Function createDebugger

packages/vite/src/node/utils.ts:187–211

(
  namespace: ViteDebugScope,
  options: DebuggerOptions = {},
)

export type ViteDebugScope = `vite:${string}`

export function createDebugger(
  namespace: ViteDebugScope,
  options: DebuggerOptions = {},
): Debugger['log'] | undefined {
  const log = debug(namespace)
  const { onlyWhenFocused, depth } = options

  if (depth && log.inspectOpts && log.inspectOpts.depth == null) {
    log.inspectOpts.depth = options.depth
  }

  let enabled = log.enabled
  if (enabled && onlyWhenFocused) {
    const ns = typeof onlyWhenFocused === 'string' ? onlyWhenFocused : namespace
    enabled = !!DEBUG?.includes(ns)
  }

  if (enabled) {
    return (...args: [string, ...any[]]) => {
      if (!filter || args.some((a) => a?.includes?.(filter))) {
        log(...args)
      }
    }
  }
}

function testCaseInsensitiveFS() {
  if (!CLIENT_ENTRY.endsWith('client.mjs')) {