Handle relative paths in Client.removeDir()

Fixes #207

Author: patrickjuchli

src/Client.ts

@@ -604,10 +604,13 @@ export class Client {
     async removeDir(remoteDirPath: string): Promise<void> {
         return this._exitAtCurrentDirectory(async () => {
             await this.cd(remoteDirPath)
+            // Get the absolute path of the target because remoteDirPath might be a relative path, even `../` is possible.
+            const absoluteDirPath = await this.pwd()
             await this.clearWorkingDir()
-            if (remoteDirPath !== "/") {
+            const dirIsRoot = absoluteDirPath === "/"
+            if (!dirIsRoot) {
                 await this.cdup()
-                await this.removeEmptyDir(remoteDirPath)
+                await this.removeEmptyDir(absoluteDirPath)
             }
         })
     }