Changeset 2438 for XIOS3/trunk/src/node/context.cpp

Timestamp:

12/07/22 13:07:07 (19 months ago)

Author:

jderouillat

Message:

Add the ability to specify the location of iodef through an environment variable XIOS_IODEF_PATH. Included XML sources can integrates environment variables

File:

• XIOS3/trunk/src/node/context.cpp (modified) (2 diffs)

XIOS3/trunk/src/node/context.cpp

@@ -35 +35 @@
 #include <chrono>
 #include <random>
+#include <unistd.h>
 
 namespace xios
@@ -162 +163 @@
       if (attributes.end() != attributes.find("src"))
       {
-         StdIFStream ifs ( attributes["src"].c_str() , StdIFStream::in );
+         string srcString = attributes["src"].c_str();
+
+         // check if environment variables
+         string srcKey;         
+         if (srcString.find("${") == 0) // src start wit
+         {
+           size_t envVarStart = srcString.find("${")+2; // +2 for ${
+           if (srcString.find("}") != std::string::npos)
+           {
+             size_t envVarEnd = srcString.find("}")-2;  // -2 (start @ srcString begining, not after ${
+             if(const char* var_path = std::getenv( srcString.substr( envVarStart, envVarEnd ).c_str() ) )
+             {
+               srcKey=string(var_path)+"/"+srcString.substr( srcString.find("}")+1, srcString.size()-srcString.find("}") );
+             }
+             else
+             {
+               ERROR("void CContext::parse(xml::CXMLNode & node)",
+                     <<endl<< "The src key " << attributes["src"].c_str()<< " contains an undefined variable." );
+             }
+           }
+           else
+           {
+             ERROR("void CContext::parse(xml::CXMLNode & node)",
+                   <<endl<< "The src key " << attributes["src"].c_str()<< " not defined correctly." );
+           }
+         }
+         else if (srcString.find("${") != 0)
+         {
+           ERROR("void CContext::parse(xml::CXMLNode & node)",
+                   <<endl<< "The src key " << attributes["src"].c_str()<< " should start with $" );
+         }
+         else if (srcString.find("$") != std::string::npos)
+         {
+           ERROR("void CContext::parse(xml::CXMLNode & node)",
+                   <<endl<< "The src key " << attributes["src"].c_str()<< " need { and }." );
+         }
+         else // standard behavor, without environment variable
+         {
+           srcKey = attributes["src"].c_str();
+         }
+         
+         StdIFStream ifs ( srcKey , StdIFStream::in );
          if ( (ifs.rdstate() & std::ifstream::failbit ) != 0 )
+         {
+            char currentPath[256];
+            getcwd(currentPath, sizeof(currentPath));
             ERROR("void CContext::parse(xml::CXMLNode & node)",
-                  <<endl<< "Can not open <"<<attributes["src"].c_str()<<"> file" );
+                  <<endl<< "Can not open <"<<attributes["src"].c_str()<<"> file "
+                  << "from iodef path : " << currentPath );
+         }
          if (!ifs.good())
             ERROR("CContext::parse(xml::CXMLNode & node)",