incremental compilation: simple recompilation works

compiler/modules.nim

@@ -67,6 +67,7 @@ proc compileModule*(graph: ModuleGraph; fileIdx: FileIndex; flags: TSymFlags): P
       graph.config.mainPackageId = result.owner.id
 
     result.id = getModuleId(graph, fileIdx, AbsoluteFile toFullPath(graph.config, fileIdx))
+    registerModule(graph, result)
     discard processModule(graph, result,
       if sfMainModule in flags and graph.config.projectIsStdin: stdin.llStreamOpen else: nil)
   elif graph.isDirty(result):
@@ -128,6 +129,7 @@ proc compileProject*(graph: ModuleGraph; projectFileIdx = InvalidFileIDX) =
 proc makeModule*(graph: ModuleGraph; filename: AbsoluteFile): PSym =
   result = graph.newModule(fileInfoIdx(graph.config, filename))
   result.id = getID()
+  registerModule(graph, result)
 
 proc makeModule*(graph: ModuleGraph; filename: string): PSym =
   result = makeModule(graph, AbsoluteFile filename)

compiler/rod.nim

@@ -22,6 +22,8 @@ when not nimIncremental:
 
   template storeRemaining*(g: ModuleGraph; module: PSym) = discard
 
+  template registerModule*(g: ModuleGraph; module: PSym) = discard
+
 else:
   include rodimpl
 

compiler/rodimpl.nim

@@ -752,6 +752,9 @@ proc loadSym(g; id: int; info: TLineInfo): PSym =
   result = loadSymFromBlob(g, b, info)
   doAssert id == result.id, "symbol ID is not consistent!"
 
+proc registerModule*(g; module: PSym) =
+  g.incr.r.syms.add(abs module.id, module)
+
 proc loadModuleSymTab(g; module: PSym) =
   ## goal: fill  module.tab
   g.incr.r.syms.add(module.id, module)
@@ -868,6 +871,7 @@ proc setupModuleCache*(g: ModuleGraph) =
   let dbfile = getNimcacheDir(g.config) / RelativeFile"rodfiles.db"
   if g.config.symbolFiles == writeOnlySf:
     removeFile(dbfile)
+  createDir getNimcacheDir(g.config)
   if not fileExists(dbfile):
     db = open(connection=string dbfile, user="nim", password="",
               database="nim")

compiler/scriptconfig.nim

@@ -159,6 +159,8 @@ proc setupVM*(module: PSym; cache: IdentCache; scriptName: string;
 proc runNimScript*(cache: IdentCache; scriptName: AbsoluteFile;
                    freshDefines=true; conf: ConfigRef) =
   rawMessage(conf, hintConf, scriptName.string)
+  let oldSymbolFiles = conf.symbolFiles
+  conf.symbolFiles = disabledSf
 
   let graph = newModuleGraph(cache, conf)
   connectCallbacks(graph)
@@ -184,3 +186,4 @@ proc runNimScript*(cache: IdentCache; scriptName: AbsoluteFile;
   #initDefines()
   undefSymbol(conf.symbols, "nimscript")
   undefSymbol(conf.symbols, "nimconfig")
+  conf.symbolFiles = oldSymbolFiles