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transpile.ts
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158 lines (127 loc) · 5.57 KB
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import * as path from "path";
import * as ts from "typescript";
import { CompilerOptions, validateOptions } from "../CompilerOptions";
import { createPrinter } from "../LuaPrinter";
import { createVisitorMap, transformSourceFile } from "../transformation";
import { isNonNull } from "../utils";
import { Plugin } from "./plugins";
import { getTransformers } from "./transformers";
import { EmitHost, ProcessedFile } from "./utils";
import * as performance from "../measure-performance";
export interface TranspileOptions {
program: ts.Program;
sourceFiles?: ts.SourceFile[];
customTransformers?: ts.CustomTransformers;
plugins?: Plugin[];
}
export interface TranspileResult {
diagnostics: ts.Diagnostic[];
transpiledFiles: ProcessedFile[];
}
export function getProgramTranspileResult(
emitHost: EmitHost,
writeFileResult: ts.WriteFileCallback,
{ program, sourceFiles: targetSourceFiles, customTransformers = {}, plugins = [] }: TranspileOptions
): TranspileResult {
performance.startSection("beforeTransform");
const options = program.getCompilerOptions() as CompilerOptions;
if (options.tstlVerbose) {
console.log("Parsing project settings");
}
const diagnostics = validateOptions(options);
let transpiledFiles: ProcessedFile[] = [];
if (options.noEmitOnError) {
const preEmitDiagnostics = [
...diagnostics,
...program.getOptionsDiagnostics(),
...program.getGlobalDiagnostics(),
];
if (targetSourceFiles) {
for (const sourceFile of targetSourceFiles) {
preEmitDiagnostics.push(...program.getSyntacticDiagnostics(sourceFile));
preEmitDiagnostics.push(...program.getSemanticDiagnostics(sourceFile));
}
} else {
preEmitDiagnostics.push(...program.getSyntacticDiagnostics());
preEmitDiagnostics.push(...program.getSemanticDiagnostics());
}
if (preEmitDiagnostics.length === 0 && (options.declaration || options.composite)) {
preEmitDiagnostics.push(...program.getDeclarationDiagnostics());
}
if (preEmitDiagnostics.length > 0) {
performance.endSection("beforeTransform");
return { diagnostics: preEmitDiagnostics, transpiledFiles };
}
}
for (const plugin of plugins) {
if (plugin.beforeTransform) {
const pluginDiagnostics = plugin.beforeTransform(program, options, emitHost) ?? [];
diagnostics.push(...pluginDiagnostics);
}
}
const visitorMap = createVisitorMap(plugins.map(p => p.visitors).filter(isNonNull));
const printer = createPrinter(plugins.map(p => p.printer).filter(isNonNull));
const processSourceFile = (sourceFile: ts.SourceFile) => {
if (options.tstlVerbose) {
console.log(`Transforming ${sourceFile.fileName}`);
}
performance.startSection("transpile");
const { file, diagnostics: transformDiagnostics } = transformSourceFile(program, sourceFile, visitorMap);
diagnostics.push(...transformDiagnostics);
performance.endSection("transpile");
if (!options.noEmit && !options.emitDeclarationOnly) {
performance.startSection("print");
if (options.tstlVerbose) {
console.log(`Printing ${sourceFile.fileName}`);
}
const printResult = printer(program, emitHost, sourceFile.fileName, file);
transpiledFiles.push({
sourceFiles: [sourceFile],
fileName: path.normalize(sourceFile.fileName),
luaAst: file,
...printResult,
});
performance.endSection("print");
}
};
const transformers = getTransformers(program, diagnostics, customTransformers, processSourceFile);
const isEmittableJsonFile = (sourceFile: ts.SourceFile) =>
sourceFile.flags & ts.NodeFlags.JsonFile &&
!options.emitDeclarationOnly &&
!program.isSourceFileFromExternalLibrary(sourceFile);
// We always have to run transformers to get diagnostics
const oldNoEmit = options.noEmit;
options.noEmit = false;
const writeFile: ts.WriteFileCallback = (fileName, ...rest) => {
if (!fileName.endsWith(".js") && !fileName.endsWith(".js.map") && !fileName.endsWith(".json")) {
writeFileResult(fileName, ...rest);
}
};
performance.endSection("beforeTransform");
if (targetSourceFiles) {
for (const file of targetSourceFiles) {
if (isEmittableJsonFile(file)) {
processSourceFile(file);
} else {
diagnostics.push(...program.emit(file, writeFile, undefined, false, transformers).diagnostics);
}
}
} else {
diagnostics.push(...program.emit(undefined, writeFile, undefined, false, transformers).diagnostics);
// JSON files don't get through transformers and aren't written when outDir is the same as rootDir
program.getSourceFiles().filter(isEmittableJsonFile).forEach(processSourceFile);
}
performance.startSection("afterPrint");
options.noEmit = oldNoEmit;
if (options.noEmit || (options.noEmitOnError && diagnostics.length > 0)) {
transpiledFiles = [];
}
for (const plugin of plugins) {
if (plugin.afterPrint) {
const pluginDiagnostics = plugin.afterPrint(program, options, emitHost, transpiledFiles) ?? [];
diagnostics.push(...pluginDiagnostics);
}
}
performance.endSection("afterPrint");
return { diagnostics, transpiledFiles };
}