/
ExternalModule.ts
138 lines (128 loc) · 4.26 KB
/
ExternalModule.ts
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import ExternalVariable from './ast/variables/ExternalVariable';
import type {
CustomPluginOptions,
ModuleInfo,
NormalizedInputOptions,
NormalizedOutputOptions
} from './rollup/types';
import { EMPTY_ARRAY } from './utils/blank';
import { warnDeprecation } from './utils/error';
import { makeLegal } from './utils/identifierHelpers';
import { normalize, relative } from './utils/path';
import { printQuotedStringList } from './utils/printStringList';
import relativeId from './utils/relativeId';
export default class ExternalModule {
readonly declarations: { [name: string]: ExternalVariable } = Object.create(null);
defaultVariableName = '';
readonly dynamicImporters: string[] = [];
execIndex = Infinity;
readonly exportedVariables = new Map<ExternalVariable, string>();
readonly importers: string[] = [];
readonly info: ModuleInfo;
mostCommonSuggestion = 0;
readonly nameSuggestions: { [name: string]: number } = Object.create(null);
namespaceVariableName = '';
reexported = false;
renderPath: string = undefined as never;
suggestedVariableName: string;
used = false;
variableName = '';
constructor(
private readonly options: NormalizedInputOptions,
public readonly id: string,
moduleSideEffects: boolean | 'no-treeshake',
meta: CustomPluginOptions,
public readonly renormalizeRenderPath: boolean
) {
this.suggestedVariableName = makeLegal(id.split(/[\\/]/).pop()!);
const { importers, dynamicImporters } = this;
const info: ModuleInfo = (this.info = {
ast: null,
code: null,
dynamicallyImportedIdResolutions: EMPTY_ARRAY,
dynamicallyImportedIds: EMPTY_ARRAY,
get dynamicImporters() {
return dynamicImporters.sort();
},
hasDefaultExport: null,
get hasModuleSideEffects() {
warnDeprecation(
'Accessing ModuleInfo.hasModuleSideEffects from plugins is deprecated. Please use ModuleInfo.moduleSideEffects instead.',
false,
options
);
return info.moduleSideEffects;
},
id,
implicitlyLoadedAfterOneOf: EMPTY_ARRAY,
implicitlyLoadedBefore: EMPTY_ARRAY,
importedIdResolutions: EMPTY_ARRAY,
importedIds: EMPTY_ARRAY,
get importers() {
return importers.sort();
},
isEntry: false,
isExternal: true,
isIncluded: null,
meta,
moduleSideEffects,
syntheticNamedExports: false
});
// Hide the deprecated key so that it only warns when accessed explicitly
Object.defineProperty(this.info, 'hasModuleSideEffects', {
enumerable: false
});
}
getVariableForExportName(name: string): [variable: ExternalVariable] {
let declaration = this.declarations[name];
if (declaration) return [declaration];
this.declarations[name] = declaration = new ExternalVariable(this, name);
this.exportedVariables.set(declaration, name);
return [declaration];
}
setRenderPath(options: NormalizedOutputOptions, inputBase: string): string {
this.renderPath =
typeof options.paths === 'function' ? options.paths(this.id) : options.paths[this.id];
if (!this.renderPath) {
this.renderPath = this.renormalizeRenderPath
? normalize(relative(inputBase, this.id))
: this.id;
}
return this.renderPath;
}
suggestName(name: string): void {
if (!this.nameSuggestions[name]) this.nameSuggestions[name] = 0;
this.nameSuggestions[name] += 1;
if (this.nameSuggestions[name] > this.mostCommonSuggestion) {
this.mostCommonSuggestion = this.nameSuggestions[name];
this.suggestedVariableName = name;
}
}
warnUnusedImports(): void {
const unused = Object.keys(this.declarations).filter(name => {
if (name === '*') return false;
const declaration = this.declarations[name];
return !declaration.included && !this.reexported && !declaration.referenced;
});
if (unused.length === 0) return;
const importersSet = new Set<string>();
for (const name of unused) {
const { importers } = this.declarations[name].module;
for (const importer of importers) {
importersSet.add(importer);
}
}
const importersArray = [...importersSet];
this.options.onwarn({
code: 'UNUSED_EXTERNAL_IMPORT',
message: `${printQuotedStringList(unused, ['is', 'are'])} imported from external module "${
this.id
}" but never used in ${printQuotedStringList(
importersArray.map(importer => relativeId(importer))
)}.`,
names: unused,
source: this.id,
sources: importersArray
});
}
}