packageManagerForBase() — tailwindcss Function Reference

Architecture documentation for the packageManagerForBase() function in packages.ts from the tailwindcss codebase.

Function typescript CommandLineInterface Codemods calls 1

Entity Profile

CommandLineInterface→ Codemods→ packageManagerForBase() — tailwindcss Function Reference

Dependency Diagram

graph TD
  f9fc76b6_5e68_f997_f790_5f5925280d18["packageManagerForBase()"]
  3570f589_2f69_c1ce_f4d4_16edf9b89280["packages.ts"]
  f9fc76b6_5e68_f997_f790_5f5925280d18 -->|defined in| 3570f589_2f69_c1ce_f4d4_16edf9b89280
  f01ffd27_4737_8e3c_147a_bc30c19a4b4d["warn()"]
  f9fc76b6_5e68_f997_f790_5f5925280d18 -->|calls| f01ffd27_4737_8e3c_147a_bc30c19a4b4d
  style f9fc76b6_5e68_f997_f790_5f5925280d18 fill:#6366f1,stroke:#818cf8,color:#fff

Relationship Graph

Source Code

packages/@tailwindcss-upgrade/src/utils/packages.ts lines 77–138

let packageManagerForBase = new DefaultMap(async (base) => {
  do {
    // 1. Check package.json for a `packageManager` field
    let packageJsonPath = resolve(base, 'package.json')
    try {
      let packageJsonContent = await fs.readFile(packageJsonPath, 'utf-8')
      let packageJson = JSON.parse(packageJsonContent)
      if (packageJson.packageManager) {
        if (packageJson.packageManager.includes('bun')) {
          return 'bun'
        }
        if (packageJson.packageManager.includes('yarn')) {
          return 'yarn'
        }
        if (packageJson.packageManager.includes('pnpm')) {
          return 'pnpm'
        }
        if (packageJson.packageManager.includes('npm')) {
          return 'npm'
        }
      }
    } catch {}

    // 2. Check for common lockfiles
    try {
      await fs.access(resolve(base, 'bun.lockb'))
      return 'bun'
    } catch {}
    try {
      await fs.access(resolve(base, 'bun.lock'))
      return 'bun'
    } catch {}
    try {
      await fs.access(resolve(base, 'pnpm-lock.yaml'))
      return 'pnpm'
    } catch {}

    try {
      await fs.access(resolve(base, 'yarn.lock'))
      return 'yarn'
    } catch {}

    try {
      await fs.access(resolve(base, 'package-lock.json'))
      return 'npm'
    } catch {}

    // 3. If no lockfile is found, we might be in a monorepo
    let previousBase = base
    base = dirname(base)

    // Already at the root
    if (previousBase === base) {
      if (!didWarnAboutPackageManager) {
        didWarnAboutPackageManager = true
        warn('Could not detect a package manager. Please manually update `tailwindcss` to v4.')
      }

      return Promise.reject('No package manager detected')
    }
  } while (true)
})