forked from Fediversity/fediversity.eu
134 lines
4.2 KiB
JavaScript
134 lines
4.2 KiB
JavaScript
import CJSImportProcessor from "./CJSImportProcessor";
|
|
import computeSourceMap, {} from "./computeSourceMap";
|
|
import {HelperManager} from "./HelperManager";
|
|
import identifyShadowedGlobals from "./identifyShadowedGlobals";
|
|
import NameManager from "./NameManager";
|
|
import {validateOptions} from "./Options";
|
|
|
|
import {parse} from "./parser";
|
|
|
|
import TokenProcessor from "./TokenProcessor";
|
|
import RootTransformer from "./transformers/RootTransformer";
|
|
import formatTokens from "./util/formatTokens";
|
|
import getTSImportedNames from "./util/getTSImportedNames";
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
;
|
|
|
|
export function getVersion() {
|
|
/* istanbul ignore next */
|
|
return "3.35.0";
|
|
}
|
|
|
|
export function transform(code, options) {
|
|
validateOptions(options);
|
|
try {
|
|
const sucraseContext = getSucraseContext(code, options);
|
|
const transformer = new RootTransformer(
|
|
sucraseContext,
|
|
options.transforms,
|
|
Boolean(options.enableLegacyBabel5ModuleInterop),
|
|
options,
|
|
);
|
|
const transformerResult = transformer.transform();
|
|
let result = {code: transformerResult.code};
|
|
if (options.sourceMapOptions) {
|
|
if (!options.filePath) {
|
|
throw new Error("filePath must be specified when generating a source map.");
|
|
}
|
|
result = {
|
|
...result,
|
|
sourceMap: computeSourceMap(
|
|
transformerResult,
|
|
options.filePath,
|
|
options.sourceMapOptions,
|
|
code,
|
|
sucraseContext.tokenProcessor.tokens,
|
|
),
|
|
};
|
|
}
|
|
return result;
|
|
// eslint-disable-next-line @typescript-eslint/no-explicit-any
|
|
} catch (e) {
|
|
if (options.filePath) {
|
|
e.message = `Error transforming ${options.filePath}: ${e.message}`;
|
|
}
|
|
throw e;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Return a string representation of the sucrase tokens, mostly useful for
|
|
* diagnostic purposes.
|
|
*/
|
|
export function getFormattedTokens(code, options) {
|
|
const tokens = getSucraseContext(code, options).tokenProcessor.tokens;
|
|
return formatTokens(code, tokens);
|
|
}
|
|
|
|
/**
|
|
* Call into the parser/tokenizer and do some further preprocessing:
|
|
* - Come up with a set of used names so that we can assign new names.
|
|
* - Preprocess all import/export statements so we know which globals we are interested in.
|
|
* - Compute situations where any of those globals are shadowed.
|
|
*
|
|
* In the future, some of these preprocessing steps can be skipped based on what actual work is
|
|
* being done.
|
|
*/
|
|
function getSucraseContext(code, options) {
|
|
const isJSXEnabled = options.transforms.includes("jsx");
|
|
const isTypeScriptEnabled = options.transforms.includes("typescript");
|
|
const isFlowEnabled = options.transforms.includes("flow");
|
|
const disableESTransforms = options.disableESTransforms === true;
|
|
const file = parse(code, isJSXEnabled, isTypeScriptEnabled, isFlowEnabled);
|
|
const tokens = file.tokens;
|
|
const scopes = file.scopes;
|
|
|
|
const nameManager = new NameManager(code, tokens);
|
|
const helperManager = new HelperManager(nameManager);
|
|
const tokenProcessor = new TokenProcessor(
|
|
code,
|
|
tokens,
|
|
isFlowEnabled,
|
|
disableESTransforms,
|
|
helperManager,
|
|
);
|
|
const enableLegacyTypeScriptModuleInterop = Boolean(options.enableLegacyTypeScriptModuleInterop);
|
|
|
|
let importProcessor = null;
|
|
if (options.transforms.includes("imports")) {
|
|
importProcessor = new CJSImportProcessor(
|
|
nameManager,
|
|
tokenProcessor,
|
|
enableLegacyTypeScriptModuleInterop,
|
|
options,
|
|
options.transforms.includes("typescript"),
|
|
Boolean(options.keepUnusedImports),
|
|
helperManager,
|
|
);
|
|
importProcessor.preprocessTokens();
|
|
// We need to mark shadowed globals after processing imports so we know that the globals are,
|
|
// but before type-only import pruning, since that relies on shadowing information.
|
|
identifyShadowedGlobals(tokenProcessor, scopes, importProcessor.getGlobalNames());
|
|
if (options.transforms.includes("typescript") && !options.keepUnusedImports) {
|
|
importProcessor.pruneTypeOnlyImports();
|
|
}
|
|
} else if (options.transforms.includes("typescript") && !options.keepUnusedImports) {
|
|
// Shadowed global detection is needed for TS implicit elision of imported names.
|
|
identifyShadowedGlobals(tokenProcessor, scopes, getTSImportedNames(tokenProcessor));
|
|
}
|
|
return {tokenProcessor, scopes, nameManager, importProcessor, helperManager};
|
|
}
|