denoland/deno · error · Error

Linter plugin name must not have consequtive hyphens.

Error message

${prefix}Linter plugin name must not have consequtive hyphens.

What it means

The third naming rule for Deno lint plugins: the name must not contain two hyphens in a row (plugin.name.includes("--") in cli/js/40_lint.js). Like the other checks it runs at plugin install time and keeps names canonical kebab-case. Note the message contains a source-level typo — "consequtive" instead of "consecutive" — so search logs and docs for the exact misspelled text.

Solutions

1. Collapse repeated hyphens to a single one: "my--plugin" → "my-plugin".
2. If the name is assembled from parts, filter out empty segments before joining with '-'.
3. Apply name.replace(/-{2,}/g, "-") at generation time, then re-run `deno lint`.

Example fix

// before
export default {
  name: "team--lint-rules",
  rules: {},
};

// after
export default {
  name: "team-lint-rules",
  rules: {},
};

const name = raw.replace(/-{2,}/g, "-"); // collapse doubles before exporting
export default { name, rules };

/** @param {unknown} name @returns {boolean} */
function hasNoConsecutiveHyphens(name) {
  return typeof name === "string" && !name.includes("--");
}

When it happens

Trigger: Installing a lint plugin whose `name` is "my--plugin", "a---b", or any name containing "--". The name already passed the charset and edge-hyphen checks.

Common situations: Concatenating name parts with '-' where one part is empty ("team" + "-" + "" + "-rules"); hand-editing a name and doubling the hyphen; normalizing "my plugin" to "my--plugin" by mistake.

Related errors

• Linter plugin name must only contain lowercase letters…
• Linter plugin name must start and end with a lowercase…
• Linter plugin rules must be an object
• Destroy hook of " " errored
• Empty node

AI-assisted analysis of denoland/deno@9ad36f7a2c (2026-08-20). Data as JSON: /api/errors/c5a085e9035c995c. Report an issue: GitHub.

Appendix: source

Thrown at cli/js/40_lint.js:499

    : "";
  if (typeof plugin !== "object") {
    throw new Error(`${prefix}Linter plugin must be an object`);
  }
  if (typeof plugin.name !== "string") {
    throw new Error(`${prefix}Linter plugin name must be a string`);
  }
  if (!/^[a-z-]+$/.test(plugin.name)) {
    throw new Error(
      `${prefix}Linter plugin name must only contain lowercase letters (a-z) or hyphens (-).`,
    );
  }
  if (plugin.name.startsWith("-") || plugin.name.endsWith("-")) {
    throw new Error(
      `${prefix}Linter plugin name must start and end with a lowercase letter.`,
    );
  }
  if (plugin.name.includes("--")) {
    throw new Error(
      `${prefix}Linter plugin name must not have consequtive hyphens.`,
    );
  }
  if (typeof plugin.rules !== "object") {
    throw new Error(`${prefix}Linter plugin rules must be an object`);
  }
  if (state.installedPlugins.has(plugin.name)) {
    throw new Error(`Linter plugin ${plugin.name} has already been registered`);
  }
  state.plugins.push(plugin);
  state.installedPlugins.add(plugin.name);

  return {
    name: plugin.name,
    ruleNames: Object.keys(plugin.rules),
  };
}

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