Commit 62e2f7fd authored by ita1024's avatar ita1024

Exclude ConfigSet from altering ConfigurationContext.run_build caches #2273

parent f5a39845
......@@ -508,23 +508,27 @@ def find_binary(self, filenames, exts, paths):
@conf
def run_build(self, *k, **kw):
"""
Create a temporary build context to execute a build. A reference to that build
context is kept on self.test_bld for debugging purposes, and you should not rely
on it too much (read the note on the cache below).
The parameters given in the arguments to this function are passed as arguments for
a single task generator created in the build. Only three parameters are obligatory:
Create a temporary build context to execute a build. A temporary reference to that build
context is kept on self.test_bld for debugging purposes.
The arguments to this function are passed to a single task generator for that build.
Only three parameters are mandatory:
:param features: features to pass to a task generator created in the build
:type features: list of string
:param compile_filename: file to create for the compilation (default: *test.c*)
:type compile_filename: string
:param code: code to write in the filename to compile
:param code: input file contents
:type code: string
Though this function returns *0* by default, the build may set an attribute named *retval* on the
Though this function returns *0* by default, the build may bind attribute named *retval* on the
build context object to return a particular value. See :py:func:`waflib.Tools.c_config.test_exec_fun` for example.
This function also features a cache which can be enabled by the following option::
The temporary builds creates a temporary folder; the name of that folder is calculated
by hashing input arguments to this function, with the exception of :py:class:`waflib.ConfigSet.ConfigSet`
objects which are used for both reading and writing values.
This function also features a cache which is disabled by default; that cache relies
on the hash value calculated as indicated above::
def options(opt):
opt.add_option('--confcache', dest='confcache', default=0,
......@@ -538,7 +542,10 @@ def run_build(self, *k, **kw):
buf = []
for key in sorted(kw.keys()):
v = kw[key]
if hasattr(v, '__call__'):
if isinstance(v, ConfigSet.ConfigSet):
# values are being written to, so they are excluded from contributing to the hash
continue
elif hasattr(v, '__call__'):
buf.append(Utils.h_fun(v))
else:
buf.append(str(v))
......
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