/
ExternalModule.ts
136 lines (120 loc) · 3.84 KB
/
ExternalModule.ts
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import ExternalVariable from './ast/variables/ExternalVariable';
import {
CustomPluginOptions,
ModuleInfo,
NormalizedInputOptions,
NormalizedOutputOptions
} from './rollup/types';
import { EMPTY_ARRAY } from './utils/blank';
import { makeLegal } from './utils/identifierHelpers';
import { normalize, relative } from './utils/path';
export default class ExternalModule {
chunk: void;
declarations: { [name: string]: ExternalVariable };
defaultVariableName = '';
dynamicImporters: string[] = [];
execIndex: number;
exportedVariables: Map<ExternalVariable, string>;
importers: string[] = [];
info: ModuleInfo;
mostCommonSuggestion = 0;
namespaceVariableName = '';
nameSuggestions: { [name: string]: number };
reexported = false;
renderPath: string = undefined as any;
suggestedVariableName: string;
used = false;
variableName = '';
constructor(
private readonly options: NormalizedInputOptions,
public readonly id: string,
hasModuleSideEffects: boolean | 'no-treeshake',
meta: CustomPluginOptions,
public renormalizeRenderPath: boolean
) {
this.execIndex = Infinity;
this.suggestedVariableName = makeLegal(id.split(/[\\/]/).pop()!);
this.nameSuggestions = Object.create(null);
this.declarations = Object.create(null);
this.exportedVariables = new Map();
const module = this;
this.info = {
ast: null,
code: null,
dynamicallyImportedIds: EMPTY_ARRAY,
get dynamicImporters() {
return module.dynamicImporters.sort();
},
hasModuleSideEffects,
id,
implicitlyLoadedAfterOneOf: EMPTY_ARRAY,
implicitlyLoadedBefore: EMPTY_ARRAY,
importedIds: EMPTY_ARRAY,
get importers() {
return module.importers.sort();
},
isEntry: false,
isExternal: true,
meta,
syntheticNamedExports: false
};
}
getVariableForExportName(name: string): 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) {
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) {
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() {
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 names =
unused.length === 1
? `'${unused[0]}' is`
: `${unused
.slice(0, -1)
.map(name => `'${name}'`)
.join(', ')} and '${unused.slice(-1)}' are`;
const importersSet = new Set<string>()
for (const name of unused) {
const {importers, dynamicImporters} = this.declarations[name].module
if (Array.isArray(importers)) importers.forEach(v => importersSet.add(v))
if (Array.isArray(dynamicImporters)) dynamicImporters.forEach(v => importersSet.add(v))
}
const importersArray = Array.from(importersSet)
let importerList = ''
if (importersArray.length > 0) {
importerList = ' in' + importersArray.map(s => `\n\t${s};`)
}
this.options.onwarn({
code: 'UNUSED_EXTERNAL_IMPORT',
message: `${names} imported from external module '${this.id}' but never used${importerList}`,
names: unused,
source: this.id,
sources: importersArray
});
}
}