forked from TypeStrong/ts-loader
/
after-compile.ts
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/
after-compile.ts
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import * as path from 'path';
import * as ts from 'typescript';
import * as webpack from 'webpack';
import * as constants from './constants';
import { getEmitOutput } from './instances';
import {
TSFile,
TSFiles,
TSInstance,
WebpackError,
WebpackModule
} from './interfaces';
import {
collectAllDependants,
ensureProgram,
formatErrors,
isUsingProjectReferences
} from './utils';
export function makeAfterCompile(
instance: TSInstance,
configFilePath: string | undefined
) {
let getCompilerOptionDiagnostics = true;
let checkAllFilesForErrors = true;
return (
compilation: webpack.compilation.Compilation,
callback: () => void
) => {
// Don't add errors for child compilations
if (compilation.compiler.isChild()) {
callback();
return;
}
removeTSLoaderErrors(compilation.errors);
provideCompilerOptionDiagnosticErrorsToWebpack(
getCompilerOptionDiagnostics,
compilation,
instance,
configFilePath
);
getCompilerOptionDiagnostics = false;
const modules = determineModules(compilation);
const filesToCheckForErrors = determineFilesToCheckForErrors(
checkAllFilesForErrors,
instance
);
checkAllFilesForErrors = false;
const filesWithErrors: TSFiles = new Map<string, TSFile>();
provideErrorsToWebpack(
filesToCheckForErrors,
filesWithErrors,
compilation,
modules,
instance
);
provideDeclarationFilesToWebpack(
filesToCheckForErrors,
instance,
compilation
);
instance.filesWithErrors = filesWithErrors;
instance.modifiedFiles = null;
instance.projectsMissingSourceMaps = new Set();
callback();
};
}
/**
* handle compiler option errors after the first compile
*/
function provideCompilerOptionDiagnosticErrorsToWebpack(
getCompilerOptionDiagnostics: boolean,
compilation: webpack.compilation.Compilation,
instance: TSInstance,
configFilePath: string | undefined
) {
if (getCompilerOptionDiagnostics) {
const { languageService, loaderOptions, compiler, program } = instance;
const errorsToAdd = formatErrors(
program === undefined
? languageService!.getCompilerOptionsDiagnostics()
: program.getOptionsDiagnostics(),
loaderOptions,
instance.colors,
compiler,
{ file: configFilePath || 'tsconfig.json' },
compilation.compiler.context
);
compilation.errors.push(...errorsToAdd);
}
}
/**
* build map of all modules based on normalized filename
* this is used for quick-lookup when trying to find modules
* based on filepath
*/
function determineModules(compilation: webpack.compilation.Compilation) {
return compilation.modules.reduce<Map<string, WebpackModule[]>>(
(modules, module) => {
if (module.resource) {
const modulePath = path.normalize(module.resource);
const existingModules = modules.get(modulePath);
if (existingModules !== undefined) {
if (existingModules.indexOf(module) === -1) {
existingModules.push(module);
}
} else {
modules.set(modulePath, [module]);
}
}
return modules;
},
new Map<string, WebpackModule[]>()
);
}
function determineFilesToCheckForErrors(
checkAllFilesForErrors: boolean,
instance: TSInstance
) {
const { files, modifiedFiles, filesWithErrors, otherFiles } = instance;
// calculate array of files to check
const filesToCheckForErrors: TSFiles = new Map<string, TSFile>();
if (checkAllFilesForErrors) {
// check all files on initial run
for (const [filePath, file] of files) {
filesToCheckForErrors.set(filePath, file);
}
for (const [filePath, file] of otherFiles) {
filesToCheckForErrors.set(filePath, file);
}
} else if (modifiedFiles !== null && modifiedFiles !== undefined) {
// check all modified files, and all dependants
for (const modifiedFileName of modifiedFiles.keys()) {
collectAllDependants(
instance.reverseDependencyGraph,
modifiedFileName
).forEach(fileName => {
const fileToCheckForErrors =
files.get(fileName) || otherFiles.get(fileName);
filesToCheckForErrors.set(fileName, fileToCheckForErrors!);
});
}
}
// re-check files with errors from previous build
if (filesWithErrors !== undefined) {
for (const [fileWithErrorName, fileWithErrors] of filesWithErrors) {
filesToCheckForErrors.set(fileWithErrorName, fileWithErrors);
}
}
return filesToCheckForErrors;
}
function provideErrorsToWebpack(
filesToCheckForErrors: TSFiles,
filesWithErrors: TSFiles,
compilation: webpack.compilation.Compilation,
modules: Map<string, WebpackModule[]>,
instance: TSInstance
) {
const {
compiler,
files,
loaderOptions,
compilerOptions,
otherFiles
} = instance;
const filePathRegex =
compilerOptions.checkJs === true
? constants.dtsTsTsxJsJsxRegex
: constants.dtsTsTsxRegex;
// I’m pretty sure this will never be undefined here
const program = ensureProgram(instance);
for (const filePath of filesToCheckForErrors.keys()) {
if (filePath.match(filePathRegex) === null) {
continue;
}
const sourceFile = program && program.getSourceFile(filePath);
// If the source file is undefined, that probably means it’s actually part of an unbuilt project reference,
// which will have already produced a more useful error than the one we would get by proceeding here.
// If it’s undefined and we’re not using project references at all, I guess carry on so the user will
// get a useful error about which file was unexpectedly missing.
if (isUsingProjectReferences(instance) && sourceFile === undefined) {
continue;
}
const errors: ts.Diagnostic[] = [];
if (program && sourceFile) {
errors.push(
...program!.getSyntacticDiagnostics(sourceFile),
...program!.getSemanticDiagnostics(sourceFile)
);
}
if (errors.length > 0) {
const fileWithError = files.get(filePath) || otherFiles.get(filePath);
filesWithErrors.set(filePath, fileWithError!);
}
// if we have access to a webpack module, use that
const associatedModules = modules.get(filePath);
if (associatedModules !== undefined) {
associatedModules.forEach(module => {
// remove any existing errors
removeTSLoaderErrors(module.errors);
// append errors
const formattedErrors = formatErrors(
errors,
loaderOptions,
instance.colors,
compiler,
{ module },
compilation.compiler.context
);
module.errors.push(...formattedErrors);
compilation.errors.push(...formattedErrors);
});
} else {
// otherwise it's a more generic error
const formattedErrors = formatErrors(
errors,
loaderOptions,
instance.colors,
compiler,
{ file: filePath },
compilation.compiler.context
);
compilation.errors.push(...formattedErrors);
}
}
}
/**
* gather all declaration files from TypeScript and output them to webpack
*/
function provideDeclarationFilesToWebpack(
filesToCheckForErrors: TSFiles,
instance: TSInstance,
compilation: webpack.compilation.Compilation
) {
for (const filePath of filesToCheckForErrors.keys()) {
if (filePath.match(constants.tsTsxRegex) === null) {
continue;
}
const outputFiles = getEmitOutput(instance, filePath);
const declarationFiles = outputFiles.filter(outputFile =>
outputFile.name.match(constants.dtsDtsxOrDtsDtsxMapRegex)
);
declarationFiles.forEach(declarationFile => {
const assetPath = path.relative(
compilation.compiler.outputPath,
declarationFile.name
);
compilation.assets[assetPath] = {
source: () => declarationFile.text,
size: () => declarationFile.text.length
};
});
}
}
/**
* handle all other errors. The basic approach here to get accurate error
* reporting is to start with a "blank slate" each compilation and gather
* all errors from all files. Since webpack tracks errors in a module from
* compilation-to-compilation, and since not every module always runs through
* the loader, we need to detect and remove any pre-existing errors.
*/
function removeTSLoaderErrors(errors: WebpackError[]) {
let index = -1;
let length = errors.length;
while (++index < length) {
if (errors[index].loaderSource === 'ts-loader') {
errors.splice(index--, 1);
length--;
}
}
}