Completed updateStateDerivation(Path storepath) method

src/libexpr/primops.cc

@@ -623,8 +623,7 @@ static Expr prim_derivationStrict(EvalState & state, const ATermVector & args)
 	if(enableState && !disableState){
 		Path deriver = queryDeriver(noTxn, outPath);	//query deriver
 		if(deriver != drvPath){
-			printMsg(lvlError, format("Adding to the db: update drv `%2%' with `%1%'") % drvPath % deriver);
+			store->setUpdatedStateDerivation(drvPath, outPath);			
-			store->setUpdatedStateDerivation(drvPath, deriver);			
 		}
 	}
 

src/libstore/local-store.cc

@@ -1224,17 +1224,17 @@ PathSet LocalStore::getStateReferencesClosure(const Path & path)
 
 
 //TODO
-void setUpdatedStateDerivation(const Path & newdrv, const Path & olddrv)
+void setUpdatedStateDerivation(const Path & newdrv, const Path & storepath)
 {
 	Transaction txn(nixDB);
 
 	Strings data;
-	data.push_back(olddrv);
+	data.push_back(storepath);
 		
 	time_t timestamp;
   	time (&timestamp);
   	string timestamp_s = time_t2string(timestamp);
-	printMsg(lvlError, format("Adding new drv (%1%) to replace old drv (%2%) with timestamp: %3%") % newdrv % olddrv % timestamp_s);
+	printMsg(lvlError, format("Adding new drv (%1%) to replace drv of old component (%2%) with timestamp: %3%") % newdrv % storepath % timestamp_s);
 	data.push_back(timestamp_s);										//create a timestamp to remember which one was last inserted
 							
     nixDB.setStrings(txn, dbUpdatedDerivations, newdrv, data);
@@ -1245,54 +1245,65 @@ void setUpdatedStateDerivation(const Path & newdrv, const Path & olddrv)
 }
 
 //TODO
-void LocalStore::setUpdatedStateDerivation(const Path & newdrv, const Path & olddrv)
+void LocalStore::setUpdatedStateDerivation(const Path & newdrv, const Path & storepath)
 {
-	nix::setUpdatedStateDerivation(newdrv, olddrv);
+	nix::setUpdatedStateDerivation(newdrv, storepath);
 }
 
 //TODO
-Path getUpdatedStateDerivation(const Path & olddrv)		//TODO Path updateStateDerivationPath(const Path & storepath) 
+Path updateStateDerivation(const Path & storepath)		  
 {
-	Transaction txn(nixDB);			//TODO should u do a transaction here? ... this might delay the process ...
+	Transaction txn(nixDB);								
+
+	Path drvPath = queryDeriver(txn, storepath);
+	printMsg(lvlError, format("Current DRV: %1%") % drvPath);
 	
-	Path storepath = olddrv;		//TODO FIX
-	Path drvPath = getStateDerivation(storepath);
 	Path newDerivation = drvPath;					//the new drv path first equals the old one until a new one is found 
-	
+	int timestamp = 0;	
-	Strings keys;
 	
     //Get the (multiple) derivations of references    
+	Strings keys;
     nixDB.enumTable(txn, dbUpdatedDerivations, keys);
     for (Strings::iterator i = keys.begin(); i != keys.end(); ++i)
     {
-		string key = *i;
+		string drv_key = *i;	//the key is the derivation
-		printMsg(lvlError, format("getUpdatedStateDerivation KEY: `%1%'") % key);
 
 		Strings data;
-		nixDB.queryStrings(txn, dbUpdatedDerivations, key, data);
+		nixDB.queryStrings(txn, dbUpdatedDerivations, drv_key, data);
-	    for (Strings::iterator j = data.begin(); j != data.end(); ++j)
+	    string getstorepath = data.front();
-	    {
+	    data.pop_front();
-	    	printMsg(lvlError, format("getUpdatedStateDerivation: `%1%'") % *j);
+	    string gettimestamp =  data.front();
+	    
+	    if(storepath == getstorepath){
+	    	
+	    	int gettimestamp_i;
+	    	string2Int(gettimestamp, gettimestamp_i);
+	    	
+	    	if(gettimestamp_i == timestamp)
+	    		throw Error(format("Error! Multiple changes at the same time of derivation: `%1%' with timestamp") % drv_key);		//TODO delete the mulitple changes ??
+	    	
+	    	if(timestamp == 0 || gettimestamp_i > timestamp){		//we choose the new derivation as the latest submitted derivation
+	    		printMsg(lvlError, format("Replacing old drv (%1%) with new drv (%2%) with timestamp: %3%") % newDerivation % drv_key % gettimestamp_i);
+	    		newDerivation = drv_key;
+	    		timestamp = gettimestamp_i;
+	    		
+	    		//Replace the old deriver link in the derivers database (TODO, and delete old deriver path????????)
+				setDeriver(txn, storepath, newDerivation);
+	    	}
+	    	
+	    	//Always Remove the old updatelink in the dbUpdatedDerivations
+	    	nixDB.delPair(txn, dbUpdatedDerivations, drv_key);
 	    } 
-    }
+	}
-    
-    
-
-	//Set the current derivation of derivers
-	
-    
-    //if()
-   	//	throw Error(format("T derivation: `%1%'") % path);
     
     txn.commit();
-    
+    return newDerivation;
-    return p;
 }
 
 //TODO
-Path LocalStore::getUpdatedStateDerivation(const Path & olddrv)
+Path LocalStore::updateStateDerivation(const Path & storepath)
 {
-	return nix::getUpdatedStateDerivation(olddrv);
+	return nix::updateStateDerivation(storepath);
 }
 
 

src/libstore/local-store.hh

@@ -84,9 +84,9 @@ public:
 	
 	PathSet getStateReferencesClosure(const Path & path);
 	
-	void setUpdatedStateDerivation(const Path & newdrv, const Path & olddrv);
+	void setUpdatedStateDerivation(const Path & newdrv, const Path & storepath);
 
-	Path getUpdatedStateDerivation(const Path & olddrv);
+	Path updateStateDerivation(const Path & storepath);
 	
 };
 

src/libstore/remote-store.cc

@@ -403,13 +403,13 @@ PathSet RemoteStore::getStateReferencesClosure(const Path & path)
 }
 
 //TODO
-void RemoteStore::setUpdatedStateDerivation(const Path & newdrv, const Path & olddrv)
+void RemoteStore::setUpdatedStateDerivation(const Path & newdrv, const Path & storepath)
 {
 	
 }
 
 //TODO
-Path RemoteStore::getUpdatedStateDerivation(const Path & olddrv)
+Path RemoteStore::updateStateDerivation(const Path & storepath)
 {
 	Path p;
 	return p;

src/libstore/remote-store.hh

@@ -72,9 +72,9 @@ public:
 	
 	PathSet getStateReferencesClosure(const Path & path);
 	
-	void setUpdatedStateDerivation(const Path & newdrv, const Path & olddrv);
+	void setUpdatedStateDerivation(const Path & newdrv, const Path & storepath);
 
-	Path getUpdatedStateDerivation(const Path & olddrv);
+	Path updateStateDerivation(const Path & storepath);
 	
     
 private:

src/libstore/store-api.hh

@@ -194,10 +194,10 @@ public:
 	virtual PathSet getStateReferencesClosure(const Path & path) = 0;
 	
 	/* TODO */	
-	virtual void setUpdatedStateDerivation(const Path & newdrv, const Path & olddrv) = 0;
+	virtual void setUpdatedStateDerivation(const Path & newdrv, const Path & storepath) = 0;
 
 	/* TODO */	
-	virtual Path getUpdatedStateDerivation(const Path & olddrv) = 0;
+	virtual Path updateStateDerivation(const Path & storepath) = 0;
 	
 };
 

src/nix-state/nix-state.cc

@@ -229,14 +229,13 @@ void run(Strings args)
     Strings opFlags, opArgs;
     Operation op = 0;
 
+	/* test */
 	store = openStore();
-	Path p = "AADOLD";
+	Path p = "/nix/store/l569q3a2cfx834mcf3vhwczjgbaljnp7-hellohardcodedstateworld-1.0";
-	store->setUpdatedStateDerivation("NEW1", p);
+	store->setUpdatedStateDerivation("/nix/store/63xcbrk3v5nbn9qla7rwnx6rvz3iqm5l-hellohardcodedstateworld-1.0.drv", p);
-	store->setUpdatedStateDerivation("NEW2", p);
+	store->updateStateDerivation(p);
-	store->setUpdatedStateDerivation("NEW3", p);
-	store->getUpdatedStateDerivation(p);
-	
 	return;
+	/* test */
 
     for (Strings::iterator i = args.begin(); i != args.end(); ) {
         string arg = *i++;