feat: add init workspaces

Add workspaces support to `npm init`

- Fixes `npm exec` respecting `script-shell` option value
- Refactored `lib/exec.js` into `libnpmexec`
- Updates init-package-json@2.0.3
- Added ability to create a new workspace using the -w config

PR-URL: https://github.com/npm/cli/pull/3095
Credit: @ruyadorno
Close: #3095
Reviewed-by: @wraithgar

3 files changed, 13 insertions, 9 deletions

diff --git a/tap-snapshots/test/lib/init.js.test.cjs b/tap-snapshots/test/lib/init.js.test.cjs
index 25015aab6..043d8b641 100644
--- a/tap-snapshots/test/lib/init.js.test.cjs
+++ b/tap-snapshots/test/lib/init.js.test.cjs
@@ -5,15 +5,14 @@
  * Make sure to inspect the output below.  Do not ignore changes!
  */
 'use strict'
-exports[`test/lib/init.js TAP classic npm init no args > should print helper info 1`] = `
-This utility will walk you through creating a package.json file.
-It only covers the most common items, and tries to guess sensible defaults.
+exports[`test/lib/init.js TAP workspaces no args > should print helper info 1`] = `
 
-See \`npm help init\` for definitive documentation on these fields
-and exactly what they do.
+`
+
+exports[`test/lib/init.js TAP workspaces no args, existing folder > should print helper info 1`] = `
+
+`
 
-Use \`npm install <pkg>\` afterwards to install a package and
-save it as a dependency in the package.json file.
+exports[`test/lib/init.js TAP workspaces with arg but missing workspace folder > should print helper info 1`] = `
 
-Press ^C at any time to quit.
 `
diff --git a/tap-snapshots/test/lib/utils/config/describe-all.js.test.cjs b/tap-snapshots/test/lib/utils/config/describe-all.js.test.cjs
index 6c2659062..ce520e748 100644
--- a/tap-snapshots/test/lib/utils/config/describe-all.js.test.cjs
+++ b/tap-snapshots/test/lib/utils/config/describe-all.js.test.cjs
@@ -966,7 +966,8 @@ installation of packages specified according to the pattern
 * Default: '/bin/sh' on POSIX systems, 'cmd.exe' on Windows
 * Type: null or String
 
-The shell to use for scripts run with the \`npm run\` command.
+The shell to use for scripts run with the \`npm exec\`, \`npm run\` and \`npm
+init <pkg>\` commands.
 
 #### \`searchexclude\`
 
diff --git a/tap-snapshots/test/lib/utils/npm-usage.js.test.cjs b/tap-snapshots/test/lib/utils/npm-usage.js.test.cjs
index e32d5e9f4..946cfba90 100644
--- a/tap-snapshots/test/lib/utils/npm-usage.js.test.cjs
+++ b/tap-snapshots/test/lib/utils/npm-usage.js.test.cjs
@@ -467,6 +467,10 @@ All commands:
                     npm init <@scope> (same as \`npx <@scope>/create\`)
                     npm init [<@scope>/]<name> (same as \`npx [<@scope>/]create-<name>\`)
                     
+                    Options:
+                    [-w|--workspace <workspace-name> [-w|--workspace <workspace-name> ...]]
+                    [-ws|--workspaces]
+                    
                     aliases: create, innit
                     
                     Run "npm help init" for more info