/
deconflictChunk.ts
230 lines (223 loc) · 7.31 KB
/
deconflictChunk.ts
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import Chunk from '../Chunk';
import ExternalModule from '../ExternalModule';
import Module from '../Module';
import ChildScope from '../ast/scopes/ChildScope';
import ExportDefaultVariable from '../ast/variables/ExportDefaultVariable';
import SyntheticNamedExportVariable from '../ast/variables/SyntheticNamedExportVariable';
import Variable from '../ast/variables/Variable';
import { GetInterop, InternalModuleFormat } from '../rollup/types';
import {
canDefaultBeTakenFromNamespace,
defaultInteropHelpersByInteropType,
isDefaultAProperty,
namespaceInteropHelpersByInteropType
} from './interopHelpers';
import { getSafeName } from './safeName';
export interface DependenciesToBeDeconflicted {
deconflictedDefault: ReadonlySet<ExternalModule>;
deconflictedNamespace: ReadonlySet<ExternalModule | Chunk>;
dependencies: ReadonlySet<ExternalModule | Chunk>;
}
const DECONFLICT_IMPORTED_VARIABLES_BY_FORMAT: {
[format in InternalModuleFormat]: (
usedNames: Set<string>,
imports: ReadonlySet<Variable>,
dependenciesToBeDeconflicted: DependenciesToBeDeconflicted,
interop: GetInterop,
preserveModules: boolean,
externalLiveBindings: boolean,
chunkByModule: ReadonlyMap<Module, Chunk>,
syntheticExports: ReadonlySet<SyntheticNamedExportVariable>
) => void;
} = {
amd: deconflictImportsOther,
cjs: deconflictImportsOther,
es: deconflictImportsEsmOrSystem,
iife: deconflictImportsOther,
system: deconflictImportsEsmOrSystem,
umd: deconflictImportsOther
};
export function deconflictChunk(
modules: readonly Module[],
dependenciesToBeDeconflicted: DependenciesToBeDeconflicted,
imports: ReadonlySet<Variable>,
usedNames: Set<string>,
format: InternalModuleFormat,
interop: GetInterop,
preserveModules: boolean,
externalLiveBindings: boolean,
chunkByModule: ReadonlyMap<Module, Chunk>,
syntheticExports: ReadonlySet<SyntheticNamedExportVariable>,
exportNamesByVariable: ReadonlyMap<Variable, readonly string[]>,
accessedGlobalsByScope: ReadonlyMap<ChildScope, ReadonlySet<string>>,
includedNamespaces: ReadonlySet<Module>
): void {
const reversedModules = modules.slice().reverse();
for (const module of reversedModules) {
module.scope.addUsedOutsideNames(
usedNames,
format,
exportNamesByVariable,
accessedGlobalsByScope
);
}
deconflictTopLevelVariables(usedNames, reversedModules, includedNamespaces);
DECONFLICT_IMPORTED_VARIABLES_BY_FORMAT[format](
usedNames,
imports,
dependenciesToBeDeconflicted,
interop,
preserveModules,
externalLiveBindings,
chunkByModule,
syntheticExports
);
for (const module of reversedModules) {
module.scope.deconflict(format, exportNamesByVariable, accessedGlobalsByScope);
}
}
function deconflictImportsEsmOrSystem(
usedNames: Set<string>,
imports: ReadonlySet<Variable>,
dependenciesToBeDeconflicted: DependenciesToBeDeconflicted,
_interop: GetInterop,
preserveModules: boolean,
_externalLiveBindings: boolean,
chunkByModule: ReadonlyMap<Module, Chunk>,
syntheticExports: ReadonlySet<SyntheticNamedExportVariable>
) {
// This is needed for namespace reexports
for (const dependency of dependenciesToBeDeconflicted.dependencies) {
if (preserveModules || dependency instanceof ExternalModule) {
dependency.variableName = getSafeName(dependency.suggestedVariableName, usedNames);
}
}
for (const variable of imports) {
const module = variable.module!;
const name = variable.name;
if (variable.isNamespace && (preserveModules || module instanceof ExternalModule)) {
variable.setRenderNames(
null,
(module instanceof ExternalModule ? module : chunkByModule.get(module)!).variableName
);
} else if (module instanceof ExternalModule && name === 'default') {
variable.setRenderNames(
null,
getSafeName(
[...module.exportedVariables].some(
([exportedVariable, exportedName]) => exportedName === '*' && exportedVariable.included
)
? module.suggestedVariableName + '__default'
: module.suggestedVariableName,
usedNames
)
);
} else {
variable.setRenderNames(null, getSafeName(name, usedNames));
}
}
for (const variable of syntheticExports) {
variable.setRenderNames(null, getSafeName(variable.name, usedNames));
}
}
function deconflictImportsOther(
usedNames: Set<string>,
imports: ReadonlySet<Variable>,
{ deconflictedDefault, deconflictedNamespace, dependencies }: DependenciesToBeDeconflicted,
interop: GetInterop,
preserveModules: boolean,
externalLiveBindings: boolean,
chunkByModule: ReadonlyMap<Module, Chunk>
): void {
for (const chunkOrExternalModule of dependencies) {
chunkOrExternalModule.variableName = getSafeName(
chunkOrExternalModule.suggestedVariableName,
usedNames
);
}
for (const externalModuleOrChunk of deconflictedNamespace) {
externalModuleOrChunk.namespaceVariableName = getSafeName(
`${externalModuleOrChunk.suggestedVariableName}__namespace`,
usedNames
);
}
for (const externalModule of deconflictedDefault) {
if (
deconflictedNamespace.has(externalModule) &&
canDefaultBeTakenFromNamespace(String(interop(externalModule.id)), externalLiveBindings)
) {
externalModule.defaultVariableName = externalModule.namespaceVariableName;
} else {
externalModule.defaultVariableName = getSafeName(
`${externalModule.suggestedVariableName}__default`,
usedNames
);
}
}
for (const variable of imports) {
const module = variable.module;
if (module instanceof ExternalModule) {
const name = variable.name;
if (name === 'default') {
const moduleInterop = String(interop(module.id));
const variableName = defaultInteropHelpersByInteropType[moduleInterop]
? module.defaultVariableName
: module.variableName;
if (isDefaultAProperty(moduleInterop, externalLiveBindings)) {
variable.setRenderNames(variableName, 'default');
} else {
variable.setRenderNames(null, variableName);
}
} else if (name === '*') {
variable.setRenderNames(
null,
namespaceInteropHelpersByInteropType[String(interop(module.id))]
? module.namespaceVariableName
: module.variableName
);
} else {
// if the second parameter is `null`, it uses its "name" for the property name
variable.setRenderNames(module.variableName, null);
}
} else {
const chunk = chunkByModule.get(module!)!;
if (preserveModules && variable.isNamespace) {
variable.setRenderNames(
null,
chunk.exportMode === 'default' ? chunk.namespaceVariableName : chunk.variableName
);
} else if (chunk.exportMode === 'default') {
variable.setRenderNames(null, chunk.variableName);
} else {
variable.setRenderNames(
chunk.variableName,
chunk.getVariableExportName(variable) as string | null
);
}
}
}
}
function deconflictTopLevelVariables(
usedNames: Set<string>,
modules: readonly Module[],
includedNamespaces: ReadonlySet<Module>
): void {
for (const module of modules) {
for (const variable of module.scope.variables.values()) {
if (
variable.included &&
// this will only happen for exports in some formats
!(
variable.renderBaseName ||
(variable instanceof ExportDefaultVariable && variable.getOriginalVariable() !== variable)
)
) {
variable.setRenderNames(null, getSafeName(variable.name, usedNames));
}
}
if (includedNamespaces.has(module)) {
const namespace = module.namespace;
namespace.setRenderNames(null, getSafeName(namespace.name, usedNames));
}
}
}