refactor: add a function for corepack context detection

.changeset/sixty-bulldogs-pretend.md

@@ -0,0 +1,5 @@
+---
+"@pnpm/cli-meta": minor
+---
+
+Added isExecutedByCorepack.

cli/cli-meta/src/index.ts

@@ -39,3 +39,7 @@ export const packageManager = {
 export function detectIfCurrentPkgIsExecutable (proc: NodeJS.Process = process): boolean {
   return 'pkg' in proc && proc.pkg != null
 }
+
+export function isExecutedByCorepack (env: NodeJS.ProcessEnv = process.env): boolean {
+  return env.COREPACK_ROOT != null
+}

cli/cli-utils/src/packageIsInstallable.ts

@@ -1,5 +1,5 @@
 import { PnpmError } from '@pnpm/error'
-import { packageManager } from '@pnpm/cli-meta'
+import { isExecutedByCorepack, packageManager } from '@pnpm/cli-meta'
 import { logger, globalWarn } from '@pnpm/logger'
 import { checkPackage, UnsupportedEngineError, type WantedEngine } from '@pnpm/package-is-installable'
 import { type SupportedArchitectures } from '@pnpm/types'
@@ -24,7 +24,7 @@ export function packageIsInstallable (
   const currentPnpmVersion = packageManager.name === 'pnpm'
     ? packageManager.version
     : undefined
-  if (pkg.packageManager && !process.env.COREPACK_ROOT) {
+  if (pkg.packageManager && !isExecutedByCorepack()) {
     const [pmName, pmReference] = pkg.packageManager.split('@')
     if (pmName && pmName !== 'pnpm') {
       const msg = `This project is configured to use ${pmName}`

cli/default-reporter/src/reporterForClient/reportUpdateCheck.ts

@@ -1,5 +1,5 @@
 import { type UpdateCheckLog } from '@pnpm/core-loggers'
-import { detectIfCurrentPkgIsExecutable } from '@pnpm/cli-meta'
+import { detectIfCurrentPkgIsExecutable, isExecutedByCorepack } from '@pnpm/cli-meta'
 import boxen from 'boxen'
 import chalk from 'chalk'
 import * as Rx from 'rxjs'
@@ -54,7 +54,7 @@ function renderUpdateMessage (opts: UpdateMessageOptions): string {
 }
 
 function renderUpdateCommand (opts: UpdateMessageOptions): string {
-  if (opts.env.COREPACK_ROOT) {
+  if (isExecutedByCorepack(opts.env)) {
     return `corepack install -g pnpm@${opts.latestVersion}`
   }
   const pkgName = opts.currentPkgIsExecutable ? '@pnpm/exe' : 'pnpm'