chore: prepare update scripts for Corepack global install

docs/MAINTENANCE.md

@@ -22,12 +22,6 @@ _The previous [examples/v9](https://github.com/cypress-io/github-action/tree/v5/
 
 - [corepack](https://github.com/nodejs/corepack). This is currently installed with [Node.js](https://nodejs.org/). Due to plans of Node.js to remove it in versions Node.js `25.x` and later, you may need to install it separately with `npm install -g corepack`.
 
-- [pnpm](https://pnpm.io/) installed through:
-
-```bash
-npm install pnpm@latest -g
-```
-
 - [Visual Studio Code](https://code.visualstudio.com/) or other editor
 
 Under Microsoft Windows it may be necessary to also execute the following preparatory command:
@@ -52,6 +46,10 @@ This updates all [examples](../examples) to cypress@latest.
 
 After updating the examples locally, they can be committed with git and a pull request opened on GitHub.
 
+### Updating pnpm examples
+
+The script [/scripts/update-cypress-latest-pnpm.sh](../scripts/update-cypress-latest-pnpm.sh) (which is invoked through `npm run update:cypress` to update the pnpm examples) runs [pnpm](https://pnpm.io/) as an `npm` global install. It leaves pnpm installed and Corepack disabled for pnpm on completion.
+
 ### Updating Yarn examples
 
-The script [/scripts/update-cypress-latest-yarn.sh](../scripts/update-cypress-latest-yarn.sh) (which is invoked through `npm run update:cypress` to update the Yarn examples) runs [Yarn 1 (Classic)](https://classic.yarnpkg.com/) as an `npm` global install, runs [Yarn Modern](https://yarnpkg.com/) through Corepack and returns Corepack to its default disabled state on completion.
+The script [/scripts/update-cypress-latest-yarn.sh](../scripts/update-cypress-latest-yarn.sh) (which is invoked through `npm run update:cypress` to update the Yarn examples) runs [Yarn 1 (Classic)](https://classic.yarnpkg.com/) as an `npm` global install and runs [Yarn Modern](https://yarnpkg.com/) through Corepack. It leaves Yarn Classic installed and Corepack disabled for Yarn on completion.

scripts/check-package-manager-corepack.sh

@@ -0,0 +1,15 @@
+#!/bin/bash
+# This script checks that the prerequisite
+# Corepack is installed
+
+if ! command -v corepack &> /dev/null
+then
+    echo **Corepack not installed**
+    echo execute the following command:
+    echo npm install corepack@latest -g
+    echo if npm install fails then reinstall Node.js and try again
+    echo
+exit 1 # failure
+else
+    echo corepack version $(corepack --version) is installed
+fi

scripts/check-package-manager-npm.sh

@@ -4,12 +4,11 @@
 
 if ! command -v npm &> /dev/null
 then
-    echo "**npm is required and not installed**"
-    echo "install Node.js LTS from:"
-    echo "https://nodejs.org/en/"
-    echo "or install and use nvm"
+    echo **npm is required and not installed**
+    echo install Node.js LTS from:
+    echo https://nodejs.org/en/download
     echo
 exit 1 # failure
 else
-    echo "npm is installed"
+    echo npm version $(npm --version) is installed
 fi

scripts/update-cypress-latest-pnpm.sh

@@ -4,9 +4,22 @@ set -e # fail on error
 # Examples using the pnpm package manager are
 # updated to Cypress latest version
 #
+# npm must be installed before running this script.
+./scripts/check-package-manager-npm.sh
+
 # Make sure that pnpm is installed
-./scripts/check-package-manager-pnpm.sh
+if command -v corepack &> /dev/null
+then
+    echo disabling Corepack for pnpm
+    corepack disable pnpm
+else
+    echo Corepack is not needed and not installed
+fi
+echo install latest pnpm version
+npm add pnpm@latest -g
+echo pnpm version $(pnpm --version) is installed
 
+echo
 echo updating pnpm examples to Cypress latest version
 cd examples
 

scripts/update-cypress-latest-yarn.sh

@@ -3,14 +3,14 @@ set -e # fail on error
 #
 if ! command -v corepack &> /dev/null
 then
-    echo "**corepack is required and not installed**"
-    echo "Refer to Yarn Modern installation instructions"
-    echo "https://yarnpkg.com/getting-started/install"
-    echo "https://yarnpkg.com/corepack"
+    echo **corepack is required and not installed**
+    echo Refer to Yarn Modern installation instructions
+    echo https://yarnpkg.com/getting-started/install
+    echo https://yarnpkg.com/corepack
     echo
 exit 1 # failure
 else
-    echo "corepack is installed"
+    echo corepack version $(corepack --version) is installed
 fi
 #
 # Examples using the yarn package manager are
@@ -26,6 +26,7 @@ cd examples
 # No corepack
 corepack disable yarn
 npm install yarn@latest -g
+echo yarn version $(yarn --version) is installed
 
 # examples/start-and-yarn-workspaces (yarn)
 echo
@@ -64,6 +65,7 @@ echo
 echo updating examples/yarn-modern to cypress@latest
 cd yarn-modern
 yarn set version latest
+echo yarn version $(yarn --version) is installed
 yarn add cypress --dev --exact
 cd ..
 
@@ -72,12 +74,16 @@ echo
 echo updating examples/yarn-modern-pnp to cypress@latest
 cd yarn-modern-pnp
 yarn set version latest
+echo yarn version $(yarn --version) is installed
 yarn add cypress --dev --exact
 cd ..
 
+echo
 corepack disable yarn
-echo "corepack is now disabled for Yarn"
+echo corepack is now disabled for Yarn
 npm install yarn@latest -g
+echo yarn version $(yarn --version) is installed
+echo
 # End of Yarn 4 Modern section
 # --------------------------------------------------
 

scripts/update-cypress-latest.sh

@@ -4,13 +4,12 @@ set -e # fail on error
 # All examples are updated to Cypress latest version
 #
 # Make sure that Node.js LTS from https://nodejs.org/en/ is installed before running.
-# Ensure pnpm is installed.
-# npm install pnpm -g
+
 # The VScode editor is also used in the last step if available.
 #
 # First check if the required package managers are installed
 ./scripts/check-package-manager-npm.sh
-./scripts/check-package-manager-pnpm.sh
+./scripts/check-package-manager-corepack.sh
 # then proceed to updating the examples
 echo
 ./scripts/update-cypress-latest-npm.sh