Function findRemoteBase

src/utils/git.ts:577–618

()

 * Priority: tracking branch > origin/main > origin/staging > origin/master
 */
export async function findRemoteBase(): Promise<string | null> {
  // First try: get the tracking branch for the current branch
  const { stdout: trackingBranch, code: trackingCode } = await execFileNoThrow(
    gitExe(),
    ['rev-parse', '--abbrev-ref', '--symbolic-full-name', '@{u}'],
    { preserveOutputOnError: false },
  )

  if (trackingCode === 0 && trackingBranch.trim()) {
    return trackingBranch.trim()
  }

  // Second try: check for common default branch names on origin
  const { stdout: remoteRefs, code: remoteCode } = await execFileNoThrow(
    gitExe(),
    ['remote', 'show', 'origin', '--', 'HEAD'],
    { preserveOutputOnError: false },
  )

  if (remoteCode === 0) {
    // Parse the default branch from remote show output
    const match = remoteRefs.match(/HEAD branch: (\S+)/)
    if (match && match[1]) {
      return `origin/${match[1]}`
    }
  }

  // Third try: check which common branches exist
  const candidates = ['origin/main', 'origin/staging', 'origin/master']
  for (const candidate of candidates) {
    const { code } = await execFileNoThrow(
      gitExe(),
      ['rev-parse', '--verify', candidate],
      { preserveOutputOnError: false },
    )
    if (code === 0) {
      return candidate
    }
  }

  return null
}

/**
 * Check if we're in a shallow clone by looking for <gitDir>/shallow.