guests/linux: Mount NFS in one command

plugins/guests/linux/cap/mount_nfs.rb

@@ -7,13 +7,17 @@ class MountNFS
         extend Vagrant::Util::Retryable
 
         def self.mount_nfs_folder(machine, ip, folders)
+          comm = machine.communicate
+
+          commands = []
+
           folders.each do |name, opts|
             # Expand the guest path so we can handle things like "~/vagrant"
             expanded_guest_path = machine.guest.capability(
               :shell_expand_guest_path, opts[:guestpath])
 
             # Do the actual creating and mounting
-            machine.communicate.sudo("mkdir -p #{expanded_guest_path}")
+            commands << "mkdir -p '#{expanded_guest_path}'"
 
             # Mount
             hostpath = opts[:hostpath].dup
@@ -26,18 +30,18 @@ def self.mount_nfs_folder(machine, ip, folders)
               mount_opts = opts[:mount_options].dup
             end
 
-            mount_command = "mount -o '#{mount_opts.join(",")}' #{ip}:'#{hostpath}' #{expanded_guest_path}"
-            retryable(on: Vagrant::Errors::LinuxNFSMountFailed, tries: 8, sleep: 3) do
-              machine.communicate.sudo(mount_command,
-                                       error_class: Vagrant::Errors::LinuxNFSMountFailed)
-            end
+            commands << "mount -o #{mount_opts.join(",")} '#{ip}:#{hostpath}' '#{expanded_guest_path}'"
+
+            # Emit a mount event
+            commands << <<-EOH.gsub(/^ {14}/, '')
+              if command -v /sbin/init &>/dev/null && /sbin/init --version | grep upstart &>/dev/null; then
+                /sbin/initctl emit --no-wait vagrant-mounted MOUNTPOINT='#{expanded_guest_path}'
+              fi
+            EOH
+          end
 
-            # Emit an upstart event if we can
-            machine.communicate.sudo <<-SCRIPT
-if command -v /sbin/init &>/dev/null && /sbin/init --version | grep upstart &>/dev/null; then
-  /sbin/initctl emit --no-wait vagrant-mounted MOUNTPOINT='#{expanded_guest_path}'
-fi
-SCRIPT
+          retryable(on: Vagrant::Errors::LinuxNFSMountFailed, tries: 8, sleep: 3) do
+            comm.sudo(commands.join("\n"), error_class: Vagrant::Errors::LinuxNFSMountFailed)
           end
         end
       end

test/unit/plugins/guests/linux/cap/mount_nfs_test.rb

@@ -0,0 +1,78 @@
+require_relative "../../../../base"
+
+describe "VagrantPlugins::GuestLinux::Cap::MountNFS" do
+  let(:caps) do
+    VagrantPlugins::GuestLinux::Plugin
+      .components
+      .guest_capabilities[:linux]
+  end
+
+  let(:machine) { double("machine") }
+  let(:comm) { VagrantTests::DummyCommunicator::Communicator.new(machine) }
+
+  before do
+    allow(machine).to receive(:communicate).and_return(comm)
+  end
+
+  after do
+    comm.verify_expectations!
+  end
+
+  describe ".mount_nfs_folder" do
+    let(:cap) { caps.get(:mount_nfs_folder) }
+
+    let(:ip) { "1.2.3.4" }
+
+    let(:hostpath) { "/host" }
+    let(:guestpath) { "/guest" }
+
+    before do
+      allow(machine).to receive(:guest).and_return(
+        double("capability", capability: guestpath)
+      )
+    end
+
+    it "mounts the folder" do
+      folders = {
+        "/vagrant-nfs" => {
+          type: :nfs,
+          guestpath: "/guest",
+          hostpath: "/host",
+        }
+      }
+      cap.mount_nfs_folder(machine, ip, folders)
+
+      expect(comm.received_commands[0]).to match(/mkdir -p '#{guestpath}'/)
+      expect(comm.received_commands[0]).to match(/'1.2.3.4:#{hostpath}' '#{guestpath}'/)
+    end
+
+    it "mounts with options" do
+      folders = {
+        "/vagrant-nfs" => {
+          type: :nfs,
+          guestpath: "/guest",
+          hostpath: "/host",
+          nfs_version: 2,
+          nfs_udp: true,
+        }
+      }
+      cap.mount_nfs_folder(machine, ip, folders)
+
+      expect(comm.received_commands[0]).to match(/mount -o vers=2,udp/)
+    end
+
+    it "emits an event" do
+      folders = {
+        "/vagrant-nfs" => {
+          type: :nfs,
+          guestpath: "/guest",
+          hostpath: "/host",
+        }
+      }
+      cap.mount_nfs_folder(machine, ip, folders)
+
+      expect(comm.received_commands[0]).to include(
+        "/sbin/initctl emit --no-wait vagrant-mounted MOUNTPOINT='#{guestpath}'")
+    end
+  end
+end