resolveLibFilename() — vite Function Reference

Architecture documentation for the resolveLibFilename() function in build.ts from the vite codebase.

Function typescript ViteCore ConfigEngine calls 3 called by 1

Entity Profile

ViteCore→ ConfigEngine→ resolveLibFilename() — vite Function Reference

Dependency Diagram

graph TD
  fef76ea3_a24d_c3ab_a223_9dccb849d65f["resolveLibFilename()"]
  45981d85_cbdd_e969_8c88_c17072ea0eda["build.ts"]
  fef76ea3_a24d_c3ab_a223_9dccb849d65f -->|defined in| 45981d85_cbdd_e969_8c88_c17072ea0eda
  a016fb65_b1f4_be50_c5c3_d0c8f7b2ab52["resolveRolldownOptions()"]
  a016fb65_b1f4_be50_c5c3_d0c8f7b2ab52 -->|calls| fef76ea3_a24d_c3ab_a223_9dccb849d65f
  d0858125_c73b_0a0a_6dee_ba3fba7e64aa["findNearestMainPackageData()"]
  fef76ea3_a24d_c3ab_a223_9dccb849d65f -->|calls| d0858125_c73b_0a0a_6dee_ba3fba7e64aa
  fe8bc927_e27a_2239_42e3_9e3039ed9b56["getPkgName()"]
  fef76ea3_a24d_c3ab_a223_9dccb849d65f -->|calls| fe8bc927_e27a_2239_42e3_9e3039ed9b56
  60e05a5b_2625_e45f_63c4_c6eebc6e2d5b["resolveOutputJsExtension()"]
  fef76ea3_a24d_c3ab_a223_9dccb849d65f -->|calls| 60e05a5b_2625_e45f_63c4_c6eebc6e2d5b
  style fef76ea3_a24d_c3ab_a223_9dccb849d65f fill:#6366f1,stroke:#818cf8,color:#fff

Relationship Graph

Source Code

packages/vite/src/node/build.ts lines 959–990

export function resolveLibFilename(
  libOptions: LibraryOptions,
  format: ModuleFormat,
  entryName: string,
  root: string,
  extension?: JsExt,
  packageCache?: PackageCache,
): string {
  if (typeof libOptions.fileName === 'function') {
    return libOptions.fileName(format, entryName)
  }

  const packageJson = findNearestMainPackageData(root, packageCache)?.data
  const name =
    libOptions.fileName ||
    (packageJson && typeof libOptions.entry === 'string'
      ? getPkgName(packageJson.name)
      : entryName)

  if (!name)
    throw new Error(
      'Name in package.json is required if option "build.lib.fileName" is not provided.',
    )

  extension ??= resolveOutputJsExtension(format, packageJson?.type)

  if (format === 'cjs' || format === 'es') {
    return `${name}.${extension}`
  }

  return `${name}.${format}.${extension}`
}