From afb6634b453cd9ad698a7b53d39d62392663be32 Mon Sep 17 00:00:00 2001
From: Jan Huwald <jh@sotun.de>
Date: Thu, 13 Feb 2014 13:33:46 +0100
Subject: allow reading .scad files from standard input

This patch loads the root source code form standard input if "-" is
given as file name. In this case handle_dep() is disabled for the root
module but still executed for all included files.

diff --git a/src/openscad.cc b/src/openscad.cc
index 12e22ce..a5c56f6 100644
--- a/src/openscad.cc
+++ b/src/openscad.cc
@@ -254,17 +254,24 @@ int cmdline(const char *deps_output_file, const std::string &filename, Camera &c
 	AbstractNode *absolute_root_node;
 	CGAL_Nef_polyhedron root_N;
 
-	handle_dep(filename.c_str());
-
-	std::ifstream ifs(filename.c_str());
-	if (!ifs.is_open()) {
-		PRINTB("Can't open input file '%s'!\n", filename.c_str());
-		return 1;
+	std::string text, parentpath;
+	if (filename != "-") {
+	  handle_dep(filename);
+
+	  std::ifstream ifs(filename.c_str());
+	  if (!ifs.is_open()) {
+	    PRINTB("Can't open input file '%s'!\n", filename.c_str());
+	    return 1;
+	  }
+	  text = std::string((std::istreambuf_iterator<char>(ifs)), std::istreambuf_iterator<char>());
+	  fs::path abspath = boosty::absolute(filename);
+	  parentpath = boosty::stringy(abspath.parent_path());
+	}else{
+	  text = std::string((std::istreambuf_iterator<char>(std::cin)), std::istreambuf_iterator<char>());
+	  parentpath = boosty::stringy(original_path);
 	}
-	std::string text((std::istreambuf_iterator<char>(ifs)), std::istreambuf_iterator<char>());
 	text += "\n" + commandline_commands;
-	fs::path abspath = boosty::absolute(filename);
-	std::string parentpath = boosty::stringy(abspath.parent_path());
+
 	root_module = parse(text.c_str(), parentpath.c_str(), false);
 	if (!root_module) {
 		PRINTB("Can't parse file '%s'!\n", filename.c_str());
-- 
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