+def env_toc(target, source, env):
+ '''Generate target from source files'''
+ # this is very tricky because we need to use installed lyx2lyx with
+ # correct lyx2lyx_version.py
+ sys.path.append(env['LYX2LYX_DEST'])
+ sys.path.append(env.Dir('$TOP_SRCDIR/lib/doc').abspath)
+ import doc_toc
+ # build toc
+ doc_toc.build_toc(str(target[0]), [file.abspath for file in source])
+
+
+def env_cat(target, source, env):
+ '''Cat source > target. Avoid pipe to increase portability'''
+ output = open(env.File(target[0]).abspath, 'w')
+ for src in source:
+ input = open(env.File(src).abspath)
+ output.write(input.read())
+ input.close()
+ output.close()
+
+