component/wkhtmltopdf: fix xz: no such file or directory

component/wkhtmltopdf/buildout.cfg

@@ -2,11 +2,11 @@
 
 extends = 
   ../fontconfig/buildout.cfg
+  ../xz-utils/buildout.cfg
   ../tar/buildout.cfg
   ../xorg/buildout.cfg
 
 parts =
-  tar
   wkhtmltopdf
 
 [wkhtmltopdf]
@@ -25,6 +25,7 @@ script =
   location = %(location)r
   self.failIfPathExists(location)
   import sys
+  import os
   ARCH_DIR_MAP = { 'x86': 'x86', 'x86-64': 'x86_64' }
   WK_SUFIX_MAP = { 'x86': 'i386', 'x86-64': 'amd64' }
   platform = guessPlatform()
@@ -35,7 +36,10 @@ script =
   extract_dir = tempfile.mkdtemp(self.name)
   self.cleanup_dir_list.append(extract_dir)
   self.logger.debug('Created working directory ' + repr(extract_dir))
-  call(["${tar:location}/bin/tar", "xJf", path, "-C", extract_dir])
+  env = os.environ.copy()
+  env["PATH"] = "${tar:location}/bin:${xz-utils:location}/bin" + (":" + env["PATH"] if env.get("PATH") else "")
+  env["LD_LIBRARY_PATH"] = "${xz-utils:location}/lib" + (":" + env["LD_LIBRARY_PATH"] if env.get("LD_LIBRARY_PATH") else "")
+  call(["tar", "xJf", path, "-C", extract_dir], env=env)
   shutil.move(os.path.join(extract_dir, "wkhtmltox"), location)
   wrapper_location = os.path.join("%(location)s", "wkhtmltopdf")
   wrapper = open(wrapper_location, 'w')