+class ToolExistsPrecondition(Condition):
+ def check(self, task):
+ import os
+
+ if task.cmd[0]=='/':
+ self.realpath = task.cmd
+ print "[Task.py][ToolExistsPrecondition] WARNING: usage of absolute paths for tasks should be avoided!"
+ return os.access(self.realpath, os.X_OK)
+ else:
+ self.realpath = task.cmd
+ path = os.environ.get('PATH', '').split(os.pathsep)
+ path.append(task.cwd + '/')
+ absolutes = filter(lambda file: os.access(file, os.X_OK), map(lambda directory, file = task.cmd: os.path.join(directory, file), path))
+ if len(absolutes) > 0:
+ self.realpath = task.cmd[0]
+ return True
+ return False
+
+ def getErrorMessage(self, task):
+ return _("A required tool (%s) was not found.") % (self.realpath)
+
+class AbortedPostcondition(Condition):
+ def getErrorMessage(self, task):
+ return "Cancelled upon user request"
+
+class ReturncodePostcondition(Condition):