@nestjs/cli/lib/compiler/helpers/delete-out-dir.js

Nest - modern, fast, powerful node.js web framework (@cli)

import { rm } from 'fs/promises';
import * as ts from 'typescript';
import { getValueOrDefault } from './get-value-or-default.js';
import { areOutsidePathsAllowed, assertPathInsideProject, } from './path-confinement.js';
/**
 * A recursive delete is not atomic: it walks the tree, and anything created
 * between the "readdir" of a directory and its "rmdir" makes the removal fail
 * with ENOTEMPTY. Concurrent writers into "outDir" are common in monorepos
 * (a sibling "tsc --noEmit --incremental" dropping its buildinfo there, for
 * instance), which turns "deleteOutDir" into a flaky build. Node already
 * treats ENOTEMPTY - along with EBUSY, EMFILE, ENFILE and EPERM, the errors
 * Windows raises for a file another process still holds - as retryable, but
 * only retries when "maxRetries" is set; it defaults to 0.
 *
 * See https://github.com/nestjs/nest-cli/issues/3509
 */
const RM_MAX_RETRIES = 3;
export async function deleteOutDirIfEnabled(configuration, appName, dirPath, tsOptions) {
    const isDeleteEnabled = getValueOrDefault(configuration, 'compilerOptions.deleteOutDir', appName);
    if (!isDeleteEnabled) {
        return;
    }
    const shouldValidate = !areOutsidePathsAllowed(configuration, appName);
    // With "incremental" enabled but no explicit "tsBuildInfoFile", TypeScript
    // derives a default location that can fall outside "outDir" (with "outDir"
    // and "rootDir" both set, "tsconfig.build.tsbuildinfo" lands next to the
    // tsconfig), so the recursive delete below would leave it behind. Reuse the
    // compiler's own resolution to remove the buildinfo wherever it actually is.
    const tsBuildInfoFile = tsOptions &&
        (tsOptions.tsBuildInfoFile ?? ts.getTsBuildInfoEmitOutputFilePath(tsOptions));
    // Both paths are validated before anything is removed, so that a rejected
    // "tsBuildInfoFile" cannot leave a half-deleted output directory behind.
    const outDirToDelete = shouldValidate
        ? assertPathInsideProject(dirPath, 'outDir')
        : dirPath;
    const tsBuildInfoFileToDelete = shouldValidate && tsBuildInfoFile
        ? assertPathInsideProject(tsBuildInfoFile, 'tsBuildInfoFile')
        : tsBuildInfoFile;
    await rm(outDirToDelete, {
        recursive: true,
        force: true,
        maxRetries: RM_MAX_RETRIES,
    });
    if (tsBuildInfoFileToDelete) {
        await rm(tsBuildInfoFileToDelete, {
            force: true,
            maxRetries: RM_MAX_RETRIES,
        });
    }
}