a pre-substitution command for debugging purposes.
get_contents()
- Fetches the "contents" of an Action for signature calculation.
- This is what the Sig/*.py subsystem uses to decide if a target
- needs to be rebuilt because its action changed.
+ Fetches the "contents" of an Action for signature calculation
+ plus the varlist. This is what gets MD5 checksummed to decide
+ if a target needs to be rebuilt because its action changed.
genstring()
Returns a string representation of the Action *without*
__str__()
Returns a string approximation of the Action; no variable
substitution is performed.
-
+
execute()
The internal method that really, truly, actually handles the
execution of a command or Python function. This is used so
pre-substitution representations, and *then* execute an action
without worrying about the specific Actions involved.
+ get_presig()
+ Fetches the "contents" of a subclass for signature calculation.
+ The varlist is added to this to produce the Action's contents.
+
strfunction()
Returns a substituted string representation of the Action.
This is used by the _ActionAction.show() command to display the
"""
-#
# __COPYRIGHT__
#
# Permission is hereby granted, free of charge, to any person obtaining
# LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
# OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
# WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
-#
+from __future__ import generators ### KEEP FOR COMPATIBILITY FIXERS
__revision__ = "__FILE__ __REVISION__ __DATE__ __DEVELOPER__"
+import cPickle
+import dis
import os
-import os.path
import re
-import string
import sys
+import subprocess
from SCons.Debug import logInstanceCreation
import SCons.Errors
+import SCons.Executor
import SCons.Util
+import SCons.Subst
-class _Null:
- pass
+# we use these a lot, so try to optimize them
+is_String = SCons.Util.is_String
+is_List = SCons.Util.is_List
-_null = _Null
+class _null:
+ pass
print_actions = 1
execute_actions = 1
print_actions_presub = 0
-default_ENV = None
-
def rfile(n):
try:
return n.rfile()
except AttributeError:
return n
+def default_exitstatfunc(s):
+ return s
+
+try:
+ SET_LINENO = dis.SET_LINENO
+ HAVE_ARGUMENT = dis.HAVE_ARGUMENT
+except AttributeError:
+ remove_set_lineno_codes = lambda x: x
+else:
+ def remove_set_lineno_codes(code):
+ result = []
+ n = len(code)
+ i = 0
+ while i < n:
+ c = code[i]
+ op = ord(c)
+ if op >= HAVE_ARGUMENT:
+ if op != SET_LINENO:
+ result.append(code[i:i+3])
+ i = i+3
+ else:
+ result.append(c)
+ i = i+1
+ return ''.join(result)
+
+strip_quotes = re.compile('^[\'"](.*)[\'"]$')
+
+
+def _callable_contents(obj):
+ """Return the signature contents of a callable Python object.
+ """
+ try:
+ # Test if obj is a method.
+ return _function_contents(obj.im_func)
+
+ except AttributeError:
+ try:
+ # Test if obj is a callable object.
+ return _function_contents(obj.__call__.im_func)
+
+ except AttributeError:
+ try:
+ # Test if obj is a code object.
+ return _code_contents(obj)
+
+ except AttributeError:
+ # Test if obj is a function object.
+ return _function_contents(obj)
+
+
+def _object_contents(obj):
+ """Return the signature contents of any Python object.
+
+ We have to handle the case where object contains a code object
+ since it can be pickled directly.
+ """
+ try:
+ # Test if obj is a method.
+ return _function_contents(obj.im_func)
+
+ except AttributeError:
+ try:
+ # Test if obj is a callable object.
+ return _function_contents(obj.__call__.im_func)
+
+ except AttributeError:
+ try:
+ # Test if obj is a code object.
+ return _code_contents(obj)
+
+ except AttributeError:
+ try:
+ # Test if obj is a function object.
+ return _function_contents(obj)
+
+ except AttributeError:
+ # Should be a pickable Python object.
+ try:
+ return cPickle.dumps(obj)
+ except (cPickle.PicklingError, TypeError):
+ # This is weird, but it seems that nested classes
+ # are unpickable. The Python docs say it should
+ # always be a PicklingError, but some Python
+ # versions seem to return TypeError. Just do
+ # the best we can.
+ return str(obj)
+
+
+def _code_contents(code):
+ """Return the signature contents of a code object.
+
+ By providing direct access to the code object of the
+ function, Python makes this extremely easy. Hooray!
+
+ Unfortunately, older versions of Python include line
+ number indications in the compiled byte code. Boo!
+ So we remove the line number byte codes to prevent
+ recompilations from moving a Python function.
+ """
+
+ contents = []
+
+ # The code contents depends on the number of local variables
+ # but not their actual names.
+ contents.append("%s,%s" % (code.co_argcount, len(code.co_varnames)))
+ try:
+ contents.append(",%s,%s" % (len(code.co_cellvars), len(code.co_freevars)))
+ except AttributeError:
+ # Older versions of Python do not support closures.
+ contents.append(",0,0")
+
+ # The code contents depends on any constants accessed by the
+ # function. Note that we have to call _object_contents on each
+ # constants because the code object of nested functions can
+ # show-up among the constants.
+ #
+ # Note that we also always ignore the first entry of co_consts
+ # which contains the function doc string. We assume that the
+ # function does not access its doc string.
+ contents.append(',(' + ','.join(map(_object_contents,code.co_consts[1:])) + ')')
+
+ # The code contents depends on the variable names used to
+ # accessed global variable, as changing the variable name changes
+ # the variable actually accessed and therefore changes the
+ # function result.
+ contents.append(',(' + ','.join(map(_object_contents,code.co_names)) + ')')
+
+
+ # The code contents depends on its actual code!!!
+ contents.append(',(' + str(remove_set_lineno_codes(code.co_code)) + ')')
+
+ return ''.join(contents)
+
+
+def _function_contents(func):
+ """Return the signature contents of a function."""
+
+ contents = [_code_contents(func.func_code)]
+
+ # The function contents depends on the value of defaults arguments
+ if func.func_defaults:
+ contents.append(',(' + ','.join(map(_object_contents,func.func_defaults)) + ')')
+ else:
+ contents.append(',()')
+
+ # The function contents depends on the closure captured cell values.
+ try:
+ closure = func.func_closure or []
+ except AttributeError:
+ # Older versions of Python do not support closures.
+ closure = []
+
+ #xxx = [_object_contents(x.cell_contents) for x in closure]
+ try:
+ xxx = [_object_contents(x.cell_contents) for x in closure]
+ except AttributeError:
+ xxx = []
+ contents.append(',(' + ','.join(xxx) + ')')
+
+ return ''.join(contents)
+
+
def _actionAppend(act1, act2):
# This function knows how to slap two actions together.
# Mainly, it handles ListActions by concatenating into
else:
return ListAction([ a1, a2 ])
-class CommandGenerator:
+def _do_create_keywords(args, kw):
+ """This converts any arguments after the action argument into
+ their equivalent keywords and adds them to the kw argument.
"""
- Wraps a command generator function so the Action() factory
- function can tell a generator function from a function action.
- """
- def __init__(self, generator):
- self.generator = generator
-
- def __add__(self, other):
- return _actionAppend(self, other)
-
- def __radd__(self, other):
- return _actionAppend(other, self)
-
-def _do_create_action(act, *args, **kw):
+ v = kw.get('varlist', ())
+ # prevent varlist="FOO" from being interpreted as ['F', 'O', 'O']
+ if is_String(v): v = (v,)
+ kw['varlist'] = tuple(v)
+ if args:
+ # turn positional args into equivalent keywords
+ cmdstrfunc = args[0]
+ if cmdstrfunc is None or is_String(cmdstrfunc):
+ kw['cmdstr'] = cmdstrfunc
+ elif callable(cmdstrfunc):
+ kw['strfunction'] = cmdstrfunc
+ else:
+ raise SCons.Errors.UserError(
+ 'Invalid command display variable type. '
+ 'You must either pass a string or a callback which '
+ 'accepts (target, source, env) as parameters.')
+ if len(args) > 1:
+ kw['varlist'] = args[1:] + kw['varlist']
+ if kw.get('strfunction', _null) is not _null \
+ and kw.get('cmdstr', _null) is not _null:
+ raise SCons.Errors.UserError(
+ 'Cannot have both strfunction and cmdstr args to Action()')
+
+def _do_create_action(act, kw):
"""This is the actual "implementation" for the
Action factory method, below. This handles the
fact that passing lists to Action() itself has
if isinstance(act, ActionBase):
return act
- if SCons.Util.is_List(act):
- return apply(CommandAction, (act,)+args, kw)
- if isinstance(act, CommandGenerator):
- return apply(CommandGeneratorAction, (act.generator,)+args, kw)
+
+ if is_List(act):
+ #TODO(1.5) return CommandAction(act, **kw)
+ return CommandAction(act, **kw)
+
if callable(act):
- return apply(FunctionAction, (act,)+args, kw)
- if SCons.Util.is_String(act):
+ try:
+ gen = kw['generator']
+ del kw['generator']
+ except KeyError:
+ gen = 0
+ if gen:
+ action_type = CommandGeneratorAction
+ else:
+ action_type = FunctionAction
+ return action_type(act, kw)
+
+ if is_String(act):
var=SCons.Util.get_environment_var(act)
if var:
# This looks like a string that is purely an Environment
# of that Environment variable, so a user could put something
# like a function or a CommandGenerator in that variable
# instead of a string.
- return apply(LazyAction, (var,)+args, kw)
- commands = string.split(str(act), '\n')
+ return LazyAction(var, kw)
+ commands = str(act).split('\n')
if len(commands) == 1:
- return apply(CommandAction, (commands[0],)+args, kw)
- else:
- listCmdActions = map(lambda x, args=args, kw=kw:
- apply(CommandAction, (x,)+args, kw),
- commands)
- return ListAction(listCmdActions)
+ #TODO(1.5) return CommandAction(commands[0], **kw)
+ return CommandAction(commands[0], **kw)
+ # 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 ListAction([])
+ elif len(acts) == 1:
+ return acts[0]
+ else:
+ return ListAction(acts)
+
def Action(act, *args, **kw):
"""A factory for action objects."""
- if SCons.Util.is_List(act):
- acts = map(lambda a, args=args, kw=kw:
- apply(_do_create_action, (a,)+args, kw),
- act)
- acts = filter(None, acts)
- if len(acts) == 1:
- return acts[0]
- else:
- return ListAction(acts)
- else:
- return apply(_do_create_action, (act,)+args, kw)
+ # 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 no_batch_key(self, env, target, source):
+ return None
+
+ batch_key = no_batch_key
+
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.get_varlist(target, source, env)
+ if is_String(vl): vl = (vl,)
+ for v in vl:
+ result.append(env.subst('${'+v+'}'))
+ return ''.join(result)
+
def __add__(self, other):
return _actionAppend(self, other)
def presub_lines(self, env):
# CommandGeneratorAction needs a real environment
# in order to return the proper string here, since
- # it may call LazyCmdGenerator, which looks up a key
+ # 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')
+ lines = str(self).split('\n')
self.presub_env = None # don't need this any more
return lines
+ def get_varlist(self, target, source, env, executor=None):
+ return self.varlist
+
+ def get_targets(self, env, executor):
+ """
+ Returns the type of targets ($TARGETS, $CHANGED_TARGETS) used
+ by this action.
+ """
+ return self.targets
class _ActionAction(ActionBase):
"""Base class for actions that create output objects."""
- def __init__(self, strfunction=_null, presub=_null, chdir=None, **kw):
- if not strfunction is _null:
- self.strfunction = strfunction
- if presub is _null:
- presub = print_actions_presub
+ def __init__(self, cmdstr=_null, strfunction=_null, varlist=(),
+ presub=_null, chdir=None, exitstatfunc=None,
+ batch_key=None, targets='$TARGETS',
+ **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
+
+ self.targets = targets
+
+ if batch_key:
+ if not callable(batch_key):
+ # They have set batch_key, but not to their own
+ # callable. The default behavior here will batch
+ # *all* targets+sources using this action, separated
+ # for each construction environment.
+ def default_batch_key(self, env, target, source):
+ return (id(self), id(env))
+ batch_key = default_batch_key
+ SCons.Util.AddMethod(self, batch_key, 'batch_key')
def print_cmd_line(self, s, target, source, env):
sys.stdout.write(s + "\n")
def __call__(self, target, source, env,
- errfunc=None,
+ exitstatfunc=_null,
presub=_null,
show=_null,
execute=_null,
- chdir=_null):
- if not SCons.Util.is_List(target):
+ chdir=_null,
+ executor=None):
+ if not is_List(target):
target = [target]
- if not SCons.Util.is_List(source):
+ if not is_List(source):
source = [source]
- if presub is _null: presub = self.presub
+
+ 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
try:
chdir = str(chdir.abspath)
except AttributeError:
- if not SCons.Util.is_String(chdir):
- chdir = str(target[0].dir)
+ if not is_String(chdir):
+ if executor:
+ chdir = str(executor.batches[0].targets[0].dir)
+ else:
+ chdir = str(target[0].dir)
if presub:
- t = string.join(map(str, target), ' and ')
- l = string.join(self.presub_lines(env), '\n ')
+ if executor:
+ target = executor.get_all_targets()
+ source = executor.get_all_sources()
+ t = ' and '.join(map(str, target))
+ l = '\n '.join(self.presub_lines(env))
out = "Building %s with action:\n %s\n" % (t, l)
sys.stdout.write(out)
- s = None
+ cmd = None
if show and self.strfunction:
- s = self.strfunction(target, source, env)
- if s:
+ if executor:
+ target = executor.get_all_targets()
+ source = executor.get_all_sources()
+ try:
+ cmd = self.strfunction(target, source, env, executor)
+ except TypeError:
+ cmd = self.strfunction(target, source, env)
+ if cmd:
if chdir:
- s = ('os.chdir(%s)\n' % repr(chdir)) + s
+ cmd = ('os.chdir(%s)\n' % repr(chdir)) + cmd
try:
get = env.get
except AttributeError:
print_func = get('PRINT_CMD_LINE_FUNC')
if not print_func:
print_func = self.print_cmd_line
- print_func(s, target, source, env)
+ print_func(cmd, target, source, env)
stat = 0
if execute:
if chdir:
os.chdir(chdir)
try:
- stat = self.execute(target, source, env)
- if stat and errfunc:
- errfunc(stat)
+ stat = self.execute(target, source, env, executor=executor)
+ 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 s and save_cwd:
+ if cmd and save_cwd:
print_func('os.chdir(%s)' % repr(save_cwd), target, source, env)
+
return stat
if ' ' in arg or '\t' in arg:
arg = '"' + arg + '"'
cl.append(arg)
- return string.join(cl)
+ return ' '.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] = os.pathsep.join(map(str, value))
+ 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 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, cmdstr=None, *args, **kw):
+ 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
# factory above does). cmd will be passed to
# Environment.subst_list() for substituting environment
# variables.
- if __debug__: logInstanceCreation(self)
- apply(_ActionAction.__init__, (self,)+args, kw)
- if SCons.Util.is_List(cmd):
- if filter(SCons.Util.is_List, cmd):
+ if __debug__: logInstanceCreation(self, 'Action.CommandAction')
+
+ #TODO(1.5) _ActionAction.__init__(self, **kw)
+ _ActionAction.__init__(self, **kw)
+ if is_List(cmd):
+ if list(filter(is_List, cmd)):
raise TypeError, "CommandAction should be given only " \
"a single command"
self.cmd_list = cmd
- self.cmdstr = cmdstr
def __str__(self):
- if SCons.Util.is_List(self.cmd_list):
- return string.join(map(str, self.cmd_list), ' ')
+ if is_List(self.cmd_list):
+ return ' '.join(map(str, self.cmd_list))
return str(self.cmd_list)
- def strfunction(self, target, source, env):
- if not self.cmdstr is None:
- c = env.subst(self.cmdstr, 0, target, source)
+ def process(self, target, source, env, executor=None):
+ if executor:
+ result = env.subst_list(self.cmd_list, 0, executor=executor)
+ else:
+ result = env.subst_list(self.cmd_list, 0, target, source)
+ silent = None
+ ignore = None
+ while True:
+ 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, executor=None):
+ if self.cmdstr is None:
+ return None
+ if self.cmdstr is not _null:
+ from SCons.Subst import SUBST_RAW
+ if executor:
+ c = env.subst(self.cmdstr, SUBST_RAW, executor=executor)
+ else:
+ c = env.subst(self.cmdstr, SUBST_RAW, target, source)
if c:
return c
- cmd_list = env.subst_list(self.cmd_list, 0, target, source)
+ cmd_list, ignore, silent = self.process(target, source, env, executor)
+ if silent:
+ return ''
return _string_from_cmd_list(cmd_list[0])
- def execute(self, target, source, env):
+ def execute(self, target, source, env, executor=None):
"""Execute a command action.
This will handle lists of commands as well as individual commands,
handle lists of commands, even though that's not how we use it
externally.
"""
- from SCons.Util import is_String, is_List, flatten, escape_list
+ escape_list = SCons.Subst.escape_list
+ flatten_sequence = SCons.Util.flatten_sequence
try:
shell = env['SHELL']
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)
- try:
- ENV = env['ENV']
- except KeyError:
- global default_ENV
- if not default_ENV:
- import SCons.Environment
- default_ENV = SCons.Environment.Environment()['ENV']
- ENV = default_ENV
+ ENV = get_default_ENV(env)
# Ensure that the ENV values are all strings:
for key, value in ENV.items():
# 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(value)
- ENV[key] = string.join(map(str, value), os.pathsep)
+ value = flatten_sequence(value)
+ ENV[key] = os.pathsep.join(map(str, value))
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
# reasonable for just about everything else:
ENV[key] = str(value)
- cmd_list = env.subst_list(self.cmd_list, 0, target,
- map(rfile, source))
+ if executor:
+ target = executor.get_all_targets()
+ source = executor.get_all_sources()
+ cmd_list, ignore, silent = self.process(target, list(map(rfile, source)), env, executor)
# 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 result:
- return result
+ 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_contents(self, target, source, env):
+ def get_presig(self, target, source, env, executor=None):
"""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 SCons.Util.is_List(cmd):
- cmd = string.join(map(str, cmd))
+ if is_List(cmd):
+ cmd = ' '.join(map(str, cmd))
else:
cmd = str(cmd)
- return env.subst_target_source(cmd, SCons.Util.SUBST_SIG, target, source)
+ if executor:
+ return env.subst_target_source(cmd, SUBST_SIG, executor=executor)
+ else:
+ return env.subst_target_source(cmd, SUBST_SIG, target, source)
+
+ def get_implicit_deps(self, target, source, env, executor=None):
+ icd = env.get('IMPLICIT_COMMAND_DEPENDENCIES', True)
+ if is_String(icd) and icd[:1] == '$':
+ icd = env.subst(icd)
+ if not icd or icd in ('0', 'None'):
+ return []
+ from SCons.Subst import SUBST_SIG
+ if executor:
+ cmd_list = env.subst_list(self.cmd_list, SUBST_SIG, executor=executor)
+ else:
+ cmd_list = env.subst_list(self.cmd_list, SUBST_SIG, target, source)
+ res = []
+ for cmd_line in cmd_list:
+ if cmd_line:
+ d = str(cmd_line[0])
+ m = strip_quotes.match(d)
+ if m:
+ d = m.group(1)
+ d = env.WhereIs(d)
+ if d:
+ res.append(env.fs.File(d))
+ return res
class CommandGeneratorAction(ActionBase):
"""Class for command-generator actions."""
- def __init__(self, generator, *args, **kw):
- if __debug__: logInstanceCreation(self)
+ def __init__(self, generator, kw):
+ if __debug__: logInstanceCreation(self, 'Action.CommandGeneratorAction')
self.generator = generator
self.gen_kw = kw
+ self.varlist = kw.get('varlist', ())
+ self.targets = kw.get('targets', '$TARGETS')
- def _generate(self, target, source, env, for_signature):
+ def _generate(self, target, source, env, for_signature, executor=None):
# ensure that target is a list, to make it easier to write
# generator functions:
- if not SCons.Util.is_List(target):
+ if not is_List(target):
target = [target]
- ret = self.generator(target=target, source=source, env=env, for_signature=for_signature)
- gen_cmd = apply(Action, (ret,), self.gen_kw)
+ if executor:
+ target = executor.get_all_targets()
+ source = executor.get_all_sources()
+ 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 = 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 or {}
+ env = self.presub_env
except AttributeError:
- env = {}
+ 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 batch_key(self, env, target, source):
+ return self._generate(target, source, env, 1).batch_key(env, target, source)
- def __call__(self, target, source, env, errfunc=None, presub=_null,
- show=_null, execute=_null, chdir=_null):
- act = self._generate(target, source, env, 0)
- return act(target, source, env, errfunc, presub,
- show, execute, chdir)
+ def genstring(self, target, source, env, executor=None):
+ return self._generate(target, source, env, 1, executor).genstring(target, source, env)
- def get_contents(self, target, source, env):
+ def __call__(self, target, source, env, exitstatfunc=_null, presub=_null,
+ show=_null, execute=_null, chdir=_null, executor=None):
+ act = self._generate(target, source, env, 0, executor)
+ if act is None:
+ raise UserError("While building `%s': "
+ "Cannot deduce file extension from source files: %s"
+ % (repr(list(map(str, target))), repr(list(map(str, source)))))
+ return act(target, source, env, exitstatfunc, presub,
+ show, execute, chdir, executor)
+
+ def get_presig(self, target, source, env, executor=None):
"""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_contents(target, source, env)
+ return self._generate(target, source, env, 1, executor).get_presig(target, source, env)
-# Ooh, polymorphism -- pretty scary, eh, kids?
-#
-# A LazyCmdAction is a kind of hybrid generator and command action for
+ def get_implicit_deps(self, target, source, env, executor=None):
+ return self._generate(target, source, env, 1, executor).get_implicit_deps(target, source, env)
+
+ def get_varlist(self, target, source, env, executor=None):
+ return self._generate(target, source, env, 1, executor).get_varlist(target, source, env, executor)
+
+ def get_targets(self, env, executor):
+ return self._generate(None, None, env, 1, executor).get_targets(env, executor)
+
+
+
+# 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 $SOURCE"), but we also
# want to be able to replace them with functions in the construction
# the corresponding CommandAction method to do the heavy lifting.
# If not, then we call the same-named CommandGeneratorAction method.
# The CommandGeneratorAction methods work by using the overridden
-# _generate() method, uses our own way of handling "generation" of an
-# action based on what's in the construction variable.
+# _generate() method, that is, our own way of handling "generation" of
+# an action based on what's in the construction variable.
class LazyAction(CommandGeneratorAction, CommandAction):
- def __init__(self, var, *args, **kw):
- if __debug__: logInstanceCreation(self)
- apply(CommandAction.__init__, (self, '$'+var)+args, kw)
+
+ def __init__(self, var, kw):
+ if __debug__: logInstanceCreation(self, 'Action.LazyAction')
+ #FUTURE CommandAction.__init__(self, '${'+var+'}', **kw)
+ CommandAction.__init__(self, '${'+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 SCons.Util.is_String(c) and not '\n' in c:
+ if is_String(c) and not '\n' in c:
return CommandAction
return CommandGeneratorAction
- def _generate(self, target, source, env, for_signature):
- c = env.get(self.var, '')
- gen_cmd = apply(Action, (c,), self.gen_kw)
+ def _generate_cache(self, env):
+ if env:
+ c = env.get(self.var, '')
+ else:
+ c = ''
+ #TODO(1.5) gen_cmd = Action(c, **self.gen_kw)
+ gen_cmd = 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, executor=None):
+ 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)
- return apply(c.__call__, args, kw)
+ return c.__call__(self, target, source, env, *args, **kw)
- def get_contents(self, target, source, env):
+ def get_presig(self, target, source, env):
c = self.get_parent_class(env)
- return c.get_contents(self, target, source, env)
+ return c.get_presig(self, target, source, env)
+
+ def get_varlist(self, target, source, env, executor=None):
+ c = self.get_parent_class(env)
+ return c.get_varlist(self, target, source, env, executor)
+
class FunctionAction(_ActionAction):
"""Class for Python function actions."""
- def __init__(self, execfunction, *args, **kw):
- if __debug__: logInstanceCreation(self)
+ def __init__(self, execfunction, kw):
+ if __debug__: logInstanceCreation(self, 'Action.FunctionAction')
+
self.execfunction = execfunction
- apply(_ActionAction.__init__, (self,)+args, kw)
- self.varlist = kw.get('varlist', [])
+ 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)
+ _ActionAction.__init__(self, **kw)
def function_name(self):
try:
except AttributeError:
return "unknown_python_function"
- def strfunction(self, target, source, env):
+ def strfunction(self, target, source, env, executor=None):
+ if self.cmdstr is None:
+ return None
+ if self.cmdstr is not _null:
+ from SCons.Subst import SUBST_RAW
+ if executor:
+ c = env.subst(self.cmdstr, SUBST_RAW, executor=executor)
+ else:
+ c = env.subst(self.cmdstr, SUBST_RAW, target, source)
+ if c:
+ return c
def array(a):
def quote(s):
- return '"' + str(s) + '"'
- return '[' + string.join(map(quote, a), ", ") + ']'
+ try:
+ str_for_display = s.str_for_display
+ except AttributeError:
+ s = repr(s)
+ else:
+ s = str_for_display()
+ return s
+ return '[' + ", ".join(map(quote, a)) + ']'
try:
strfunc = self.execfunction.strfunction
except AttributeError:
return "%s(%s, %s)" % (name, tstr, sstr)
def __str__(self):
- return "%s(target, source, env)" % self.function_name()
+ name = self.function_name()
+ if name == 'ActionCaller':
+ return str(self.execfunction)
+ return "%s(target, source, env)" % name
- def execute(self, target, source, env):
- rsources = map(rfile, source)
+ def execute(self, target, source, env, executor=None):
+ exc_info = (None,None,None)
try:
- result = self.execfunction(target=target, source=rsources, env=env)
- except EnvironmentError, e:
- # If an IOError/OSError happens, raise a BuildError.
- raise SCons.Errors.BuildError(node=target, errstr=e.strerror)
- return result
-
- def get_contents(self, target, source, env):
- """Return the signature contents of this callable action.
+ if executor:
+ target = executor.get_all_targets()
+ source = executor.get_all_sources()
+ rsources = list(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()
- By providing direct access to the code object of the
- function, Python makes this extremely easy. Hooray!
- """
+ if result:
+ result = SCons.Errors.convert_to_BuildError(result, exc_info)
+ result.node=target
+ result.action=self
+ try:
+ result.command=self.strfunction(target, source, env, executor)
+ except TypeError:
+ 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:
- # "self.execfunction" is a function.
- contents = str(self.execfunction.func_code.co_code)
+ return self.gc(target, source, env)
except AttributeError:
- # "self.execfunction" is a callable object.
- try:
- contents = str(self.execfunction.__call__.im_func.func_code.co_code)
- except AttributeError:
- try:
- # See if execfunction will do the heavy lifting for us.
- gc = self.execfunction.get_contents
- except AttributeError:
- # This is weird, just do the best we can.
- contents = str(self.execfunction)
- else:
- contents = gc(target, source, env)
- return contents + env.subst(string.join(map(lambda v: '${'+v+'}',
- self.varlist)))
+ 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)
+ def __init__(self, actionlist):
+ 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)
+ self.list = list(map(list_of_actions, actionlist))
+ # our children will have had any varlist
+ # applied; we don't need to do it again
+ self.varlist = ()
+ self.targets = '$TARGETS'
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')
+ return '\n'.join([a.genstring(target, source, env) for a in self.list])
def __str__(self):
- return string.join(map(str, self.list), '\n')
-
+ return '\n'.join(map(str, self.list))
+
def presub_lines(self, env):
- return SCons.Util.flatten(map(lambda a, env=env:
- a.presub_lines(env),
- self.list))
+ return SCons.Util.flatten_sequence(
+ [a.presub_lines(env) for a in self.list])
- def get_contents(self, target, source, env):
+ 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),
- "")
+ return "".join([x.get_contents(target, source, env) for x in self.list])
- def __call__(self, target, source, env, errfunc=None, presub=_null,
- show=_null, execute=_null, chdir=_null):
+ def __call__(self, target, source, env, exitstatfunc=_null, presub=_null,
+ show=_null, execute=_null, chdir=_null, executor=None):
+ if executor:
+ target = executor.get_all_targets()
+ source = executor.get_all_sources()
for act in self.list:
- stat = act(target, source, env, errfunc, presub,
- show, execute, chdir)
+ stat = act(target, source, env, exitstatfunc, presub,
+ show, execute, chdir, executor)
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
+
+ def get_varlist(self, target, source, env, executor=None):
+ result = SCons.Util.OrderedDict()
+ for act in self.list:
+ for var in act.get_varlist(target, source, env, executor):
+ result[var] = True
+ return result.keys()
+
class ActionCaller:
"""A class for delaying calling an Action function with specific
(positional and keyword) arguments until the Action is actually
self.parent = parent
self.args = args
self.kw = kw
+
def get_contents(self, target, source, env):
actfunc = self.parent.actfunc
try:
# 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
- else:
- return env.subst(s, 0, target, source)
+ 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)
+ return [self.subst(x, target, source, env) for x in 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):
+
+ def __call__(self, target, source, env, executor=None):
args = self.subst_args(target, source, env)
kw = self.subst_kw(target, source, env)
- return apply(self.parent.actfunc, args, kw)
+ #TODO(1.5) return self.parent.actfunc(*args, **kw)
+ return 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)
- return apply(self.parent.strfunc, args, kw)
+ #TODO(1.5) return self.parent.strfunc(*args, **kw)
+ return self.parent.strfunc(*args, **kw)
+
+ def __str__(self):
+ #TODO(1.5) return self.parent.strfunc(*self.args, **self.kw)
+ return self.parent.strfunc(*self.args, **self.kw)
class ActionFactory:
"""A factory class that will wrap up an arbitrary function
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):
+ 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)
- # action will be a FunctionAction; if left to its own devices,
- # a genstr or str of this action will just show
- # "ActionCaller(target, source, env)". Override that with the
- # description from strfunc. Note that the apply is evaluated
- # right now; __str__ is set to a (lambda) function that just
- # returns the stored result of the evaluation whenever called.
- action.__str__ = lambda name=apply(self.strfunc, args, kw): name
return action
+
+# Local Variables:
+# tab-width:4
+# indent-tabs-mode:nil
+# End:
+# vim: set expandtab tabstop=4 shiftwidth=4:
projects / scons.git / blobdiff