Arvados

Feature #10268

Updated by Peter Amstutz about 8 years ago

Wrote this up as a code sample for customer, but may want to incorporate it into SDK: 

 <pre> 
 import arvados 
 from arvados.collection import RichCollectionBase 
 from arvados.arvfile import ArvadosFile 

 api = arvados.api('v1') 

 def follow_path(path, parent=None): 
     if isinstance(path, basestring): 
         path = path.split("/") 

     if parent is None: 
         scope = path.pop(0) 
         current_user = api.users().current().execute() 
         if scope == "home": 
             parent = current_user["uuid"] 
         elif scope == "shared": 
             startproject = path.pop(0) 
             projects = api.groups().list(filters=[["name", "=", startproject]]).execute() 
             if len(projects["items"]) == 1: 
                 parent = projects["items"][0]["uuid"] 
             elif len(projects["items"]) == 0: 
                 raise Exception("Starting project '%s' not found" % startproject) 
             else: 
                 raise Exception("Found multiple starting projects named '%s'" % (startproject)) 
         else: 
             raise Exception("First path segment must be one of 'home' or 'shared'") 

     if len(path) == 0: 
         return parent 

     # Look for projects with the next name in the path list 
     name = path.pop(0) 
     l = api.groups().list(filters=[["owner_uuid", "=", parent], ["name", "=", name]]).execute() 
     if l["items"]: 
         return follow_path(path, l["items"][0]["uuid"]) 

     # Look for collections with the next name in the path list 
     l = api.collections().list(filters=[["owner_uuid", "=", parent], ["name", "=", name]]).execute() 
     if l["items"]: 
         cr = arvados.collection.CollectionReader(l["items"][0]["uuid"]) 
         if path: 
             f = cr.find("/".join(path)) 
             if f: 
                 return f 
             else: 
                 raise Exception("path '%s' not found in collection %s" % ("/".join(path), cr.manifest_locator())) 
         else: 
             return cr 

     raise Exception("Can't find subproject or collection named '%s' under project %s" % (name, parent)) 

 #path = "home/Tools/Examples and templates/Config template for example pipeline/example.config" 
 #path = "home/Tools/Examples and templates/Config template for example pipeline" 
 #path = "home/Tools/Examples and templates" 
 #path = "home/Tools" 
 #path = "shared/New project" 
 #path = "shared/Examples and templates" 

 leaf = follow_path(path) 

 if isinstance(leaf, basestring): 
     print "Resolved to project uuid %s" % leaf 

 if isinstance(leaf, RichCollectionBase): 
     print "Resolved to directory '%s' within collection %s" % (leaf.stream_name(), leaf.root_collection().manifest_locator()) 

 if isinstance(leaf, ArvadosFile): 
     print "Resolved to file '%s/%s' within collection %s" % (leaf.parent.stream_name(), leaf.name, leaf.parent.root_collection().manifest_locator()) 
 </pre> 

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