lerna/lerna · error · ValidationError

ENOPKG

ENOPKG

Error message

Cannot diff, the package '${packageName}' does not exist.

What it means

Error "Cannot diff, the package '${packageName}' does not exist." thrown in lerna/lerna.

Source

Thrown at libs/commands/diff/src/index.ts:30

  pkgName?: string;
  ignoreChanges?: string[];
}

export class DiffCommand extends Command<DiffCommandOptions> {
  private args: string[] = [];

  override initialize() {
    const packageName = this.options.pkgName;
    let targetPackage;

    if (packageName) {
      const project = Object.values(this.projectGraph.nodes).find(
        (p) => p.package && getPackage(p).name === packageName
      );
      targetPackage = project && getPackage(project);

      if (!targetPackage) {
        throw new ValidationError("ENOPKG", `Cannot diff, the package '${packageName}' does not exist.`);
      }
    }

    if (!hasCommit(this.execOpts)) {
      throw new ValidationError("ENOCOMMITS", "Cannot diff, there are no commits in this repository yet.");
    }

    const args = ["diff", getLastCommit(this.execOpts), "--color=auto"];

    if (targetPackage) {
      args.push("--", targetPackage.location);
    } else {
      args.push("--", ...this.project.packageParentDirs);
    }

    if (this.options.ignoreChanges) {
      this.options.ignoreChanges.forEach((ignorePattern) => {
        // https://stackoverflow.com/a/21079437

View on GitHub (pinned to 35d15a1567)

When it happens

Trigger: Thrown at libs/commands/diff/src/index.ts:30 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of lerna/lerna@35d15a1567 (2026-08-27). Data as JSON: /api/errors/ed48864f2f6a1eb8. Report an issue: GitHub.