| 1 | #!/usr/bin/env python
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| 2 | # encoding: utf-8
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| 3 | # Thomas Nagy, 2008-2010 (ita)
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| 4 |
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| 5 | """
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| 6 | Execute the tasks with gcc -MD, read the dependencies from the .d file
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| 7 | and prepare the dependency calculation for the next run
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| 8 | """
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| 9 |
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| 10 | import os, re, threading
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| 11 | import Task, Logs, Utils, preproc
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| 12 | from TaskGen import before, after, feature
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| 13 |
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| 14 | lock = threading.Lock()
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| 15 |
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| 16 | preprocessor_flag = '-MD'
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| 17 |
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| 18 | @feature('cc')
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| 19 | @before('apply_core')
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| 20 | def add_mmd_cc(self):
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| 21 | if self.env.get_flat('CCFLAGS').find(preprocessor_flag) < 0:
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| 22 | self.env.append_value('CCFLAGS', preprocessor_flag)
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| 23 |
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| 24 | @feature('cxx')
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| 25 | @before('apply_core')
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| 26 | def add_mmd_cxx(self):
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| 27 | if self.env.get_flat('CXXFLAGS').find(preprocessor_flag) < 0:
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| 28 | self.env.append_value('CXXFLAGS', preprocessor_flag)
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| 29 |
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| 30 | def scan(self):
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| 31 | "the scanner does not do anything initially"
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| 32 | nodes = self.generator.bld.node_deps.get(self.unique_id(), [])
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| 33 | names = []
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| 34 | return (nodes, names)
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| 35 |
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| 36 | re_o = re.compile("\.o$")
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| 37 | re_src = re.compile("^(\.\.)[\\/](.*)$")
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| 38 |
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| 39 | def post_run(self):
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| 40 | # The following code is executed by threads, it is not safe, so a lock is needed...
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| 41 |
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| 42 | if getattr(self, 'cached', None):
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| 43 | return Task.Task.post_run(self)
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| 44 |
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| 45 | name = self.outputs[0].abspath(self.env)
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| 46 | name = re_o.sub('.d', name)
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| 47 | txt = Utils.readf(name)
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| 48 | #os.unlink(name)
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| 49 |
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| 50 | txt = txt.replace('\\\n', '')
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| 51 |
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| 52 | lst = txt.strip().split(':')
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| 53 | val = ":".join(lst[1:])
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| 54 | val = val.split()
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| 55 |
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| 56 | nodes = []
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| 57 | bld = self.generator.bld
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| 58 |
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| 59 | f = re.compile("^("+self.env.variant()+"|\.\.)[\\/](.*)$")
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| 60 | for x in val:
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| 61 | if os.path.isabs(x):
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| 62 |
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| 63 | if not preproc.go_absolute:
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| 64 | continue
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| 65 |
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| 66 | lock.acquire()
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| 67 | try:
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| 68 | node = bld.root.find_resource(x)
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| 69 | finally:
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| 70 | lock.release()
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| 71 | else:
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| 72 | g = re.search(re_src, x)
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| 73 | if g:
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| 74 | x = g.group(2)
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| 75 | lock.acquire()
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| 76 | try:
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| 77 | node = bld.bldnode.parent.find_resource(x)
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| 78 | finally:
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| 79 | lock.release()
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| 80 | else:
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| 81 | g = re.search(f, x)
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| 82 | if g:
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| 83 | x = g.group(2)
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| 84 | lock.acquire()
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| 85 | try:
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| 86 | node = bld.srcnode.find_resource(x)
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| 87 | finally:
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| 88 | lock.release()
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| 89 |
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| 90 | if id(node) == id(self.inputs[0]):
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| 91 | # ignore the source file, it is already in the dependencies
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| 92 | # this way, successful config tests may be retrieved from the cache
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| 93 | continue
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| 94 |
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| 95 | if not node:
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| 96 | raise ValueError('could not find %r for %r' % (x, self))
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| 97 | else:
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| 98 | nodes.append(node)
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| 99 |
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| 100 | Logs.debug('deps: real scanner for %s returned %s' % (str(self), str(nodes)))
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| 101 |
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| 102 | bld.node_deps[self.unique_id()] = nodes
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| 103 | bld.raw_deps[self.unique_id()] = []
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| 104 |
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| 105 | try:
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| 106 | del self.cache_sig
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| 107 | except:
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| 108 | pass
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| 109 |
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| 110 | Task.Task.post_run(self)
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| 111 |
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| 112 | import Constants, Utils
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| 113 | def sig_implicit_deps(self):
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| 114 | try:
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| 115 | return Task.Task.sig_implicit_deps(self)
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| 116 | except Utils.WafError:
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| 117 | return Constants.SIG_NIL
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| 118 |
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| 119 | for name in 'cc cxx'.split():
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| 120 | try:
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| 121 | cls = Task.TaskBase.classes[name]
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| 122 | except KeyError:
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| 123 | pass
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| 124 | else:
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| 125 | cls.post_run = post_run
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| 126 | cls.scan = scan
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| 127 | cls.sig_implicit_deps = sig_implicit_deps
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| 128 |
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