1#!/usr/bin/env python 2# encoding: utf-8 3# Thomas Nagy, 2005-2018 (ita) 4 5""" 6Classes related to the build phase (build, clean, install, step, etc) 7 8The inheritance tree is the following: 9 10""" 11 12import os, sys, errno, re, shutil, stat 13try: 14 import cPickle 15except ImportError: 16 import pickle as cPickle 17from waflib import Node, Runner, TaskGen, Utils, ConfigSet, Task, Logs, Options, Context, Errors 18 19CACHE_DIR = 'c4che' 20"""Name of the cache directory""" 21 22CACHE_SUFFIX = '_cache.py' 23"""ConfigSet cache files for variants are written under :py:attr:´waflib.Build.CACHE_DIR´ in the form ´variant_name´_cache.py""" 24 25INSTALL = 1337 26"""Positive value '->' install, see :py:attr:`waflib.Build.BuildContext.is_install`""" 27 28UNINSTALL = -1337 29"""Negative value '<-' uninstall, see :py:attr:`waflib.Build.BuildContext.is_install`""" 30 31SAVED_ATTRS = 'root node_sigs task_sigs imp_sigs raw_deps node_deps'.split() 32"""Build class members to save between the runs; these should be all dicts 33except for `root` which represents a :py:class:`waflib.Node.Node` instance 34""" 35 36CFG_FILES = 'cfg_files' 37"""Files from the build directory to hash before starting the build (``config.h`` written during the configuration)""" 38 39POST_AT_ONCE = 0 40"""Post mode: all task generators are posted before any task executed""" 41 42POST_LAZY = 1 43"""Post mode: post the task generators group after group, the tasks in the next group are created when the tasks in the previous groups are done""" 44 45PROTOCOL = -1 46if sys.platform == 'cli': 47 PROTOCOL = 0 48 49class BuildContext(Context.Context): 50 '''executes the build''' 51 52 cmd = 'build' 53 variant = '' 54 55 def __init__(self, **kw): 56 super(BuildContext, self).__init__(**kw) 57 58 self.is_install = 0 59 """Non-zero value when installing or uninstalling file""" 60 61 self.top_dir = kw.get('top_dir', Context.top_dir) 62 """See :py:attr:`waflib.Context.top_dir`; prefer :py:attr:`waflib.Build.BuildContext.srcnode`""" 63 64 self.out_dir = kw.get('out_dir', Context.out_dir) 65 """See :py:attr:`waflib.Context.out_dir`; prefer :py:attr:`waflib.Build.BuildContext.bldnode`""" 66 67 self.run_dir = kw.get('run_dir', Context.run_dir) 68 """See :py:attr:`waflib.Context.run_dir`""" 69 70 self.launch_dir = Context.launch_dir 71 """See :py:attr:`waflib.Context.out_dir`; prefer :py:meth:`waflib.Build.BuildContext.launch_node`""" 72 73 self.post_mode = POST_LAZY 74 """Whether to post the task generators at once or group-by-group (default is group-by-group)""" 75 76 self.cache_dir = kw.get('cache_dir') 77 if not self.cache_dir: 78 self.cache_dir = os.path.join(self.out_dir, CACHE_DIR) 79 80 self.all_envs = {} 81 """Map names to :py:class:`waflib.ConfigSet.ConfigSet`, the empty string must map to the default environment""" 82 83 # ======================================= # 84 # cache variables 85 86 self.node_sigs = {} 87 """Dict mapping build nodes to task identifier (uid), it indicates whether a task created a particular file (persists across builds)""" 88 89 self.task_sigs = {} 90 """Dict mapping task identifiers (uid) to task signatures (persists across builds)""" 91 92 self.imp_sigs = {} 93 """Dict mapping task identifiers (uid) to implicit task dependencies used for scanning targets (persists across builds)""" 94 95 self.node_deps = {} 96 """Dict mapping task identifiers (uid) to node dependencies found by :py:meth:`waflib.Task.Task.scan` (persists across builds)""" 97 98 self.raw_deps = {} 99 """Dict mapping task identifiers (uid) to custom data returned by :py:meth:`waflib.Task.Task.scan` (persists across builds)""" 100 101 self.task_gen_cache_names = {} 102 103 self.jobs = Options.options.jobs 104 """Amount of jobs to run in parallel""" 105 106 self.targets = Options.options.targets 107 """List of targets to build (default: \\*)""" 108 109 self.keep = Options.options.keep 110 """Whether the build should continue past errors""" 111 112 self.progress_bar = Options.options.progress_bar 113 """ 114 Level of progress status: 115 116 0. normal output 117 1. progress bar 118 2. IDE output 119 3. No output at all 120 """ 121 122 # Manual dependencies. 123 self.deps_man = Utils.defaultdict(list) 124 """Manual dependencies set by :py:meth:`waflib.Build.BuildContext.add_manual_dependency`""" 125 126 # just the structure here 127 self.current_group = 0 128 """ 129 Current build group 130 """ 131 132 self.groups = [] 133 """ 134 List containing lists of task generators 135 """ 136 137 self.group_names = {} 138 """ 139 Map group names to the group lists. See :py:meth:`waflib.Build.BuildContext.add_group` 140 """ 141 142 for v in SAVED_ATTRS: 143 if not hasattr(self, v): 144 setattr(self, v, {}) 145 146 def get_variant_dir(self): 147 """Getter for the variant_dir attribute""" 148 if not self.variant: 149 return self.out_dir 150 return os.path.join(self.out_dir, os.path.normpath(self.variant)) 151 variant_dir = property(get_variant_dir, None) 152 153 def __call__(self, *k, **kw): 154 """ 155 Create a task generator and add it to the current build group. The following forms are equivalent:: 156 157 def build(bld): 158 tg = bld(a=1, b=2) 159 160 def build(bld): 161 tg = bld() 162 tg.a = 1 163 tg.b = 2 164 165 def build(bld): 166 tg = TaskGen.task_gen(a=1, b=2) 167 bld.add_to_group(tg, None) 168 169 :param group: group name to add the task generator to 170 :type group: string 171 """ 172 kw['bld'] = self 173 ret = TaskGen.task_gen(*k, **kw) 174 self.task_gen_cache_names = {} # reset the cache, each time 175 self.add_to_group(ret, group=kw.get('group')) 176 return ret 177 178 def __copy__(self): 179 """ 180 Build contexts cannot be copied 181 182 :raises: :py:class:`waflib.Errors.WafError` 183 """ 184 raise Errors.WafError('build contexts cannot be copied') 185 186 def load_envs(self): 187 """ 188 The configuration command creates files of the form ``build/c4che/NAMEcache.py``. This method 189 creates a :py:class:`waflib.ConfigSet.ConfigSet` instance for each ``NAME`` by reading those 190 files and stores them in :py:attr:`waflib.Build.BuildContext.allenvs`. 191 """ 192 node = self.root.find_node(self.cache_dir) 193 if not node: 194 raise Errors.WafError('The project was not configured: run "waf configure" first!') 195 lst = node.ant_glob('**/*%s' % CACHE_SUFFIX, quiet=True) 196 197 if not lst: 198 raise Errors.WafError('The cache directory is empty: reconfigure the project') 199 200 for x in lst: 201 name = x.path_from(node).replace(CACHE_SUFFIX, '').replace('\\', '/') 202 env = ConfigSet.ConfigSet(x.abspath()) 203 self.all_envs[name] = env 204 for f in env[CFG_FILES]: 205 newnode = self.root.find_resource(f) 206 if not newnode or not newnode.exists(): 207 raise Errors.WafError('Missing configuration file %r, reconfigure the project!' % f) 208 209 def init_dirs(self): 210 """ 211 Initialize the project directory and the build directory by creating the nodes 212 :py:attr:`waflib.Build.BuildContext.srcnode` and :py:attr:`waflib.Build.BuildContext.bldnode` 213 corresponding to ``top_dir`` and ``variant_dir`` respectively. The ``bldnode`` directory is 214 created if necessary. 215 """ 216 if not (os.path.isabs(self.top_dir) and os.path.isabs(self.out_dir)): 217 raise Errors.WafError('The project was not configured: run "waf configure" first!') 218 219 self.path = self.srcnode = self.root.find_dir(self.top_dir) 220 self.bldnode = self.root.make_node(self.variant_dir) 221 self.bldnode.mkdir() 222 223 def execute(self): 224 """ 225 Restore data from previous builds and call :py:meth:`waflib.Build.BuildContext.execute_build`. 226 Overrides from :py:func:`waflib.Context.Context.execute` 227 """ 228 self.restore() 229 if not self.all_envs: 230 self.load_envs() 231 self.execute_build() 232 233 def execute_build(self): 234 """ 235 Execute the build by: 236 237 * reading the scripts (see :py:meth:`waflib.Context.Context.recurse`) 238 * calling :py:meth:`waflib.Build.BuildContext.pre_build` to call user build functions 239 * calling :py:meth:`waflib.Build.BuildContext.compile` to process the tasks 240 * calling :py:meth:`waflib.Build.BuildContext.post_build` to call user build functions 241 """ 242 243 Logs.info("Waf: Entering directory `%s'", self.variant_dir) 244 self.recurse([self.run_dir]) 245 self.pre_build() 246 247 # display the time elapsed in the progress bar 248 self.timer = Utils.Timer() 249 250 try: 251 self.compile() 252 finally: 253 if self.progress_bar == 1 and sys.stderr.isatty(): 254 c = self.producer.processed or 1 255 m = self.progress_line(c, c, Logs.colors.BLUE, Logs.colors.NORMAL) 256 Logs.info(m, extra={'stream': sys.stderr, 'c1': Logs.colors.cursor_off, 'c2' : Logs.colors.cursor_on}) 257 Logs.info("Waf: Leaving directory `%s'", self.variant_dir) 258 try: 259 self.producer.bld = None 260 del self.producer 261 except AttributeError: 262 pass 263 self.post_build() 264 265 def restore(self): 266 """ 267 Load data from a previous run, sets the attributes listed in :py:const:`waflib.Build.SAVED_ATTRS` 268 """ 269 try: 270 env = ConfigSet.ConfigSet(os.path.join(self.cache_dir, 'build.config.py')) 271 except EnvironmentError: 272 pass 273 else: 274 if env.version < Context.HEXVERSION: 275 raise Errors.WafError('Project was configured with a different version of Waf, please reconfigure it') 276 277 for t in env.tools: 278 self.setup(**t) 279 280 dbfn = os.path.join(self.variant_dir, Context.DBFILE) 281 try: 282 data = Utils.readf(dbfn, 'rb') 283 except (EnvironmentError, EOFError): 284 # handle missing file/empty file 285 Logs.debug('build: Could not load the build cache %s (missing)', dbfn) 286 else: 287 try: 288 Node.pickle_lock.acquire() 289 Node.Nod3 = self.node_class 290 try: 291 data = cPickle.loads(data) 292 except Exception as e: 293 Logs.debug('build: Could not pickle the build cache %s: %r', dbfn, e) 294 else: 295 for x in SAVED_ATTRS: 296 setattr(self, x, data.get(x, {})) 297 finally: 298 Node.pickle_lock.release() 299 300 self.init_dirs() 301 302 def store(self): 303 """ 304 Store data for next runs, set the attributes listed in :py:const:`waflib.Build.SAVED_ATTRS`. Uses a temporary 305 file to avoid problems on ctrl+c. 306 """ 307 data = {} 308 for x in SAVED_ATTRS: 309 data[x] = getattr(self, x) 310 db = os.path.join(self.variant_dir, Context.DBFILE) 311 312 try: 313 Node.pickle_lock.acquire() 314 Node.Nod3 = self.node_class 315 x = cPickle.dumps(data, PROTOCOL) 316 finally: 317 Node.pickle_lock.release() 318 319 Utils.writef(db + '.tmp', x, m='wb') 320 321 try: 322 st = os.stat(db) 323 os.remove(db) 324 if not Utils.is_win32: # win32 has no chown but we're paranoid 325 os.chown(db + '.tmp', st.st_uid, st.st_gid) 326 except (AttributeError, OSError): 327 pass 328 329 # do not use shutil.move (copy is not thread-safe) 330 os.rename(db + '.tmp', db) 331 332 def compile(self): 333 """ 334 Run the build by creating an instance of :py:class:`waflib.Runner.Parallel` 335 The cache file is written when at least a task was executed. 336 337 :raises: :py:class:`waflib.Errors.BuildError` in case the build fails 338 """ 339 Logs.debug('build: compile()') 340 341 # delegate the producer-consumer logic to another object to reduce the complexity 342 self.producer = Runner.Parallel(self, self.jobs) 343 self.producer.biter = self.get_build_iterator() 344 try: 345 self.producer.start() 346 except KeyboardInterrupt: 347 if self.is_dirty(): 348 self.store() 349 raise 350 else: 351 if self.is_dirty(): 352 self.store() 353 354 if self.producer.error: 355 raise Errors.BuildError(self.producer.error) 356 357 def is_dirty(self): 358 return self.producer.dirty 359 360 def setup(self, tool, tooldir=None, funs=None): 361 """ 362 Import waf tools defined during the configuration:: 363 364 def configure(conf): 365 conf.load('glib2') 366 367 def build(bld): 368 pass # glib2 is imported implicitly 369 370 :param tool: tool list 371 :type tool: list 372 :param tooldir: optional tool directory (sys.path) 373 :type tooldir: list of string 374 :param funs: unused variable 375 """ 376 if isinstance(tool, list): 377 for i in tool: 378 self.setup(i, tooldir) 379 return 380 381 module = Context.load_tool(tool, tooldir) 382 if hasattr(module, "setup"): 383 module.setup(self) 384 385 def get_env(self): 386 """Getter for the env property""" 387 try: 388 return self.all_envs[self.variant] 389 except KeyError: 390 return self.all_envs[''] 391 def set_env(self, val): 392 """Setter for the env property""" 393 self.all_envs[self.variant] = val 394 395 env = property(get_env, set_env) 396 397 def add_manual_dependency(self, path, value): 398 """ 399 Adds a dependency from a node object to a value:: 400 401 def build(bld): 402 bld.add_manual_dependency( 403 bld.path.find_resource('wscript'), 404 bld.root.find_resource('/etc/fstab')) 405 406 :param path: file path 407 :type path: string or :py:class:`waflib.Node.Node` 408 :param value: value to depend 409 :type value: :py:class:`waflib.Node.Node`, byte object, or function returning a byte object 410 """ 411 if not path: 412 raise ValueError('Invalid input path %r' % path) 413 414 if isinstance(path, Node.Node): 415 node = path 416 elif os.path.isabs(path): 417 node = self.root.find_resource(path) 418 else: 419 node = self.path.find_resource(path) 420 if not node: 421 raise ValueError('Could not find the path %r' % path) 422 423 if isinstance(value, list): 424 self.deps_man[node].extend(value) 425 else: 426 self.deps_man[node].append(value) 427 428 def launch_node(self): 429 """Returns the launch directory as a :py:class:`waflib.Node.Node` object (cached)""" 430 try: 431 # private cache 432 return self.p_ln 433 except AttributeError: 434 self.p_ln = self.root.find_dir(self.launch_dir) 435 return self.p_ln 436 437 def hash_env_vars(self, env, vars_lst): 438 """ 439 Hashes configuration set variables:: 440 441 def build(bld): 442 bld.hash_env_vars(bld.env, ['CXX', 'CC']) 443 444 This method uses an internal cache. 445 446 :param env: Configuration Set 447 :type env: :py:class:`waflib.ConfigSet.ConfigSet` 448 :param vars_lst: list of variables 449 :type vars_list: list of string 450 """ 451 452 if not env.table: 453 env = env.parent 454 if not env: 455 return Utils.SIG_NIL 456 457 idx = str(id(env)) + str(vars_lst) 458 try: 459 cache = self.cache_env 460 except AttributeError: 461 cache = self.cache_env = {} 462 else: 463 try: 464 return self.cache_env[idx] 465 except KeyError: 466 pass 467 468 lst = [env[a] for a in vars_lst] 469 cache[idx] = ret = Utils.h_list(lst) 470 Logs.debug('envhash: %s %r', Utils.to_hex(ret), lst) 471 return ret 472 473 def get_tgen_by_name(self, name): 474 """ 475 Fetches a task generator by its name or its target attribute; 476 the name must be unique in a build:: 477 478 def build(bld): 479 tg = bld(name='foo') 480 tg == bld.get_tgen_by_name('foo') 481 482 This method use a private internal cache. 483 484 :param name: Task generator name 485 :raises: :py:class:`waflib.Errors.WafError` in case there is no task genenerator by that name 486 """ 487 cache = self.task_gen_cache_names 488 if not cache: 489 # create the index lazily 490 for g in self.groups: 491 for tg in g: 492 try: 493 cache[tg.name] = tg 494 except AttributeError: 495 # raised if not a task generator, which should be uncommon 496 pass 497 try: 498 return cache[name] 499 except KeyError: 500 raise Errors.WafError('Could not find a task generator for the name %r' % name) 501 502 def progress_line(self, idx, total, col1, col2): 503 """ 504 Computes a progress bar line displayed when running ``waf -p`` 505 506 :returns: progress bar line 507 :rtype: string 508 """ 509 if not sys.stderr.isatty(): 510 return '' 511 512 n = len(str(total)) 513 514 Utils.rot_idx += 1 515 ind = Utils.rot_chr[Utils.rot_idx % 4] 516 517 pc = (100. * idx)/total 518 fs = "[%%%dd/%%d][%%s%%2d%%%%%%s][%s][" % (n, ind) 519 left = fs % (idx, total, col1, pc, col2) 520 right = '][%s%s%s]' % (col1, self.timer, col2) 521 522 cols = Logs.get_term_cols() - len(left) - len(right) + 2*len(col1) + 2*len(col2) 523 if cols < 7: 524 cols = 7 525 526 ratio = ((cols * idx)//total) - 1 527 528 bar = ('='*ratio+'>').ljust(cols) 529 msg = Logs.indicator % (left, bar, right) 530 531 return msg 532 533 def declare_chain(self, *k, **kw): 534 """ 535 Wraps :py:func:`waflib.TaskGen.declare_chain` for convenience 536 """ 537 return TaskGen.declare_chain(*k, **kw) 538 539 def pre_build(self): 540 """Executes user-defined methods before the build starts, see :py:meth:`waflib.Build.BuildContext.add_pre_fun`""" 541 for m in getattr(self, 'pre_funs', []): 542 m(self) 543 544 def post_build(self): 545 """Executes user-defined methods after the build is successful, see :py:meth:`waflib.Build.BuildContext.add_post_fun`""" 546 for m in getattr(self, 'post_funs', []): 547 m(self) 548 549 def add_pre_fun(self, meth): 550 """ 551 Binds a callback method to execute after the scripts are read and before the build starts:: 552 553 def mycallback(bld): 554 print("Hello, world!") 555 556 def build(bld): 557 bld.add_pre_fun(mycallback) 558 """ 559 try: 560 self.pre_funs.append(meth) 561 except AttributeError: 562 self.pre_funs = [meth] 563 564 def add_post_fun(self, meth): 565 """ 566 Binds a callback method to execute immediately after the build is successful:: 567 568 def call_ldconfig(bld): 569 bld.exec_command('/sbin/ldconfig') 570 571 def build(bld): 572 if bld.cmd == 'install': 573 bld.add_pre_fun(call_ldconfig) 574 """ 575 try: 576 self.post_funs.append(meth) 577 except AttributeError: 578 self.post_funs = [meth] 579 580 def get_group(self, x): 581 """ 582 Returns the build group named `x`, or the current group if `x` is None 583 584 :param x: name or number or None 585 :type x: string, int or None 586 """ 587 if not self.groups: 588 self.add_group() 589 if x is None: 590 return self.groups[self.current_group] 591 if x in self.group_names: 592 return self.group_names[x] 593 return self.groups[x] 594 595 def add_to_group(self, tgen, group=None): 596 """Adds a task or a task generator to the build; there is no attempt to remove it if it was already added.""" 597 assert(isinstance(tgen, TaskGen.task_gen) or isinstance(tgen, Task.Task)) 598 tgen.bld = self 599 self.get_group(group).append(tgen) 600 601 def get_group_name(self, g): 602 """ 603 Returns the name of the input build group 604 605 :param g: build group object or build group index 606 :type g: integer or list 607 :return: name 608 :rtype: string 609 """ 610 if not isinstance(g, list): 611 g = self.groups[g] 612 for x in self.group_names: 613 if id(self.group_names[x]) == id(g): 614 return x 615 return '' 616 617 def get_group_idx(self, tg): 618 """ 619 Returns the index of the group containing the task generator given as argument:: 620 621 def build(bld): 622 tg = bld(name='nada') 623 0 == bld.get_group_idx(tg) 624 625 :param tg: Task generator object 626 :type tg: :py:class:`waflib.TaskGen.task_gen` 627 :rtype: int 628 """ 629 se = id(tg) 630 for i, tmp in enumerate(self.groups): 631 for t in tmp: 632 if id(t) == se: 633 return i 634 return None 635 636 def add_group(self, name=None, move=True): 637 """ 638 Adds a new group of tasks/task generators. By default the new group becomes 639 the default group for new task generators (make sure to create build groups in order). 640 641 :param name: name for this group 642 :type name: string 643 :param move: set this new group as default group (True by default) 644 :type move: bool 645 :raises: :py:class:`waflib.Errors.WafError` if a group by the name given already exists 646 """ 647 if name and name in self.group_names: 648 raise Errors.WafError('add_group: name %s already present', name) 649 g = [] 650 self.group_names[name] = g 651 self.groups.append(g) 652 if move: 653 self.current_group = len(self.groups) - 1 654 655 def set_group(self, idx): 656 """ 657 Sets the build group at position idx as current so that newly added 658 task generators are added to this one by default:: 659 660 def build(bld): 661 bld(rule='touch ${TGT}', target='foo.txt') 662 bld.add_group() # now the current group is 1 663 bld(rule='touch ${TGT}', target='bar.txt') 664 bld.set_group(0) # now the current group is 0 665 bld(rule='touch ${TGT}', target='truc.txt') # build truc.txt before bar.txt 666 667 :param idx: group name or group index 668 :type idx: string or int 669 """ 670 if isinstance(idx, str): 671 g = self.group_names[idx] 672 for i, tmp in enumerate(self.groups): 673 if id(g) == id(tmp): 674 self.current_group = i 675 break 676 else: 677 self.current_group = idx 678 679 def total(self): 680 """ 681 Approximate task count: this value may be inaccurate if task generators 682 are posted lazily (see :py:attr:`waflib.Build.BuildContext.post_mode`). 683 The value :py:attr:`waflib.Runner.Parallel.total` is updated during the task execution. 684 685 :rtype: int 686 """ 687 total = 0 688 for group in self.groups: 689 for tg in group: 690 try: 691 total += len(tg.tasks) 692 except AttributeError: 693 total += 1 694 return total 695 696 def get_targets(self): 697 """ 698 This method returns a pair containing the index of the last build group to post, 699 and the list of task generator objects corresponding to the target names. 700 701 This is used internally by :py:meth:`waflib.Build.BuildContext.get_build_iterator` 702 to perform partial builds:: 703 704 $ waf --targets=myprogram,myshlib 705 706 :return: the minimum build group index, and list of task generators 707 :rtype: tuple 708 """ 709 to_post = [] 710 min_grp = 0 711 for name in self.targets.split(','): 712 tg = self.get_tgen_by_name(name) 713 m = self.get_group_idx(tg) 714 if m > min_grp: 715 min_grp = m 716 to_post = [tg] 717 elif m == min_grp: 718 to_post.append(tg) 719 return (min_grp, to_post) 720 721 def get_all_task_gen(self): 722 """ 723 Returns a list of all task generators for troubleshooting purposes. 724 """ 725 lst = [] 726 for g in self.groups: 727 lst.extend(g) 728 return lst 729 730 def post_group(self): 731 """ 732 Post task generators from the group indexed by self.current_group; used internally 733 by :py:meth:`waflib.Build.BuildContext.get_build_iterator` 734 """ 735 def tgpost(tg): 736 try: 737 f = tg.post 738 except AttributeError: 739 pass 740 else: 741 f() 742 743 if self.targets == '*': 744 for tg in self.groups[self.current_group]: 745 tgpost(tg) 746 elif self.targets: 747 if self.current_group < self._min_grp: 748 for tg in self.groups[self.current_group]: 749 tgpost(tg) 750 else: 751 for tg in self._exact_tg: 752 tg.post() 753 else: 754 ln = self.launch_node() 755 if ln.is_child_of(self.bldnode): 756 if Logs.verbose > 1: 757 Logs.warn('Building from the build directory, forcing --targets=*') 758 ln = self.srcnode 759 elif not ln.is_child_of(self.srcnode): 760 if Logs.verbose > 1: 761 Logs.warn('CWD %s is not under %s, forcing --targets=* (run distclean?)', ln.abspath(), self.srcnode.abspath()) 762 ln = self.srcnode 763 764 def is_post(tg, ln): 765 try: 766 p = tg.path 767 except AttributeError: 768 pass 769 else: 770 if p.is_child_of(ln): 771 return True 772 773 def is_post_group(): 774 for i, g in enumerate(self.groups): 775 if i > self.current_group: 776 for tg in g: 777 if is_post(tg, ln): 778 return True 779 780 if self.post_mode == POST_LAZY and ln != self.srcnode: 781 # partial folder builds require all targets from a previous build group 782 if is_post_group(): 783 ln = self.srcnode 784 785 for tg in self.groups[self.current_group]: 786 if is_post(tg, ln): 787 tgpost(tg) 788 789 def get_tasks_group(self, idx): 790 """ 791 Returns all task instances for the build group at position idx, 792 used internally by :py:meth:`waflib.Build.BuildContext.get_build_iterator` 793 794 :rtype: list of :py:class:`waflib.Task.Task` 795 """ 796 tasks = [] 797 for tg in self.groups[idx]: 798 try: 799 tasks.extend(tg.tasks) 800 except AttributeError: # not a task generator 801 tasks.append(tg) 802 return tasks 803 804 def get_build_iterator(self): 805 """ 806 Creates a Python generator object that returns lists of tasks that may be processed in parallel. 807 808 :return: tasks which can be executed immediately 809 :rtype: generator returning lists of :py:class:`waflib.Task.Task` 810 """ 811 if self.targets and self.targets != '*': 812 (self._min_grp, self._exact_tg) = self.get_targets() 813 814 if self.post_mode != POST_LAZY: 815 for self.current_group, _ in enumerate(self.groups): 816 self.post_group() 817 818 for self.current_group, _ in enumerate(self.groups): 819 # first post the task generators for the group 820 if self.post_mode != POST_AT_ONCE: 821 self.post_group() 822 823 # then extract the tasks 824 tasks = self.get_tasks_group(self.current_group) 825 826 # if the constraints are set properly (ext_in/ext_out, before/after) 827 # the call to set_file_constraints may be removed (can be a 15% penalty on no-op rebuilds) 828 # (but leave set_file_constraints for the installation step) 829 # 830 # if the tasks have only files, set_file_constraints is required but set_precedence_constraints is not necessary 831 # 832 Task.set_file_constraints(tasks) 833 Task.set_precedence_constraints(tasks) 834 835 self.cur_tasks = tasks 836 if tasks: 837 yield tasks 838 839 while 1: 840 # the build stops once there are no tasks to process 841 yield [] 842 843 def install_files(self, dest, files, **kw): 844 """ 845 Creates a task generator to install files on the system:: 846 847 def build(bld): 848 bld.install_files('${DATADIR}', self.path.find_resource('wscript')) 849 850 :param dest: path representing the destination directory 851 :type dest: :py:class:`waflib.Node.Node` or string (absolute path) 852 :param files: input files 853 :type files: list of strings or list of :py:class:`waflib.Node.Node` 854 :param env: configuration set to expand *dest* 855 :type env: :py:class:`waflib.ConfigSet.ConfigSet` 856 :param relative_trick: preserve the folder hierarchy when installing whole folders 857 :type relative_trick: bool 858 :param cwd: parent node for searching srcfile, when srcfile is not an instance of :py:class:`waflib.Node.Node` 859 :type cwd: :py:class:`waflib.Node.Node` 860 :param postpone: execute the task immediately to perform the installation (False by default) 861 :type postpone: bool 862 """ 863 assert(dest) 864 tg = self(features='install_task', install_to=dest, install_from=files, **kw) 865 tg.dest = tg.install_to 866 tg.type = 'install_files' 867 if not kw.get('postpone', True): 868 tg.post() 869 return tg 870 871 def install_as(self, dest, srcfile, **kw): 872 """ 873 Creates a task generator to install a file on the system with a different name:: 874 875 def build(bld): 876 bld.install_as('${PREFIX}/bin', 'myapp', chmod=Utils.O755) 877 878 :param dest: destination file 879 :type dest: :py:class:`waflib.Node.Node` or string (absolute path) 880 :param srcfile: input file 881 :type srcfile: string or :py:class:`waflib.Node.Node` 882 :param cwd: parent node for searching srcfile, when srcfile is not an instance of :py:class:`waflib.Node.Node` 883 :type cwd: :py:class:`waflib.Node.Node` 884 :param env: configuration set for performing substitutions in dest 885 :type env: :py:class:`waflib.ConfigSet.ConfigSet` 886 :param postpone: execute the task immediately to perform the installation (False by default) 887 :type postpone: bool 888 """ 889 assert(dest) 890 tg = self(features='install_task', install_to=dest, install_from=srcfile, **kw) 891 tg.dest = tg.install_to 892 tg.type = 'install_as' 893 if not kw.get('postpone', True): 894 tg.post() 895 return tg 896 897 def symlink_as(self, dest, src, **kw): 898 """ 899 Creates a task generator to install a symlink:: 900 901 def build(bld): 902 bld.symlink_as('${PREFIX}/lib/libfoo.so', 'libfoo.so.1.2.3') 903 904 :param dest: absolute path of the symlink 905 :type dest: :py:class:`waflib.Node.Node` or string (absolute path) 906 :param src: link contents, which is a relative or absolute path which may exist or not 907 :type src: string 908 :param env: configuration set for performing substitutions in dest 909 :type env: :py:class:`waflib.ConfigSet.ConfigSet` 910 :param add: add the task created to a build group - set ``False`` only if the installation task is created after the build has started 911 :type add: bool 912 :param postpone: execute the task immediately to perform the installation 913 :type postpone: bool 914 :param relative_trick: make the symlink relative (default: ``False``) 915 :type relative_trick: bool 916 """ 917 assert(dest) 918 tg = self(features='install_task', install_to=dest, install_from=src, **kw) 919 tg.dest = tg.install_to 920 tg.type = 'symlink_as' 921 tg.link = src 922 # TODO if add: self.add_to_group(tsk) 923 if not kw.get('postpone', True): 924 tg.post() 925 return tg 926 927@TaskGen.feature('install_task') 928@TaskGen.before_method('process_rule', 'process_source') 929def process_install_task(self): 930 """Creates the installation task for the current task generator; uses :py:func:`waflib.Build.add_install_task` internally.""" 931 self.add_install_task(**self.__dict__) 932 933@TaskGen.taskgen_method 934def add_install_task(self, **kw): 935 """ 936 Creates the installation task for the current task generator, and executes it immediately if necessary 937 938 :returns: An installation task 939 :rtype: :py:class:`waflib.Build.inst` 940 """ 941 if not self.bld.is_install: 942 return 943 if not kw['install_to']: 944 return 945 946 if kw['type'] == 'symlink_as' and Utils.is_win32: 947 if kw.get('win32_install'): 948 kw['type'] = 'install_as' 949 else: 950 # just exit 951 return 952 953 tsk = self.install_task = self.create_task('inst') 954 tsk.chmod = kw.get('chmod', Utils.O644) 955 tsk.link = kw.get('link', '') or kw.get('install_from', '') 956 tsk.relative_trick = kw.get('relative_trick', False) 957 tsk.type = kw['type'] 958 tsk.install_to = tsk.dest = kw['install_to'] 959 tsk.install_from = kw['install_from'] 960 tsk.relative_base = kw.get('cwd') or kw.get('relative_base', self.path) 961 tsk.install_user = kw.get('install_user') 962 tsk.install_group = kw.get('install_group') 963 tsk.init_files() 964 if not kw.get('postpone', True): 965 tsk.run_now() 966 return tsk 967 968@TaskGen.taskgen_method 969def add_install_files(self, **kw): 970 """ 971 Creates an installation task for files 972 973 :returns: An installation task 974 :rtype: :py:class:`waflib.Build.inst` 975 """ 976 kw['type'] = 'install_files' 977 return self.add_install_task(**kw) 978 979@TaskGen.taskgen_method 980def add_install_as(self, **kw): 981 """ 982 Creates an installation task for a single file 983 984 :returns: An installation task 985 :rtype: :py:class:`waflib.Build.inst` 986 """ 987 kw['type'] = 'install_as' 988 return self.add_install_task(**kw) 989 990@TaskGen.taskgen_method 991def add_symlink_as(self, **kw): 992 """ 993 Creates an installation task for a symbolic link 994 995 :returns: An installation task 996 :rtype: :py:class:`waflib.Build.inst` 997 """ 998 kw['type'] = 'symlink_as' 999 return self.add_install_task(**kw) 1000 1001class inst(Task.Task): 1002 """Task that installs files or symlinks; it is typically executed by :py:class:`waflib.Build.InstallContext` and :py:class:`waflib.Build.UnInstallContext`""" 1003 def __str__(self): 1004 """Returns an empty string to disable the standard task display""" 1005 return '' 1006 1007 def uid(self): 1008 """Returns a unique identifier for the task""" 1009 lst = self.inputs + self.outputs + [self.link, self.generator.path.abspath()] 1010 return Utils.h_list(lst) 1011 1012 def init_files(self): 1013 """ 1014 Initializes the task input and output nodes 1015 """ 1016 if self.type == 'symlink_as': 1017 inputs = [] 1018 else: 1019 inputs = self.generator.to_nodes(self.install_from) 1020 if self.type == 'install_as': 1021 assert len(inputs) == 1 1022 self.set_inputs(inputs) 1023 1024 dest = self.get_install_path() 1025 outputs = [] 1026 if self.type == 'symlink_as': 1027 if self.relative_trick: 1028 self.link = os.path.relpath(self.link, os.path.dirname(dest)) 1029 outputs.append(self.generator.bld.root.make_node(dest)) 1030 elif self.type == 'install_as': 1031 outputs.append(self.generator.bld.root.make_node(dest)) 1032 else: 1033 for y in inputs: 1034 if self.relative_trick: 1035 destfile = os.path.join(dest, y.path_from(self.relative_base)) 1036 else: 1037 destfile = os.path.join(dest, y.name) 1038 outputs.append(self.generator.bld.root.make_node(destfile)) 1039 self.set_outputs(outputs) 1040 1041 def runnable_status(self): 1042 """ 1043 Installation tasks are always executed, so this method returns either :py:const:`waflib.Task.ASK_LATER` or :py:const:`waflib.Task.RUN_ME`. 1044 """ 1045 ret = super(inst, self).runnable_status() 1046 if ret == Task.SKIP_ME and self.generator.bld.is_install: 1047 return Task.RUN_ME 1048 return ret 1049 1050 def post_run(self): 1051 """ 1052 Disables any post-run operations 1053 """ 1054 pass 1055 1056 def get_install_path(self, destdir=True): 1057 """ 1058 Returns the destination path where files will be installed, pre-pending `destdir`. 1059 1060 Relative paths will be interpreted relative to `PREFIX` if no `destdir` is given. 1061 1062 :rtype: string 1063 """ 1064 if isinstance(self.install_to, Node.Node): 1065 dest = self.install_to.abspath() 1066 else: 1067 dest = os.path.normpath(Utils.subst_vars(self.install_to, self.env)) 1068 if not os.path.isabs(dest): 1069 dest = os.path.join(self.env.PREFIX, dest) 1070 if destdir and Options.options.destdir: 1071 dest = os.path.join(Options.options.destdir, os.path.splitdrive(dest)[1].lstrip(os.sep)) 1072 return dest 1073 1074 def copy_fun(self, src, tgt): 1075 """ 1076 Copies a file from src to tgt, preserving permissions and trying to work 1077 around path limitations on Windows platforms. On Unix-like platforms, 1078 the owner/group of the target file may be set through install_user/install_group 1079 1080 :param src: absolute path 1081 :type src: string 1082 :param tgt: absolute path 1083 :type tgt: string 1084 """ 1085 # override this if you want to strip executables 1086 # kw['tsk'].source is the task that created the files in the build 1087 if Utils.is_win32 and len(tgt) > 259 and not tgt.startswith('\\\\?\\'): 1088 tgt = '\\\\?\\' + tgt 1089 shutil.copy2(src, tgt) 1090 self.fix_perms(tgt) 1091 1092 def rm_empty_dirs(self, tgt): 1093 """ 1094 Removes empty folders recursively when uninstalling. 1095 1096 :param tgt: absolute path 1097 :type tgt: string 1098 """ 1099 while tgt: 1100 tgt = os.path.dirname(tgt) 1101 try: 1102 os.rmdir(tgt) 1103 except OSError: 1104 break 1105 1106 def run(self): 1107 """ 1108 Performs file or symlink installation 1109 """ 1110 is_install = self.generator.bld.is_install 1111 if not is_install: # unnecessary? 1112 return 1113 1114 for x in self.outputs: 1115 if is_install == INSTALL: 1116 x.parent.mkdir() 1117 if self.type == 'symlink_as': 1118 fun = is_install == INSTALL and self.do_link or self.do_unlink 1119 fun(self.link, self.outputs[0].abspath()) 1120 else: 1121 fun = is_install == INSTALL and self.do_install or self.do_uninstall 1122 launch_node = self.generator.bld.launch_node() 1123 for x, y in zip(self.inputs, self.outputs): 1124 fun(x.abspath(), y.abspath(), x.path_from(launch_node)) 1125 1126 def run_now(self): 1127 """ 1128 Try executing the installation task right now 1129 1130 :raises: :py:class:`waflib.Errors.TaskNotReady` 1131 """ 1132 status = self.runnable_status() 1133 if status not in (Task.RUN_ME, Task.SKIP_ME): 1134 raise Errors.TaskNotReady('Could not process %r: status %r' % (self, status)) 1135 self.run() 1136 self.hasrun = Task.SUCCESS 1137 1138 def do_install(self, src, tgt, lbl, **kw): 1139 """ 1140 Copies a file from src to tgt with given file permissions. The actual copy is only performed 1141 if the source and target file sizes or timestamps differ. When the copy occurs, 1142 the file is always first removed and then copied so as to prevent stale inodes. 1143 1144 :param src: file name as absolute path 1145 :type src: string 1146 :param tgt: file destination, as absolute path 1147 :type tgt: string 1148 :param lbl: file source description 1149 :type lbl: string 1150 :param chmod: installation mode 1151 :type chmod: int 1152 :raises: :py:class:`waflib.Errors.WafError` if the file cannot be written 1153 """ 1154 if not Options.options.force: 1155 # check if the file is already there to avoid a copy 1156 try: 1157 st1 = os.stat(tgt) 1158 st2 = os.stat(src) 1159 except OSError: 1160 pass 1161 else: 1162 # same size and identical timestamps -> make no copy 1163 if st1.st_mtime + 2 >= st2.st_mtime and st1.st_size == st2.st_size: 1164 if not self.generator.bld.progress_bar: 1165 1166 c1 = Logs.colors.NORMAL 1167 c2 = Logs.colors.BLUE 1168 1169 Logs.info('%s- install %s%s%s (from %s)', c1, c2, tgt, c1, lbl) 1170 return False 1171 1172 if not self.generator.bld.progress_bar: 1173 1174 c1 = Logs.colors.NORMAL 1175 c2 = Logs.colors.BLUE 1176 1177 Logs.info('%s+ install %s%s%s (from %s)', c1, c2, tgt, c1, lbl) 1178 1179 # Give best attempt at making destination overwritable, 1180 # like the 'install' utility used by 'make install' does. 1181 try: 1182 os.chmod(tgt, Utils.O644 | stat.S_IMODE(os.stat(tgt).st_mode)) 1183 except EnvironmentError: 1184 pass 1185 1186 # following is for shared libs and stale inodes (-_-) 1187 try: 1188 os.remove(tgt) 1189 except OSError: 1190 pass 1191 1192 try: 1193 self.copy_fun(src, tgt) 1194 except EnvironmentError as e: 1195 if not os.path.exists(src): 1196 Logs.error('File %r does not exist', src) 1197 elif not os.path.isfile(src): 1198 Logs.error('Input %r is not a file', src) 1199 raise Errors.WafError('Could not install the file %r' % tgt, e) 1200 1201 def fix_perms(self, tgt): 1202 """ 1203 Change the ownership of the file/folder/link pointed by the given path 1204 This looks up for `install_user` or `install_group` attributes 1205 on the task or on the task generator:: 1206 1207 def build(bld): 1208 bld.install_as('${PREFIX}/wscript', 1209 'wscript', 1210 install_user='nobody', install_group='nogroup') 1211 bld.symlink_as('${PREFIX}/wscript_link', 1212 Utils.subst_vars('${PREFIX}/wscript', bld.env), 1213 install_user='nobody', install_group='nogroup') 1214 """ 1215 if not Utils.is_win32: 1216 user = getattr(self, 'install_user', None) or getattr(self.generator, 'install_user', None) 1217 group = getattr(self, 'install_group', None) or getattr(self.generator, 'install_group', None) 1218 if user or group: 1219 Utils.lchown(tgt, user or -1, group or -1) 1220 if not os.path.islink(tgt): 1221 os.chmod(tgt, self.chmod) 1222 1223 def do_link(self, src, tgt, **kw): 1224 """ 1225 Creates a symlink from tgt to src. 1226 1227 :param src: file name as absolute path 1228 :type src: string 1229 :param tgt: file destination, as absolute path 1230 :type tgt: string 1231 """ 1232 if os.path.islink(tgt) and os.readlink(tgt) == src: 1233 if not self.generator.bld.progress_bar: 1234 c1 = Logs.colors.NORMAL 1235 c2 = Logs.colors.BLUE 1236 Logs.info('%s- symlink %s%s%s (to %s)', c1, c2, tgt, c1, src) 1237 else: 1238 try: 1239 os.remove(tgt) 1240 except OSError: 1241 pass 1242 if not self.generator.bld.progress_bar: 1243 c1 = Logs.colors.NORMAL 1244 c2 = Logs.colors.BLUE 1245 Logs.info('%s+ symlink %s%s%s (to %s)', c1, c2, tgt, c1, src) 1246 os.symlink(src, tgt) 1247 self.fix_perms(tgt) 1248 1249 def do_uninstall(self, src, tgt, lbl, **kw): 1250 """ 1251 See :py:meth:`waflib.Build.inst.do_install` 1252 """ 1253 if not self.generator.bld.progress_bar: 1254 c1 = Logs.colors.NORMAL 1255 c2 = Logs.colors.BLUE 1256 Logs.info('%s- remove %s%s%s', c1, c2, tgt, c1) 1257 1258 #self.uninstall.append(tgt) 1259 try: 1260 os.remove(tgt) 1261 except OSError as e: 1262 if e.errno != errno.ENOENT: 1263 if not getattr(self, 'uninstall_error', None): 1264 self.uninstall_error = True 1265 Logs.warn('build: some files could not be uninstalled (retry with -vv to list them)') 1266 if Logs.verbose > 1: 1267 Logs.warn('Could not remove %s (error code %r)', e.filename, e.errno) 1268 self.rm_empty_dirs(tgt) 1269 1270 def do_unlink(self, src, tgt, **kw): 1271 """ 1272 See :py:meth:`waflib.Build.inst.do_link` 1273 """ 1274 try: 1275 if not self.generator.bld.progress_bar: 1276 c1 = Logs.colors.NORMAL 1277 c2 = Logs.colors.BLUE 1278 Logs.info('%s- remove %s%s%s', c1, c2, tgt, c1) 1279 os.remove(tgt) 1280 except OSError: 1281 pass 1282 self.rm_empty_dirs(tgt) 1283 1284class InstallContext(BuildContext): 1285 '''installs the targets on the system''' 1286 cmd = 'install' 1287 1288 def __init__(self, **kw): 1289 super(InstallContext, self).__init__(**kw) 1290 self.is_install = INSTALL 1291 1292class UninstallContext(InstallContext): 1293 '''removes the targets installed''' 1294 cmd = 'uninstall' 1295 1296 def __init__(self, **kw): 1297 super(UninstallContext, self).__init__(**kw) 1298 self.is_install = UNINSTALL 1299 1300class CleanContext(BuildContext): 1301 '''cleans the project''' 1302 cmd = 'clean' 1303 def execute(self): 1304 """ 1305 See :py:func:`waflib.Build.BuildContext.execute`. 1306 """ 1307 self.restore() 1308 if not self.all_envs: 1309 self.load_envs() 1310 1311 self.recurse([self.run_dir]) 1312 try: 1313 self.clean() 1314 finally: 1315 self.store() 1316 1317 def clean(self): 1318 """ 1319 Remove most files from the build directory, and reset all caches. 1320 1321 Custom lists of files to clean can be declared as `bld.clean_files`. 1322 For example, exclude `build/program/myprogram` from getting removed:: 1323 1324 def build(bld): 1325 bld.clean_files = bld.bldnode.ant_glob('**', 1326 excl='.lock* config.log c4che/* config.h program/myprogram', 1327 quiet=True, generator=True) 1328 """ 1329 Logs.debug('build: clean called') 1330 1331 if hasattr(self, 'clean_files'): 1332 for n in self.clean_files: 1333 n.delete() 1334 elif self.bldnode != self.srcnode: 1335 # would lead to a disaster if top == out 1336 lst = [] 1337 for env in self.all_envs.values(): 1338 lst.extend(self.root.find_or_declare(f) for f in env[CFG_FILES]) 1339 excluded_dirs = '.lock* *conf_check_*/** config.log %s/*' % CACHE_DIR 1340 for n in self.bldnode.ant_glob('**/*', excl=excluded_dirs, quiet=True): 1341 if n in lst: 1342 continue 1343 n.delete() 1344 self.root.children = {} 1345 1346 for v in SAVED_ATTRS: 1347 if v == 'root': 1348 continue 1349 setattr(self, v, {}) 1350 1351class ListContext(BuildContext): 1352 '''lists the targets to execute''' 1353 cmd = 'list' 1354 1355 def execute(self): 1356 """ 1357 In addition to printing the name of each build target, 1358 a description column will include text for each task 1359 generator which has a "description" field set. 1360 1361 See :py:func:`waflib.Build.BuildContext.execute`. 1362 """ 1363 self.restore() 1364 if not self.all_envs: 1365 self.load_envs() 1366 1367 self.recurse([self.run_dir]) 1368 self.pre_build() 1369 1370 # display the time elapsed in the progress bar 1371 self.timer = Utils.Timer() 1372 1373 for g in self.groups: 1374 for tg in g: 1375 try: 1376 f = tg.post 1377 except AttributeError: 1378 pass 1379 else: 1380 f() 1381 1382 try: 1383 # force the cache initialization 1384 self.get_tgen_by_name('') 1385 except Errors.WafError: 1386 pass 1387 1388 targets = sorted(self.task_gen_cache_names) 1389 1390 # figure out how much to left-justify, for largest target name 1391 line_just = max(len(t) for t in targets) if targets else 0 1392 1393 for target in targets: 1394 tgen = self.task_gen_cache_names[target] 1395 1396 # Support displaying the description for the target 1397 # if it was set on the tgen 1398 descript = getattr(tgen, 'description', '') 1399 if descript: 1400 target = target.ljust(line_just) 1401 descript = ': %s' % descript 1402 1403 Logs.pprint('GREEN', target, label=descript) 1404 1405class StepContext(BuildContext): 1406 '''executes tasks in a step-by-step fashion, for debugging''' 1407 cmd = 'step' 1408 1409 def __init__(self, **kw): 1410 super(StepContext, self).__init__(**kw) 1411 self.files = Options.options.files 1412 1413 def compile(self): 1414 """ 1415 Overrides :py:meth:`waflib.Build.BuildContext.compile` to perform a partial build 1416 on tasks matching the input/output pattern given (regular expression matching):: 1417 1418 $ waf step --files=foo.c,bar.c,in:truc.c,out:bar.o 1419 $ waf step --files=in:foo.cpp.1.o # link task only 1420 1421 """ 1422 if not self.files: 1423 Logs.warn('Add a pattern for the debug build, for example "waf step --files=main.c,app"') 1424 BuildContext.compile(self) 1425 return 1426 1427 targets = [] 1428 if self.targets and self.targets != '*': 1429 targets = self.targets.split(',') 1430 1431 for g in self.groups: 1432 for tg in g: 1433 if targets and tg.name not in targets: 1434 continue 1435 1436 try: 1437 f = tg.post 1438 except AttributeError: 1439 pass 1440 else: 1441 f() 1442 1443 for pat in self.files.split(','): 1444 matcher = self.get_matcher(pat) 1445 for tg in g: 1446 if isinstance(tg, Task.Task): 1447 lst = [tg] 1448 else: 1449 lst = tg.tasks 1450 for tsk in lst: 1451 do_exec = False 1452 for node in tsk.inputs: 1453 if matcher(node, output=False): 1454 do_exec = True 1455 break 1456 for node in tsk.outputs: 1457 if matcher(node, output=True): 1458 do_exec = True 1459 break 1460 if do_exec: 1461 ret = tsk.run() 1462 Logs.info('%s -> exit %r', tsk, ret) 1463 1464 def get_matcher(self, pat): 1465 """ 1466 Converts a step pattern into a function 1467 1468 :param: pat: pattern of the form in:truc.c,out:bar.o 1469 :returns: Python function that uses Node objects as inputs and returns matches 1470 :rtype: function 1471 """ 1472 # this returns a function 1473 inn = True 1474 out = True 1475 if pat.startswith('in:'): 1476 out = False 1477 pat = pat.replace('in:', '') 1478 elif pat.startswith('out:'): 1479 inn = False 1480 pat = pat.replace('out:', '') 1481 1482 anode = self.root.find_node(pat) 1483 pattern = None 1484 if not anode: 1485 if not pat.startswith('^'): 1486 pat = '^.+?%s' % pat 1487 if not pat.endswith('$'): 1488 pat = '%s$' % pat 1489 pattern = re.compile(pat) 1490 1491 def match(node, output): 1492 if output and not out: 1493 return False 1494 if not output and not inn: 1495 return False 1496 1497 if anode: 1498 return anode == node 1499 else: 1500 return pattern.match(node.abspath()) 1501 return match 1502 1503class EnvContext(BuildContext): 1504 """Subclass EnvContext to create commands that require configuration data in 'env'""" 1505 fun = cmd = None 1506 def execute(self): 1507 """ 1508 See :py:func:`waflib.Build.BuildContext.execute`. 1509 """ 1510 self.restore() 1511 if not self.all_envs: 1512 self.load_envs() 1513 self.recurse([self.run_dir]) 1514 1515