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Diffstat (limited to 'scripts/lib/checklayer/__init__.py')
| -rw-r--r-- | scripts/lib/checklayer/__init__.py | 392 |
1 files changed, 392 insertions, 0 deletions
diff --git a/scripts/lib/checklayer/__init__.py b/scripts/lib/checklayer/__init__.py new file mode 100644 index 0000000000..6c2b86a79a --- /dev/null +++ b/scripts/lib/checklayer/__init__.py @@ -0,0 +1,392 @@ +# Yocto Project layer check tool +# +# Copyright (C) 2017 Intel Corporation +# Released under the MIT license (see COPYING.MIT) + +import os +import re +import subprocess +from enum import Enum + +import bb.tinfoil + +class LayerType(Enum): + BSP = 0 + DISTRO = 1 + SOFTWARE = 2 + ERROR_NO_LAYER_CONF = 98 + ERROR_BSP_DISTRO = 99 + +def _get_configurations(path): + configs = [] + + for f in os.listdir(path): + file_path = os.path.join(path, f) + if os.path.isfile(file_path) and f.endswith('.conf'): + configs.append(f[:-5]) # strip .conf + return configs + +def _get_layer_collections(layer_path, lconf=None, data=None): + import bb.parse + import bb.data + + if lconf is None: + lconf = os.path.join(layer_path, 'conf', 'layer.conf') + + if data is None: + ldata = bb.data.init() + bb.parse.init_parser(ldata) + else: + ldata = data.createCopy() + + ldata.setVar('LAYERDIR', layer_path) + try: + ldata = bb.parse.handle(lconf, ldata, include=True) + except BaseException as exc: + raise LayerError(exc) + ldata.expandVarref('LAYERDIR') + + collections = (ldata.getVar('BBFILE_COLLECTIONS', True) or '').split() + if not collections: + name = os.path.basename(layer_path) + collections = [name] + + collections = {c: {} for c in collections} + for name in collections: + priority = ldata.getVar('BBFILE_PRIORITY_%s' % name, True) + pattern = ldata.getVar('BBFILE_PATTERN_%s' % name, True) + depends = ldata.getVar('LAYERDEPENDS_%s' % name, True) + collections[name]['priority'] = priority + collections[name]['pattern'] = pattern + collections[name]['depends'] = depends + + return collections + +def _detect_layer(layer_path): + """ + Scans layer directory to detect what type of layer + is BSP, Distro or Software. + + Returns a dictionary with layer name, type and path. + """ + + layer = {} + layer_name = os.path.basename(layer_path) + + layer['name'] = layer_name + layer['path'] = layer_path + layer['conf'] = {} + + if not os.path.isfile(os.path.join(layer_path, 'conf', 'layer.conf')): + layer['type'] = LayerType.ERROR_NO_LAYER_CONF + return layer + + machine_conf = os.path.join(layer_path, 'conf', 'machine') + distro_conf = os.path.join(layer_path, 'conf', 'distro') + + is_bsp = False + is_distro = False + + if os.path.isdir(machine_conf): + machines = _get_configurations(machine_conf) + if machines: + is_bsp = True + + if os.path.isdir(distro_conf): + distros = _get_configurations(distro_conf) + if distros: + is_distro = True + + if is_bsp and is_distro: + layer['type'] = LayerType.ERROR_BSP_DISTRO + elif is_bsp: + layer['type'] = LayerType.BSP + layer['conf']['machines'] = machines + elif is_distro: + layer['type'] = LayerType.DISTRO + layer['conf']['distros'] = distros + else: + layer['type'] = LayerType.SOFTWARE + + layer['collections'] = _get_layer_collections(layer['path']) + + return layer + +def detect_layers(layer_directories, no_auto): + layers = [] + + for directory in layer_directories: + directory = os.path.realpath(directory) + if directory[-1] == '/': + directory = directory[0:-1] + + if no_auto: + conf_dir = os.path.join(directory, 'conf') + if os.path.isdir(conf_dir): + layer = _detect_layer(directory) + if layer: + layers.append(layer) + else: + for root, dirs, files in os.walk(directory): + dir_name = os.path.basename(root) + conf_dir = os.path.join(root, 'conf') + if os.path.isdir(conf_dir): + layer = _detect_layer(root) + if layer: + layers.append(layer) + + return layers + +def _find_layer_depends(depend, layers): + for layer in layers: + for collection in layer['collections']: + if depend == collection: + return layer + return None + +def add_layer_dependencies(bblayersconf, layer, layers, logger): + def recurse_dependencies(depends, layer, layers, logger, ret = []): + logger.debug('Processing dependencies %s for layer %s.' % \ + (depends, layer['name'])) + + for depend in depends.split(): + # core (oe-core) is suppose to be provided + if depend == 'core': + continue + + layer_depend = _find_layer_depends(depend, layers) + if not layer_depend: + logger.error('Layer %s depends on %s and isn\'t found.' % \ + (layer['name'], depend)) + ret = None + continue + + # We keep processing, even if ret is None, this allows us to report + # multiple errors at once + if ret is not None and layer_depend not in ret: + ret.append(layer_depend) + + # Recursively process... + if 'collections' not in layer_depend: + continue + + for collection in layer_depend['collections']: + collect_deps = layer_depend['collections'][collection]['depends'] + if not collect_deps: + continue + ret = recurse_dependencies(collect_deps, layer_depend, layers, logger, ret) + + return ret + + layer_depends = [] + for collection in layer['collections']: + depends = layer['collections'][collection]['depends'] + if not depends: + continue + + layer_depends = recurse_dependencies(depends, layer, layers, logger, layer_depends) + + # Note: [] (empty) is allowed, None is not! + if layer_depends is None: + return False + else: + # Don't add a layer that is already present. + added = set() + output = check_command('Getting existing layers failed.', 'bitbake-layers show-layers').decode('utf-8') + for layer, path, pri in re.findall(r'^(\S+) +([^\n]*?) +(\d+)$', output, re.MULTILINE): + added.add(path) + + for layer_depend in layer_depends: + name = layer_depend['name'] + path = layer_depend['path'] + if path in added: + continue + else: + added.add(path) + logger.info('Adding layer dependency %s' % name) + with open(bblayersconf, 'a+') as f: + f.write("\nBBLAYERS += \"%s\"\n" % path) + return True + +def add_layer(bblayersconf, layer, layers, logger): + logger.info('Adding layer %s' % layer['name']) + with open(bblayersconf, 'a+') as f: + f.write("\nBBLAYERS += \"%s\"\n" % layer['path']) + + return True + +def check_command(error_msg, cmd): + ''' + Run a command under a shell, capture stdout and stderr in a single stream, + throw an error when command returns non-zero exit code. Returns the output. + ''' + + p = subprocess.Popen(cmd, shell=True, stdout=subprocess.PIPE, stderr=subprocess.STDOUT) + output, _ = p.communicate() + if p.returncode: + msg = "%s\nCommand: %s\nOutput:\n%s" % (error_msg, cmd, output.decode('utf-8')) + raise RuntimeError(msg) + return output + +def get_signatures(builddir, failsafe=False, machine=None): + import re + + # some recipes needs to be excluded like meta-world-pkgdata + # because a layer can add recipes to a world build so signature + # will be change + exclude_recipes = ('meta-world-pkgdata',) + + sigs = {} + tune2tasks = {} + + cmd = '' + if machine: + cmd += 'MACHINE=%s ' % machine + cmd += 'bitbake ' + if failsafe: + cmd += '-k ' + cmd += '-S none world' + sigs_file = os.path.join(builddir, 'locked-sigs.inc') + if os.path.exists(sigs_file): + os.unlink(sigs_file) + try: + check_command('Generating signatures failed. This might be due to some parse error and/or general layer incompatibilities.', + cmd) + except RuntimeError as ex: + if failsafe and os.path.exists(sigs_file): + # Ignore the error here. Most likely some recipes active + # in a world build lack some dependencies. There is a + # separate test_machine_world_build which exposes the + # failure. + pass + else: + raise + + sig_regex = re.compile("^(?P<task>.*:.*):(?P<hash>.*) .$") + tune_regex = re.compile("(^|\s)SIGGEN_LOCKEDSIGS_t-(?P<tune>\S*)\s*=\s*") + current_tune = None + with open(sigs_file, 'r') as f: + for line in f.readlines(): + line = line.strip() + t = tune_regex.search(line) + if t: + current_tune = t.group('tune') + s = sig_regex.match(line) + if s: + exclude = False + for er in exclude_recipes: + (recipe, task) = s.group('task').split(':') + if er == recipe: + exclude = True + break + if exclude: + continue + + sigs[s.group('task')] = s.group('hash') + tune2tasks.setdefault(current_tune, []).append(s.group('task')) + + if not sigs: + raise RuntimeError('Can\'t load signatures from %s' % sigs_file) + + return (sigs, tune2tasks) + +def get_depgraph(targets=['world'], failsafe=False): + ''' + Returns the dependency graph for the given target(s). + The dependency graph is taken directly from DepTreeEvent. + ''' + depgraph = None + with bb.tinfoil.Tinfoil() as tinfoil: + tinfoil.prepare(config_only=False) + tinfoil.set_event_mask(['bb.event.NoProvider', 'bb.event.DepTreeGenerated', 'bb.command.CommandCompleted']) + if not tinfoil.run_command('generateDepTreeEvent', targets, 'do_build'): + raise RuntimeError('starting generateDepTreeEvent failed') + while True: + event = tinfoil.wait_event(timeout=1000) + if event: + if isinstance(event, bb.command.CommandFailed): + raise RuntimeError('Generating dependency information failed: %s' % event.error) + elif isinstance(event, bb.command.CommandCompleted): + break + elif isinstance(event, bb.event.NoProvider): + if failsafe: + # The event is informational, we will get information about the + # remaining dependencies eventually and thus can ignore this + # here like we do in get_signatures(), if desired. + continue + if event._reasons: + raise RuntimeError('Nothing provides %s: %s' % (event._item, event._reasons)) + else: + raise RuntimeError('Nothing provides %s.' % (event._item)) + elif isinstance(event, bb.event.DepTreeGenerated): + depgraph = event._depgraph + + if depgraph is None: + raise RuntimeError('Could not retrieve the depgraph.') + return depgraph + +def compare_signatures(old_sigs, curr_sigs): + ''' + Compares the result of two get_signatures() calls. Returns None if no + problems found, otherwise a string that can be used as additional + explanation in self.fail(). + ''' + # task -> (old signature, new signature) + sig_diff = {} + for task in old_sigs: + if task in curr_sigs and \ + old_sigs[task] != curr_sigs[task]: + sig_diff[task] = (old_sigs[task], curr_sigs[task]) + + if not sig_diff: + return None + + # Beware, depgraph uses task=<pn>.<taskname> whereas get_signatures() + # uses <pn>:<taskname>. Need to convert sometimes. The output follows + # the convention from get_signatures() because that seems closer to + # normal bitbake output. + def sig2graph(task): + pn, taskname = task.rsplit(':', 1) + return pn + '.' + taskname + def graph2sig(task): + pn, taskname = task.rsplit('.', 1) + return pn + ':' + taskname + depgraph = get_depgraph(failsafe=True) + depends = depgraph['tdepends'] + + # If a task A has a changed signature, but none of its + # dependencies, then we need to report it because it is + # the one which introduces a change. Any task depending on + # A (directly or indirectly) will also have a changed + # signature, but we don't need to report it. It might have + # its own changes, which will become apparent once the + # issues that we do report are fixed and the test gets run + # again. + sig_diff_filtered = [] + for task, (old_sig, new_sig) in sig_diff.items(): + deps_tainted = False + for dep in depends.get(sig2graph(task), ()): + if graph2sig(dep) in sig_diff: + deps_tainted = True + break + if not deps_tainted: + sig_diff_filtered.append((task, old_sig, new_sig)) + + msg = [] + msg.append('%d signatures changed, initial differences (first hash before, second after):' % + len(sig_diff)) + for diff in sorted(sig_diff_filtered): + recipe, taskname = diff[0].rsplit(':', 1) + cmd = 'bitbake-diffsigs --task %s %s --signature %s %s' % \ + (recipe, taskname, diff[1], diff[2]) + msg.append(' %s: %s -> %s' % diff) + msg.append(' %s' % cmd) + try: + output = check_command('Determining signature difference failed.', + cmd).decode('utf-8') + except RuntimeError as error: + output = str(error) + if output: + msg.extend([' ' + line for line in output.splitlines()]) + msg.append('') + return '\n'.join(msg) |