1 files changed, 33 insertions, 0 deletions
diff --git a/deps/npm/lib/workspaces/get-workspaces.js b/deps/npm/lib/workspaces/get-workspaces.js
new file mode 100644
index 0000000000..64812d5403
--- /dev/null
+++ b/deps/npm/lib/workspaces/get-workspaces.js
@@ -0,0 +1,33 @@
+const { resolve } = require('path')
+const mapWorkspaces = require('@npmcli/map-workspaces')
+const minimatch = require('minimatch')
+const rpj = require('read-package-json-fast')
+
+const getWorkspaces = async (filters, { path }) => {
+  const pkg = await rpj(resolve(path, 'package.json'))
+  const workspaces = await mapWorkspaces({ cwd: path, pkg })
+  const res = filters.length ? new Map() : workspaces
+
+  for (const filterArg of filters) {
+    for (const [workspaceName, workspacePath] of workspaces.entries()) {
+      if (filterArg === workspaceName
+        || resolve(path, filterArg) === workspacePath
+        || minimatch(workspacePath, `${resolve(path, filterArg)}/*`))
+        res.set(workspaceName, workspacePath)
+    }
+  }
+
+  if (!res.size) {
+    let msg = '!'
+    if (filters.length) {
+      msg = `:\n ${filters.reduce(
+        (res, filterArg) => `${res} --workspace=${filterArg}`, '')}`
+    }
+
+    throw new Error(`No workspaces found${msg}`)
+  }
+
+  return res
+}
+
+module.exports = getWorkspaces