Setting the correct work directory in FunctionExternalCommand

* changed the XObjectValue constructor to accept a pointer to FilesystemContext instead of instantiating the context by itself
* the FilesystemContext is now instantiated in the "callConstructDocument" member method of "FunctionBase"
** a const reference to FilesystemContext is passed to all "constructDocument" member method implementations
* the FilesystemContext is currently only used by FunctionExternal command to set the correct work directory in "boost::process::context"
** this is required so calling external commands from inside a stylesheet works as expected
*** i.e. from inside the directory the stylesheet is located in
* modified all remaining external function implementations accordingly

1 files changed, 3 insertions, 1 deletions

diff --git a/src/function/read_file.cc b/src/function/read_file.cc
index 42cb4a4..3718f04 100644
--- a/src/function/read_file.cc
+++ b/src/function/read_file.cc
@@ -60,7 +60,9 @@ boost::optional<std::string> readPlainFile(
 namespace InputXSLT {
 
 DomDocumentCache::document_ptr FunctionReadFile::constructDocument(
-	boost::filesystem::path filePath) const {
+	const FilesystemContext&,
+	boost::filesystem::path  filePath
+) const {
 	DomDocumentCache::document_ptr domDocument(
 		DomDocumentCache::createDocument("content")
 	);