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143 lines
3.1 KiB
Python
143 lines
3.1 KiB
Python
#!/usr/bin/env python
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# encoding: utf-8
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# Thomas Nagy, 2011 (ita)
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"""
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A make-like way of executing the build, following the relationships between inputs/outputs
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This algorithm will lead to slower builds, will not be as flexible as "waf build", but
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it might be useful for building data files (?)
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It is likely to break in the following cases:
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- files are created dynamically (no inputs or outputs)
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- headers
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- building two files from different groups
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"""
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import re
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from waflib import Options, Task
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from waflib.Build import BuildContext
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class MakeContext(BuildContext):
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'''executes tasks in a step-by-step manner, following dependencies between inputs/outputs'''
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cmd = 'make'
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fun = 'build'
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def __init__(self, **kw):
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super(MakeContext, self).__init__(**kw)
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self.files = Options.options.files
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def get_build_iterator(self):
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if not self.files:
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while 1:
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yield super(MakeContext, self).get_build_iterator()
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for g in self.groups:
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for tg in g:
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try:
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f = tg.post
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except AttributeError:
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pass
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else:
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f()
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provides = {}
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uses = {}
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all_tasks = []
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tasks = []
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for pat in self.files.split(','):
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matcher = self.get_matcher(pat)
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for tg in g:
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if isinstance(tg, Task.Task):
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lst = [tg]
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else:
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lst = tg.tasks
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for tsk in lst:
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all_tasks.append(tsk)
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do_exec = False
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for node in tsk.inputs:
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try:
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uses[node].append(tsk)
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except:
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uses[node] = [tsk]
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if matcher(node, output=False):
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do_exec = True
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break
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for node in tsk.outputs:
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try:
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provides[node].append(tsk)
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except:
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provides[node] = [tsk]
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if matcher(node, output=True):
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do_exec = True
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break
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if do_exec:
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tasks.append(tsk)
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# so we have the tasks that we need to process, the list of all tasks,
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# the map of the tasks providing nodes, and the map of tasks using nodes
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if not tasks:
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# if there are no tasks matching, return everything in the current group
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result = all_tasks
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else:
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# this is like a big filter...
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result = set()
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seen = set()
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cur = set(tasks)
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while cur:
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result |= cur
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tosee = set()
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for tsk in cur:
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for node in tsk.inputs:
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if node in seen:
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continue
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seen.add(node)
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tosee |= set(provides.get(node, []))
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cur = tosee
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result = list(result)
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Task.set_file_constraints(result)
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Task.set_precedence_constraints(result)
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yield result
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while 1:
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yield []
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def get_matcher(self, pat):
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# this returns a function
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inn = True
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out = True
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if pat.startswith('in:'):
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out = False
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pat = pat.replace('in:', '')
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elif pat.startswith('out:'):
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inn = False
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pat = pat.replace('out:', '')
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anode = self.root.find_node(pat)
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pattern = None
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if not anode:
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if not pat.startswith('^'):
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pat = '^.+?%s' % pat
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if not pat.endswith('$'):
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pat = '%s$' % pat
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pattern = re.compile(pat)
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def match(node, output):
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if output and not out:
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return False
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if not output and not inn:
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return False
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if anode:
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return anode == node
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else:
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return pattern.match(node.abspath())
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return match
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