[core] do not use the task manager in batch command line tools

Avoid usage of multi-threading to launch the computation in command line
tools without interactive needs

meshroom/core/graph.py

@@ -1185,6 +1185,15 @@ class Graph(BaseObject):
         self.updateStatusFromCache(force=True)
         self.cacheDirChanged.emit()
 
+    def setVerbose(self, v):
+        with GraphModification(self):
+            for node in self._nodes:
+                if node.hasAttribute('verbose'):
+                    try:
+                        node.verbose.value = v
+                    except:
+                        pass
+
     nodes = Property(BaseObject, nodes.fget, constant=True)
     edges = Property(BaseObject, edges.fget, constant=True)
     filepathChanged = Signal()
@@ -1204,3 +1213,100 @@ def loadGraph(filepath):
     graph.load(filepath)
     graph.update()
     return graph
+
+
+def getAlreadySubmittedChunks(nodes):
+    out = []
+    for node in nodes:
+        for chunk in node.chunks:
+            if chunk.isAlreadySubmitted():
+                out.append(chunk)
+    return out
+
+
+def executeGraph(graph, toNodes=None, forceCompute=False, forceStatus=False):
+    """
+    """
+    if forceCompute:
+        nodes, edges = graph.dfsOnFinish(startNodes=toNodes)
+    else:
+        nodes, edges = graph.dfsToProcess(startNodes=toNodes)
+        chunksInConflict = getAlreadySubmittedChunks(nodes)
+
+        if chunksInConflict:
+            chunksStatus = set([chunk.status.status.name for chunk in chunksInConflict])
+            chunksName = [node.name for node in chunksInConflict]
+            msg = 'WARNING: Some nodes are already submitted with status: {}\nNodes: {}'.format(
+                  ', '.join(chunksStatus),
+                  ', '.join(chunksName)
+                  )
+            if forceStatus:
+                print(msg)
+            else:
+                raise RuntimeError(msg)
+
+    print('Nodes to execute: ', str([n.name for n in nodes]))
+
+    for node in nodes:
+        node.beginSequence(forceCompute)
+
+    for n, node in enumerate(nodes):
+        try:
+            multiChunks = len(node.chunks) > 1
+            for c, chunk in enumerate(node.chunks):
+                if multiChunks:
+                    print('\n[{node}/{nbNodes}]({chunk}/{nbChunks}) {nodeName}'.format(
+                        node=n+1, nbNodes=len(nodes),
+                        chunk=c+1, nbChunks=len(node.chunks), nodeName=node.nodeType))
+                else:
+                    print('\n[{node}/{nbNodes}] {nodeName}'.format(
+                        node=n + 1, nbNodes=len(nodes), nodeName=node.nodeType))
+                chunk.process(forceCompute)
+        except Exception as e:
+            logging.error("Error on node computation: {}".format(e))
+            graph.clearSubmittedNodes()
+            raise
+
+    for node in nodes:
+        node.endSequence()
+
+
+def submitGraph(graph, submitter, toNodes=None):
+    nodesToProcess, edgesToProcess = graph.dfsToProcess(startNodes=toNodes)
+    flowEdges = graph.flowEdges(startNodes=toNodes)
+    edgesToProcess = set(edgesToProcess).intersection(flowEdges)
+
+    if not nodesToProcess:
+        logging.warning('Nothing to compute')
+        return
+
+    logging.info("Nodes to process: {}".format(edgesToProcess))
+    logging.info("Edges to process: {}".format(edgesToProcess))
+
+    sub = None
+    if submitter:
+        sub = meshroom.core.submitters.get(submitter, None)
+    elif len(meshroom.core.submitters) == 1:
+        # if only one submitter available use it
+        sub = meshroom.core.submitters.values()[0]
+    if sub is None:
+        raise RuntimeError("Unknown Submitter: '{submitter}'. Available submitters are: '{allSubmitters}'.".format(
+            submitter=submitter, allSubmitters=str(meshroom.core.submitters.keys())))
+
+    try:
+        res = sub.submit(nodesToProcess, edgesToProcess, graph.filepath)
+        if res:
+            for node in nodesToProcess:
+                node.submit()  # update node status
+    except Exception as e:
+        logging.error("Error on submit : {}".format(e))
+
+
+def submit(graphFile, submitter, toNode=None):
+    """
+    Submit the given graph via the given submitter.
+    """
+    graph = loadGraph(graphFile)
+    toNodes = graph.findNodes([toNode]) if toNode else None
+    submitGraph(graph, submitter, toNodes)
+