saadeghi/daisyui · error · Error

${flag} requires a value

Error message

${flag} requires a value

What it means

Thrown by takeValue in pr-preview.mjs when a flag that expects a value (--base-sha, --head-sha, --output, --browser, or --timeout) is the last token on the command line, so argv[index + 1] is undefined.

Source

Thrown at packages/tailwind-play-share/pr-preview.mjs:33

const usage = `Usage:
  bun packages/tailwind-play-share/pr-preview.mjs \\
    --base-sha <sha> \\
    --head-sha <sha> \\
    --output <path>

Options:
  --base-sha <sha>   Pull request base commit
  --head-sha <sha>   Pull request head commit
  --output <path>    Write the generated preview metadata as JSON
  --browser <path>   Chrome/Chromium executable
  --timeout <ms>     Timeout for each browser operation (default: ${defaultTimeoutMs})
  --verbose          Write Tailwind Play progress information to stderr
  --help             Show this help`

function takeValue(argv, index, flag) {
  const value = argv[index + 1]
  if (value === undefined) throw new Error(`${flag} requires a value`)
  return value
}

export function parsePreviewArgs(argv) {
  const options = {
    baseSha: undefined,
    browser: undefined,
    headSha: undefined,
    help: false,
    output: undefined,
    timeoutMs: defaultTimeoutMs,
    verbose: false,
  }

  for (let index = 0; index < argv.length; index += 1) {
    const argument = argv[index]
    switch (argument) {
      case "--base-sha":

View on GitHub (pinned to 42b09e637e)

Solutions

1. Provide the value immediately after the flag: `--base-sha <sha>`.
2. Quote the argument so the shell does not drop empty values.
3. Run with --help to see the expected option shape.

Example fix

// before
bun packages/tailwind-play-share/pr-preview.mjs --base-sha --head-sha abc --output out.json

// after
bun packages/tailwind-play-share/pr-preview.mjs --base-sha def --head-sha abc --output out.json

function flagHasValue(argv, flagIndex) {
  return argv[flagIndex + 1] !== undefined && !argv[flagIndex + 1].startsWith("--")
}

try {
  options = parsePreviewArgs(argv)
} catch (error) {
  if (/requires a value$/.test(error.message)) {
  // show usage and exit with a clear error
  }
  throw error
}

When it happens

Trigger: Invoking pr-preview.mjs with e.g. `--base-sha` and nothing after it, or the value being consumed as a different flag.

Common situations: A copy/paste CLI invocation missing the SHA, a shell that swallowed the value due to unquoted expansion, or a CI step that interpolates an empty variable (`--base-sha ${{ github.event.pull_request.base.sha }}` when empty).

Related errors

• Unknown option: ${argument}
• --timeout must be a positive number of milliseconds
• A daisyUI source file is required
• Unsupported daisyUI source file: ${sourceFile}
• ${flag} requires a value

AI-assisted analysis of saadeghi/daisyui@42b09e637e (2026-08-13). Data as JSON: /api/errors/513b0636c680af0e. Report an issue: GitHub.