getCommonBase() — vite Function Reference

Architecture documentation for the getCommonBase() function in importMetaGlob.ts from the vite codebase.

Function typescript PluginSystem AssetManagement called by 1

Entity Profile

PluginSystem→ AssetManagement→ getCommonBase() — vite Function Reference

Dependency Diagram

graph TD
  b2546add_ed59_4395_9214_0c3fc0d07b41["getCommonBase()"]
  b68d9c02_4026_8cfa_8eb1_35ec4a8f23cb["importMetaGlob.ts"]
  b2546add_ed59_4395_9214_0c3fc0d07b41 -->|defined in| b68d9c02_4026_8cfa_8eb1_35ec4a8f23cb
  a6007673_0baa_9293_6af0_ff74ed056981["transformGlobImport()"]
  a6007673_0baa_9293_6af0_ff74ed056981 -->|calls| b2546add_ed59_4395_9214_0c3fc0d07b41
  style b2546add_ed59_4395_9214_0c3fc0d07b41 fill:#6366f1,stroke:#818cf8,color:#fff

Relationship Graph

Source Code

packages/vite/src/node/plugins/importMetaGlob.ts lines 687–711

export function getCommonBase(globsResolved: string[]): null | string {
  const bases = globsResolved
    .filter((g) => g[0] !== '!')
    .map((glob) => {
      let { base } = picomatch.scan(glob)
      // `scan('a/foo.js')` returns `base: 'a/foo.js'`
      if (posix.basename(base).includes('.')) base = posix.dirname(base)

      return base
    })

  if (!bases.length) return null

  let commonAncestor = ''
  const dirS = bases[0].split('/')
  for (let i = 0; i < dirS.length; i++) {
    const candidate = dirS.slice(0, i + 1).join('/')
    if (bases.every((base) => base.startsWith(candidate)))
      commonAncestor = candidate
    else break
  }
  if (!commonAncestor) commonAncestor = '/'

  return commonAncestor
}