Revert "Handle multiple lockfiles including Bun"

This reverts commit d1d25b6.

Author: Strengthless

README.md

@@ -159,9 +159,9 @@ team.
 
 - `--use-yarn`
 
- By default, patch-package checks whether you use npm, yarn or bun based on
- which lockfile you have. If you have multiple lockfiles, it uses npm by
- default. Set this option to override that default and always use yarn.
+ By default, patch-package checks whether you use npm or yarn based on which
+ lockfile you have. If you have both, it uses npm by default. Set this option
+ to override that default and always use yarn.
 
 - `--exclude <regexp>`
 

src/detectPackageManager.ts

@@ -29,7 +29,7 @@ function printSelectingDefaultMessage() {
  console.info(
  `${chalk.bold(
  "patch-package",
- )}: you have multiple lockfiles, e.g. yarn.lock and package-lock.json
+ )}: you have both yarn.lock and package-lock.json
 Defaulting to using ${chalk.bold("npm")}
 You can override this setting by passing --use-yarn or deleting
 package-lock.json if you don't need it
@@ -54,13 +54,7 @@ export const detectPackageManager = (
  const bunLockbExists = fs.existsSync(
  join(findWorkspaceRoot() ?? appRootPath, "bun.lockb"),
  )
- if (
- [
- packageLockExists || shrinkWrapExists,
- yarnLockExists,
- bunLockbExists,
- ].filter(Boolean).length > 1
- ) {
+ if ((packageLockExists || shrinkWrapExists) && yarnLockExists) {
  if (overridePackageManager) {
  return overridePackageManager
  } else {