Make sure TMPDIR is created before we use it.

features/support/hooks.rb

@@ -5,6 +5,23 @@ require 'tmpdir'
 
 # Run once, before any feature
 AfterConfiguration do |config|
+  if File.exist?($config["TMPDIR"])
+    if !File.directory?($config["TMPDIR"])
+      raise "Temporary directory '#{$config["TMPDIR"]}' exists but is not a " +
+            "directory"
+    end
+    if !File.owned?($config["TMPDIR"])
+      raise "Temporary directory '#{$config["TMPDIR"]}' must be owned by the " +
+            "current user"
+    end
+    FileUtils.chmod(0755, $config["TMPDIR"])
+  else
+    begin
+      Dir.mkdir($config["TMPDIR"])
+    rescue Errno::EACCES => e
+      raise "Cannot create temporary directory: #{e.to_s}"
+    end
+  end
   # Start a thread that monitors a pseudo fifo file and debug_log():s
   # anything written to it "immediately" (well, as fast as inotify
   # detects it). We're forced to a convoluted solution like this
@@ -50,23 +67,6 @@ def add_after_scenario_hook(&block)
 end
 
 BeforeFeature('@product') do |feature|
-  if File.exist?($config["TMPDIR"])
-    if !File.directory?($config["TMPDIR"])
-      raise "Temporary directory '#{$config["TMPDIR"]}' exists but is not a " +
-            "directory"
-    end
-    if !File.owned?($config["TMPDIR"])
-      raise "Temporary directory '#{$config["TMPDIR"]}' must be owned by the " +
-            "current user"
-    end
-    FileUtils.chmod(0755, $config["TMPDIR"])
-  else
-    begin
-      Dir.mkdir($config["TMPDIR"])
-    rescue Errno::EACCES => e
-      raise "Cannot create temporary directory: #{e.to_s}"
-    end
-  end
   delete_all_snapshots if !KEEP_SNAPSHOTS
   if TAILS_ISO.nil?
     raise "No Tails ISO image specified, and none could be found in the " +