1 # Copyright (c) 2014 Google Inc. All rights reserved.
2 # Use of this source code is governed by a BSD-style license that can be
3 # found in the LICENSE file.
6 This script is intended for use as a GYP_GENERATOR. It takes as input (by way of
7 the generator flag config_path) the path of a json file that dictates the files
8 and targets to search for. The following keys are supported:
9 files: list of paths (relative) of the files to search for.
10 targets: list of targets to search for. The target names are unqualified.
12 The following is output:
13 error: only supplied if there is an error.
14 targets: the set of targets passed in via targets that either directly or
15 indirectly depend upon the set of paths supplied in files.
16 build_targets: minimal set of targets that directly depend on the changed
17 files and need to be built. The expectation is this set of targets is passed
19 status: outputs one of three values: none of the supplied files were found,
20 one of the include files changed so that it should be assumed everything
21 changed (in this case targets and build_targets are not output) or at
22 least one file was found.
23 invalid_targets: list of supplied targets thare were not found.
25 If the generator flag analyzer_output_path is specified, output is written
26 there. Otherwise output is written to stdout.
30 import gyp.ninja_syntax as ninja_syntax
38 found_dependency_string = 'Found dependency'
39 no_dependency_string = 'No dependencies'
40 # Status when it should be assumed that everything has changed.
41 all_changed_string = 'Found dependency (all)'
43 # MatchStatus is used indicate if and how a target depends upon the supplied
45 # The target's sources contain one of the supplied paths.
46 MATCH_STATUS_MATCHES = 1
47 # The target has a dependency on another target that contains one of the
49 MATCH_STATUS_MATCHES_BY_DEPENDENCY = 2
50 # The target's sources weren't in the supplied paths and none of the target's
51 # dependencies depend upon a target that matched.
52 MATCH_STATUS_DOESNT_MATCH = 3
53 # The target doesn't contain the source, but the dependent targets have not yet
54 # been visited to determine a more specific status yet.
57 generator_supports_multiple_toolsets = True
59 generator_wants_static_library_dependencies_adjusted = False
61 generator_default_variables = {
63 for dirname in ['INTERMEDIATE_DIR', 'SHARED_INTERMEDIATE_DIR', 'PRODUCT_DIR',
64 'LIB_DIR', 'SHARED_LIB_DIR']:
65 generator_default_variables[dirname] = '!!!'
67 for unused in ['RULE_INPUT_PATH', 'RULE_INPUT_ROOT', 'RULE_INPUT_NAME',
68 'RULE_INPUT_DIRNAME', 'RULE_INPUT_EXT',
69 'EXECUTABLE_PREFIX', 'EXECUTABLE_SUFFIX',
70 'STATIC_LIB_PREFIX', 'STATIC_LIB_SUFFIX',
71 'SHARED_LIB_PREFIX', 'SHARED_LIB_SUFFIX',
72 'CONFIGURATION_NAME']:
73 generator_default_variables[unused] = ''
77 """Converts a path to the format used by gyp."""
78 if os.sep == '\\' and os.altsep == '/':
79 return path.replace('\\', '/')
83 def _ResolveParent(path, base_path_components):
84 """Resolves |path|, which starts with at least one '../'. Returns an empty
85 string if the path shouldn't be considered. See _AddSources() for a
86 description of |base_path_components|."""
88 while path.startswith('../'):
91 # Relative includes may go outside the source tree. For example, an action may
92 # have inputs in /usr/include, which are not in the source tree.
93 if depth > len(base_path_components):
95 if depth == len(base_path_components):
97 return '/'.join(base_path_components[0:len(base_path_components) - depth]) + \
101 def _AddSources(sources, base_path, base_path_components, result):
102 """Extracts valid sources from |sources| and adds them to |result|. Each
103 source file is relative to |base_path|, but may contain '..'. To make
104 resolving '..' easier |base_path_components| contains each of the
105 directories in |base_path|. Additionally each source may contain variables.
106 Such sources are ignored as it is assumed dependencies on them are expressed
107 and tracked in some other means."""
108 # NOTE: gyp paths are always posix style.
109 for source in sources:
110 if not len(source) or source.startswith('!!!') or source.startswith('$'):
112 # variable expansion may lead to //.
114 source = source[0] + source[1:].replace('//', '/')
115 if source.startswith('../'):
116 source = _ResolveParent(source, base_path_components)
118 result.append(source)
120 result.append(base_path + source)
122 print 'AddSource', org_source, result[len(result) - 1]
125 def _ExtractSourcesFromAction(action, base_path, base_path_components,
127 if 'inputs' in action:
128 _AddSources(action['inputs'], base_path, base_path_components, results)
131 def _ToLocalPath(toplevel_dir, path):
132 """Converts |path| to a path relative to |toplevel_dir|."""
133 if path == toplevel_dir:
135 if path.startswith(toplevel_dir + '/'):
136 return path[len(toplevel_dir) + len('/'):]
140 def _ExtractSources(target, target_dict, toplevel_dir):
141 # |target| is either absolute or relative and in the format of the OS. Gyp
142 # source paths are always posix. Convert |target| to a posix path relative to
143 # |toplevel_dir_|. This is done to make it easy to build source paths.
144 base_path = posixpath.dirname(_ToLocalPath(toplevel_dir, _ToGypPath(target)))
145 base_path_components = base_path.split('/')
147 # Add a trailing '/' so that _AddSources() can easily build paths.
152 print 'ExtractSources', target, base_path
155 if 'sources' in target_dict:
156 _AddSources(target_dict['sources'], base_path, base_path_components,
158 # Include the inputs from any actions. Any changes to these affect the
160 if 'actions' in target_dict:
161 for action in target_dict['actions']:
162 _ExtractSourcesFromAction(action, base_path, base_path_components,
164 if 'rules' in target_dict:
165 for rule in target_dict['rules']:
166 _ExtractSourcesFromAction(rule, base_path, base_path_components, results)
171 class Target(object):
172 """Holds information about a particular target:
173 deps: set of Targets this Target depends upon. This is not recursive, only the
174 direct dependent Targets.
175 match_status: one of the MatchStatus values.
176 back_deps: set of Targets that have a dependency on this Target.
177 visited: used during iteration to indicate whether we've visited this target.
178 This is used for two iterations, once in building the set of Targets and
179 again in _GetBuildTargets().
180 name: fully qualified name of the target.
181 requires_build: True if the target type is such that it needs to be built.
182 See _DoesTargetTypeRequireBuild for details.
183 added_to_compile_targets: used when determining if the target was added to the
184 set of targets that needs to be built.
185 in_roots: true if this target is a descendant of one of the root nodes.
186 is_executable: true if the type of target is executable."""
187 def __init__(self, name):
189 self.match_status = MATCH_STATUS_TBD
190 self.back_deps = set()
192 # TODO(sky): I don't like hanging this off Target. This state is specific
193 # to certain functions and should be isolated there.
195 self.requires_build = False
196 self.added_to_compile_targets = False
197 self.in_roots = False
198 self.is_executable = False
201 class Config(object):
202 """Details what we're looking for
203 files: set of files to search for
204 targets: see file description for details."""
209 def Init(self, params):
210 """Initializes Config. This is a separate method as it raises an exception
211 if there is a parse error."""
212 generator_flags = params.get('generator_flags', {})
213 config_path = generator_flags.get('config_path', None)
217 f = open(config_path, 'r')
218 config = json.load(f)
221 raise Exception('Unable to open file ' + config_path)
222 except ValueError as e:
223 raise Exception('Unable to parse config file ' + config_path + str(e))
224 if not isinstance(config, dict):
225 raise Exception('config_path must be a JSON file containing a dictionary')
226 self.files = config.get('files', [])
227 self.targets = set(config.get('targets', []))
230 def _WasBuildFileModified(build_file, data, files, toplevel_dir):
231 """Returns true if the build file |build_file| is either in |files| or
232 one of the files included by |build_file| is in |files|. |toplevel_dir| is
233 the root of the source tree."""
234 if _ToLocalPath(toplevel_dir, _ToGypPath(build_file)) in files:
236 print 'gyp file modified', build_file
239 # First element of included_files is the file itself.
240 if len(data[build_file]['included_files']) <= 1:
243 for include_file in data[build_file]['included_files'][1:]:
244 # |included_files| are relative to the directory of the |build_file|.
246 _ToGypPath(gyp.common.UnrelativePath(include_file, build_file))
247 if _ToLocalPath(toplevel_dir, rel_include_file) in files:
249 print 'included gyp file modified, gyp_file=', build_file, \
250 'included file=', rel_include_file
255 def _GetOrCreateTargetByName(targets, target_name):
256 """Creates or returns the Target at targets[target_name]. If there is no
257 Target for |target_name| one is created. Returns a tuple of whether a new
258 Target was created and the Target."""
259 if target_name in targets:
260 return False, targets[target_name]
261 target = Target(target_name)
262 targets[target_name] = target
266 def _DoesTargetTypeRequireBuild(target_dict):
267 """Returns true if the target type is such that it needs to be built."""
268 # If a 'none' target has rules or actions we assume it requires a build.
269 return target_dict['type'] != 'none' or \
270 target_dict.get('actions') or target_dict.get('rules')
273 def _GenerateTargets(data, target_list, target_dicts, toplevel_dir, files,
275 """Returns a tuple of the following:
276 . A dictionary mapping from fully qualified name to Target.
277 . A list of the targets that have a source file in |files|.
278 . Set of root Targets reachable from the the files |build_files|.
279 This sets the |match_status| of the targets that contain any of the source
280 files in |files| to MATCH_STATUS_MATCHES.
281 |toplevel_dir| is the root of the source tree."""
282 # Maps from target name to Target.
285 # Targets that matched.
286 matching_targets = []
288 # Queue of targets to visit.
289 targets_to_visit = target_list[:]
291 # Maps from build file to a boolean indicating whether the build file is in
293 build_file_in_files = {}
295 # Root targets across all files.
298 # Set of Targets in |build_files|.
299 build_file_targets = set()
301 while len(targets_to_visit) > 0:
302 target_name = targets_to_visit.pop()
303 created_target, target = _GetOrCreateTargetByName(targets, target_name)
309 target.visited = True
310 target.requires_build = _DoesTargetTypeRequireBuild(
311 target_dicts[target_name])
312 target.is_executable = target_dicts[target_name]['type'] == 'executable'
314 build_file = gyp.common.ParseQualifiedTarget(target_name)[0]
315 if not build_file in build_file_in_files:
316 build_file_in_files[build_file] = \
317 _WasBuildFileModified(build_file, data, files, toplevel_dir)
319 if build_file in build_files:
320 build_file_targets.add(target)
322 # If a build file (or any of its included files) is modified we assume all
323 # targets in the file are modified.
324 if build_file_in_files[build_file]:
325 print 'matching target from modified build file', target_name
326 target.match_status = MATCH_STATUS_MATCHES
327 matching_targets.append(target)
329 sources = _ExtractSources(target_name, target_dicts[target_name],
331 for source in sources:
333 print 'target', target_name, 'matches', source
334 target.match_status = MATCH_STATUS_MATCHES
335 matching_targets.append(target)
338 # Add dependencies to visit as well as updating back pointers for deps.
339 for dep in target_dicts[target_name].get('dependencies', []):
340 targets_to_visit.append(dep)
342 created_dep_target, dep_target = _GetOrCreateTargetByName(targets, dep)
343 if not created_dep_target:
344 roots.discard(dep_target)
346 target.deps.add(dep_target)
347 dep_target.back_deps.add(target)
349 return targets, matching_targets, roots & build_file_targets
352 def _GetUnqualifiedToTargetMapping(all_targets, to_find):
353 """Returns a mapping (dictionary) from unqualified name to Target for all the
354 Targets in |to_find|."""
358 to_find = set(to_find)
359 for target_name in all_targets.keys():
360 extracted = gyp.common.ParseQualifiedTarget(target_name)
361 if len(extracted) > 1 and extracted[1] in to_find:
362 to_find.remove(extracted[1])
363 result[extracted[1]] = all_targets[target_name]
369 def _DoesTargetDependOn(target):
370 """Returns true if |target| or any of its dependencies matches the supplied
371 set of paths. This updates |matches| of the Targets as it recurses.
372 target: the Target to look for."""
373 if target.match_status == MATCH_STATUS_DOESNT_MATCH:
375 if target.match_status == MATCH_STATUS_MATCHES or \
376 target.match_status == MATCH_STATUS_MATCHES_BY_DEPENDENCY:
378 for dep in target.deps:
379 if _DoesTargetDependOn(dep):
380 target.match_status = MATCH_STATUS_MATCHES_BY_DEPENDENCY
382 target.match_status = MATCH_STATUS_DOESNT_MATCH
386 def _GetTargetsDependingOn(possible_targets):
387 """Returns the list of Targets in |possible_targets| that depend (either
388 directly on indirectly) on the matched targets.
389 possible_targets: targets to search from."""
391 for target in possible_targets:
392 if _DoesTargetDependOn(target):
397 def _AddBuildTargets(target, roots, add_if_no_ancestor, result):
398 """Recurses through all targets that depend on |target|, adding all targets
399 that need to be built (and are in |roots|) to |result|.
400 roots: set of root targets.
401 add_if_no_ancestor: If true and there are no ancestors of |target| then add
402 |target| to |result|. |target| must still be in |roots|.
403 result: targets that need to be built are added here."""
407 target.visited = True
408 target.in_roots = not target.back_deps and target in roots
410 for back_dep_target in target.back_deps:
411 _AddBuildTargets(back_dep_target, roots, False, result)
412 target.added_to_compile_targets |= back_dep_target.added_to_compile_targets
413 target.in_roots |= back_dep_target.in_roots
415 # Always add 'executable' targets. Even though they may be built by other
416 # targets that depend upon them it makes detection of what is going to be
418 if target.in_roots and \
419 (target.is_executable or
420 (not target.added_to_compile_targets and
421 (add_if_no_ancestor or target.requires_build))):
423 target.added_to_compile_targets = True
426 def _GetBuildTargets(matching_targets, roots):
427 """Returns the set of Targets that require a build.
428 matching_targets: targets that changed and need to be built.
429 roots: set of root targets in the build files to search from."""
431 for target in matching_targets:
432 _AddBuildTargets(target, roots, True, result)
436 def _WriteOutput(params, **values):
437 """Writes the output, either to stdout or a file is specified."""
438 if 'error' in values:
439 print 'Error:', values['error']
440 if 'status' in values:
441 print values['status']
442 if 'targets' in values:
443 values['targets'].sort()
444 print 'Supplied targets that depend on changed files:'
445 for target in values['targets']:
447 if 'invalid_targets' in values:
448 values['invalid_targets'].sort()
449 print 'The following targets were not found:'
450 for target in values['invalid_targets']:
452 if 'build_targets' in values:
453 values['build_targets'].sort()
454 print 'Targets that require a build:'
455 for target in values['build_targets']:
458 output_path = params.get('generator_flags', {}).get(
459 'analyzer_output_path', None)
461 print json.dumps(values)
464 f = open(output_path, 'w')
465 f.write(json.dumps(values) + '\n')
468 print 'Error writing to output file', output_path, str(e)
471 def _WasGypIncludeFileModified(params, files):
472 """Returns true if one of the files in |files| is in the set of included
474 if params['options'].includes:
475 for include in params['options'].includes:
476 if _ToGypPath(include) in files:
477 print 'Include file modified, assuming all changed', include
482 def _NamesNotIn(names, mapping):
483 """Returns a list of the values in |names| that are not in |mapping|."""
484 return [name for name in names if name not in mapping]
487 def _LookupTargets(names, mapping):
488 """Returns a list of the mapping[name] for each value in |names| that is in
490 return [mapping[name] for name in names if name in mapping]
493 def CalculateVariables(default_variables, params):
494 """Calculate additional variables for use in the build (called by gyp)."""
495 flavor = gyp.common.GetFlavor(params)
497 default_variables.setdefault('OS', 'mac')
498 elif flavor == 'win':
499 default_variables.setdefault('OS', 'win')
500 # Copy additional generator configuration data from VS, which is shared
501 # by the Windows Ninja generator.
502 import gyp.generator.msvs as msvs_generator
503 generator_additional_non_configuration_keys = getattr(msvs_generator,
504 'generator_additional_non_configuration_keys', [])
505 generator_additional_path_sections = getattr(msvs_generator,
506 'generator_additional_path_sections', [])
508 gyp.msvs_emulation.CalculateCommonVariables(default_variables, params)
510 operating_system = flavor
511 if flavor == 'android':
512 operating_system = 'linux' # Keep this legacy behavior for now.
513 default_variables.setdefault('OS', operating_system)
516 def GenerateOutput(target_list, target_dicts, data, params):
517 """Called by gyp as the final stage. Outputs results."""
522 raise Exception('Must specify files to analyze via config_path generator '
525 toplevel_dir = _ToGypPath(os.path.abspath(params['options'].toplevel_dir))
527 print 'toplevel_dir', toplevel_dir
529 if _WasGypIncludeFileModified(params, config.files):
530 result_dict = { 'status': all_changed_string,
531 'targets': list(config.targets) }
532 _WriteOutput(params, **result_dict)
535 all_targets, matching_targets, roots = _GenerateTargets(
536 data, target_list, target_dicts, toplevel_dir, frozenset(config.files),
537 params['build_files'])
539 unqualified_mapping = _GetUnqualifiedToTargetMapping(all_targets,
541 invalid_targets = None
542 if len(unqualified_mapping) != len(config.targets):
543 invalid_targets = _NamesNotIn(config.targets, unqualified_mapping)
546 search_targets = _LookupTargets(config.targets, unqualified_mapping)
547 matched_search_targets = _GetTargetsDependingOn(search_targets)
548 # Reset the visited status for _GetBuildTargets.
549 for target in all_targets.itervalues():
550 target.visited = False
551 build_targets = _GetBuildTargets(matching_targets, roots)
552 matched_search_targets = [gyp.common.ParseQualifiedTarget(target.name)[1]
553 for target in matched_search_targets]
554 build_targets = [gyp.common.ParseQualifiedTarget(target.name)[1]
555 for target in build_targets]
557 matched_search_targets = []
560 result_dict = { 'targets': matched_search_targets,
561 'status': found_dependency_string if matching_targets else
562 no_dependency_string,
563 'build_targets': build_targets}
565 result_dict['invalid_targets'] = invalid_targets
566 _WriteOutput(params, **result_dict)
568 except Exception as e:
569 _WriteOutput(params, error=str(e))