本文整理汇总了Python中waflib.Task.is_before方法的典型用法代码示例。如果您正苦于以下问题：Python Task.is_before方法的具体用法？Python Task.is_before怎么用？Python Task.is_before使用的例子？那么恭喜您, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类waflib.Task的用法示例。
在下文中一共展示了Task.is_before方法的1个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的Python代码示例。
示例1: set_precedence_constraints
# 需要导入模块: from waflib import Task [as 别名]
# 或者: from waflib.Task import is_before [as 别名]
def set_precedence_constraints(tasks):
cstr_groups = Utils.defaultdict(list)
for x in tasks:
x.run_after = SetOfTasks(x)
x.run_after_groups = []
x.waiting_sets = []
h = x.hash_constraints()
cstr_groups[h].append(x)
# create sets which can be reused for all tasks
for k in cstr_groups.keys():
cstr_groups[k] = set(cstr_groups[k])
# this list should be short
for key1, key2 in itertools.combinations(cstr_groups.keys(), 2):
group1 = cstr_groups[key1]
group2 = cstr_groups[key2]
# get the first entry of the set
t1 = next(iter(group1))
t2 = next(iter(group2))
# add the constraints based on the comparisons
if Task.is_before(t1, t2):
for x in group2:
x.run_after_groups.append(group1)
for k in group1:
k.waiting_sets.append(group1)
elif Task.is_before(t2, t1):
for x in group1:
x.run_after_groups.append(group2)
for k in group2:
k.waiting_sets.append(group2)