Search for included files first in the same location as the including module, then in the document root as a compatibility fallback. Fixes #217

1 files changed, 35 insertions, 0 deletions

diff --git a/src/fileutils.cc b/src/fileutils.cc
new file mode 100644
index 0000000..b844b4a
--- /dev/null
+++ b/src/fileutils.cc
@@ -0,0 +1,35 @@
+#include "fileutils.h"
+#include "printutils.h"
+
+#include <boost/filesystem.hpp>
+namespace fs = boost::filesystem;
+#include "boosty.h"
+
+/*!
+	Returns the absolute path to the given filename, unless it's empty.
+	If the file isn't found in the given path, the fallback path will be
+	used to be backwards compatible with <= 2013.01 (see issue #217).
+*/
+std::string lookup_file(const std::string &filename, 
+												const std::string &path, const std::string &fallbackpath)
+{
+	std::string resultfile;
+	if (!filename.empty() && !boosty::is_absolute(fs::path(filename))) {
+		fs::path absfile;
+		if (!path.empty()) absfile = boosty::absolute(fs::path(path) / filename);
+		fs::path absfile_fallback;
+		if (!fallbackpath.empty()) absfile_fallback = boosty::absolute(fs::path(fallbackpath) / filename);
+
+		if (!fs::exists(absfile) && fs::exists(absfile_fallback)) {
+			resultfile = absfile_fallback.string();
+			PRINTB("WARNING: Imported file (%s) found in document root instead of relative to the importing module. This behavior is deprecated", filename);
+		}
+		else {
+			resultfile = absfile.string();
+		}
+	}
+	else {
+		resultfile = filename;
+	}
+	return resultfile;
+}