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

1 files changed, 25 insertions, 0 deletions

diff --git a/lib/exec/get-workspace-location-msg.js b/lib/exec/get-workspace-location-msg.js
new file mode 100644
index 000000000..813b11e78
--- /dev/null
+++ b/lib/exec/get-workspace-location-msg.js
@@ -0,0 +1,25 @@
+const chalk = require('chalk')
+const readPackageJson = require('read-package-json-fast')
+
+const nocolor = {
+  dim: s => s,
+  green: s => s,
+}
+
+const getLocationMsg = async ({ color, path }) => {
+  const colorize = color ? chalk : nocolor
+  const { _id } =
+    await readPackageJson(`${path}/package.json`)
+      .catch(() => ({}))
+
+  const workspaceMsg = _id
+    ? ` in workspace ${colorize.green(_id)}`
+    : ` in a ${colorize.green('new')} workspace`
+  const locationMsg = ` at location:\n${
+    colorize.dim(path)
+  }`
+
+  return `${workspaceMsg}${locationMsg}`
+}
+
+module.exports = getLocationMsg