript
   * import {LibDir, LibCmp, LibPipe} from 'lib/deep/path/to/module';
   * ```
   *
   * It would be burdensome for users to have to re-export all directives/pipes alongside each
   * NgModule to support this import model. Enabling this option tells the compiler to generate
   * private re-exports alongside the NgModule of all the directives/pipes it makes available, to
   * support these future imports.
   */
  generateDeepReexports?: boolean;

  /**
   * The `.d.ts` file for NgModules contain type pointers to their declarations, imports, and
   * exports. Without this flag, the generated type definition will include
   * components/directives/pipes/NgModules that are declared or imported locally in the NgModule and
   * not necessarily exported to consumers.
   *
   * With this flag set, the type definition generated in the `.d.ts` for an NgModule will be
   * filtered to only list those types which are publicly exported by the NgModule.
   */
  onlyPublishPublicTypingsForNgModules?: boolean;

  /**
   * Insert JSDoc type annotations needed by Closure Compiler
   */
  annotateForClosureCompiler?: boolean;
}

/**
 * Options related to i18n compilation support.
 *
 * @publicApi
 */
export interface I18nOptions {
  /**
   * Locale of the imported translations
   */
  i18nInLocale?: string;

  /**
   * Export format (xlf, xlf2 or xmb) when the xi18n operation is requested.
   */
  i18nOutFormat?: string;

  /**
   * Path to the extracted message file to emit when the xi18n operation is requested.
   */
  i18nOutFile?: string;


  /**
   * Locale of the application (used when xi18n is requested).
   */
  i18nOutLocale?: string;

  /**
   * Render `$localize` messages with legacy format ids.
   *
   * The default value for now is `true`.
   *
   * Use this option when use are using the `$localize` based localization messages but
   * have not migrated the translation files to use the new `$localize` message id format.
   */
  enableI18nLegacyMessageIdFormat?: boolean;

  /**
   * Whether translation variable name should contain external message id
   * (used by Closure Compiler's output of `goog.getMsg` for transition period)
   */
  i18nUseExternalIds?: boolean;

  /**
   * If templates are stored in external files (e.g. via `templateUrl`) then we need to decide
   * whether or not to normalize the line-endings (from `\r\n` to `\n`) when processing ICU
   * expressions.
   *
   * Ideally we would always normalize, but for backward compatibility this flag allows the template
   * parser to avoid normalizing line endings in ICU expressions.
   *
   * If `true` then we will normalize ICU expression line endings.
   * The default is `false`, but this will be switched in a future major release.
   */
  i18nNormalizeLineEndingsInICUs?: boolean;
}

/**
 * Options that specify compilation target.
 *
 * @publicApi
 */
export interface TargetOptions {
  /**
   * Specifies the compilation mode to use. The following modes are available:
   * - 'full': generates fully AOT compiled code using Ivy instructions.
   * - 'partial': generates code in a stable, but intermediate form suitable for publication to NPM.
   *
   * The default value is 'full'.
   */
  compilationMode?: 'full'|'partial';
}

/**
 * Miscellaneous options that don't fall into any other category
 *
 * @publicApi
 */
export interface MiscOptions {
  /**
   * Whether the compiler should avoid generating code for classes that haven't been exported.
   * Defaults to `true`.
   */
  compileNonExportedClasses?: boolean;

  /**
   * Disable TypeScript Version Check.
   */
  disableTypeScriptVersionCheck?: boolean;
}