fix(ci): rm workspace node_modules

lib/base-cmd.js

@@ -151,6 +151,19 @@ class BaseCommand {
     this.workspaceNames = [...ws.keys()]
     this.workspacePaths = [...ws.values()]
   }
+
+  /** commands like ci use workspace config but not --workspace */
+  async setWorkspaceFlagIndependent () {
+    this.workspace = new Map()
+    this.workspaceNames = []
+    this.workspacePaths = []
+
+    try {
+      await this.setWorkspaces({ forgiveFlagError: true })
+    } catch {
+      // noop
+    }
+  }
 }
 
 module.exports = BaseCommand

lib/commands/ci.js

@@ -33,6 +33,8 @@ class CI extends ArboristWorkspaceCmd {
       })
     }
 
+    await this.setWorkspaceFlagIndependent()
+
     const where = this.npm.prefix
     const Arborist = require('@npmcli/arborist')
     const opts = {
@@ -79,11 +81,14 @@ class CI extends ArboristWorkspaceCmd {
       // Only remove node_modules after we've successfully loaded the virtual
       // tree and validated the lockfile
       await time.start('npm-ci:rm', async () => {
-        const path = `${where}/node_modules`
-        // get the list of entries so we can skip the glob for performance
-        const entries = await fs.readdir(path, null).catch(() => [])
-        return Promise.all(entries.map(f => fs.rm(`${path}/${f}`,
-          { force: true, recursive: true })))
+        return await Promise.all([where, ...this.workspacePaths].map(async modulePath => {
+          const path = `${modulePath}/node_modules`
+          // get the list of entries so we can skip the glob for performance
+          const entries = await fs.readdir(path, null).catch(() => [])
+          return Promise.all(entries.map(f => {
+            return fs.rm(`${path}/${f}`, { force: true, recursive: true })
+          }))
+        }))
       })
     }