diff options
Diffstat (limited to 'third_party/waf/waflib/Task.py')
| -rw-r--r-- | third_party/waf/waflib/Task.py | 40 |
1 files changed, 36 insertions, 4 deletions
diff --git a/third_party/waf/waflib/Task.py b/third_party/waf/waflib/Task.py index 89a73258f92..c4642443f55 100644 --- a/third_party/waf/waflib/Task.py +++ b/third_party/waf/waflib/Task.py @@ -1,7 +1,3 @@ -#! /usr/bin/env python -# encoding: utf-8 -# WARNING! Do not edit! https://waf.io/book/index.html#_obtaining_the_waf_file - #!/usr/bin/env python # encoding: utf-8 # Thomas Nagy, 2005-2018 (ita) @@ -726,6 +722,32 @@ class Task(evil): v = v() # dependency is a function, call it upd(v) + def sig_deep_inputs(self): + """ + Enable rebuilds on input files task signatures. Not used by default. + + Example: hashes of output programs can be unchanged after being re-linked, + despite the libraries being different. This method can thus prevent stale unit test + results (waf_unit_test.py). + + Hashing input file timestamps is another possibility for the implementation. + This may cause unnecessary rebuilds when input tasks are frequently executed. + Here is an implementation example:: + + lst = [] + for node in self.inputs + self.dep_nodes: + st = os.stat(node.abspath()) + lst.append(st.st_mtime) + lst.append(st.st_size) + self.m.update(Utils.h_list(lst)) + + The downside of the implementation is that it absolutely requires all build directory + files to be declared within the current build. + """ + bld = self.generator.bld + lst = [bld.task_sigs[bld.node_sigs[node]] for node in (self.inputs + self.dep_nodes) if node.is_bld()] + self.m.update(Utils.h_list(lst)) + def sig_vars(self): """ Used by :py:meth:`waflib.Task.Task.signature`; it hashes :py:attr:`waflib.Task.Task.env` variables/values @@ -1244,6 +1266,16 @@ def task_factory(name, func=None, vars=None, color='GREEN', ext_in=[], ext_out=[ return cls +def deep_inputs(cls): + """ + Task class decorator to enable rebuilds on input files task signatures + """ + def sig_explicit_deps(self): + Task.sig_explicit_deps(self) + Task.sig_deep_inputs(self) + cls.sig_explicit_deps = sig_explicit_deps + return cls + TaskBase = Task "Provided for compatibility reasons, TaskBase should not be used" |