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Diffstat (limited to 'waflib/TaskGen.py')
| -rw-r--r-- | waflib/TaskGen.py | 917 |
1 files changed, 0 insertions, 917 deletions
diff --git a/waflib/TaskGen.py b/waflib/TaskGen.py deleted file mode 100644 index a74e643..0000000 --- a/waflib/TaskGen.py +++ /dev/null @@ -1,917 +0,0 @@ -#!/usr/bin/env python -# encoding: utf-8 -# Thomas Nagy, 2005-2018 (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 deferred. To achieve this, various methods are called from the method "apply" -""" - -import copy, re, os, functools -from waflib import Task, Utils, Logs, Errors, ConfigSet, Node - -feats = Utils.defaultdict(set) -"""remember the methods declaring features""" - -HEADER_EXTS = ['.h', '.hpp', '.hxx', '.hh'] - -class task_gen(object): - """ - Instances of this class create :py:class:`waflib.Task.Task` 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 that are retrieved in the order of definition""" - - prec = Utils.defaultdict(set) - """Dict that holds the precedence execution rules for task generator methods""" - - def __init__(self, *k, **kw): - """ - Task generator objects predefine various attributes (source, target) for possible - processing by process_rule (make-like rules) or process_source (extensions, misc methods) - - 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 execute the methods in correct order. - - The extra key/value elements passed in ``kw`` are set as attributes - """ - self.source = [] - self.target = '' - - self.meths = [] - """ - List of method names to execute (internal) - """ - - self.features = [] - """ - List of feature names for bringing new methods in - """ - - self.tasks = [] - """ - Tasks created are added to this list - """ - - 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 index per folder - # This is part of a measure to prevent output file name collisions - path = self.path.abspath() - try: - self.idx = self.bld.idx[path] = self.bld.idx.get(path, 0) + 1 - except AttributeError: - self.bld.idx = {} - self.idx = self.bld.idx[path] = 1 - - # Record the global task generator count - try: - self.tg_idx_count = self.bld.tg_idx_count = self.bld.tg_idx_count + 1 - except AttributeError: - self.tg_idx_count = self.bld.tg_idx_count = 1 - - for key, val in kw.items(): - setattr(self, key, val) - - def __str__(self): - """Debugging helper""" - return "<task_gen %r declared in %s>" % (self.name, self.path.abspath()) - - def __repr__(self): - """Debugging helper""" - lst = [] - for x in self.__dict__: - 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_cwd(self): - """ - Current working directory for the task generator, defaults to the build directory. - This is still used in a few places but it should disappear at some point as the classes - define their own working directory. - - :rtype: :py:class:`waflib.Node.Node` - """ - return self.bld.bldnode - - def get_name(self): - """ - If the attribute ``name`` is not set on the instance, - 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): - """ - Ensures that a parameter is a list, see :py:func:`waflib.Utils.to_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): - """ - Creates tasks for this task generators. 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` - """ - if getattr(self, 'posted', None): - return False - self.posted = True - - keys = set(self.meths) - keys.update(feats['*']) - - # add the methods listed in the features - self.features = Utils.to_list(self.features) - for x in self.features: - st = feats[x] - if st: - keys.update(st) - elif not x in Task.classes: - Logs.warn('feature %r does not exist - bind at least one method to it?', x) - - # copy the precedence table - prec = {} - prec_tbl = self.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(reverse=True) - - # 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) - tmp.sort(reverse=True) - - if prec: - buf = ['Cycle detected in the method execution:'] - for k, v in prec.items(): - buf.append('- %s after %s' % (k, [x for x in v if x in prec])) - raise Errors.WafError('\n'.join(buf)) - 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): - """ - Returns the ``@extension`` method to call for a Node of a particular extension. - - :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 - for k in self.mappings: - try: - if name.endswith(k): - return self.mappings[k] - except TypeError: - # regexps objects - if k.match(name): - return self.mappings[k] - keys = list(self.mappings.keys()) - raise Errors.WafError("File %r has no mapping in %r (load a waf tool?)" % (node, keys)) - - def create_task(self, name, src=None, tgt=None, **kw): - """ - Creates task instances. - - :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.Task` - """ - 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): - """ - Makes 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): - """ - Creates 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, function that returns a list of output file extensions (overrides ext_out for output files, but not for the build order) - :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): - if ext_in: - _ext_in = ext_in[0] - - tsk = self.create_task(name, node) - cnt = 0 - - ext = decider(self, node) if decider else cls.ext_out - 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 self.mappings: # ~ nfile * nextensions :-/ - if k.name.endswith(y): - self.source.append(k) - break - cnt += 1 - - if install_path: - self.install_task = self.add_install_files(install_to=install_path, install_from=tsk.outputs) - return tsk - - for x in cls.ext_in: - task_gen.mappings[x] = x_file - return x_file - -def taskgen_method(func): - """ - Decorator that registers 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 that registers 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 that registera 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: - task_gen.prec[func.__name__].add(fun_name) - return func - return deco -before = before_method - -def after_method(*k): - """ - Decorator that registers 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: - task_gen.prec[fun_name].add(func.__name__) - return func - return deco -after = after_method - -def extension(*k): - """ - Decorator that registers 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 - -@taskgen_method -def to_nodes(self, lst, path=None): - """ - Flatten the input list of string/nodes/lists 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, Node.Node): - lst = [lst] - - for x in Utils.to_list(lst): - if isinstance(x, str): - node = find(x) - elif hasattr(x, 'name'): - node = x - else: - tmp.extend(self.to_nodes(x)) - continue - if not node: - raise Errors.WafError('source not found: %r in %r' % (x, self)) - tmp.append(node) - return tmp - -@feature('*') -def process_source(self): - """ - Processes 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): - """ - Processes 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') - - Main attributes processed: - - * rule: command to execute, it can be a tuple of strings for multiple commands - * chmod: permissions for the resulting files (integer value such as Utils.O755) - * shell: set to False to execute the command directly (default is True to use a shell) - * scan: scanner function - * vars: list of variables to trigger rebuilds, such as CFLAGS - * cls_str: string to display when executing the task - * cls_keyword: label to display when executing the task - * cache_rule: by default, try to re-use similar classes, set to False to disable - * source: list of Node or string objects representing the source files required by this task - * target: list of Node or string objects representing the files that this task creates - * cwd: current working directory (Node or string) - * stdout: standard output, set to None to prevent waf from capturing the text - * stderr: standard error, set to None to prevent waf from capturing the text - * timeout: timeout for command execution (Python 3) - * always: whether to always run the command (False by default) - * deep_inputs: whether the task must depend on the input file tasks too (False by default) - """ - 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 = {} - - chmod = getattr(self, 'chmod', None) - shell = getattr(self, 'shell', True) - color = getattr(self, 'color', 'BLUE') - scan = getattr(self, 'scan', None) - _vars = getattr(self, 'vars', []) - cls_str = getattr(self, 'cls_str', None) - cls_keyword = getattr(self, 'cls_keyword', None) - use_cache = getattr(self, 'cache_rule', 'True') - deep_inputs = getattr(self, 'deep_inputs', False) - - scan_val = has_deps = hasattr(self, 'deps') - if scan: - scan_val = id(scan) - - key = Utils.h_list((name, self.rule, chmod, shell, color, cls_str, cls_keyword, scan_val, _vars, deep_inputs)) - - cls = None - if use_cache: - try: - cls = cache[key] - except KeyError: - pass - if not cls: - rule = self.rule - if chmod is not None: - def chmod_fun(tsk): - for x in tsk.outputs: - os.chmod(x.abspath(), tsk.generator.chmod) - if isinstance(rule, tuple): - rule = list(rule) - rule.append(chmod_fun) - rule = tuple(rule) - else: - rule = (rule, chmod_fun) - - cls = Task.task_factory(name, rule, _vars, shell=shell, color=color) - - if cls_str: - setattr(cls, '__str__', self.cls_str) - - if cls_keyword: - setattr(cls, 'keyword', self.cls_keyword) - - if deep_inputs: - Task.deep_inputs(cls) - - if scan: - cls.scan = self.scan - elif has_deps: - 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 use_cache: - cache[key] = cls - - # now create one instance - tsk = self.create_task(name) - - for x in ('after', 'before', 'ext_in', 'ext_out'): - setattr(tsk, x, getattr(self, x, [])) - - if hasattr(self, 'stdout'): - tsk.stdout = self.stdout - - if hasattr(self, 'stderr'): - tsk.stderr = self.stderr - - if getattr(self, 'timeout', None): - tsk.timeout = self.timeout - - if getattr(self, 'always', None): - tsk.always_run = True - - 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): - self.install_task = self.add_install_files(install_to=self.install_path, - install_from=tsk.outputs, chmod=getattr(self, 'chmod', Utils.O644)) - - 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 - - if isinstance(tsk.run, functools.partial): - # Python documentation says: "partial objects defined in classes - # behave like static methods and do not transform into bound - # methods during instance attribute look-up." - tsk.run = functools.partial(tsk.run, tsk) - -@feature('seq') -def sequence_order(self): - """ - Adds 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): - """ - Creates *.pc* files from *.pc.in*. The task is executed whenever an input variable used - in the substitution changes. - """ - - def force_permissions(self): - "Private for the time being, we will probably refactor this into run_str=[run1,chmod]" - if getattr(self.generator, 'chmod', None): - for x in self.outputs: - os.chmod(x.abspath(), self.generator.chmod) - - def run(self): - "Substitutes variables in a .in file" - - if getattr(self.generator, 'is_copy', None): - for i, x in enumerate(self.outputs): - x.write(self.inputs[i].read('rb'), 'wb') - stat = os.stat(self.inputs[i].abspath()) # Preserve mtime of the copy - os.utime(self.outputs[i].abspath(), (stat.st_atime, stat.st_mtime)) - self.force_permissions() - return None - - if getattr(self.generator, 'fun', None): - ret = self.generator.fun(self) - if not ret: - self.force_permissions() - return ret - - code = self.inputs[0].read(encoding=getattr(self.generator, 'encoding', 'latin-1')) - if getattr(self.generator, 'subst_fun', None): - code = self.generator.subst_fun(self, code) - if code is not None: - self.outputs[0].write(code, encoding=getattr(self.generator, 'encoding', 'latin-1')) - self.force_permissions() - return None - - # 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 = getattr(self.generator, 're_m4', 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[x] or self.env[x.upper()] - try: - tmp = ''.join(tmp) - except TypeError: - tmp = str(tmp) - d[x] = tmp - - code = code % d - self.outputs[0].write(code, encoding=getattr(self.generator, 'encoding', 'latin-1')) - self.generator.bld.raw_deps[self.uid()] = lst - - # make sure the signature is updated - try: - delattr(self, 'cache_sig') - except AttributeError: - pass - - self.force_permissions() - - 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): - """ - Processes *.pc.in* files to *.pc*. Installs the results to ``${PREFIX}/lib/pkgconfig/`` by default - - def build(bld): - bld(source='foo.pc.in', install_path='${LIBDIR}/pkgconfig/') - """ - tsk = self.create_task('subst_pc', node, node.change_ext('.pc', '.pc.in')) - self.install_task = self.add_install_files( - install_to=getattr(self, 'install_path', '${LIBDIR}/pkgconfig/'), install_from=tsk.outputs) - -class subst(subst_pc): - pass - -@feature('subst') -@before_method('process_source', 'process_rule') -def process_subst(self): - """ - Defines 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.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('could not find %r for %r' % (x, self)) - - tsk = self.create_task('subst', a, b) - for k in ('after', 'before', 'ext_in', 'ext_out'): - val = getattr(self, k, None) - if val: - setattr(tsk, k, val) - - # paranoid safety measure for the general case foo.in->foo.h with ambiguous dependencies - for xt in HEADER_EXTS: - if b.name.endswith(xt): - tsk.ext_in = tsk.ext_in + ['.h'] - break - - inst_to = getattr(self, 'install_path', None) - if inst_to: - self.install_task = self.add_install_files(install_to=inst_to, - install_from=b, chmod=getattr(self, 'chmod', Utils.O644)) - - self.source = [] - |