fix: invalid version error when modules not installed (#4859)

fix #4781
vuejs · Nov 26, 2019 · ef2cbae · ef2cbae
1 parent 2c13800
commit ef2cbae
Showing 1 changed file with 4 additions and 0 deletions.
diff --git a/packages/@vue/cli/lib/Upgrader.js b/packages/@vue/cli/lib/Upgrader.js
@@ -201,6 +201,10 @@ module.exports = class Upgrader {
         const installed = await this.pm.getInstalledVersion(name)
         const wanted = await this.pm.getRemoteVersion(name, range)
 
+        if (installed === 'N/A') {
+          throw new Error('At least one dependency is not installed. Please run npm install or yarn before trying to upgrade')
+        }
+
         let latest = await this.pm.getRemoteVersion(name)
         if (includeNext) {
           const next = await this.pm.getRemoteVersion(name, 'next')