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1147 lines
42 KiB
1147 lines
42 KiB
"""SCons.Action
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This encapsulates information about executing any sort of action that
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can build one or more target Nodes (typically files) from one or more
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source Nodes (also typically files) given a specific Environment.
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The base class here is ActionBase. The base class supplies just a few
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OO utility methods and some generic methods for displaying information
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about an Action in response to the various commands that control printing.
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A second-level base class is _ActionAction. This extends ActionBase
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by providing the methods that can be used to show and perform an
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action. True Action objects will subclass _ActionAction; Action
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factory class objects will subclass ActionBase.
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The heavy lifting is handled by subclasses for the different types of
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actions we might execute:
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CommandAction
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CommandGeneratorAction
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FunctionAction
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ListAction
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The subclasses supply the following public interface methods used by
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other modules:
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__call__()
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THE public interface, "calling" an Action object executes the
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command or Python function. This also takes care of printing
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a pre-substitution command for debugging purposes.
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get_contents()
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Fetches the "contents" of an Action for signature calculation
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plus the varlist. This is what gets MD5 checksummed to decide
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if a target needs to be rebuilt because its action changed.
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genstring()
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Returns a string representation of the Action *without*
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command substitution, but allows a CommandGeneratorAction to
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generate the right action based on the specified target,
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source and env. This is used by the Signature subsystem
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(through the Executor) to obtain an (imprecise) representation
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of the Action operation for informative purposes.
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Subclasses also supply the following methods for internal use within
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this module:
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__str__()
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Returns a string approximation of the Action; no variable
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substitution is performed.
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execute()
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The internal method that really, truly, actually handles the
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execution of a command or Python function. This is used so
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that the __call__() methods can take care of displaying any
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pre-substitution representations, and *then* execute an action
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without worrying about the specific Actions involved.
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get_presig()
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Fetches the "contents" of a subclass for signature calculation.
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The varlist is added to this to produce the Action's contents.
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strfunction()
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Returns a substituted string representation of the Action.
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This is used by the _ActionAction.show() command to display the
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command/function that will be executed to generate the target(s).
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There is a related independent ActionCaller class that looks like a
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regular Action, and which serves as a wrapper for arbitrary functions
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that we want to let the user specify the arguments to now, but actually
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execute later (when an out-of-date check determines that it's needed to
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be executed, for example). Objects of this class are returned by an
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ActionFactory class that provides a __call__() method as a convenient
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way for wrapping up the functions.
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"""
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# Copyright (c) 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008 The SCons Foundation
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#
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# Permission is hereby granted, free of charge, to any person obtaining
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# a copy of this software and associated documentation files (the
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# "Software"), to deal in the Software without restriction, including
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# without limitation the rights to use, copy, modify, merge, publish,
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# distribute, sublicense, and/or sell copies of the Software, and to
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# permit persons to whom the Software is furnished to do so, subject to
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# the following conditions:
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#
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# The above copyright notice and this permission notice shall be included
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# in all copies or substantial portions of the Software.
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#
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# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY
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# KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE
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# WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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# NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
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# LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
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# OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
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# WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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__revision__ = "src/engine/SCons/Action.py 3842 2008/12/20 22:59:52 scons"
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import cPickle
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import dis
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import os
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import string
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import sys
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import subprocess
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from SCons.Debug import logInstanceCreation
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import SCons.Errors
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import SCons.Executor
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import SCons.Util
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import SCons.Subst
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# we use these a lot, so try to optimize them
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is_String = SCons.Util.is_String
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is_List = SCons.Util.is_List
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class _null:
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pass
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print_actions = 1
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execute_actions = 1
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print_actions_presub = 0
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def rfile(n):
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try:
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return n.rfile()
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except AttributeError:
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return n
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def default_exitstatfunc(s):
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return s
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try:
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SET_LINENO = dis.SET_LINENO
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HAVE_ARGUMENT = dis.HAVE_ARGUMENT
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except AttributeError:
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remove_set_lineno_codes = lambda x: x
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else:
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def remove_set_lineno_codes(code):
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result = []
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n = len(code)
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i = 0
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while i < n:
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c = code[i]
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op = ord(c)
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if op >= HAVE_ARGUMENT:
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if op != SET_LINENO:
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result.append(code[i:i+3])
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i = i+3
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else:
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result.append(c)
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i = i+1
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return string.join(result, '')
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def _callable_contents(obj):
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"""Return the signature contents of a callable Python object.
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"""
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try:
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# Test if obj is a method.
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return _function_contents(obj.im_func)
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except AttributeError:
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try:
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# Test if obj is a callable object.
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return _function_contents(obj.__call__.im_func)
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except AttributeError:
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try:
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# Test if obj is a code object.
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return _code_contents(obj)
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except AttributeError:
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# Test if obj is a function object.
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return _function_contents(obj)
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def _object_contents(obj):
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"""Return the signature contents of any Python object.
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We have to handle the case where object contains a code object
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since it can be pickled directly.
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"""
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try:
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# Test if obj is a method.
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return _function_contents(obj.im_func)
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except AttributeError:
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try:
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# Test if obj is a callable object.
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return _function_contents(obj.__call__.im_func)
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except AttributeError:
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try:
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# Test if obj is a code object.
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return _code_contents(obj)
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except AttributeError:
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try:
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# Test if obj is a function object.
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return _function_contents(obj)
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except AttributeError:
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# Should be a pickable Python object.
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try:
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return cPickle.dumps(obj)
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except (cPickle.PicklingError, TypeError):
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# This is weird, but it seems that nested classes
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# are unpickable. The Python docs say it should
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# always be a PicklingError, but some Python
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# versions seem to return TypeError. Just do
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# the best we can.
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return str(obj)
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def _code_contents(code):
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"""Return the signature contents of a code object.
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By providing direct access to the code object of the
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function, Python makes this extremely easy. Hooray!
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Unfortunately, older versions of Python include line
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number indications in the compiled byte code. Boo!
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So we remove the line number byte codes to prevent
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recompilations from moving a Python function.
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"""
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contents = []
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# The code contents depends on the number of local variables
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# but not their actual names.
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contents.append("%s,%s" % (code.co_argcount, len(code.co_varnames)))
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try:
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contents.append(",%s,%s" % (len(code.co_cellvars), len(code.co_freevars)))
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except AttributeError:
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# Older versions of Python do not support closures.
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contents.append(",0,0")
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# The code contents depends on any constants accessed by the
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# function. Note that we have to call _object_contents on each
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# constants because the code object of nested functions can
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# show-up among the constants.
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#
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# Note that we also always ignore the first entry of co_consts
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# which contains the function doc string. We assume that the
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# function does not access its doc string.
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contents.append(',(' + string.join(map(_object_contents,code.co_consts[1:]),',') + ')')
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# The code contents depends on the variable names used to
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# accessed global variable, as changing the variable name changes
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# the variable actually accessed and therefore changes the
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# function result.
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contents.append(',(' + string.join(map(_object_contents,code.co_names),',') + ')')
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# The code contents depends on its actual code!!!
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contents.append(',(' + str(remove_set_lineno_codes(code.co_code)) + ')')
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return string.join(contents, '')
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def _function_contents(func):
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"""Return the signature contents of a function."""
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contents = [_code_contents(func.func_code)]
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# The function contents depends on the value of defaults arguments
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if func.func_defaults:
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contents.append(',(' + string.join(map(_object_contents,func.func_defaults),',') + ')')
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else:
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contents.append(',()')
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# The function contents depends on the closure captured cell values.
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try:
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closure = func.func_closure or []
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except AttributeError:
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# Older versions of Python do not support closures.
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closure = []
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#xxx = [_object_contents(x.cell_contents) for x in closure]
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try:
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xxx = map(lambda x: _object_contents(x.cell_contents), closure)
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except AttributeError:
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xxx = []
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contents.append(',(' + string.join(xxx, ',') + ')')
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return string.join(contents, '')
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def _actionAppend(act1, act2):
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# This function knows how to slap two actions together.
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# Mainly, it handles ListActions by concatenating into
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# a single ListAction.
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a1 = Action(act1)
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a2 = Action(act2)
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if a1 is None or a2 is None:
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raise TypeError, "Cannot append %s to %s" % (type(act1), type(act2))
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if isinstance(a1, ListAction):
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if isinstance(a2, ListAction):
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return ListAction(a1.list + a2.list)
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else:
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return ListAction(a1.list + [ a2 ])
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else:
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if isinstance(a2, ListAction):
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return ListAction([ a1 ] + a2.list)
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else:
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return ListAction([ a1, a2 ])
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def _do_create_keywords(args, kw):
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"""This converts any arguments after the action argument into
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their equivalent keywords and adds them to the kw argument.
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"""
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v = kw.get('varlist', ())
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# prevent varlist="FOO" from being interpreted as ['F', 'O', 'O']
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if is_String(v): v = (v,)
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kw['varlist'] = tuple(v)
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if args:
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# turn positional args into equivalent keywords
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cmdstrfunc = args[0]
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if cmdstrfunc is None or is_String(cmdstrfunc):
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kw['cmdstr'] = cmdstrfunc
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elif callable(cmdstrfunc):
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kw['strfunction'] = cmdstrfunc
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else:
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raise SCons.Errors.UserError(
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'Invalid command display variable type. '
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'You must either pass a string or a callback which '
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'accepts (target, source, env) as parameters.')
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if len(args) > 1:
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kw['varlist'] = args[1:] + kw['varlist']
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if kw.get('strfunction', _null) is not _null \
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and kw.get('cmdstr', _null) is not _null:
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raise SCons.Errors.UserError(
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|
'Cannot have both strfunction and cmdstr args to Action()')
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|
|
def _do_create_action(act, kw):
|
|
"""This is the actual "implementation" for the
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Action factory method, below. This handles the
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fact that passing lists to Action() itself has
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different semantics than passing lists as elements
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of lists.
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The former will create a ListAction, the latter
|
|
will create a CommandAction by converting the inner
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list elements to strings."""
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|
|
if isinstance(act, ActionBase):
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return act
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|
if is_List(act):
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#TODO(1.5) return CommandAction(act, **kw)
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return apply(CommandAction, (act,), kw)
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|
|
if callable(act):
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try:
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|
gen = kw['generator']
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|
del kw['generator']
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|
except KeyError:
|
|
gen = 0
|
|
if gen:
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|
action_type = CommandGeneratorAction
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|
else:
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|
action_type = FunctionAction
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|
return action_type(act, kw)
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|
|
|
if is_String(act):
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|
var=SCons.Util.get_environment_var(act)
|
|
if var:
|
|
# This looks like a string that is purely an Environment
|
|
# variable reference, like "$FOO" or "${FOO}". We do
|
|
# something special here...we lazily evaluate the contents
|
|
# of that Environment variable, so a user could put something
|
|
# like a function or a CommandGenerator in that variable
|
|
# instead of a string.
|
|
return LazyAction(var, kw)
|
|
commands = string.split(str(act), '\n')
|
|
if len(commands) == 1:
|
|
#TODO(1.5) return CommandAction(commands[0], **kw)
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|
return apply(CommandAction, (commands[0],), kw)
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|
# The list of string commands may include a LazyAction, so we
|
|
# reprocess them via _do_create_list_action.
|
|
return _do_create_list_action(commands, kw)
|
|
return None
|
|
|
|
def _do_create_list_action(act, kw):
|
|
"""A factory for list actions. Convert the input list into Actions
|
|
and then wrap them in a ListAction."""
|
|
acts = []
|
|
for a in act:
|
|
aa = _do_create_action(a, kw)
|
|
if aa is not None: acts.append(aa)
|
|
if not acts:
|
|
return None
|
|
elif len(acts) == 1:
|
|
return acts[0]
|
|
else:
|
|
return ListAction(acts)
|
|
|
|
def Action(act, *args, **kw):
|
|
"""A factory for action objects."""
|
|
# Really simple: the _do_create_* routines do the heavy lifting.
|
|
_do_create_keywords(args, kw)
|
|
if is_List(act):
|
|
return _do_create_list_action(act, kw)
|
|
return _do_create_action(act, kw)
|
|
|
|
class ActionBase:
|
|
"""Base class for all types of action objects that can be held by
|
|
other objects (Builders, Executors, etc.) This provides the
|
|
common methods for manipulating and combining those actions."""
|
|
|
|
def __cmp__(self, other):
|
|
return cmp(self.__dict__, other)
|
|
|
|
def genstring(self, target, source, env):
|
|
return str(self)
|
|
|
|
def get_contents(self, target, source, env):
|
|
result = [ self.get_presig(target, source, env) ]
|
|
# This should never happen, as the Action() factory should wrap
|
|
# the varlist, but just in case an action is created directly,
|
|
# we duplicate this check here.
|
|
vl = self.varlist
|
|
if is_String(vl): vl = (vl,)
|
|
for v in vl:
|
|
result.append(env.subst('${'+v+'}'))
|
|
return string.join(result, '')
|
|
|
|
def __add__(self, other):
|
|
return _actionAppend(self, other)
|
|
|
|
def __radd__(self, other):
|
|
return _actionAppend(other, self)
|
|
|
|
def presub_lines(self, env):
|
|
# CommandGeneratorAction needs a real environment
|
|
# in order to return the proper string here, since
|
|
# it may call LazyAction, which looks up a key
|
|
# in that env. So we temporarily remember the env here,
|
|
# and CommandGeneratorAction will use this env
|
|
# when it calls its _generate method.
|
|
self.presub_env = env
|
|
lines = string.split(str(self), '\n')
|
|
self.presub_env = None # don't need this any more
|
|
return lines
|
|
|
|
def get_executor(self, env, overrides, tlist, slist, executor_kw):
|
|
"""Return the Executor for this Action."""
|
|
return SCons.Executor.Executor(self, env, overrides,
|
|
tlist, slist, executor_kw)
|
|
|
|
class _ActionAction(ActionBase):
|
|
"""Base class for actions that create output objects."""
|
|
def __init__(self, cmdstr=_null, strfunction=_null, varlist=(),
|
|
presub=_null, chdir=None, exitstatfunc=None,
|
|
**kw):
|
|
self.cmdstr = cmdstr
|
|
if strfunction is not _null:
|
|
if strfunction is None:
|
|
self.cmdstr = None
|
|
else:
|
|
self.strfunction = strfunction
|
|
self.varlist = varlist
|
|
self.presub = presub
|
|
self.chdir = chdir
|
|
if not exitstatfunc:
|
|
exitstatfunc = default_exitstatfunc
|
|
self.exitstatfunc = exitstatfunc
|
|
|
|
def print_cmd_line(self, s, target, source, env):
|
|
sys.stdout.write(s + "\n")
|
|
|
|
def __call__(self, target, source, env,
|
|
exitstatfunc=_null,
|
|
presub=_null,
|
|
show=_null,
|
|
execute=_null,
|
|
chdir=_null):
|
|
if not is_List(target):
|
|
target = [target]
|
|
if not is_List(source):
|
|
source = [source]
|
|
|
|
if presub is _null:
|
|
presub = self.presub
|
|
if presub is _null:
|
|
presub = print_actions_presub
|
|
if exitstatfunc is _null: exitstatfunc = self.exitstatfunc
|
|
if show is _null: show = print_actions
|
|
if execute is _null: execute = execute_actions
|
|
if chdir is _null: chdir = self.chdir
|
|
save_cwd = None
|
|
if chdir:
|
|
save_cwd = os.getcwd()
|
|
try:
|
|
chdir = str(chdir.abspath)
|
|
except AttributeError:
|
|
if not is_String(chdir):
|
|
chdir = str(target[0].dir)
|
|
if presub:
|
|
t = string.join(map(str, target), ' and ')
|
|
l = string.join(self.presub_lines(env), '\n ')
|
|
out = "Building %s with action:\n %s\n" % (t, l)
|
|
sys.stdout.write(out)
|
|
cmd = None
|
|
if show and self.strfunction:
|
|
cmd = self.strfunction(target, source, env)
|
|
if cmd:
|
|
if chdir:
|
|
cmd = ('os.chdir(%s)\n' % repr(chdir)) + cmd
|
|
try:
|
|
get = env.get
|
|
except AttributeError:
|
|
print_func = self.print_cmd_line
|
|
else:
|
|
print_func = get('PRINT_CMD_LINE_FUNC')
|
|
if not print_func:
|
|
print_func = self.print_cmd_line
|
|
print_func(cmd, target, source, env)
|
|
stat = 0
|
|
if execute:
|
|
if chdir:
|
|
os.chdir(chdir)
|
|
try:
|
|
stat = self.execute(target, source, env)
|
|
if isinstance(stat, SCons.Errors.BuildError):
|
|
s = exitstatfunc(stat.status)
|
|
if s:
|
|
stat.status = s
|
|
else:
|
|
stat = s
|
|
else:
|
|
stat = exitstatfunc(stat)
|
|
finally:
|
|
if save_cwd:
|
|
os.chdir(save_cwd)
|
|
if cmd and save_cwd:
|
|
print_func('os.chdir(%s)' % repr(save_cwd), target, source, env)
|
|
|
|
return stat
|
|
|
|
|
|
def _string_from_cmd_list(cmd_list):
|
|
"""Takes a list of command line arguments and returns a pretty
|
|
representation for printing."""
|
|
cl = []
|
|
for arg in map(str, cmd_list):
|
|
if ' ' in arg or '\t' in arg:
|
|
arg = '"' + arg + '"'
|
|
cl.append(arg)
|
|
return string.join(cl)
|
|
|
|
# A fiddlin' little function that has an 'import SCons.Environment' which
|
|
# can't be moved to the top level without creating an import loop. Since
|
|
# this import creates a local variable named 'SCons', it blocks access to
|
|
# the global variable, so we move it here to prevent complaints about local
|
|
# variables being used uninitialized.
|
|
default_ENV = None
|
|
def get_default_ENV(env):
|
|
global default_ENV
|
|
try:
|
|
return env['ENV']
|
|
except KeyError:
|
|
if not default_ENV:
|
|
import SCons.Environment
|
|
# This is a hideously expensive way to get a default shell
|
|
# environment. What it really should do is run the platform
|
|
# setup to get the default ENV. Fortunately, it's incredibly
|
|
# rare for an Environment not to have a shell environment, so
|
|
# we're not going to worry about it overmuch.
|
|
default_ENV = SCons.Environment.Environment()['ENV']
|
|
return default_ENV
|
|
|
|
# This function is still in draft mode. We're going to need something like
|
|
# it in the long run as more and more places use subprocess, but I'm sure
|
|
# it'll have to be tweaked to get the full desired functionality.
|
|
# one special arg (so far?), 'error', to tell what to do with exceptions.
|
|
def _subproc(env, cmd, error = 'ignore', **kw):
|
|
"""Do common setup for a subprocess.Popen() call"""
|
|
# allow std{in,out,err} to be "'devnull'"
|
|
io = kw.get('stdin')
|
|
if is_String(io) and io == 'devnull':
|
|
kw['stdin'] = open(os.devnull)
|
|
io = kw.get('stdout')
|
|
if is_String(io) and io == 'devnull':
|
|
kw['stdout'] = open(os.devnull, 'w')
|
|
io = kw.get('stderr')
|
|
if is_String(io) and io == 'devnull':
|
|
kw['stderr'] = open(os.devnull, 'w')
|
|
|
|
# Figure out what shell environment to use
|
|
ENV = kw.get('env', None)
|
|
if ENV is None: ENV = get_default_ENV(env)
|
|
|
|
# Ensure that the ENV values are all strings:
|
|
new_env = {}
|
|
for key, value in ENV.items():
|
|
if is_List(value):
|
|
# If the value is a list, then we assume it is a path list,
|
|
# because that's a pretty common list-like value to stick
|
|
# in an environment variable:
|
|
value = SCons.Util.flatten_sequence(value)
|
|
new_env[key] = string.join(map(str, value), os.pathsep)
|
|
else:
|
|
# It's either a string or something else. If it's a string,
|
|
# we still want to call str() because it might be a *Unicode*
|
|
# string, which makes subprocess.Popen() gag. If it isn't a
|
|
# string or a list, then we just coerce it to a string, which
|
|
# is the proper way to handle Dir and File instances and will
|
|
# produce something reasonable for just about everything else:
|
|
new_env[key] = str(value)
|
|
kw['env'] = new_env
|
|
|
|
try:
|
|
#FUTURE return subprocess.Popen(cmd, **kw)
|
|
return apply(subprocess.Popen, (cmd,), kw)
|
|
except EnvironmentError, e:
|
|
if error == 'raise': raise
|
|
# return a dummy Popen instance that only returns error
|
|
class dummyPopen:
|
|
def __init__(self, e): self.exception = e
|
|
def communicate(self): return ('','')
|
|
def wait(self): return -self.exception.errno
|
|
stdin = None
|
|
class f:
|
|
def read(self): return ''
|
|
def readline(self): return ''
|
|
stdout = stderr = f()
|
|
return dummyPopen(e)
|
|
|
|
class CommandAction(_ActionAction):
|
|
"""Class for command-execution actions."""
|
|
def __init__(self, cmd, **kw):
|
|
# Cmd can actually be a list or a single item; if it's a
|
|
# single item it should be the command string to execute; if a
|
|
# list then it should be the words of the command string to
|
|
# execute. Only a single command should be executed by this
|
|
# object; lists of commands should be handled by embedding
|
|
# these objects in a ListAction object (which the Action()
|
|
# factory above does). cmd will be passed to
|
|
# Environment.subst_list() for substituting environment
|
|
# variables.
|
|
if __debug__: logInstanceCreation(self, 'Action.CommandAction')
|
|
|
|
#TODO(1.5) _ActionAction.__init__(self, **kw)
|
|
apply(_ActionAction.__init__, (self,), kw)
|
|
if is_List(cmd):
|
|
if filter(is_List, cmd):
|
|
raise TypeError, "CommandAction should be given only " \
|
|
"a single command"
|
|
self.cmd_list = cmd
|
|
|
|
def __str__(self):
|
|
if is_List(self.cmd_list):
|
|
return string.join(map(str, self.cmd_list), ' ')
|
|
return str(self.cmd_list)
|
|
|
|
def process(self, target, source, env):
|
|
result = env.subst_list(self.cmd_list, 0, target, source)
|
|
silent = None
|
|
ignore = None
|
|
while 1:
|
|
try: c = result[0][0][0]
|
|
except IndexError: c = None
|
|
if c == '@': silent = 1
|
|
elif c == '-': ignore = 1
|
|
else: break
|
|
result[0][0] = result[0][0][1:]
|
|
try:
|
|
if not result[0][0]:
|
|
result[0] = result[0][1:]
|
|
except IndexError:
|
|
pass
|
|
return result, ignore, silent
|
|
|
|
def strfunction(self, target, source, env):
|
|
if self.cmdstr is None:
|
|
return None
|
|
if self.cmdstr is not _null:
|
|
from SCons.Subst import SUBST_RAW
|
|
c = env.subst(self.cmdstr, SUBST_RAW, target, source)
|
|
if c:
|
|
return c
|
|
cmd_list, ignore, silent = self.process(target, source, env)
|
|
if silent:
|
|
return ''
|
|
return _string_from_cmd_list(cmd_list[0])
|
|
|
|
def execute(self, target, source, env):
|
|
"""Execute a command action.
|
|
|
|
This will handle lists of commands as well as individual commands,
|
|
because construction variable substitution may turn a single
|
|
"command" into a list. This means that this class can actually
|
|
handle lists of commands, even though that's not how we use it
|
|
externally.
|
|
"""
|
|
escape_list = SCons.Subst.escape_list
|
|
flatten_sequence = SCons.Util.flatten_sequence
|
|
|
|
try:
|
|
shell = env['SHELL']
|
|
except KeyError:
|
|
raise SCons.Errors.UserError('Missing SHELL construction variable.')
|
|
|
|
try:
|
|
spawn = env['SPAWN']
|
|
except KeyError:
|
|
raise SCons.Errors.UserError('Missing SPAWN construction variable.')
|
|
else:
|
|
if is_String(spawn):
|
|
spawn = env.subst(spawn, raw=1, conv=lambda x: x)
|
|
|
|
escape = env.get('ESCAPE', lambda x: x)
|
|
|
|
ENV = get_default_ENV(env)
|
|
|
|
# Ensure that the ENV values are all strings:
|
|
for key, value in ENV.items():
|
|
if not is_String(value):
|
|
if is_List(value):
|
|
# If the value is a list, then we assume it is a
|
|
# path list, because that's a pretty common list-like
|
|
# value to stick in an environment variable:
|
|
value = flatten_sequence(value)
|
|
ENV[key] = string.join(map(str, value), os.pathsep)
|
|
else:
|
|
# If it isn't a string or a list, then we just coerce
|
|
# it to a string, which is the proper way to handle
|
|
# Dir and File instances and will produce something
|
|
# reasonable for just about everything else:
|
|
ENV[key] = str(value)
|
|
|
|
cmd_list, ignore, silent = self.process(target, map(rfile, source), env)
|
|
|
|
# Use len() to filter out any "command" that's zero-length.
|
|
for cmd_line in filter(len, cmd_list):
|
|
# Escape the command line for the interpreter we are using.
|
|
cmd_line = escape_list(cmd_line, escape)
|
|
result = spawn(shell, escape, cmd_line[0], cmd_line, ENV)
|
|
if not ignore and result:
|
|
msg = "Error %s" % result
|
|
return SCons.Errors.BuildError(errstr=msg,
|
|
status=result,
|
|
action=self,
|
|
command=cmd_line)
|
|
return 0
|
|
|
|
def get_presig(self, target, source, env):
|
|
"""Return the signature contents of this action's command line.
|
|
|
|
This strips $(-$) and everything in between the string,
|
|
since those parts don't affect signatures.
|
|
"""
|
|
from SCons.Subst import SUBST_SIG
|
|
cmd = self.cmd_list
|
|
if is_List(cmd):
|
|
cmd = string.join(map(str, cmd))
|
|
else:
|
|
cmd = str(cmd)
|
|
return env.subst_target_source(cmd, SUBST_SIG, target, source)
|
|
|
|
def get_implicit_deps(self, target, source, env):
|
|
icd = env.get('IMPLICIT_COMMAND_DEPENDENCIES', True)
|
|
if is_String(icd) and icd[:1] == '$':
|
|
icd = env.subst(icd)
|
|
if not icd or icd in ('0', 'None'):
|
|
return []
|
|
from SCons.Subst import SUBST_SIG
|
|
cmd_list = env.subst_list(self.cmd_list, SUBST_SIG, target, source)
|
|
res = []
|
|
for cmd_line in cmd_list:
|
|
if cmd_line:
|
|
d = env.WhereIs(str(cmd_line[0]))
|
|
if d:
|
|
res.append(env.fs.File(d))
|
|
return res
|
|
|
|
class CommandGeneratorAction(ActionBase):
|
|
"""Class for command-generator actions."""
|
|
def __init__(self, generator, kw):
|
|
if __debug__: logInstanceCreation(self, 'Action.CommandGeneratorAction')
|
|
self.generator = generator
|
|
self.gen_kw = kw
|
|
self.varlist = kw.get('varlist', ())
|
|
|
|
def _generate(self, target, source, env, for_signature):
|
|
# ensure that target is a list, to make it easier to write
|
|
# generator functions:
|
|
if not is_List(target):
|
|
target = [target]
|
|
|
|
ret = self.generator(target=target, source=source, env=env, for_signature=for_signature)
|
|
#TODO(1.5) gen_cmd = Action(ret, **self.gen_kw)
|
|
gen_cmd = apply(Action, (ret,), self.gen_kw)
|
|
if not gen_cmd:
|
|
raise SCons.Errors.UserError("Object returned from command generator: %s cannot be used to create an Action." % repr(ret))
|
|
return gen_cmd
|
|
|
|
def __str__(self):
|
|
try:
|
|
env = self.presub_env
|
|
except AttributeError:
|
|
env = None
|
|
if env is None:
|
|
env = SCons.Defaults.DefaultEnvironment()
|
|
act = self._generate([], [], env, 1)
|
|
return str(act)
|
|
|
|
def genstring(self, target, source, env):
|
|
return self._generate(target, source, env, 1).genstring(target, source, env)
|
|
|
|
def __call__(self, target, source, env, exitstatfunc=_null, presub=_null,
|
|
show=_null, execute=_null, chdir=_null):
|
|
act = self._generate(target, source, env, 0)
|
|
return act(target, source, env, exitstatfunc, presub,
|
|
show, execute, chdir)
|
|
|
|
def get_presig(self, target, source, env):
|
|
"""Return the signature contents of this action's command line.
|
|
|
|
This strips $(-$) and everything in between the string,
|
|
since those parts don't affect signatures.
|
|
"""
|
|
return self._generate(target, source, env, 1).get_presig(target, source, env)
|
|
|
|
def get_implicit_deps(self, target, source, env):
|
|
return self._generate(target, source, env, 1).get_implicit_deps(target, source, env)
|
|
|
|
|
|
|
|
# A LazyAction is a kind of hybrid generator and command action for
|
|
# strings of the form "$VAR". These strings normally expand to other
|
|
# strings (think "$CCCOM" to "$CC -c -o $TARGET $SOURCE"), but we also
|
|
# want to be able to replace them with functions in the construction
|
|
# environment. Consequently, we want lazy evaluation and creation of
|
|
# an Action in the case of the function, but that's overkill in the more
|
|
# normal case of expansion to other strings.
|
|
#
|
|
# So we do this with a subclass that's both a generator *and*
|
|
# a command action. The overridden methods all do a quick check
|
|
# of the construction variable, and if it's a string we just call
|
|
# the corresponding CommandAction method to do the heavy lifting.
|
|
# If not, then we call the same-named CommandGeneratorAction method.
|
|
# The CommandGeneratorAction methods work by using the overridden
|
|
# _generate() method, that is, our own way of handling "generation" of
|
|
# an action based on what's in the construction variable.
|
|
|
|
class LazyAction(CommandGeneratorAction, CommandAction):
|
|
|
|
def __init__(self, var, kw):
|
|
if __debug__: logInstanceCreation(self, 'Action.LazyAction')
|
|
#FUTURE CommandAction.__init__(self, '${'+var+'}', **kw)
|
|
apply(CommandAction.__init__, (self, '${'+var+'}'), kw)
|
|
self.var = SCons.Util.to_String(var)
|
|
self.gen_kw = kw
|
|
|
|
def get_parent_class(self, env):
|
|
c = env.get(self.var)
|
|
if is_String(c) and not '\n' in c:
|
|
return CommandAction
|
|
return CommandGeneratorAction
|
|
|
|
def _generate_cache(self, env):
|
|
c = env.get(self.var, '')
|
|
#TODO(1.5) gen_cmd = Action(c, **self.gen_kw)
|
|
gen_cmd = apply(Action, (c,), self.gen_kw)
|
|
if not gen_cmd:
|
|
raise SCons.Errors.UserError("$%s value %s cannot be used to create an Action." % (self.var, repr(c)))
|
|
return gen_cmd
|
|
|
|
def _generate(self, target, source, env, for_signature):
|
|
return self._generate_cache(env)
|
|
|
|
def __call__(self, target, source, env, *args, **kw):
|
|
args = (self, target, source, env) + args
|
|
c = self.get_parent_class(env)
|
|
#TODO(1.5) return c.__call__(*args, **kw)
|
|
return apply(c.__call__, args, kw)
|
|
|
|
def get_presig(self, target, source, env):
|
|
c = self.get_parent_class(env)
|
|
return c.get_presig(self, target, source, env)
|
|
|
|
|
|
|
|
class FunctionAction(_ActionAction):
|
|
"""Class for Python function actions."""
|
|
|
|
def __init__(self, execfunction, kw):
|
|
if __debug__: logInstanceCreation(self, 'Action.FunctionAction')
|
|
|
|
self.execfunction = execfunction
|
|
try:
|
|
self.funccontents = _callable_contents(execfunction)
|
|
except AttributeError:
|
|
try:
|
|
# See if execfunction will do the heavy lifting for us.
|
|
self.gc = execfunction.get_contents
|
|
except AttributeError:
|
|
# This is weird, just do the best we can.
|
|
self.funccontents = _object_contents(execfunction)
|
|
|
|
#TODO(1.5) _ActionAction.__init__(self, **kw)
|
|
apply(_ActionAction.__init__, (self,), kw)
|
|
|
|
def function_name(self):
|
|
try:
|
|
return self.execfunction.__name__
|
|
except AttributeError:
|
|
try:
|
|
return self.execfunction.__class__.__name__
|
|
except AttributeError:
|
|
return "unknown_python_function"
|
|
|
|
def strfunction(self, target, source, env):
|
|
if self.cmdstr is None:
|
|
return None
|
|
if self.cmdstr is not _null:
|
|
from SCons.Subst import SUBST_RAW
|
|
c = env.subst(self.cmdstr, SUBST_RAW, target, source)
|
|
if c:
|
|
return c
|
|
def array(a):
|
|
def quote(s):
|
|
try:
|
|
str_for_display = s.str_for_display
|
|
except AttributeError:
|
|
s = repr(s)
|
|
else:
|
|
s = str_for_display()
|
|
return s
|
|
return '[' + string.join(map(quote, a), ", ") + ']'
|
|
try:
|
|
strfunc = self.execfunction.strfunction
|
|
except AttributeError:
|
|
pass
|
|
else:
|
|
if strfunc is None:
|
|
return None
|
|
if callable(strfunc):
|
|
return strfunc(target, source, env)
|
|
name = self.function_name()
|
|
tstr = array(target)
|
|
sstr = array(source)
|
|
return "%s(%s, %s)" % (name, tstr, sstr)
|
|
|
|
def __str__(self):
|
|
name = self.function_name()
|
|
if name == 'ActionCaller':
|
|
return str(self.execfunction)
|
|
return "%s(target, source, env)" % name
|
|
|
|
def execute(self, target, source, env):
|
|
exc_info = (None,None,None)
|
|
try:
|
|
rsources = map(rfile, source)
|
|
try:
|
|
result = self.execfunction(target=target, source=rsources, env=env)
|
|
except KeyboardInterrupt, e:
|
|
raise
|
|
except SystemExit, e:
|
|
raise
|
|
except Exception, e:
|
|
result = e
|
|
exc_info = sys.exc_info()
|
|
|
|
if result:
|
|
result = SCons.Errors.convert_to_BuildError(result, exc_info)
|
|
result.node=target
|
|
result.action=self
|
|
result.command=self.strfunction(target, source, env)
|
|
|
|
# FIXME: This maintains backward compatibility with respect to
|
|
# which type of exceptions were returned by raising an
|
|
# exception and which ones were returned by value. It would
|
|
# probably be best to always return them by value here, but
|
|
# some codes do not check the return value of Actions and I do
|
|
# not have the time to modify them at this point.
|
|
if (exc_info[1] and
|
|
not isinstance(exc_info[1],EnvironmentError)):
|
|
raise result
|
|
|
|
return result
|
|
finally:
|
|
# Break the cycle between the traceback object and this
|
|
# function stack frame. See the sys.exc_info() doc info for
|
|
# more information about this issue.
|
|
del exc_info
|
|
|
|
|
|
def get_presig(self, target, source, env):
|
|
"""Return the signature contents of this callable action."""
|
|
try:
|
|
return self.gc(target, source, env)
|
|
except AttributeError:
|
|
return self.funccontents
|
|
|
|
def get_implicit_deps(self, target, source, env):
|
|
return []
|
|
|
|
class ListAction(ActionBase):
|
|
"""Class for lists of other actions."""
|
|
def __init__(self, list):
|
|
if __debug__: logInstanceCreation(self, 'Action.ListAction')
|
|
def list_of_actions(x):
|
|
if isinstance(x, ActionBase):
|
|
return x
|
|
return Action(x)
|
|
self.list = map(list_of_actions, list)
|
|
# our children will have had any varlist
|
|
# applied; we don't need to do it again
|
|
self.varlist = ()
|
|
|
|
def genstring(self, target, source, env):
|
|
return string.join(map(lambda a, t=target, s=source, e=env:
|
|
a.genstring(t, s, e),
|
|
self.list),
|
|
'\n')
|
|
|
|
def __str__(self):
|
|
return string.join(map(str, self.list), '\n')
|
|
|
|
def presub_lines(self, env):
|
|
return SCons.Util.flatten_sequence(
|
|
map(lambda a, env=env: a.presub_lines(env), self.list))
|
|
|
|
def get_presig(self, target, source, env):
|
|
"""Return the signature contents of this action list.
|
|
|
|
Simple concatenation of the signatures of the elements.
|
|
"""
|
|
return string.join(map(lambda x, t=target, s=source, e=env:
|
|
x.get_contents(t, s, e),
|
|
self.list),
|
|
"")
|
|
|
|
def __call__(self, target, source, env, exitstatfunc=_null, presub=_null,
|
|
show=_null, execute=_null, chdir=_null):
|
|
for act in self.list:
|
|
stat = act(target, source, env, exitstatfunc, presub,
|
|
show, execute, chdir)
|
|
if stat:
|
|
return stat
|
|
return 0
|
|
|
|
def get_implicit_deps(self, target, source, env):
|
|
result = []
|
|
for act in self.list:
|
|
result.extend(act.get_implicit_deps(target, source, env))
|
|
return result
|
|
|
|
class ActionCaller:
|
|
"""A class for delaying calling an Action function with specific
|
|
(positional and keyword) arguments until the Action is actually
|
|
executed.
|
|
|
|
This class looks to the rest of the world like a normal Action object,
|
|
but what it's really doing is hanging on to the arguments until we
|
|
have a target, source and env to use for the expansion.
|
|
"""
|
|
def __init__(self, parent, args, kw):
|
|
self.parent = parent
|
|
self.args = args
|
|
self.kw = kw
|
|
|
|
def get_contents(self, target, source, env):
|
|
actfunc = self.parent.actfunc
|
|
try:
|
|
# "self.actfunc" is a function.
|
|
contents = str(actfunc.func_code.co_code)
|
|
except AttributeError:
|
|
# "self.actfunc" is a callable object.
|
|
try:
|
|
contents = str(actfunc.__call__.im_func.func_code.co_code)
|
|
except AttributeError:
|
|
# No __call__() method, so it might be a builtin
|
|
# or something like that. Do the best we can.
|
|
contents = str(actfunc)
|
|
contents = remove_set_lineno_codes(contents)
|
|
return contents
|
|
|
|
def subst(self, s, target, source, env):
|
|
# If s is a list, recursively apply subst()
|
|
# to every element in the list
|
|
if is_List(s):
|
|
result = []
|
|
for elem in s:
|
|
result.append(self.subst(elem, target, source, env))
|
|
return self.parent.convert(result)
|
|
|
|
# Special-case hack: Let a custom function wrapped in an
|
|
# ActionCaller get at the environment through which the action
|
|
# was called by using this hard-coded value as a special return.
|
|
if s == '$__env__':
|
|
return env
|
|
elif is_String(s):
|
|
return env.subst(s, 1, target, source)
|
|
return self.parent.convert(s)
|
|
|
|
def subst_args(self, target, source, env):
|
|
return map(lambda x, self=self, t=target, s=source, e=env:
|
|
self.subst(x, t, s, e),
|
|
self.args)
|
|
|
|
def subst_kw(self, target, source, env):
|
|
kw = {}
|
|
for key in self.kw.keys():
|
|
kw[key] = self.subst(self.kw[key], target, source, env)
|
|
return kw
|
|
|
|
def __call__(self, target, source, env):
|
|
args = self.subst_args(target, source, env)
|
|
kw = self.subst_kw(target, source, env)
|
|
#TODO(1.5) return self.parent.actfunc(*args, **kw)
|
|
return apply(self.parent.actfunc, args, kw)
|
|
|
|
def strfunction(self, target, source, env):
|
|
args = self.subst_args(target, source, env)
|
|
kw = self.subst_kw(target, source, env)
|
|
#TODO(1.5) return self.parent.strfunc(*args, **kw)
|
|
return apply(self.parent.strfunc, args, kw)
|
|
|
|
def __str__(self):
|
|
#TODO(1.5) return self.parent.strfunc(*self.args, **self.kw)
|
|
return apply(self.parent.strfunc, self.args, self.kw)
|
|
|
|
class ActionFactory:
|
|
"""A factory class that will wrap up an arbitrary function
|
|
as an SCons-executable Action object.
|
|
|
|
The real heavy lifting here is done by the ActionCaller class.
|
|
We just collect the (positional and keyword) arguments that we're
|
|
called with and give them to the ActionCaller object we create,
|
|
so it can hang onto them until it needs them.
|
|
"""
|
|
def __init__(self, actfunc, strfunc, convert=lambda x: x):
|
|
self.actfunc = actfunc
|
|
self.strfunc = strfunc
|
|
self.convert = convert
|
|
|
|
def __call__(self, *args, **kw):
|
|
ac = ActionCaller(self, args, kw)
|
|
action = Action(ac, strfunction=ac.strfunction)
|
|
return action
|
|
|