waf/waflib/extras/stale.py

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#! /usr/bin/env python
# encoding: UTF-8
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# Thomas Nagy, 2006-2015 (ita)
"""
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Add a pre-build hook to remove build files (declared in the system)
that do not have a corresponding target
This can be used for example to remove the targets
that have changed name without performing
a full 'waf clean'
Of course, it will only work if there are no dynamically generated
nodes/tasks, in which case the method will have to be modified
to exclude some folders for example.
"""
from waflib import Logs, Build
from waflib.Runner import Parallel
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DYNAMIC_EXT = [] # add your non-cleanable files/extensions here
MOC_H_EXTS = '.cpp .cxx .hpp .hxx .h'.split()
def can_delete(node):
"""Imperfect moc cleanup which does not look for a Q_OBJECT macro in the files"""
if not node.name.endswith('.moc'):
return True
base = node.name[:-4]
p1 = node.parent.get_src()
p2 = node.parent.get_bld()
for k in MOC_H_EXTS:
h_name = base + k
n = p1.search_node(h_name)
if n:
return False
n = p2.search_node(h_name)
if n:
return False
# foo.cpp.moc, foo.h.moc, etc.
if base.endswith(k):
return False
return True
# recursion over the nodes to find the stale files
def stale_rec(node, nodes):
if node.abspath() in node.ctx.env[Build.CFG_FILES]:
return
if getattr(node, 'children', []):
for x in node.children.values():
if x.name != "c4che":
stale_rec(x, nodes)
else:
for ext in DYNAMIC_EXT:
if node.name.endswith(ext):
break
else:
if not node in nodes:
if can_delete(node):
Logs.warn("Removing stale file -> %s" % node.abspath())
node.delete()
old = Parallel.refill_task_list
def refill_task_list(self):
iit = old(self)
bld = self.bld
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# execute this operation only once
if getattr(self, 'stale_done', False):
return iit
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self.stale_done = True
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# this does not work in partial builds
if hasattr(bld, 'options') and bld.options.targets and bld.options.targets != '*':
return iit
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# this does not work in dynamic builds
if not hasattr(bld, 'post_mode') or bld.post_mode == Build.POST_LAZY:
return iit
# obtain the nodes to use during the build
nodes = []
for i in range(len(bld.groups)):
tasks = bld.get_tasks_group(i)
for x in tasks:
try:
nodes.extend(x.outputs)
except:
pass
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stale_rec(bld.bldnode, nodes)
return iit
Parallel.refill_task_list = refill_task_list