pcottle/learnGitBranching · error · GitError

git-error-args-few (lower: {}, what: git {method})

Error message

git-error-args-few (lower: {}, what: git {method})

What it means

CommandModel.validateArgBounds() checks the number of arguments against [lower, upper]. When args.length < lower it throws GitError('git-error-args-few') with the formatted lower bound and a 'what' string like 'with git {method}' or 'with {method} {option}'.

Source

Thrown at src/js/models/commandModel.js:241

  twoArgsForOrigin(args) {
    this.validateArgBounds(args, 0, 2);
  }

  impliedHead(args, min) {
    if(args.length == min) {
      args.push('HEAD');
    }
  }

  // this is a little utility class to help arg validation that happens over and over again
  validateArgBounds(args, lower, upper, option) {
    var what = (option === undefined) ?
      'git ' + this.get('method') :
      this.get('method') + ' ' + option + ' ';
    what = 'with ' + what;

    if (args.length < lower) {
      throw new GitError({
        msg: intl.str(
          'git-error-args-few',
          {
            lower: String(lower),
            what: what
          }
        )
      });
    }
    if (args.length > upper) {
      throw new GitError({
        msg: intl.str(
          'git-error-args-many',
          {
            upper: String(upper),
            what: what
          }
        )

View on GitHub (pinned to 5b09d0ff96)

Solutions

1. Supply the missing argument(s), e.g. the branch/ref name
2. If the arg should be implied (like HEAD), call argImpliedHead or pass defaults before validating
3. Audit custom command definitions' lower bound against actual usage

Example fix

// before
git branch
// after
git branch newbranch

if (args.length < lower) { reject(`this command needs at least ${lower} argument(s)`); }

function hasMinArgs(args, lower) {
  return Array.isArray(args) && args.length >= lower;
}

try { command.validateArgBounds(args, lower, upper); } catch (e) { if (e instanceof GitError && /few/.test(e.msg)) { promptForArg(); } else throw e; }

When it happens

Trigger: Calling validateArgBounds() (directly or via helpers argImpliedHead, oneArgImpliedOrigin, twoArgsForOrigin) with fewer arguments than the command requires — e.g. `git checkout` style commands invoked with no ref when one is required.

Common situations: Users omitting required ref/branch arguments; command shims forgetting to inject an implied HEAD arg before validating; refactoring a command's required-arg count without updating callers.

Understand the failure class

Background: "missing required argument" and "the following required arguments were not provided": what required-argument errors mean and how to fix them — this error's family across 20 libraries.

Related errors

• git-error-no-general-args
• git-error-args-many (upper: {}, what: git {method})
• Bad numeric argument: ' + generalArgs[1]
• --delete doesn't make sense without any refs

AI-assisted analysis of pcottle/learnGitBranching@5b09d0ff96 (2026-08-27). Data as JSON: /api/errors/67e961b8905db1a2. Report an issue: GitHub.