mirror of
https://gitlab.com/ita1024/waf.git
synced 2024-11-26 11:51:20 +01:00
829 lines
23 KiB
Python
829 lines
23 KiB
Python
#!/usr/bin/env python
|
|
# encoding: utf-8
|
|
# Thomas Nagy, 2005-2010 (ita)
|
|
|
|
"""
|
|
Task generators
|
|
|
|
The class :py:class:`waflib.TaskGen.task_gen` encapsulates the creation of task objects (low-level code)
|
|
The instances can have various parameters, but the creation of task nodes (Task.py)
|
|
is always postponed. To achieve this, various methods are called from the method "apply"
|
|
|
|
|
|
"""
|
|
|
|
import copy, re, os
|
|
from waflib import Task, Utils, Logs, Errors, ConfigSet, Node
|
|
|
|
feats = Utils.defaultdict(set)
|
|
"""remember the methods declaring features"""
|
|
|
|
class task_gen(object):
|
|
"""
|
|
Instances of this class create :py:class:`waflib.Task.TaskBase` when
|
|
calling the method :py:meth:`waflib.TaskGen.task_gen.post` from the main thread.
|
|
A few notes:
|
|
|
|
* The methods to call (*self.meths*) can be specified dynamically (removing, adding, ..)
|
|
* The 'features' are used to add methods to self.meths and then execute them
|
|
* The attribute 'path' is a node representing the location of the task generator
|
|
* The tasks created are added to the attribute *tasks*
|
|
* The attribute 'idx' is a counter of task generators in the same path
|
|
"""
|
|
|
|
mappings = Utils.ordered_iter_dict()
|
|
"""Mappings are global file extension mappings, they are retrieved in the order of definition"""
|
|
|
|
prec = Utils.defaultdict(list)
|
|
"""Dict holding the precedence rules for task generator methods"""
|
|
|
|
def __init__(self, *k, **kw):
|
|
"""
|
|
The task generator objects predefine various attributes (source, target) for possible
|
|
processing by process_rule (make-like rules) or process_source (extensions, misc methods)
|
|
|
|
The tasks are stored on the attribute 'tasks'. They are created by calling methods
|
|
listed in self.meths *or* referenced in the attribute features
|
|
A topological sort is performed to ease the method re-use.
|
|
|
|
The extra key/value elements passed in kw are set as attributes
|
|
"""
|
|
|
|
# so we will have to play with directed acyclic graphs
|
|
# detect cycles, etc
|
|
self.source = ''
|
|
self.target = ''
|
|
|
|
self.meths = []
|
|
"""
|
|
List of method names to execute (it is usually a good idea to avoid touching this)
|
|
"""
|
|
|
|
self.prec = Utils.defaultdict(list)
|
|
"""
|
|
Precedence table for sorting the methods in self.meths
|
|
"""
|
|
|
|
self.mappings = {}
|
|
"""
|
|
List of mappings {extension -> function} for processing files by extension
|
|
This is very rarely used, so we do not use an ordered dict here
|
|
"""
|
|
|
|
self.features = []
|
|
"""
|
|
List of feature names for bringing new methods in
|
|
"""
|
|
|
|
self.tasks = []
|
|
"""
|
|
List of tasks created.
|
|
"""
|
|
|
|
if not 'bld' in kw:
|
|
# task generators without a build context :-/
|
|
self.env = ConfigSet.ConfigSet()
|
|
self.idx = 0
|
|
self.path = None
|
|
else:
|
|
self.bld = kw['bld']
|
|
self.env = self.bld.env.derive()
|
|
self.path = self.bld.path # emulate chdir when reading scripts
|
|
|
|
# provide a unique id
|
|
try:
|
|
self.idx = self.bld.idx[id(self.path)] = self.bld.idx.get(id(self.path), 0) + 1
|
|
except AttributeError:
|
|
self.bld.idx = {}
|
|
self.idx = self.bld.idx[id(self.path)] = 1
|
|
|
|
for key, val in kw.items():
|
|
setattr(self, key, val)
|
|
|
|
def __str__(self):
|
|
"""for debugging purposes"""
|
|
return "<task_gen %r declared in %s>" % (self.name, self.path.abspath())
|
|
|
|
def __repr__(self):
|
|
"""for debugging purposes"""
|
|
lst = []
|
|
for x in self.__dict__.keys():
|
|
if x not in ['env', 'bld', 'compiled_tasks', 'tasks']:
|
|
lst.append("%s=%s" % (x, repr(getattr(self, x))))
|
|
return "bld(%s) in %s" % (", ".join(lst), self.path.abspath())
|
|
|
|
def get_name(self):
|
|
"""
|
|
If not set, the name is computed from the target name::
|
|
|
|
def build(bld):
|
|
x = bld(name='foo')
|
|
x.get_name() # foo
|
|
y = bld(target='bar')
|
|
y.get_name() # bar
|
|
|
|
:rtype: string
|
|
:return: name of this task generator
|
|
"""
|
|
try:
|
|
return self._name
|
|
except AttributeError:
|
|
if isinstance(self.target, list):
|
|
lst = [str(x) for x in self.target]
|
|
name = self._name = ','.join(lst)
|
|
else:
|
|
name = self._name = str(self.target)
|
|
return name
|
|
def set_name(self, name):
|
|
self._name = name
|
|
|
|
name = property(get_name, set_name)
|
|
|
|
def to_list(self, val):
|
|
"""
|
|
Ensure that a parameter is a list
|
|
|
|
:type val: string or list of string
|
|
:param val: input to return as a list
|
|
:rtype: list
|
|
"""
|
|
if isinstance(val, str): return val.split()
|
|
else: return val
|
|
|
|
def post(self):
|
|
"""
|
|
Create task objects. The following operations are performed:
|
|
|
|
#. The body of this method is called only once and sets the attribute ``posted``
|
|
#. The attribute ``features`` is used to add more methods in ``self.meths``
|
|
#. The methods are sorted by the precedence table ``self.prec`` or `:waflib:attr:waflib.TaskGen.task_gen.prec`
|
|
#. The methods are then executed in order
|
|
#. The tasks created are added to :py:attr:`waflib.TaskGen.task_gen.tasks`
|
|
"""
|
|
|
|
# we could add a decorator to let the task run once, but then python 2.3 will be difficult to support
|
|
if getattr(self, 'posted', None):
|
|
#error("OBJECT ALREADY POSTED" + str( self))
|
|
return False
|
|
self.posted = True
|
|
|
|
keys = set(self.meths)
|
|
|
|
# add the methods listed in the features
|
|
self.features = Utils.to_list(self.features)
|
|
for x in self.features + ['*']:
|
|
st = feats[x]
|
|
if not st:
|
|
if not x in Task.classes:
|
|
Logs.warn('feature %r does not exist - bind at least one method to it' % x)
|
|
keys.update(list(st)) # ironpython 2.7 wants the cast to list
|
|
|
|
# copy the precedence table
|
|
prec = {}
|
|
prec_tbl = self.prec or task_gen.prec
|
|
for x in prec_tbl:
|
|
if x in keys:
|
|
prec[x] = prec_tbl[x]
|
|
|
|
# elements disconnected
|
|
tmp = []
|
|
for a in keys:
|
|
for x in prec.values():
|
|
if a in x: break
|
|
else:
|
|
tmp.append(a)
|
|
|
|
tmp.sort()
|
|
|
|
# topological sort
|
|
out = []
|
|
while tmp:
|
|
e = tmp.pop()
|
|
if e in keys: out.append(e)
|
|
try:
|
|
nlst = prec[e]
|
|
except KeyError:
|
|
pass
|
|
else:
|
|
del prec[e]
|
|
for x in nlst:
|
|
for y in prec:
|
|
if x in prec[y]:
|
|
break
|
|
else:
|
|
tmp.append(x)
|
|
|
|
if prec:
|
|
raise Errors.WafError('Cycle detected in the method execution %r' % prec)
|
|
out.reverse()
|
|
self.meths = out
|
|
|
|
# then we run the methods in order
|
|
Logs.debug('task_gen: posting %s %d' % (self, id(self)))
|
|
for x in out:
|
|
try:
|
|
v = getattr(self, x)
|
|
except AttributeError:
|
|
raise Errors.WafError('%r is not a valid task generator method' % x)
|
|
Logs.debug('task_gen: -> %s (%d)' % (x, id(self)))
|
|
v()
|
|
|
|
Logs.debug('task_gen: posted %s' % self.name)
|
|
return True
|
|
|
|
def get_hook(self, node):
|
|
"""
|
|
:param node: Input file to process
|
|
:type node: :py:class:`waflib.Tools.Node.Node`
|
|
:return: A method able to process the input node by looking at the extension
|
|
:rtype: function
|
|
"""
|
|
name = node.name
|
|
if self.mappings:
|
|
for k in self.mappings:
|
|
if name.endswith(k):
|
|
return self.mappings[k]
|
|
for k in task_gen.mappings:
|
|
if name.endswith(k):
|
|
return task_gen.mappings[k]
|
|
raise Errors.WafError("File %r has no mapping in %r (did you forget to load a waf tool?)" % (node, task_gen.mappings.keys()))
|
|
|
|
def create_task(self, name, src=None, tgt=None, **kw):
|
|
"""
|
|
Wrapper for creating task instances. The classes are retrieved from the
|
|
context class if possible, then from the global dict Task.classes.
|
|
|
|
:param name: task class name
|
|
:type name: string
|
|
:param src: input nodes
|
|
:type src: list of :py:class:`waflib.Tools.Node.Node`
|
|
:param tgt: output nodes
|
|
:type tgt: list of :py:class:`waflib.Tools.Node.Node`
|
|
:return: A task object
|
|
:rtype: :py:class:`waflib.Task.TaskBase`
|
|
"""
|
|
task = Task.classes[name](env=self.env.derive(), generator=self)
|
|
if src:
|
|
task.set_inputs(src)
|
|
if tgt:
|
|
task.set_outputs(tgt)
|
|
task.__dict__.update(kw)
|
|
self.tasks.append(task)
|
|
return task
|
|
|
|
def clone(self, env):
|
|
"""
|
|
Make a copy of a task generator. Once the copy is made, it is necessary to ensure that the
|
|
it does not create the same output files as the original, or the same files may
|
|
be compiled several times.
|
|
|
|
:param env: A configuration set
|
|
:type env: :py:class:`waflib.ConfigSet.ConfigSet`
|
|
:return: A copy
|
|
:rtype: :py:class:`waflib.TaskGen.task_gen`
|
|
"""
|
|
newobj = self.bld()
|
|
for x in self.__dict__:
|
|
if x in ['env', 'bld']:
|
|
continue
|
|
elif x in ['path', 'features']:
|
|
setattr(newobj, x, getattr(self, x))
|
|
else:
|
|
setattr(newobj, x, copy.copy(getattr(self, x)))
|
|
|
|
newobj.posted = False
|
|
if isinstance(env, str):
|
|
newobj.env = self.bld.all_envs[env].derive()
|
|
else:
|
|
newobj.env = env.derive()
|
|
|
|
return newobj
|
|
|
|
def declare_chain(name='', rule=None, reentrant=None, color='BLUE',
|
|
ext_in=[], ext_out=[], before=[], after=[], decider=None, scan=None, install_path=None, shell=False):
|
|
"""
|
|
Create a new mapping and a task class for processing files by extension.
|
|
See Tools/flex.py for an example.
|
|
|
|
:param name: name for the task class
|
|
:type name: string
|
|
:param rule: function to execute or string to be compiled in a function
|
|
:type rule: string or function
|
|
:param reentrant: re-inject the output file in the process (done automatically, set to 0 to disable)
|
|
:type reentrant: int
|
|
:param color: color for the task output
|
|
:type color: string
|
|
:param ext_in: execute the task only after the files of such extensions are created
|
|
:type ext_in: list of string
|
|
:param ext_out: execute the task only before files of such extensions are processed
|
|
:type ext_out: list of string
|
|
:param before: execute instances of this task before classes of the given names
|
|
:type before: list of string
|
|
:param after: execute instances of this task after classes of the given names
|
|
:type after: list of string
|
|
:param decider: if present, use it to create the output nodes for the task
|
|
:type decider: function
|
|
:param scan: scanner function for the task
|
|
:type scan: function
|
|
:param install_path: installation path for the output nodes
|
|
:type install_path: string
|
|
"""
|
|
ext_in = Utils.to_list(ext_in)
|
|
ext_out = Utils.to_list(ext_out)
|
|
if not name:
|
|
name = rule
|
|
cls = Task.task_factory(name, rule, color=color, ext_in=ext_in, ext_out=ext_out, before=before, after=after, scan=scan, shell=shell)
|
|
|
|
def x_file(self, node):
|
|
ext = decider and decider(self, node) or cls.ext_out
|
|
if ext_in:
|
|
_ext_in = ext_in[0]
|
|
|
|
tsk = self.create_task(name, node)
|
|
cnt = 0
|
|
|
|
keys = set(self.mappings.keys()) | set(self.__class__.mappings.keys())
|
|
for x in ext:
|
|
k = node.change_ext(x, ext_in=_ext_in)
|
|
tsk.outputs.append(k)
|
|
|
|
if reentrant != None:
|
|
if cnt < int(reentrant):
|
|
self.source.append(k)
|
|
else:
|
|
# reinject downstream files into the build
|
|
for y in keys: # ~ nfile * nextensions :-/
|
|
if k.name.endswith(y):
|
|
self.source.append(k)
|
|
break
|
|
cnt += 1
|
|
|
|
if install_path:
|
|
self.bld.install_files(install_path, tsk.outputs)
|
|
return tsk
|
|
|
|
for x in cls.ext_in:
|
|
task_gen.mappings[x] = x_file
|
|
return x_file
|
|
|
|
def taskgen_method(func):
|
|
"""
|
|
Decorator: register a method as a task generator method.
|
|
The function must accept a task generator as first parameter::
|
|
|
|
from waflib.TaskGen import taskgen_method
|
|
@taskgen_method
|
|
def mymethod(self):
|
|
pass
|
|
|
|
:param func: task generator method to add
|
|
:type func: function
|
|
:rtype: function
|
|
"""
|
|
setattr(task_gen, func.__name__, func)
|
|
return func
|
|
|
|
def feature(*k):
|
|
"""
|
|
Decorator: register a task generator method that will be executed when the
|
|
object attribute 'feature' contains the corresponding key(s)::
|
|
|
|
from waflib.Task import feature
|
|
@feature('myfeature')
|
|
def myfunction(self):
|
|
print('that is my feature!')
|
|
def build(bld):
|
|
bld(features='myfeature')
|
|
|
|
:param k: feature names
|
|
:type k: list of string
|
|
"""
|
|
def deco(func):
|
|
setattr(task_gen, func.__name__, func)
|
|
for name in k:
|
|
feats[name].update([func.__name__])
|
|
return func
|
|
return deco
|
|
|
|
def before_method(*k):
|
|
"""
|
|
Decorator: register a task generator method which will be executed
|
|
before the functions of given name(s)::
|
|
|
|
from waflib.TaskGen import feature, before
|
|
@feature('myfeature')
|
|
@before_method('fun2')
|
|
def fun1(self):
|
|
print('feature 1!')
|
|
@feature('myfeature')
|
|
def fun2(self):
|
|
print('feature 2!')
|
|
def build(bld):
|
|
bld(features='myfeature')
|
|
|
|
:param k: method names
|
|
:type k: list of string
|
|
"""
|
|
def deco(func):
|
|
setattr(task_gen, func.__name__, func)
|
|
for fun_name in k:
|
|
if not func.__name__ in task_gen.prec[fun_name]:
|
|
task_gen.prec[fun_name].append(func.__name__)
|
|
#task_gen.prec[fun_name].sort()
|
|
return func
|
|
return deco
|
|
before = before_method
|
|
|
|
def after_method(*k):
|
|
"""
|
|
Decorator: register a task generator method which will be executed
|
|
after the functions of given name(s)::
|
|
|
|
from waflib.TaskGen import feature, after
|
|
@feature('myfeature')
|
|
@after_method('fun2')
|
|
def fun1(self):
|
|
print('feature 1!')
|
|
@feature('myfeature')
|
|
def fun2(self):
|
|
print('feature 2!')
|
|
def build(bld):
|
|
bld(features='myfeature')
|
|
|
|
:param k: method names
|
|
:type k: list of string
|
|
"""
|
|
def deco(func):
|
|
setattr(task_gen, func.__name__, func)
|
|
for fun_name in k:
|
|
if not fun_name in task_gen.prec[func.__name__]:
|
|
task_gen.prec[func.__name__].append(fun_name)
|
|
#task_gen.prec[func.__name__].sort()
|
|
return func
|
|
return deco
|
|
after = after_method
|
|
|
|
def extension(*k):
|
|
"""
|
|
Decorator: register a task generator method which will be invoked during
|
|
the processing of source files for the extension given::
|
|
|
|
from waflib import Task
|
|
class mytask(Task):
|
|
run_str = 'cp ${SRC} ${TGT}'
|
|
@extension('.moo')
|
|
def create_maa_file(self, node):
|
|
self.create_task('mytask', node, node.change_ext('.maa'))
|
|
def build(bld):
|
|
bld(source='foo.moo')
|
|
"""
|
|
def deco(func):
|
|
setattr(task_gen, func.__name__, func)
|
|
for x in k:
|
|
task_gen.mappings[x] = func
|
|
return func
|
|
return deco
|
|
|
|
# ---------------------------------------------------------------
|
|
# The following methods are task generator methods commonly used
|
|
# they are almost examples, the rest of waf core does not depend on them
|
|
|
|
@taskgen_method
|
|
def to_nodes(self, lst, path=None):
|
|
"""
|
|
Convert the input list into a list of nodes.
|
|
It is used by :py:func:`waflib.TaskGen.process_source` and :py:func:`waflib.TaskGen.process_rule`.
|
|
It is designed for source files, for folders, see :py:func:`waflib.Tools.ccroot.to_incnodes`:
|
|
|
|
:param lst: input list
|
|
:type lst: list of string and nodes
|
|
:param path: path from which to search the nodes (by default, :py:attr:`waflib.TaskGen.task_gen.path`)
|
|
:type path: :py:class:`waflib.Tools.Node.Node`
|
|
:rtype: list of :py:class:`waflib.Tools.Node.Node`
|
|
"""
|
|
tmp = []
|
|
path = path or self.path
|
|
find = path.find_resource
|
|
|
|
if isinstance(lst, self.path.__class__):
|
|
lst = [lst]
|
|
|
|
# either a list or a string, convert to a list of nodes
|
|
for x in Utils.to_list(lst):
|
|
if isinstance(x, str):
|
|
node = find(x)
|
|
else:
|
|
node = x
|
|
if not node:
|
|
raise Errors.WafError("source not found: %r in %r" % (x, self))
|
|
tmp.append(node)
|
|
return tmp
|
|
|
|
@feature('*')
|
|
def process_source(self):
|
|
"""
|
|
Process each element in the attribute ``source`` by extension.
|
|
|
|
#. The *source* list is converted through :py:meth:`waflib.TaskGen.to_nodes` to a list of :py:class:`waflib.Node.Node` first.
|
|
#. File extensions are mapped to methods having the signature: ``def meth(self, node)`` by :py:meth:`waflib.TaskGen.extension`
|
|
#. The method is retrieved through :py:meth:`waflib.TaskGen.task_gen.get_hook`
|
|
#. When called, the methods may modify self.source to append more source to process
|
|
#. The mappings can map an extension or a filename (see the code below)
|
|
"""
|
|
self.source = self.to_nodes(getattr(self, 'source', []))
|
|
for node in self.source:
|
|
self.get_hook(node)(self, node)
|
|
|
|
@feature('*')
|
|
@before_method('process_source')
|
|
def process_rule(self):
|
|
"""
|
|
Process the attribute ``rule``. When present, :py:meth:`waflib.TaskGen.process_source` is disabled::
|
|
|
|
def build(bld):
|
|
bld(rule='cp ${SRC} ${TGT}', source='wscript', target='bar.txt')
|
|
"""
|
|
if not getattr(self, 'rule', None):
|
|
return
|
|
|
|
# create the task class
|
|
name = str(getattr(self, 'name', None) or self.target or getattr(self.rule, '__name__', self.rule))
|
|
|
|
# or we can put the class in a cache for performance reasons
|
|
try:
|
|
cache = self.bld.cache_rule_attr
|
|
except AttributeError:
|
|
cache = self.bld.cache_rule_attr = {}
|
|
|
|
cls = None
|
|
if getattr(self, 'cache_rule', 'True'):
|
|
try:
|
|
cls = cache[(name, self.rule)]
|
|
except KeyError:
|
|
pass
|
|
if not cls:
|
|
cls = Task.task_factory(name, self.rule,
|
|
getattr(self, 'vars', []),
|
|
shell=getattr(self, 'shell', True), color=getattr(self, 'color', 'BLUE'),
|
|
scan = getattr(self, 'scan', None))
|
|
if getattr(self, 'scan', None):
|
|
cls.scan = self.scan
|
|
elif getattr(self, 'deps', None):
|
|
def scan(self):
|
|
nodes = []
|
|
for x in self.generator.to_list(getattr(self.generator, 'deps', None)):
|
|
node = self.generator.path.find_resource(x)
|
|
if not node:
|
|
self.generator.bld.fatal('Could not find %r (was it declared?)' % x)
|
|
nodes.append(node)
|
|
return [nodes, []]
|
|
cls.scan = scan
|
|
|
|
if getattr(self, 'update_outputs', None):
|
|
Task.update_outputs(cls)
|
|
|
|
if getattr(self, 'always', None):
|
|
Task.always_run(cls)
|
|
|
|
for x in ['after', 'before', 'ext_in', 'ext_out']:
|
|
setattr(cls, x, getattr(self, x, []))
|
|
|
|
if getattr(self, 'cache_rule', 'True'):
|
|
cache[(name, self.rule)] = cls
|
|
|
|
# now create one instance
|
|
tsk = self.create_task(name)
|
|
|
|
if getattr(self, 'target', None):
|
|
if isinstance(self.target, str):
|
|
self.target = self.target.split()
|
|
if not isinstance(self.target, list):
|
|
self.target = [self.target]
|
|
for x in self.target:
|
|
if isinstance(x, str):
|
|
tsk.outputs.append(self.path.find_or_declare(x))
|
|
else:
|
|
x.parent.mkdir() # if a node was given, create the required folders
|
|
tsk.outputs.append(x)
|
|
if getattr(self, 'install_path', None):
|
|
# from waf 1.5
|
|
# although convenient, it does not 1. allow to name the target file and 2. symlinks
|
|
# TODO remove in waf 1.7
|
|
self.bld.install_files(self.install_path, tsk.outputs)
|
|
|
|
if getattr(self, 'source', None):
|
|
tsk.inputs = self.to_nodes(self.source)
|
|
# bypass the execution of process_source by setting the source to an empty list
|
|
self.source = []
|
|
|
|
if getattr(self, 'cwd', None):
|
|
tsk.cwd = self.cwd
|
|
|
|
@feature('seq')
|
|
def sequence_order(self):
|
|
"""
|
|
Add a strict sequential constraint between the tasks generated by task generators.
|
|
It works because task generators are posted in order.
|
|
It will not post objects which belong to other folders.
|
|
|
|
Example::
|
|
|
|
bld(features='javac seq')
|
|
bld(features='jar seq')
|
|
|
|
To start a new sequence, set the attribute seq_start, for example::
|
|
|
|
obj = bld(features='seq')
|
|
obj.seq_start = True
|
|
|
|
Note that the method is executed in last position. This is more an
|
|
example than a widely-used solution.
|
|
"""
|
|
if self.meths and self.meths[-1] != 'sequence_order':
|
|
self.meths.append('sequence_order')
|
|
return
|
|
|
|
if getattr(self, 'seq_start', None):
|
|
return
|
|
|
|
# all the tasks previously declared must be run before these
|
|
if getattr(self.bld, 'prev', None):
|
|
self.bld.prev.post()
|
|
for x in self.bld.prev.tasks:
|
|
for y in self.tasks:
|
|
y.set_run_after(x)
|
|
|
|
self.bld.prev = self
|
|
|
|
|
|
re_m4 = re.compile('@(\w+)@', re.M)
|
|
|
|
class subst_pc(Task.Task):
|
|
"""
|
|
Create *.pc* files from *.pc.in*. The task is executed whenever an input variable used
|
|
in the substitution changes.
|
|
"""
|
|
|
|
def run(self):
|
|
"Substitutes variables in a .in file"
|
|
|
|
if getattr(self.generator, 'is_copy', None):
|
|
self.outputs[0].write(self.inputs[0].read('rb'), 'wb')
|
|
if getattr(self.generator, 'chmod', None):
|
|
os.chmod(self.outputs[0].abspath(), self.generator.chmod)
|
|
return None
|
|
|
|
if getattr(self.generator, 'fun', None):
|
|
self.generator.fun(self)
|
|
|
|
code = self.inputs[0].read(encoding=getattr(self.generator, 'encoding', 'ISO8859-1'))
|
|
if getattr(self.generator, 'subst_fun', None):
|
|
code = self.generator.subst_fun(self, code)
|
|
if code:
|
|
self.outputs[0].write(code, encoding=getattr(self.generator, 'encoding', 'ISO8859-1'))
|
|
return
|
|
|
|
# replace all % by %% to prevent errors by % signs
|
|
code = code.replace('%', '%%')
|
|
|
|
# extract the vars foo into lst and replace @foo@ by %(foo)s
|
|
lst = []
|
|
def repl(match):
|
|
g = match.group
|
|
if g(1):
|
|
lst.append(g(1))
|
|
return "%%(%s)s" % g(1)
|
|
return ''
|
|
code = re_m4.sub(repl, code)
|
|
|
|
try:
|
|
d = self.generator.dct
|
|
except AttributeError:
|
|
d = {}
|
|
for x in lst:
|
|
tmp = getattr(self.generator, x, '') or self.env.get_flat(x) or self.env.get_flat(x.upper())
|
|
d[x] = str(tmp)
|
|
|
|
code = code % d
|
|
self.outputs[0].write(code, encoding=getattr(self.generator, 'encoding', 'ISO8859-1'))
|
|
self.generator.bld.raw_deps[self.uid()] = self.dep_vars = lst
|
|
|
|
# make sure the signature is updated
|
|
try: delattr(self, 'cache_sig')
|
|
except AttributeError: pass
|
|
|
|
if getattr(self.generator, 'chmod', None):
|
|
os.chmod(self.outputs[0].abspath(), self.generator.chmod)
|
|
|
|
def sig_vars(self):
|
|
"""
|
|
Compute a hash (signature) of the variables used in the substitution
|
|
"""
|
|
bld = self.generator.bld
|
|
env = self.env
|
|
upd = self.m.update
|
|
|
|
if getattr(self.generator, 'fun', None):
|
|
upd(Utils.h_fun(self.generator.fun).encode())
|
|
if getattr(self.generator, 'subst_fun', None):
|
|
upd(Utils.h_fun(self.generator.subst_fun).encode())
|
|
|
|
# raw_deps: persistent custom values returned by the scanner
|
|
vars = self.generator.bld.raw_deps.get(self.uid(), [])
|
|
|
|
# hash both env vars and task generator attributes
|
|
act_sig = bld.hash_env_vars(env, vars)
|
|
upd(act_sig)
|
|
|
|
lst = [getattr(self.generator, x, '') for x in vars]
|
|
upd(Utils.h_list(lst))
|
|
|
|
return self.m.digest()
|
|
|
|
@extension('.pc.in')
|
|
def add_pcfile(self, node):
|
|
"""
|
|
Process *.pc.in* files to *.pc*. Install the results to ``${PREFIX}/lib/pkgconfig/``
|
|
|
|
def build(bld):
|
|
bld(source='foo.pc.in', install_path='${LIBDIR}/pkgconfig/')
|
|
"""
|
|
tsk = self.create_task('subst_pc', node, node.change_ext('.pc', '.pc.in'))
|
|
self.bld.install_files(getattr(self, 'install_path', '${LIBDIR}/pkgconfig/'), tsk.outputs)
|
|
|
|
class subst(subst_pc):
|
|
pass
|
|
|
|
@feature('subst')
|
|
@before_method('process_source', 'process_rule')
|
|
def process_subst(self):
|
|
"""
|
|
Define a transformation that substitutes the contents of *source* files to *target* files::
|
|
|
|
def build(bld):
|
|
bld(
|
|
features='subst',
|
|
source='foo.c.in',
|
|
target='foo.c',
|
|
install_path='${LIBDIR}/pkgconfig',
|
|
VAR = 'val'
|
|
)
|
|
|
|
The input files are supposed to contain macros of the form *@VAR@*, where *VAR* is an argument
|
|
of the task generator object.
|
|
|
|
This method overrides the processing by :py:meth:`waflib.TaskGen.process_source`.
|
|
"""
|
|
|
|
src = Utils.to_list(getattr(self, 'source', []))
|
|
if isinstance(src, Node.Node):
|
|
src = [src]
|
|
tgt = Utils.to_list(getattr(self, 'target', []))
|
|
if isinstance(tgt, Node.Node):
|
|
tgt = [tgt]
|
|
if len(src) != len(tgt):
|
|
raise Errors.WafError('invalid number of source/target for %r' % self)
|
|
|
|
for x, y in zip(src, tgt):
|
|
if not x or not y:
|
|
raise Errors.WafError('null source or target for %r' % self)
|
|
a, b = None, None
|
|
|
|
if isinstance(x, str) and isinstance(y, str) and x == y:
|
|
a = self.path.find_node(x)
|
|
b = self.path.get_bld().make_node(y)
|
|
if not os.path.isfile(b.abspath()):
|
|
b.sig = None
|
|
b.parent.mkdir()
|
|
else:
|
|
if isinstance(x, str):
|
|
a = self.path.find_resource(x)
|
|
elif isinstance(x, Node.Node):
|
|
a = x
|
|
if isinstance(y, str):
|
|
b = self.path.find_or_declare(y)
|
|
elif isinstance(y, Node.Node):
|
|
b = y
|
|
|
|
if not a:
|
|
raise Errors.WafError('cound not find %r for %r' % (x, self))
|
|
|
|
has_constraints = False
|
|
tsk = self.create_task('subst', a, b)
|
|
for k in ('after', 'before', 'ext_in', 'ext_out'):
|
|
val = getattr(self, k, None)
|
|
if val:
|
|
has_constraints = True
|
|
setattr(tsk, k, val)
|
|
|
|
# paranoid safety measure for the general case foo.in->foo.h with ambiguous dependencies
|
|
if not has_constraints and b.name.endswith('.h'):
|
|
tsk.before = [k for k in ('c', 'cxx') if k in Task.classes]
|
|
|
|
inst_to = getattr(self, 'install_path', None)
|
|
if inst_to:
|
|
self.bld.install_files(inst_to, b, chmod=getattr(self, 'chmod', Utils.O644))
|
|
|
|
self.source = []
|
|
|