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- #
- # SPDX-License-Identifier: GPL-2.0-only
- #
- import hashlib
- import logging
- import os
- import re
- import tempfile
- import pickle
- import bb.data
- import difflib
- import simplediff
- from bb.checksum import FileChecksumCache
- logger = logging.getLogger('BitBake.SigGen')
- def init(d):
- siggens = [obj for obj in globals().values()
- if type(obj) is type and issubclass(obj, SignatureGenerator)]
- desired = d.getVar("BB_SIGNATURE_HANDLER") or "noop"
- for sg in siggens:
- if desired == sg.name:
- return sg(d)
- break
- else:
- logger.error("Invalid signature generator '%s', using default 'noop'\n"
- "Available generators: %s", desired,
- ', '.join(obj.name for obj in siggens))
- return SignatureGenerator(d)
- class SignatureGenerator(object):
- """
- """
- name = "noop"
- def __init__(self, data):
- self.basehash = {}
- self.taskhash = {}
- self.runtaskdeps = {}
- self.file_checksum_values = {}
- self.taints = {}
- def finalise(self, fn, d, varient):
- return
- def get_unihash(self, task):
- return self.taskhash[task]
- def get_taskhash(self, fn, task, deps, dataCache):
- return "0"
- def writeout_file_checksum_cache(self):
- """Write/update the file checksum cache onto disk"""
- return
- def stampfile(self, stampbase, file_name, taskname, extrainfo):
- return ("%s.%s.%s" % (stampbase, taskname, extrainfo)).rstrip('.')
- def stampcleanmask(self, stampbase, file_name, taskname, extrainfo):
- return ("%s.%s.%s" % (stampbase, taskname, extrainfo)).rstrip('.')
- def dump_sigtask(self, fn, task, stampbase, runtime):
- return
- def invalidate_task(self, task, d, fn):
- bb.build.del_stamp(task, d, fn)
- def dump_sigs(self, dataCache, options):
- return
- def get_taskdata(self):
- return (self.runtaskdeps, self.taskhash, self.file_checksum_values, self.taints, self.basehash)
- def set_taskdata(self, data):
- self.runtaskdeps, self.taskhash, self.file_checksum_values, self.taints, self.basehash = data
- def reset(self, data):
- self.__init__(data)
- class SignatureGeneratorBasic(SignatureGenerator):
- """
- """
- name = "basic"
- def __init__(self, data):
- self.basehash = {}
- self.taskhash = {}
- self.taskdeps = {}
- self.runtaskdeps = {}
- self.file_checksum_values = {}
- self.taints = {}
- self.gendeps = {}
- self.lookupcache = {}
- self.pkgnameextract = re.compile(r"(?P<fn>.*)\..*")
- self.basewhitelist = set((data.getVar("BB_HASHBASE_WHITELIST") or "").split())
- self.taskwhitelist = None
- self.init_rundepcheck(data)
- checksum_cache_file = data.getVar("BB_HASH_CHECKSUM_CACHE_FILE")
- if checksum_cache_file:
- self.checksum_cache = FileChecksumCache()
- self.checksum_cache.init_cache(data, checksum_cache_file)
- else:
- self.checksum_cache = None
- def init_rundepcheck(self, data):
- self.taskwhitelist = data.getVar("BB_HASHTASK_WHITELIST") or None
- if self.taskwhitelist:
- self.twl = re.compile(self.taskwhitelist)
- else:
- self.twl = None
- def _build_data(self, fn, d):
- ignore_mismatch = ((d.getVar("BB_HASH_IGNORE_MISMATCH") or '') == '1')
- tasklist, gendeps, lookupcache = bb.data.generate_dependencies(d)
- taskdeps, basehash = bb.data.generate_dependency_hash(tasklist, gendeps, lookupcache, self.basewhitelist, fn)
- for task in tasklist:
- k = fn + "." + task
- if not ignore_mismatch and k in self.basehash and self.basehash[k] != basehash[k]:
- bb.error("When reparsing %s, the basehash value changed from %s to %s. The metadata is not deterministic and this needs to be fixed." % (k, self.basehash[k], basehash[k]))
- bb.error("The following commands may help:")
- cmd = "$ bitbake %s -c%s" % (d.getVar('PN'), task)
- # Make sure sigdata is dumped before run printdiff
- bb.error("%s -Snone" % cmd)
- bb.error("Then:")
- bb.error("%s -Sprintdiff\n" % cmd)
- self.basehash[k] = basehash[k]
- self.taskdeps[fn] = taskdeps
- self.gendeps[fn] = gendeps
- self.lookupcache[fn] = lookupcache
- return taskdeps
- def finalise(self, fn, d, variant):
- mc = d.getVar("__BBMULTICONFIG", False) or ""
- if variant or mc:
- fn = bb.cache.realfn2virtual(fn, variant, mc)
- try:
- taskdeps = self._build_data(fn, d)
- except bb.parse.SkipRecipe:
- raise
- except:
- bb.warn("Error during finalise of %s" % fn)
- raise
- #Slow but can be useful for debugging mismatched basehashes
- #for task in self.taskdeps[fn]:
- # self.dump_sigtask(fn, task, d.getVar("STAMP"), False)
- for task in taskdeps:
- d.setVar("BB_BASEHASH_task-%s" % task, self.basehash[fn + "." + task])
- def rundep_check(self, fn, recipename, task, dep, depname, dataCache):
- # Return True if we should keep the dependency, False to drop it
- # We only manipulate the dependencies for packages not in the whitelist
- if self.twl and not self.twl.search(recipename):
- # then process the actual dependencies
- if self.twl.search(depname):
- return False
- return True
- def read_taint(self, fn, task, stampbase):
- taint = None
- try:
- with open(stampbase + '.' + task + '.taint', 'r') as taintf:
- taint = taintf.read()
- except IOError:
- pass
- return taint
- def get_taskhash(self, fn, task, deps, dataCache):
- mc = ''
- if fn.startswith('multiconfig:'):
- mc = fn.split(':')[1]
- k = fn + "." + task
- data = dataCache.basetaskhash[k]
- self.basehash[k] = data
- self.runtaskdeps[k] = []
- self.file_checksum_values[k] = []
- recipename = dataCache.pkg_fn[fn]
- for dep in sorted(deps, key=clean_basepath):
- pkgname = self.pkgnameextract.search(dep).group('fn')
- if mc:
- depmc = pkgname.split(':')[1]
- if mc != depmc:
- continue
- if dep.startswith("multiconfig:") and not mc:
- continue
- depname = dataCache.pkg_fn[pkgname]
- if not self.rundep_check(fn, recipename, task, dep, depname, dataCache):
- continue
- if dep not in self.taskhash:
- bb.fatal("%s is not in taskhash, caller isn't calling in dependency order?" % dep)
- data = data + self.get_unihash(dep)
- self.runtaskdeps[k].append(dep)
- if task in dataCache.file_checksums[fn]:
- if self.checksum_cache:
- checksums = self.checksum_cache.get_checksums(dataCache.file_checksums[fn][task], recipename)
- else:
- checksums = bb.fetch2.get_file_checksums(dataCache.file_checksums[fn][task], recipename)
- for (f,cs) in checksums:
- self.file_checksum_values[k].append((f,cs))
- if cs:
- data = data + cs
- taskdep = dataCache.task_deps[fn]
- if 'nostamp' in taskdep and task in taskdep['nostamp']:
- # Nostamp tasks need an implicit taint so that they force any dependent tasks to run
- import uuid
- taint = str(uuid.uuid4())
- data = data + taint
- self.taints[k] = "nostamp:" + taint
- taint = self.read_taint(fn, task, dataCache.stamp[fn])
- if taint:
- data = data + taint
- self.taints[k] = taint
- logger.warning("%s is tainted from a forced run" % k)
- h = hashlib.sha256(data.encode("utf-8")).hexdigest()
- self.taskhash[k] = h
- #d.setVar("BB_TASKHASH_task-%s" % task, taskhash[task])
- return h
- def writeout_file_checksum_cache(self):
- """Write/update the file checksum cache onto disk"""
- if self.checksum_cache:
- self.checksum_cache.save_extras()
- self.checksum_cache.save_merge()
- else:
- bb.fetch2.fetcher_parse_save()
- bb.fetch2.fetcher_parse_done()
- def dump_sigtask(self, fn, task, stampbase, runtime):
- k = fn + "." + task
- referencestamp = stampbase
- if isinstance(runtime, str) and runtime.startswith("customfile"):
- sigfile = stampbase
- referencestamp = runtime[11:]
- elif runtime and k in self.taskhash:
- sigfile = stampbase + "." + task + ".sigdata" + "." + self.taskhash[k]
- else:
- sigfile = stampbase + "." + task + ".sigbasedata" + "." + self.basehash[k]
- bb.utils.mkdirhier(os.path.dirname(sigfile))
- data = {}
- data['task'] = task
- data['basewhitelist'] = self.basewhitelist
- data['taskwhitelist'] = self.taskwhitelist
- data['taskdeps'] = self.taskdeps[fn][task]
- data['basehash'] = self.basehash[k]
- data['gendeps'] = {}
- data['varvals'] = {}
- data['varvals'][task] = self.lookupcache[fn][task]
- for dep in self.taskdeps[fn][task]:
- if dep in self.basewhitelist:
- continue
- data['gendeps'][dep] = self.gendeps[fn][dep]
- data['varvals'][dep] = self.lookupcache[fn][dep]
- if runtime and k in self.taskhash:
- data['runtaskdeps'] = self.runtaskdeps[k]
- data['file_checksum_values'] = [(os.path.basename(f), cs) for f,cs in self.file_checksum_values[k]]
- data['runtaskhashes'] = {}
- for dep in data['runtaskdeps']:
- data['runtaskhashes'][dep] = self.get_unihash(dep)
- data['taskhash'] = self.taskhash[k]
- taint = self.read_taint(fn, task, referencestamp)
- if taint:
- data['taint'] = taint
- if runtime and k in self.taints:
- if 'nostamp:' in self.taints[k]:
- data['taint'] = self.taints[k]
- computed_basehash = calc_basehash(data)
- if computed_basehash != self.basehash[k]:
- bb.error("Basehash mismatch %s versus %s for %s" % (computed_basehash, self.basehash[k], k))
- if runtime and k in self.taskhash:
- computed_taskhash = calc_taskhash(data)
- if computed_taskhash != self.taskhash[k]:
- bb.error("Taskhash mismatch %s versus %s for %s" % (computed_taskhash, self.taskhash[k], k))
- sigfile = sigfile.replace(self.taskhash[k], computed_taskhash)
- fd, tmpfile = tempfile.mkstemp(dir=os.path.dirname(sigfile), prefix="sigtask.")
- try:
- with os.fdopen(fd, "wb") as stream:
- p = pickle.dump(data, stream, -1)
- stream.flush()
- os.chmod(tmpfile, 0o664)
- os.rename(tmpfile, sigfile)
- except (OSError, IOError) as err:
- try:
- os.unlink(tmpfile)
- except OSError:
- pass
- raise err
- def dump_sigfn(self, fn, dataCaches, options):
- if fn in self.taskdeps:
- for task in self.taskdeps[fn]:
- tid = fn + ":" + task
- (mc, _, _) = bb.runqueue.split_tid(tid)
- k = fn + "." + task
- if k not in self.taskhash:
- continue
- if dataCaches[mc].basetaskhash[k] != self.basehash[k]:
- bb.error("Bitbake's cached basehash does not match the one we just generated (%s)!" % k)
- bb.error("The mismatched hashes were %s and %s" % (dataCaches[mc].basetaskhash[k], self.basehash[k]))
- self.dump_sigtask(fn, task, dataCaches[mc].stamp[fn], True)
- class SignatureGeneratorBasicHash(SignatureGeneratorBasic):
- name = "basichash"
- def get_stampfile_hash(self, task):
- if task in self.taskhash:
- return self.taskhash[task]
- # If task is not in basehash, then error
- return self.basehash[task]
- def stampfile(self, stampbase, fn, taskname, extrainfo, clean=False):
- if taskname != "do_setscene" and taskname.endswith("_setscene"):
- k = fn + "." + taskname[:-9]
- else:
- k = fn + "." + taskname
- if clean:
- h = "*"
- else:
- h = self.get_stampfile_hash(k)
- return ("%s.%s.%s.%s" % (stampbase, taskname, h, extrainfo)).rstrip('.')
- def stampcleanmask(self, stampbase, fn, taskname, extrainfo):
- return self.stampfile(stampbase, fn, taskname, extrainfo, clean=True)
- def invalidate_task(self, task, d, fn):
- bb.note("Tainting hash to force rebuild of task %s, %s" % (fn, task))
- bb.build.write_taint(task, d, fn)
- def dump_this_task(outfile, d):
- import bb.parse
- fn = d.getVar("BB_FILENAME")
- task = "do_" + d.getVar("BB_CURRENTTASK")
- referencestamp = bb.build.stamp_internal(task, d, None, True)
- bb.parse.siggen.dump_sigtask(fn, task, outfile, "customfile:" + referencestamp)
- def init_colors(enable_color):
- """Initialise colour dict for passing to compare_sigfiles()"""
- # First set up the colours
- colors = {'color_title': '\033[1m',
- 'color_default': '\033[0m',
- 'color_add': '\033[0;32m',
- 'color_remove': '\033[0;31m',
- }
- # Leave all keys present but clear the values
- if not enable_color:
- for k in colors.keys():
- colors[k] = ''
- return colors
- def worddiff_str(oldstr, newstr, colors=None):
- if not colors:
- colors = init_colors(False)
- diff = simplediff.diff(oldstr.split(' '), newstr.split(' '))
- ret = []
- for change, value in diff:
- value = ' '.join(value)
- if change == '=':
- ret.append(value)
- elif change == '+':
- item = '{color_add}{{+{value}+}}{color_default}'.format(value=value, **colors)
- ret.append(item)
- elif change == '-':
- item = '{color_remove}[-{value}-]{color_default}'.format(value=value, **colors)
- ret.append(item)
- whitespace_note = ''
- if oldstr != newstr and ' '.join(oldstr.split()) == ' '.join(newstr.split()):
- whitespace_note = ' (whitespace changed)'
- return '"%s"%s' % (' '.join(ret), whitespace_note)
- def list_inline_diff(oldlist, newlist, colors=None):
- if not colors:
- colors = init_colors(False)
- diff = simplediff.diff(oldlist, newlist)
- ret = []
- for change, value in diff:
- value = ' '.join(value)
- if change == '=':
- ret.append("'%s'" % value)
- elif change == '+':
- item = '{color_add}+{value}{color_default}'.format(value=value, **colors)
- ret.append(item)
- elif change == '-':
- item = '{color_remove}-{value}{color_default}'.format(value=value, **colors)
- ret.append(item)
- return '[%s]' % (', '.join(ret))
- def clean_basepath(a):
- mc = None
- if a.startswith("multiconfig:"):
- _, mc, a = a.split(":", 2)
- b = a.rsplit("/", 2)[1] + '/' + a.rsplit("/", 2)[2]
- if a.startswith("virtual:"):
- b = b + ":" + a.rsplit(":", 1)[0]
- if mc:
- b = b + ":multiconfig:" + mc
- return b
- def clean_basepaths(a):
- b = {}
- for x in a:
- b[clean_basepath(x)] = a[x]
- return b
- def clean_basepaths_list(a):
- b = []
- for x in a:
- b.append(clean_basepath(x))
- return b
- def compare_sigfiles(a, b, recursecb=None, color=False, collapsed=False):
- output = []
- colors = init_colors(color)
- def color_format(formatstr, **values):
- """
- Return colour formatted string.
- NOTE: call with the format string, not an already formatted string
- containing values (otherwise you could have trouble with { and }
- characters)
- """
- if not formatstr.endswith('{color_default}'):
- formatstr += '{color_default}'
- # In newer python 3 versions you can pass both of these directly,
- # but we only require 3.4 at the moment
- formatparams = {}
- formatparams.update(colors)
- formatparams.update(values)
- return formatstr.format(**formatparams)
- with open(a, 'rb') as f:
- p1 = pickle.Unpickler(f)
- a_data = p1.load()
- with open(b, 'rb') as f:
- p2 = pickle.Unpickler(f)
- b_data = p2.load()
- def dict_diff(a, b, whitelist=set()):
- sa = set(a.keys())
- sb = set(b.keys())
- common = sa & sb
- changed = set()
- for i in common:
- if a[i] != b[i] and i not in whitelist:
- changed.add(i)
- added = sb - sa
- removed = sa - sb
- return changed, added, removed
- def file_checksums_diff(a, b):
- from collections import Counter
- # Handle old siginfo format
- if isinstance(a, dict):
- a = [(os.path.basename(f), cs) for f, cs in a.items()]
- if isinstance(b, dict):
- b = [(os.path.basename(f), cs) for f, cs in b.items()]
- # Compare lists, ensuring we can handle duplicate filenames if they exist
- removedcount = Counter(a)
- removedcount.subtract(b)
- addedcount = Counter(b)
- addedcount.subtract(a)
- added = []
- for x in b:
- if addedcount[x] > 0:
- addedcount[x] -= 1
- added.append(x)
- removed = []
- changed = []
- for x in a:
- if removedcount[x] > 0:
- removedcount[x] -= 1
- for y in added:
- if y[0] == x[0]:
- changed.append((x[0], x[1], y[1]))
- added.remove(y)
- break
- else:
- removed.append(x)
- added = [x[0] for x in added]
- removed = [x[0] for x in removed]
- return changed, added, removed
- if 'basewhitelist' in a_data and a_data['basewhitelist'] != b_data['basewhitelist']:
- output.append(color_format("{color_title}basewhitelist changed{color_default} from '%s' to '%s'") % (a_data['basewhitelist'], b_data['basewhitelist']))
- if a_data['basewhitelist'] and b_data['basewhitelist']:
- output.append("changed items: %s" % a_data['basewhitelist'].symmetric_difference(b_data['basewhitelist']))
- if 'taskwhitelist' in a_data and a_data['taskwhitelist'] != b_data['taskwhitelist']:
- output.append(color_format("{color_title}taskwhitelist changed{color_default} from '%s' to '%s'") % (a_data['taskwhitelist'], b_data['taskwhitelist']))
- if a_data['taskwhitelist'] and b_data['taskwhitelist']:
- output.append("changed items: %s" % a_data['taskwhitelist'].symmetric_difference(b_data['taskwhitelist']))
- if a_data['taskdeps'] != b_data['taskdeps']:
- output.append(color_format("{color_title}Task dependencies changed{color_default} from:\n%s\nto:\n%s") % (sorted(a_data['taskdeps']), sorted(b_data['taskdeps'])))
- if a_data['basehash'] != b_data['basehash'] and not collapsed:
- output.append(color_format("{color_title}basehash changed{color_default} from %s to %s") % (a_data['basehash'], b_data['basehash']))
- changed, added, removed = dict_diff(a_data['gendeps'], b_data['gendeps'], a_data['basewhitelist'] & b_data['basewhitelist'])
- if changed:
- for dep in changed:
- output.append(color_format("{color_title}List of dependencies for variable %s changed from '{color_default}%s{color_title}' to '{color_default}%s{color_title}'") % (dep, a_data['gendeps'][dep], b_data['gendeps'][dep]))
- if a_data['gendeps'][dep] and b_data['gendeps'][dep]:
- output.append("changed items: %s" % a_data['gendeps'][dep].symmetric_difference(b_data['gendeps'][dep]))
- if added:
- for dep in added:
- output.append(color_format("{color_title}Dependency on variable %s was added") % (dep))
- if removed:
- for dep in removed:
- output.append(color_format("{color_title}Dependency on Variable %s was removed") % (dep))
- changed, added, removed = dict_diff(a_data['varvals'], b_data['varvals'])
- if changed:
- for dep in changed:
- oldval = a_data['varvals'][dep]
- newval = b_data['varvals'][dep]
- if newval and oldval and ('\n' in oldval or '\n' in newval):
- diff = difflib.unified_diff(oldval.splitlines(), newval.splitlines(), lineterm='')
- # Cut off the first two lines, since we aren't interested in
- # the old/new filename (they are blank anyway in this case)
- difflines = list(diff)[2:]
- if color:
- # Add colour to diff output
- for i, line in enumerate(difflines):
- if line.startswith('+'):
- line = color_format('{color_add}{line}', line=line)
- difflines[i] = line
- elif line.startswith('-'):
- line = color_format('{color_remove}{line}', line=line)
- difflines[i] = line
- output.append(color_format("{color_title}Variable {var} value changed:{color_default}\n{diff}", var=dep, diff='\n'.join(difflines)))
- elif newval and oldval and (' ' in oldval or ' ' in newval):
- output.append(color_format("{color_title}Variable {var} value changed:{color_default}\n{diff}", var=dep, diff=worddiff_str(oldval, newval, colors)))
- else:
- output.append(color_format("{color_title}Variable {var} value changed from '{color_default}{oldval}{color_title}' to '{color_default}{newval}{color_title}'{color_default}", var=dep, oldval=oldval, newval=newval))
- if not 'file_checksum_values' in a_data:
- a_data['file_checksum_values'] = {}
- if not 'file_checksum_values' in b_data:
- b_data['file_checksum_values'] = {}
- changed, added, removed = file_checksums_diff(a_data['file_checksum_values'], b_data['file_checksum_values'])
- if changed:
- for f, old, new in changed:
- output.append(color_format("{color_title}Checksum for file %s changed{color_default} from %s to %s") % (f, old, new))
- if added:
- for f in added:
- output.append(color_format("{color_title}Dependency on checksum of file %s was added") % (f))
- if removed:
- for f in removed:
- output.append(color_format("{color_title}Dependency on checksum of file %s was removed") % (f))
- if not 'runtaskdeps' in a_data:
- a_data['runtaskdeps'] = {}
- if not 'runtaskdeps' in b_data:
- b_data['runtaskdeps'] = {}
- if not collapsed:
- if len(a_data['runtaskdeps']) != len(b_data['runtaskdeps']):
- changed = ["Number of task dependencies changed"]
- else:
- changed = []
- for idx, task in enumerate(a_data['runtaskdeps']):
- a = a_data['runtaskdeps'][idx]
- b = b_data['runtaskdeps'][idx]
- if a_data['runtaskhashes'][a] != b_data['runtaskhashes'][b] and not collapsed:
- changed.append("%s with hash %s\n changed to\n%s with hash %s" % (clean_basepath(a), a_data['runtaskhashes'][a], clean_basepath(b), b_data['runtaskhashes'][b]))
- if changed:
- clean_a = clean_basepaths_list(a_data['runtaskdeps'])
- clean_b = clean_basepaths_list(b_data['runtaskdeps'])
- if clean_a != clean_b:
- output.append(color_format("{color_title}runtaskdeps changed:{color_default}\n%s") % list_inline_diff(clean_a, clean_b, colors))
- else:
- output.append(color_format("{color_title}runtaskdeps changed:"))
- output.append("\n".join(changed))
- if 'runtaskhashes' in a_data and 'runtaskhashes' in b_data:
- a = a_data['runtaskhashes']
- b = b_data['runtaskhashes']
- changed, added, removed = dict_diff(a, b)
- if added:
- for dep in added:
- bdep_found = False
- if removed:
- for bdep in removed:
- if b[dep] == a[bdep]:
- #output.append("Dependency on task %s was replaced by %s with same hash" % (dep, bdep))
- bdep_found = True
- if not bdep_found:
- output.append(color_format("{color_title}Dependency on task %s was added{color_default} with hash %s") % (clean_basepath(dep), b[dep]))
- if removed:
- for dep in removed:
- adep_found = False
- if added:
- for adep in added:
- if b[adep] == a[dep]:
- #output.append("Dependency on task %s was replaced by %s with same hash" % (adep, dep))
- adep_found = True
- if not adep_found:
- output.append(color_format("{color_title}Dependency on task %s was removed{color_default} with hash %s") % (clean_basepath(dep), a[dep]))
- if changed:
- for dep in changed:
- if not collapsed:
- output.append(color_format("{color_title}Hash for dependent task %s changed{color_default} from %s to %s") % (clean_basepath(dep), a[dep], b[dep]))
- if callable(recursecb):
- recout = recursecb(dep, a[dep], b[dep])
- if recout:
- if collapsed:
- output.extend(recout)
- else:
- # If a dependent hash changed, might as well print the line above and then defer to the changes in
- # that hash since in all likelyhood, they're the same changes this task also saw.
- output = [output[-1]] + recout
- a_taint = a_data.get('taint', None)
- b_taint = b_data.get('taint', None)
- if a_taint != b_taint:
- if a_taint.startswith('nostamp:'):
- a_taint = a_taint.replace('nostamp:', 'nostamp(uuid4):')
- if b_taint.startswith('nostamp:'):
- b_taint = b_taint.replace('nostamp:', 'nostamp(uuid4):')
- output.append(color_format("{color_title}Taint (by forced/invalidated task) changed{color_default} from %s to %s") % (a_taint, b_taint))
- return output
- def calc_basehash(sigdata):
- task = sigdata['task']
- basedata = sigdata['varvals'][task]
- if basedata is None:
- basedata = ''
- alldeps = sigdata['taskdeps']
- for dep in alldeps:
- basedata = basedata + dep
- val = sigdata['varvals'][dep]
- if val is not None:
- basedata = basedata + str(val)
- return hashlib.sha256(basedata.encode("utf-8")).hexdigest()
- def calc_taskhash(sigdata):
- data = sigdata['basehash']
- for dep in sigdata['runtaskdeps']:
- data = data + sigdata['runtaskhashes'][dep]
- for c in sigdata['file_checksum_values']:
- if c[1]:
- data = data + c[1]
- if 'taint' in sigdata:
- if 'nostamp:' in sigdata['taint']:
- data = data + sigdata['taint'][8:]
- else:
- data = data + sigdata['taint']
- return hashlib.sha256(data.encode("utf-8")).hexdigest()
- def dump_sigfile(a):
- output = []
- with open(a, 'rb') as f:
- p1 = pickle.Unpickler(f)
- a_data = p1.load()
- output.append("basewhitelist: %s" % (a_data['basewhitelist']))
- output.append("taskwhitelist: %s" % (a_data['taskwhitelist']))
- output.append("Task dependencies: %s" % (sorted(a_data['taskdeps'])))
- output.append("basehash: %s" % (a_data['basehash']))
- for dep in a_data['gendeps']:
- output.append("List of dependencies for variable %s is %s" % (dep, a_data['gendeps'][dep]))
- for dep in a_data['varvals']:
- output.append("Variable %s value is %s" % (dep, a_data['varvals'][dep]))
- if 'runtaskdeps' in a_data:
- output.append("Tasks this task depends on: %s" % (a_data['runtaskdeps']))
- if 'file_checksum_values' in a_data:
- output.append("This task depends on the checksums of files: %s" % (a_data['file_checksum_values']))
- if 'runtaskhashes' in a_data:
- for dep in a_data['runtaskhashes']:
- output.append("Hash for dependent task %s is %s" % (dep, a_data['runtaskhashes'][dep]))
- if 'taint' in a_data:
- if a_data['taint'].startswith('nostamp:'):
- msg = a_data['taint'].replace('nostamp:', 'nostamp(uuid4):')
- else:
- msg = a_data['taint']
- output.append("Tainted (by forced/invalidated task): %s" % msg)
- if 'task' in a_data:
- computed_basehash = calc_basehash(a_data)
- output.append("Computed base hash is %s and from file %s" % (computed_basehash, a_data['basehash']))
- else:
- output.append("Unable to compute base hash")
- computed_taskhash = calc_taskhash(a_data)
- output.append("Computed task hash is %s" % computed_taskhash)
- return output
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