guests/{free,net,open}bsd: Add `shell_expand_guest_path` capability

plugins/guests/freebsd/cap/shell_expand_guest_path.rb

@@ -0,0 +1,27 @@
+module VagrantPlugins
+  module GuestFreeBSD
+    module Cap
+      class ShellExpandGuestPath
+        def self.shell_expand_guest_path(machine, path)
+          real_path = nil
+          machine.communicate.execute("printf #{path}",
+                                      shell: "sh") do |type, data|
+            if type == :stdout
+              real_path ||= ""
+              real_path += data
+            end
+          end
+
+          if !real_path
+            # If no real guest path was detected, this is really strange
+            # and we raise an exception because this is a bug.
+            raise ShellExpandFailed
+          end
+
+          # Chomp the string so that any trailing newlines are killed
+          return real_path.chomp
+        end
+      end
+    end
+  end
+end

plugins/guests/freebsd/plugin.rb

@@ -30,6 +30,11 @@ module VagrantPlugins
         require_relative "cap/mount_nfs_folder"
         Cap::MountNFSFolder
       end
+
+      guest_capability("freebsd", "shell_expand_guest_path") do
+        require_relative "cap/shell_expand_guest_path"
+        Cap::ShellExpandGuestPath
+      end
     end
   end
 end

plugins/guests/netbsd/cap/shell_expand_guest_path.rb

@@ -0,0 +1,26 @@
+module VagrantPlugins
+  module GuestNetBSD
+    module Cap
+      class ShellExpandGuestPath
+        def self.shell_expand_guest_path(machine, path)
+          real_path = nil
+          machine.communicate.execute("printf #{path}") do |type, data|
+            if type == :stdout
+              real_path ||= ""
+              real_path += data
+            end
+          end
+
+          if !real_path
+            # If no real guest path was detected, this is really strange
+            # and we raise an exception because this is a bug.
+            raise ShellExpandFailed
+          end
+
+          # Chomp the string so that any trailing newlines are killed
+          return real_path.chomp
+        end
+      end
+    end
+  end
+end

plugins/guests/netbsd/plugin.rb

@@ -30,6 +30,11 @@ module VagrantPlugins
         require_relative "cap/mount_nfs_folder"
         Cap::MountNFSFolder
       end
+
+      guest_capability("netbsd", "shell_expand_guest_path") do
+        require_relative "cap/shell_expand_guest_path"
+        Cap::ShellExpandGuestPath
+      end
     end
   end
 end

plugins/guests/openbsd/cap/shell_expand_guest_path.rb

@@ -0,0 +1,26 @@
+module VagrantPlugins
+  module GuestOpenBSD
+    module Cap
+      class ShellExpandGuestPath
+        def self.shell_expand_guest_path(machine, path)
+          real_path = nil
+          machine.communicate.execute("printf #{path}") do |type, data|
+            if type == :stdout
+              real_path ||= ""
+              real_path += data
+            end
+          end
+
+          if !real_path
+            # If no real guest path was detected, this is really strange
+            # and we raise an exception because this is a bug.
+            raise ShellExpandFailed
+          end
+
+          # Chomp the string so that any trailing newlines are killed
+          return real_path.chomp
+        end
+      end
+    end
+  end
+end

plugins/guests/openbsd/plugin.rb

@@ -30,6 +30,11 @@ module VagrantPlugins
         require_relative "cap/mount_nfs_folder"
         Cap::MountNFSFolder
       end
+
+      guest_capability("openbsd", "shell_expand_guest_path") do
+        require_relative "cap/shell_expand_guest_path"
+        Cap::ShellExpandGuestPath
+      end
     end
   end
 end