/
compilation.ts
191 lines (169 loc) · 5.38 KB
/
compilation.ts
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import { logger } from '@nrwl/devkit';
import { removeSync } from 'fs-extra';
import * as ts from 'typescript';
import type { CustomTransformers, Diagnostic, Program } from 'typescript';
import { readTsConfig } from '../typescript';
export interface TypeScriptCompilationOptions {
outputPath: string;
projectName: string;
projectRoot: string;
tsConfig: string;
deleteOutputPath?: boolean;
rootDir?: string;
watch?: boolean;
getCustomTransformers?(program: Program): CustomTransformers;
}
export interface TypescriptWatchChangeEvent {
diagnostic: ts.Diagnostic;
newLine: string;
options: ts.CompilerOptions;
errorCount: number;
}
export function compileTypeScript(options: TypeScriptCompilationOptions): {
success: boolean;
} {
const normalizedOptions = normalizeOptions(options);
const tsConfig = getNormalizedTsConfig(normalizedOptions);
if (normalizedOptions.deleteOutputPath) {
removeSync(normalizedOptions.outputPath);
}
return createProgram(tsConfig, normalizedOptions);
}
export function compileTypeScriptWatcher(
options: TypeScriptCompilationOptions,
callback: (
diagnostic: Diagnostic,
newLine: string,
options: ts.CompilerOptions,
errorCount: number
) => void | Promise<void>
) {
const normalizedOptions = normalizeOptions(options);
const tsConfig = getNormalizedTsConfig(normalizedOptions);
if (normalizedOptions.deleteOutputPath) {
removeSync(normalizedOptions.outputPath);
}
const host = ts.createWatchCompilerHost(
tsConfig.fileNames,
tsConfig.options,
ts.sys
);
const originalAfterProgramCreate = host.afterProgramCreate;
host.afterProgramCreate = (builderProgram) => {
const originalProgramEmit = builderProgram.emit;
builderProgram.emit = (
targetSourceFile,
writeFile,
cancellationToken,
emitOnlyDtsFiles,
customTransformers
) => {
const consumerCustomTransformers = options.getCustomTransformers?.(
builderProgram.getProgram()
);
const mergedCustomTransformers = mergeCustomTransformers(
customTransformers,
consumerCustomTransformers
);
return originalProgramEmit(
targetSourceFile,
writeFile,
cancellationToken,
emitOnlyDtsFiles,
mergedCustomTransformers
);
};
if (originalAfterProgramCreate) originalAfterProgramCreate(builderProgram);
};
const originalOnWatchStatusChange = host.onWatchStatusChange;
host.onWatchStatusChange = async (a, b, c, d) => {
originalOnWatchStatusChange?.(a, b, c, d);
await callback?.(a, b, c, d);
};
return ts.createWatchProgram(host);
}
function mergeCustomTransformers(
originalCustomTransformers: CustomTransformers | undefined,
consumerCustomTransformers: CustomTransformers | undefined
): CustomTransformers | undefined {
if (!consumerCustomTransformers) return originalCustomTransformers;
const mergedCustomTransformers: CustomTransformers = {};
if (consumerCustomTransformers.before) {
mergedCustomTransformers.before = originalCustomTransformers?.before
? [
...originalCustomTransformers.before,
...consumerCustomTransformers.before,
]
: consumerCustomTransformers.before;
}
if (consumerCustomTransformers.after) {
mergedCustomTransformers.after = originalCustomTransformers?.after
? [
...originalCustomTransformers.after,
...consumerCustomTransformers.after,
]
: consumerCustomTransformers.after;
}
if (consumerCustomTransformers.afterDeclarations) {
mergedCustomTransformers.afterDeclarations =
originalCustomTransformers?.afterDeclarations
? [
...originalCustomTransformers.afterDeclarations,
...consumerCustomTransformers.afterDeclarations,
]
: consumerCustomTransformers.afterDeclarations;
}
return mergedCustomTransformers;
}
function getNormalizedTsConfig(options: TypeScriptCompilationOptions) {
const tsConfig = readTsConfig(options.tsConfig);
tsConfig.options.outDir = options.outputPath;
tsConfig.options.noEmitOnError = true;
tsConfig.options.rootDir = options.rootDir;
return tsConfig;
}
function createProgram(
tsconfig: ts.ParsedCommandLine,
{ projectName, getCustomTransformers }: TypeScriptCompilationOptions
): { success: boolean } {
const host = ts.createCompilerHost(tsconfig.options);
const program = ts.createProgram({
rootNames: tsconfig.fileNames,
options: tsconfig.options,
host,
});
logger.info(`Compiling TypeScript files for project "${projectName}"...`);
const results = program.emit(
undefined,
undefined,
undefined,
undefined,
getCustomTransformers?.(program)
);
if (results.emitSkipped) {
const diagnostics = ts.formatDiagnosticsWithColorAndContext(
results.diagnostics,
{
getCurrentDirectory: () => ts.sys.getCurrentDirectory(),
getNewLine: () => ts.sys.newLine,
getCanonicalFileName: (name) => name,
}
);
logger.error(diagnostics);
return { success: false };
} else {
logger.info(
`Done compiling TypeScript files for project "${projectName}".`
);
return { success: true };
}
}
function normalizeOptions(
options: TypeScriptCompilationOptions
): TypeScriptCompilationOptions {
return {
...options,
deleteOutputPath: options.deleteOutputPath ?? true,
rootDir: options.rootDir ?? options.projectRoot,
};
}