create install directory if not already exists

pedi.cpp

@@ -17,6 +17,33 @@
 
 using namespace std;
 
+int mkpath(const string& path, const mode_t& mode)
+{
+	auto s=path;
+    	auto pos=(size_t)0;
+
+	if(s[s.size()-1]!='/')
+	{
+		// force trailing / so we can handle everything in loop
+		s+='/';
+	}
+
+	// Caution! side effect in the while loop!
+	while((pos=s.find_first_of('/',pos))!=string::npos)
+	{
+		auto dir=s.substr(0,pos++);
+		if(dir.size()==0) 
+			continue; // if leading / first time is 0 length
+
+		auto mdret=mkdir(dir.c_str(),mode);
+		if(mdret!=0 && errno!=EEXIST)
+		{
+			return mdret;
+		}
+	}
+	return 0;
+}
+
 // Parse some options for the transform
 static struct option long_options[] = {
 	{"setup", no_argument, 0, 's'},
@@ -516,21 +543,6 @@ void read_configs()
 	auto orig_configfile=trimmed(mf)+".config";
 
 	read_config(orig_configfile, my_options.install_dir, my_options.labels);
-
-#if 0
-	for(const auto & s : manifest_files)
-	{
-		string install_dir, labels;
-		auto configfile=trimmed(s)+".config";
-		read_config(configfile, install_dir, labels);
-
-		if(my_options.install_dir != install_dir || my_options.labels != labels)
-		{
-			cerr<<"Mismatch configuration in "<<orig_configfile<<" and "<<configfile<<endl;
-			exit(1);
-		}
-	}
-#endif
 }
 
 auto previously_had_pedi_root=false;
@@ -640,6 +652,12 @@ void finish()
 {
 	if(!configs_read || previously_had_pedi_root)
 	{
+		auto mkpath_err=mkpath(my_options.install_dir, S_IRUSR | S_IWUSR | S_IXUSR);
+		if(mkpath_err != 0 )
+		{
+			cout << " Could not make directory " << my_options.install_dir << endl;
+			exit(1);
+		}
 		ofstream o(my_options.install_dir+"/"+".pedi_root");
 		if(my_options.verbose)
 			cout<<"Writing pedi_root file."<<endl;