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[Notes] [Git][BuildStream/buildstream][jmac/remote_execution_client] 19 commits: cascache.py: Preparation for remote execution

Title: GitLab

Martin Blanchard pushed to branch jmac/remote_execution_client at BuildStream / buildstream

Commits:

25 changed files:

Changes:

  • buildstream/_artifactcache/cascache.py
    ... ... @@ -19,6 +19,7 @@
    19 19
    20 20 
     import hashlib
    21 21 
     import itertools
    22 
    +import io
    22 23 
     import multiprocessing
    23 24 
     import os
    24 25 
     import signal
    ... ... @@ -76,6 +77,7 @@ class CASCache(ArtifactCache):
    76 77 
         ################################################
    77 78 
         #     Implementation of abstract methods       #
    78 79 
         ################################################
    80 
    +
    79 81 
         def contains(self, element, key):
    80 82 
             refpath = self._refpath(self.get_artifact_fullname(element, key))
    81 83
    ... ... @@ -153,6 +155,7 @@ class CASCache(ArtifactCache):
    153 155 
             q = multiprocessing.Queue()
    154 156 
             for remote_spec in remote_specs:
    155 157 
                 # Use subprocess to avoid creation of gRPC threads in main BuildStream process
    158 
    +            # See https://github.com/grpc/grpc/blob/master/doc/fork_support.md for details
    156 159 
                 p = multiprocessing.Process(target=self._initialize_remote, args=(remote_spec, q))
    157 160
    158 161 
                 try:
    ... ... @@ -259,6 +262,25 @@ class CASCache(ArtifactCache):
    259 262
    260 263 
             return False
    261 264
    265 
    +    def pull_tree(self, project, digest):
    266 
    +        """ Pull a single Tree rather than an artifact.
    267 
    +        Does not update local refs. """
    268 
    +
    269 
    +        for remote in self._remotes[project]:
    270 
    +            try:
    271 
    +                remote.init()
    272 
    +
    273 
    +                digest = self._fetch_tree(remote, digest)
    274 
    +
    275 
    +                # no need to pull from additional remotes
    276 
    +                return digest
    277 
    +
    278 
    +            except grpc.RpcError as e:
    279 
    +                if e.code() != grpc.StatusCode.NOT_FOUND:
    280 
    +                    raise
    281 
    +
    282 
    +        return None
    283 
    +
    262 284 
         def link_key(self, element, oldkey, newkey):
    263 285 
             oldref = self.get_artifact_fullname(element, oldkey)
    264 286 
             newref = self.get_artifact_fullname(element, newkey)
    ... ... @@ -267,8 +289,46 @@ class CASCache(ArtifactCache):
    267 289
    268 290 
             self.set_ref(newref, tree)
    269 291
    292 
    +    def _push_refs_to_remote(self, refs, remote):
    293 
    +        skipped_remote = True
    294 
    +        try:
    295 
    +            for ref in refs:
    296 
    +                tree = self.resolve_ref(ref)
    297 
    +
    298 
    +                # Check whether ref is already on the server in which case
    299 
    +                # there is no need to push the artifact
    300 
    +                try:
    301 
    +                    request = buildstream_pb2.GetReferenceRequest()
    302 
    +                    request.key = ref
    303 
    +                    response = remote.ref_storage.GetReference(request)
    304 
    +
    305 
    +                    if response.digest.hash == tree.hash and response.digest.size_bytes == tree.size_bytes:
    306 
    +                        # ref is already on the server with the same tree
    307 
    +                        continue
    308 
    +
    309 
    +                except grpc.RpcError as e:
    310 
    +                    if e.code() != grpc.StatusCode.NOT_FOUND:
    311 
    +                        # Intentionally re-raise RpcError for outer except block.
    312 
    +                        raise
    313 
    +
    314 
    +                self._send_directory(remote, tree)
    315 
    +
    316 
    +                request = buildstream_pb2.UpdateReferenceRequest()
    317 
    +                request.keys.append(ref)
    318 
    +                request.digest.hash = tree.hash
    319 
    +                request.digest.size_bytes = tree.size_bytes
    320 
    +                remote.ref_storage.UpdateReference(request)
    321 
    +
    322 
    +                skipped_remote = False
    323 
    +        except grpc.RpcError as e:
    324 
    +            if e.code() != grpc.StatusCode.RESOURCE_EXHAUSTED:
    325 
    +                raise ArtifactError("Failed to push artifact {}: {}".format(refs, e), temporary=True) from e
    326 
    +
    327 
    +        return not skipped_remote
    328 
    +
    270 329 
         def push(self, element, keys):
    271 
    -        refs = [self.get_artifact_fullname(element, key) for key in keys]
    330 
    +
    331 
    +        refs = [self.get_artifact_fullname(element, key) for key in list(keys)]
    272 332
    273 333 
             project = element._get_project()
    274 334
    ... ... @@ -278,95 +338,77 @@ class CASCache(ArtifactCache):
    278 338
    279 339 
             for remote in push_remotes:
    280 340 
                 remote.init()
    281 
    -            skipped_remote = True
    282 
    -            element.info("Pushing {} -> {}".format(element._get_brief_display_key(), remote.spec.url))
    283 341
    284 
    -            try:
    285 
    -                for ref in refs:
    286 
    -                    tree = self.resolve_ref(ref)
    287 
    -
    288 
    -                    # Check whether ref is already on the server in which case
    289 
    -                    # there is no need to push the artifact
    290 
    -                    try:
    291 
    -                        request = buildstream_pb2.GetReferenceRequest()
    292 
    -                        request.key = ref
    293 
    -                        response = remote.ref_storage.GetReference(request)
    294 
    -
    295 
    -                        if response.digest.hash == tree.hash and response.digest.size_bytes == tree.size_bytes:
    296 
    -                            # ref is already on the server with the same tree
    297 
    -                            continue
    298 
    -
    299 
    -                    except grpc.RpcError as e:
    300 
    -                        if e.code() != grpc.StatusCode.NOT_FOUND:
    301 
    -                            # Intentionally re-raise RpcError for outer except block.
    302 
    -                            raise
    303 
    -
    304 
    -                    missing_blobs = {}
    305 
    -                    required_blobs = self._required_blobs(tree)
    306 
    -
    307 
    -                    # Limit size of FindMissingBlobs request
    308 
    -                    for required_blobs_group in _grouper(required_blobs, 512):
    309 
    -                        request = remote_execution_pb2.FindMissingBlobsRequest()
    310 
    -
    311 
    -                        for required_digest in required_blobs_group:
    312 
    -                            d = request.blob_digests.add()
    313 
    -                            d.hash = required_digest.hash
    314 
    -                            d.size_bytes = required_digest.size_bytes
    315 
    -
    316 
    -                        response = remote.cas.FindMissingBlobs(request)
    317 
    -                        for digest in response.missing_blob_digests:
    318 
    -                            d = remote_execution_pb2.Digest()
    319 
    -                            d.hash = digest.hash
    320 
    -                            d.size_bytes = digest.size_bytes
    321 
    -                            missing_blobs[d.hash] = d
    322 
    -
    323 
    -                    # Upload any blobs missing on the server
    324 
    -                    skipped_remote = False
    325 
    -                    for digest in missing_blobs.values():
    326 
    -                        uuid_ = uuid.uuid4()
    327 
    -                        resource_name = '/'.join(['uploads', str(uuid_), 'blobs',
    328 
    -                                                  digest.hash, str(digest.size_bytes)])
    329 
    -
    330 
    -                        def request_stream(resname):
    331 
    -                            with open(self.objpath(digest), 'rb') as f:
    332 
    -                                assert os.fstat(f.fileno()).st_size == digest.size_bytes
    333 
    -                                offset = 0
    334 
    -                                finished = False
    335 
    -                                remaining = digest.size_bytes
    336 
    -                                while not finished:
    337 
    -                                    chunk_size = min(remaining, 64 * 1024)
    338 
    -                                    remaining -= chunk_size
    339 
    -
    340 
    -                                    request = bytestream_pb2.WriteRequest()
    341 
    -                                    request.write_offset = offset
    342 
    -                                    # max. 64 kB chunks
    343 
    -                                    request.data = f.read(chunk_size)
    344 
    -                                    request.resource_name = resname
    345 
    -                                    request.finish_write = remaining <= 0
    346 
    -                                    yield request
    347 
    -                                    offset += chunk_size
    348 
    -                                    finished = request.finish_write
    349 
    -                        response = remote.bytestream.Write(request_stream(resource_name))
    350 
    -
    351 
    -                    request = buildstream_pb2.UpdateReferenceRequest()
    352 
    -                    request.keys.append(ref)
    353 
    -                    request.digest.hash = tree.hash
    354 
    -                    request.digest.size_bytes = tree.size_bytes
    355 
    -                    remote.ref_storage.UpdateReference(request)
    356 
    -
    357 
    -                    pushed = True
    358 
    -
    359 
    -            except grpc.RpcError as e:
    360 
    -                if e.code() != grpc.StatusCode.RESOURCE_EXHAUSTED:
    361 
    -                    raise ArtifactError("Failed to push artifact {}: {}".format(refs, e), temporary=True) from e
    342 
    +            element.info("Pushing {} -> {}".format(element._get_brief_display_key(), remote.spec.url))
    362 343
    363 
    -            if skipped_remote:
    344 
    +            if self._push_refs_to_remote(refs, remote):
    345 
    +                pushed = True
    346 
    +            else:
    364 347 
                     self.context.message(Message(
    365 348 
                         None,
    366 349 
                         MessageType.SKIPPED,
    367 350 
                         "Remote ({}) already has {} cached".format(
    368 351 
                             remote.spec.url, element._get_brief_display_key())
    369 352 
                     ))
    353 
    +
    354 
    +        return pushed
    355 
    +
    356 
    +    def push_directory(self, project, directory):
    357 
    +
    358 
    +        push_remotes = [r for r in self._remotes[project] if r.spec.push]
    359 
    +
    360 
    +        if directory.ref is None:
    361 
    +            return None
    362 
    +
    363 
    +        for remote in push_remotes:
    364 
    +            remote.init()
    365 
    +
    366 
    +            self._send_directory(remote, directory.ref)
    367 
    +
    368 
    +        return directory.ref
    369 
    +
    370 
    +    def push_message(self, project, message):
    371 
    +
    372 
    +        push_remotes = [r for r in self._remotes[project] if r.spec.push]
    373 
    +
    374 
    +        message_buffer = message.SerializeToString()
    375 
    +        message_sha = hashlib.sha256(message_buffer)
    376 
    +        message_digest = remote_execution_pb2.Digest()
    377 
    +        message_digest.hash = message_sha.hexdigest()
    378 
    +        message_digest.size_bytes = len(message_buffer)
    379 
    +
    380 
    +        for remote in push_remotes:
    381 
    +            remote.init()
    382 
    +
    383 
    +            with io.BytesIO(message_buffer) as b:
    384 
    +                self._send_blob(remote, message_digest, b)
    385 
    +
    386 
    +        return message_digest
    387 
    +
    388 
    +    def _verify_digest_on_remote(self, remote, digest):
    389 
    +        # Check whether ref is already on the server in which case
    390 
    +        # there is no need to push the artifact
    391 
    +        request = remote_execution_pb2.FindMissingBlobsRequest()
    392 
    +        request.blob_digests.extend([digest])
    393 
    +
    394 
    +        response = remote.cas.FindMissingBlobs(request)
    395 
    +        if digest in response.missing_blob_digests:
    396 
    +            return False
    397 
    +
    398 
    +        return True
    399 
    +
    400 
    +    def verify_digest_pushed(self, project, digest):
    401 
    +
    402 
    +        push_remotes = [r for r in self._remotes[project] if r.spec.push]
    403 
    +
    404 
    +        pushed = False
    405 
    +
    406 
    +        for remote in push_remotes:
    407 
    +            remote.init()
    408 
    +
    409 
    +            if self._verify_digest_on_remote(remote, digest):
    410 
    +                pushed = True
    411 
    +
    370 412 
             return pushed
    371 413
    372 414 
         ################################################
    ... ... @@ -599,6 +641,7 @@ class CASCache(ArtifactCache):
    599 641 
         ################################################
    600 642 
         #             Local Private Methods            #
    601 643 
         ################################################
    644 
    +
    602 645 
         def _checkout(self, dest, tree):
    603 646 
             os.makedirs(dest, exist_ok=True)
    604 647
    ... ... @@ -761,16 +804,16 @@ class CASCache(ArtifactCache):
    761 804 
                 #
    762 805 
                 q.put(str(e))
    763 806
    764 
    -    def _required_blobs(self, tree):
    807 
    +    def _required_blobs(self, directory_digest):
    765 808 
             # parse directory, and recursively add blobs
    766 809 
             d = remote_execution_pb2.Digest()
    767 
    -        d.hash = tree.hash
    768 
    -        d.size_bytes = tree.size_bytes
    810 
    +        d.hash = directory_digest.hash
    811 
    +        d.size_bytes = directory_digest.size_bytes
    769 812 
             yield d
    770 813
    771 814 
             directory = remote_execution_pb2.Directory()
    772 815
    773 
    -        with open(self.objpath(tree), 'rb') as f:
    816 
    +        with open(self.objpath(directory_digest), 'rb') as f:
    774 817 
                 directory.ParseFromString(f.read())
    775 818
    776 819 
             for filenode in directory.files:
    ... ... @@ -782,16 +825,16 @@ class CASCache(ArtifactCache):
    782 825 
             for dirnode in directory.directories:
    783 826 
                 yield from self._required_blobs(dirnode.digest)
    784 827
    785 
    -    def _fetch_blob(self, remote, digest, out):
    828 
    +    def _fetch_blob(self, remote, digest, stream):
    786 829 
             resource_name = '/'.join(['blobs', digest.hash, str(digest.size_bytes)])
    787 830 
             request = bytestream_pb2.ReadRequest()
    788 831 
             request.resource_name = resource_name
    789 832 
             request.read_offset = 0
    790 833 
             for response in remote.bytestream.Read(request):
    791 
    -            out.write(response.data)
    834 
    +            stream.write(response.data)
    835 
    +        stream.flush()
    792 836
    793 
    -        out.flush()
    794 
    -        assert digest.size_bytes == os.fstat(out.fileno()).st_size
    837 
    +        assert digest.size_bytes == os.fstat(stream.fileno()).st_size
    795 838
    796 839 
         def _fetch_directory(self, remote, tree):
    797 840 
             objpath = self.objpath(tree)
    ... ... @@ -827,6 +870,92 @@ class CASCache(ArtifactCache):
    827 870 
                 digest = self.add_object(path=out.name)
    828 871 
                 assert digest.hash == tree.hash
    829 872
    873 
    +    def _fetch_tree(self, remote, digest):
    874 
    +        # download but do not store the Tree object
    875 
    +        with tempfile.NamedTemporaryFile(dir=self.tmpdir) as out:
    876 
    +            self._fetch_blob(remote, digest, out)
    877 
    +
    878 
    +            tree = remote_execution_pb2.Tree()
    879 
    +
    880 
    +            with open(out.name, 'rb') as f:
    881 
    +                tree.ParseFromString(f.read())
    882 
    +
    883 
    +            tree.children.extend([tree.root])
    884 
    +            for directory in tree.children:
    885 
    +                for filenode in directory.files:
    886 
    +                    fileobjpath = self.objpath(filenode.digest)
    887 
    +                    if os.path.exists(fileobjpath):
    888 
    +                        # already in local cache
    889 
    +                        continue
    890 
    +
    891 
    +                    with tempfile.NamedTemporaryFile(dir=self.tmpdir) as f:
    892 
    +                        self._fetch_blob(remote, filenode.digest, f)
    893 
    +
    894 
    +                        added_digest = self.add_object(path=f.name)
    895 
    +                        assert added_digest.hash == filenode.digest.hash
    896 
    +
    897 
    +                # place directory blob only in final location when we've downloaded
    898 
    +                # all referenced blobs to avoid dangling references in the repository
    899 
    +                dirbuffer = directory.SerializeToString()
    900 
    +                dirdigest = self.add_object(buffer=dirbuffer)
    901 
    +                assert dirdigest.size_bytes == len(dirbuffer)
    902 
    +
    903 
    +        return dirdigest
    904 
    +
    905 
    +    def _send_blob(self, remote, digest, stream, u_uid=uuid.uuid4()):
    906 
    +        resource_name = '/'.join(['uploads', str(u_uid), 'blobs',
    907 
    +                                  digest.hash, str(digest.size_bytes)])
    908 
    +
    909 
    +        def request_stream(resname, instream):
    910 
    +            offset = 0
    911 
    +            finished = False
    912 
    +            remaining = digest.size_bytes
    913 
    +            while not finished:
    914 
    +                chunk_size = min(remaining, 64 * 1024)
    915 
    +                remaining -= chunk_size
    916 
    +
    917 
    +                request = bytestream_pb2.WriteRequest()
    918 
    +                request.write_offset = offset
    919 
    +                # max. 64 kB chunks
    920 
    +                request.data = instream.read(chunk_size)
    921 
    +                request.resource_name = resname
    922 
    +                request.finish_write = remaining <= 0
    923 
    +
    924 
    +                yield request
    925 
    +
    926 
    +                offset += chunk_size
    927 
    +                finished = request.finish_write
    928 
    +
    929 
    +        response = remote.bytestream.Write(request_stream(resource_name, stream))
    930 
    +
    931 
    +        assert response.committed_size == digest.size_bytes
    932 
    +
    933 
    +    def _send_directory(self, remote, digest, u_uid=uuid.uuid4()):
    934 
    +        required_blobs = self._required_blobs(digest)
    935 
    +
    936 
    +        missing_blobs = dict()
    937 
    +        # Limit size of FindMissingBlobs request
    938 
    +        for required_blobs_group in _grouper(required_blobs, 512):
    939 
    +            request = remote_execution_pb2.FindMissingBlobsRequest()
    940 
    +
    941 
    +            for required_digest in required_blobs_group:
    942 
    +                d = request.blob_digests.add()
    943 
    +                d.hash = required_digest.hash
    944 
    +                d.size_bytes = required_digest.size_bytes
    945 
    +
    946 
    +            response = remote.cas.FindMissingBlobs(request)
    947 
    +            for missing_digest in response.missing_blob_digests:
    948 
    +                d = remote_execution_pb2.Digest()
    949 
    +                d.hash = missing_digest.hash
    950 
    +                d.size_bytes = missing_digest.size_bytes
    951 
    +                missing_blobs[d.hash] = d
    952 
    +
    953 
    +        # Upload any blobs missing on the server
    954 
    +        for blob_digest in missing_blobs.values():
    955 
    +            with open(self.objpath(blob_digest), 'rb') as f:
    956 
    +                assert os.fstat(f.fileno()).st_size == blob_digest.size_bytes
    957 
    +                self._send_blob(remote, blob_digest, f, u_uid=u_uid)
    958 
    +
    830 959
    831 960 
     # Represents a single remote CAS cache.
    832 961 
     #

  • buildstream/_project.py
    ... ... @@ -128,6 +128,7 @@ class Project():
    128 128 
             self._shell_host_files = []   # A list of HostMount objects
    129 129
    130 130 
             self.artifact_cache_specs = None
    131 
    +        self.remote_execution_url = None
    131 132 
             self._sandbox = None
    132 133 
             self._splits = None
    133 134
    ... ... @@ -471,7 +472,7 @@ class Project():
    471 472 
                 'aliases', 'name',
    472 473 
                 'artifacts', 'options',
    473 474 
                 'fail-on-overlap', 'shell', 'fatal-warnings',
    474 
    -            'ref-storage', 'sandbox', 'mirrors'
    475 
    +            'ref-storage', 'sandbox', 'mirrors', 'remote-execution'
    475 476 
             ])
    476 477
    477 478 
             #
    ... ... @@ -482,6 +483,11 @@ class Project():
    482 483 
             # Load artifacts pull/push configuration for this project
    483 484 
             self.artifact_cache_specs = ArtifactCache.specs_from_config_node(config, self.directory)
    484 485
    486 
    +        # Load remote-execution configuration for this project
    487 
    +        remote_execution = _yaml.node_get(config, Mapping, 'remote-execution')
    488 
    +        _yaml.node_validate(remote_execution, ['url'])
    489 
    +        self.remote_execution_url = _yaml.node_get(remote_execution, str, 'url')
    490 
    +
    485 491 
             # Load sandbox environment variables
    486 492 
             self.base_environment = _yaml.node_get(config, Mapping, 'environment')
    487 493 
             self.base_env_nocache = _yaml.node_get(config, list, 'environment-nocache')

  • buildstream/buildelement.py
    ... ... @@ -155,6 +155,9 @@ class BuildElement(Element):
    155 155 
                 command_dir = build_root
    156 156 
             sandbox.set_work_directory(command_dir)
    157 157
    158 
    +        # Tell sandbox which directory is preserved in the finished artifact
    159 
    +        sandbox.set_output_directory(install_root)
    160 
    +
    158 161 
             # Setup environment
    159 162 
             sandbox.set_environment(self.get_environment())
    160 163

  • buildstream/data/projectconfig.yaml
    ... ... @@ -204,3 +204,6 @@ shell:
    204 204 
       # Command to run when `bst shell` does not provide a command
    205 205 
       #
    206 206 
       command: [ 'sh', '-i' ]
    207 
    +
    208 
    +remote-execution:
    209 
    +  url: ""
    \ No newline at end of file

  • buildstream/element.py
    ... ... @@ -95,6 +95,7 @@ from . import _site
    95 95 
     from ._platform import Platform
    96 96 
     from .plugin import CoreWarnings
    97 97 
     from .sandbox._config import SandboxConfig
    98 
    +from .sandbox._sandboxremote import SandboxRemote
    98 99
    99 100 
     from .storage.directory import Directory
    100 101 
     from .storage._filebaseddirectory import FileBasedDirectory
    ... ... @@ -250,6 +251,12 @@ class Element(Plugin):
    250 251 
             # Extract Sandbox config
    251 252 
             self.__sandbox_config = self.__extract_sandbox_config(meta)
    252 253
    254 
    +        # Extract remote execution URL
    255 
    +        if not self.__is_junction:
    256 
    +            self.__remote_execution_url = project.remote_execution_url
    257 
    +        else:
    258 
    +            self.__remote_execution_url = None
    259 
    +
    253 260 
         def __lt__(self, other):
    254 261 
             return self.name < other.name
    255 262
    ... ... @@ -1570,6 +1577,8 @@ class Element(Plugin):
    1570 1577 
                     finally:
    1571 1578 
                         if collect is not None:
    1572 1579 
                             try:
    1580 
    +                            # Sandbox will probably have replaced its virtual directory, so get it again
    1581 
    +                            sandbox_vroot = sandbox.get_virtual_directory()
    1573 1582 
                                 collectvdir = sandbox_vroot.descend(collect.lstrip(os.sep).split(os.sep))
    1574 1583 
                             except VirtualDirectoryError:
    1575 1584 
                                 # No collect directory existed
    ... ... @@ -2146,7 +2155,32 @@ class Element(Plugin):
    2146 2155 
             project = self._get_project()
    2147 2156 
             platform = Platform.get_platform()
    2148 2157
    2149 
    -        if directory is not None and os.path.exists(directory):
    2158 
    +        if self.__remote_execution_url and self.BST_VIRTUAL_DIRECTORY:
    2159 
    +            if not self.__artifacts.has_push_remotes(element=self):
    2160 
    +                # Give an early warning if remote execution will not work
    2161 
    +                raise ElementError("Artifact {} is configured to use remote execution but has no push remotes. "
    2162 
    +                                   .format(self.name) +
    2163 
    +                                   "The remote artifact server(s) may not be correctly configured or contactable.")
    2164 
    +
    2165 
    +            self.info("Using a remote sandbox for artifact {}".format(self.name))
    2166 
    +
    2167 
    +            sandbox = SandboxRemote(context, project,
    2168 
    +                                    directory,
    2169 
    +                                    stdout=stdout,
    2170 
    +                                    stderr=stderr,
    2171 
    +                                    config=config,
    2172 
    +                                    server_url=self.__remote_execution_url,
    2173 
    +                                    allow_real_directory=False)
    2174 
    +            yield sandbox
    2175 
    +
    2176 
    +        elif directory is not None and os.path.exists(directory):
    2177 
    +            if self.__remote_execution_url:
    2178 
    +                self.warn("Artifact {} is configured to use remote execution but element plugin does not support it."
    2179 
    +                          .format(self.name), detail="Element plugin '{kind}' does not support virtual directories."
    2180 
    +                          .format(kind=self.get_kind()), warning_token="remote-failure")
    2181 
    +
    2182 
    +                self.info("Falling back to local sandbox for artifact {}".format(self.name))
    2183 
    +
    2150 2184 
                 sandbox = platform.create_sandbox(context, project,
    2151 2185 
                                                   directory,
    2152 2186 
                                                   stdout=stdout,

  • buildstream/plugins/elements/autotools.py
    ... ... @@ -57,7 +57,8 @@ from buildstream import BuildElement
    57 57
    58 58 
     # Element implementation for the 'autotools' kind.
    59 59 
     class AutotoolsElement(BuildElement):
    60 
    -    pass
    60 
    +    # Supports virtual directories (required for remote execution)
    61 
    +    BST_VIRTUAL_DIRECTORY = True
    61 62
    62 63
    63 64 
     # Plugin entry point

  • buildstream/plugins/elements/cmake.py
    ... ... @@ -56,7 +56,8 @@ from buildstream import BuildElement
    56 56
    57 57 
     # Element implementation for the 'cmake' kind.
    58 58 
     class CMakeElement(BuildElement):
    59 
    -    pass
    59 
    +    # Supports virtual directories (required for remote execution)
    60 
    +    BST_VIRTUAL_DIRECTORY = True
    60 61
    61 62
    62 63 
     # Plugin entry point

  • buildstream/plugins/elements/make.py
    ... ... @@ -38,7 +38,8 @@ from buildstream import BuildElement
    38 38
    39 39 
     # Element implementation for the 'make' kind.
    40 40 
     class MakeElement(BuildElement):
    41 
    -    pass
    41 
    +    # Supports virtual directories (required for remote execution)
    42 
    +    BST_VIRTUAL_DIRECTORY = True
    42 43
    43 44
    44 45 
     # Plugin entry point

  • buildstream/plugins/elements/meson.py
    ... ... @@ -53,7 +53,8 @@ from buildstream import BuildElement
    53 53
    54 54 
     # Element implementation for the 'meson' kind.
    55 55 
     class MesonElement(BuildElement):
    56 
    -    pass
    56 
    +    # Supports virtual directories (required for remote execution)
    57 
    +    BST_VIRTUAL_DIRECTORY = True
    57 58
    58 59
    59 60 
     # Plugin entry point

  • buildstream/plugins/elements/qmake.py
    ... ... @@ -33,7 +33,8 @@ from buildstream import BuildElement
    33 33
    34 34 
     # Element implementation for the 'qmake' kind.
    35 35 
     class QMakeElement(BuildElement):
    36 
    -    pass
    36 
    +    # Supports virtual directories (required for remote execution)
    37 
    +    BST_VIRTUAL_DIRECTORY = True
    37 38
    38 39
    39 40 
     # Plugin entry point

  • buildstream/sandbox/__init__.py
    ... ... @@ -20,3 +20,4 @@
    20 20 
     from .sandbox import Sandbox, SandboxFlags
    21 21 
     from ._sandboxchroot import SandboxChroot
    22 22 
     from ._sandboxbwrap import SandboxBwrap
    23 
    +from ._sandboxremote import SandboxRemote

  • buildstream/sandbox/_sandboxremote.py
    1 
    +#!/usr/bin/env python3
    2 
    +#
    3 
    +#  Copyright (C) 2018 Bloomberg LP
    4 
    +#
    5 
    +#  This program is free software; you can redistribute it and/or
    6 
    +#  modify it under the terms of the GNU Lesser General Public
    7 
    +#  License as published by the Free Software Foundation; either
    8 
    +#  version 2 of the License, or (at your option) any later version.
    9 
    +#
    10 
    +#  This library is distributed in the hope that it will be useful,
    11 
    +#  but WITHOUT ANY WARRANTY; without even the implied warranty of
    12 
    +#  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.	 See the GNU
    13 
    +#  Lesser General Public License for more details.
    14 
    +#
    15 
    +#  You should have received a copy of the GNU Lesser General Public
    16 
    +#  License along with this library. If not, see <http://www.gnu.org/licenses/>.
    17 
    +#
    18 
    +#  Authors:
    19 
    +#        Jim MacArthur <jim macarthur codethink co uk>
    20 
    +
    21 
    +import os
    22 
    +from urllib.parse import urlparse
    23 
    +
    24 
    +import grpc
    25 
    +
    26 
    +from . import Sandbox
    27 
    +from ..storage._filebaseddirectory import FileBasedDirectory
    28 
    +from ..storage._casbaseddirectory import CasBasedDirectory
    29 
    +from .._protos.build.bazel.remote.execution.v2 import remote_execution_pb2, remote_execution_pb2_grpc
    30 
    +from .._artifactcache.cascache import CASCache
    31 
    +
    32 
    +
    33 
    +class SandboxError(Exception):
    34 
    +    pass
    35 
    +
    36 
    +
    37 
    +# SandboxRemote()
    38 
    +#
    39 
    +# This isn't really a sandbox, it's a stub which sends all the sources and build
    40 
    +# commands to a remote server and retrieves the results from it.
    41 
    +#
    42 
    +class SandboxRemote(Sandbox):
    43 
    +
    44 
    +    def __init__(self, *args, **kwargs):
    45 
    +        super().__init__(*args, **kwargs)
    46 
    +        self.cascache = None
    47 
    +
    48 
    +        url = urlparse(kwargs['server_url'])
    49 
    +        if not url.scheme or not url.hostname or not url.port:
    50 
    +            raise SandboxError("Configured remote URL '{}' does not match the expected layout. "
    51 
    +                               .format(kwargs['server_url']) +
    52 
    +                               "It should be of the form <protocol>://<domain name>:<port>.")
    53 
    +        elif url.scheme != 'http':
    54 
    +            raise SandboxError("Configured remote '{}' uses an unsupported protocol. "
    55 
    +                               "Only plain HTTP is currenlty supported (no HTTPS).")
    56 
    +
    57 
    +        self.server_url = '{}:{}'.format(url.hostname, url.port)
    58 
    +
    59 
    +    def _get_cascache(self):
    60 
    +        if self.cascache is None:
    61 
    +            self.cascache = CASCache(self._get_context())
    62 
    +            self.cascache.setup_remotes(use_config=True)
    63 
    +        return self.cascache
    64 
    +
    65 
    +    def run_remote_command(self, command, input_root_digest, working_directory, environment):
    66 
    +        # Sends an execution request to the remote execution server.
    67 
    +        #
    68 
    +        # This function blocks until it gets a response from the server.
    69 
    +        #
    70 
    +        environment_variables = [remote_execution_pb2.Command.
    71 
    +                                 EnvironmentVariable(name=k, value=v)
    72 
    +                                 for (k, v) in environment.items()]
    73 
    +
    74 
    +        # Create and send the Command object.
    75 
    +        remote_command = remote_execution_pb2.Command(arguments=command,
    76 
    +                                                      working_directory=working_directory,
    77 
    +                                                      environment_variables=environment_variables,
    78 
    +                                                      output_files=[],
    79 
    +                                                      output_directories=[self._output_directory],
    80 
    +                                                      platform=None)
    81 
    +
    82 
    +        cascache = self._get_cascache()
    83 
    +        # Upload the Command message to the remote CAS server
    84 
    +        command_digest = cascache.push_message(self._get_project(), remote_command)
    85 
    +        if not command_digest or not cascache.verify_digest_pushed(self._get_project(), command_digest):
    86 
    +            # Command push failed
    87 
    +            return None
    88 
    +
    89 
    +        # Create and send the action.
    90 
    +        action = remote_execution_pb2.Action(command_digest=command_digest,
    91 
    +                                             input_root_digest=input_root_digest,
    92 
    +                                             timeout=None,
    93 
    +                                             do_not_cache=False)
    94 
    +
    95 
    +        # Upload the Action message to the remote CAS server
    96 
    +        action_digest = cascache.push_message(self._get_project(), action)
    97 
    +        if not action_digest or not cascache.verify_digest_pushed(self._get_project(), action_digest):
    98 
    +            # Action push failed
    99 
    +            return None
    100 
    +
    101 
    +        # Next, try to create a communication channel to the BuildGrid server.
    102 
    +        channel = grpc.insecure_channel(self.server_url)
    103 
    +        stub = remote_execution_pb2_grpc.ExecutionStub(channel)
    104 
    +        request = remote_execution_pb2.ExecuteRequest(action_digest=action_digest,
    105 
    +                                                      skip_cache_lookup=False)
    106 
    +        try:
    107 
    +            operation_iterator = stub.Execute(request)
    108 
    +        except grpc.RpcError:
    109 
    +            return None
    110 
    +
    111 
    +        operation = None
    112 
    +        with self._get_context().timed_activity("Waiting for the remote build to complete"):
    113 
    +            # It is advantageous to check operation_iterator.code() is grpc.StatusCode.OK here,
    114 
    +            # which will check the server is actually contactable. However, calling it when the
    115 
    +            # server is available seems to cause .code() to hang forever.
    116 
    +            for operation in operation_iterator:
    117 
    +                if operation.done:
    118 
    +                    break
    119 
    +
    120 
    +        return operation
    121 
    +
    122 
    +    def process_job_output(self, output_directories, output_files):
    123 
    +        # Reads the remote execution server response to an execution request.
    124 
    +        #
    125 
    +        # output_directories is an array of OutputDirectory objects.
    126 
    +        # output_files is an array of OutputFile objects.
    127 
    +        #
    128 
    +        # We only specify one output_directory, so it's an error
    129 
    +        # for there to be any output files or more than one directory at the moment.
    130 
    +        #
    131 
    +        if output_files:
    132 
    +            raise SandboxError("Output files were returned when we didn't request any.")
    133 
    +        elif not output_directories:
    134 
    +            error_text = "No output directory was returned from the build server."
    135 
    +            raise SandboxError(error_text)
    136 
    +        elif len(output_directories) > 1:
    137 
    +            error_text = "More than one output directory was returned from the build server: {}."
    138 
    +            raise SandboxError(error_text.format(output_directories))
    139 
    +
    140 
    +        tree_digest = output_directories[0].tree_digest
    141 
    +        if tree_digest is None or not tree_digest.hash:
    142 
    +            raise SandboxError("Output directory structure had no digest attached.")
    143 
    +
    144 
    +        cascache = self._get_cascache()
    145 
    +        # Now do a pull to ensure we have the necessary parts.
    146 
    +        dir_digest = cascache.pull_tree(self._get_project(), tree_digest)
    147 
    +        if dir_digest is None or not dir_digest.hash or not dir_digest.size_bytes:
    148 
    +            raise SandboxError("Output directory structure pulling from remote failed.")
    149 
    +
    150 
    +        path_components = os.path.split(self._output_directory)
    151 
    +
    152 
    +        # Now what we have is a digest for the output. Once we return, the calling process will
    153 
    +        # attempt to descend into our directory and find that directory, so we need to overwrite
    154 
    +        # that.
    155 
    +
    156 
    +        if not path_components:
    157 
    +            # The artifact wants the whole directory; we could just return the returned hash in its
    158 
    +            # place, but we don't have a means to do that yet.
    159 
    +            raise SandboxError("Unimplemented: Output directory is empty or equal to the sandbox root.")
    160 
    +
    161 
    +        # At the moment, we will get the whole directory back in the first directory argument and we need
    162 
    +        # to replace the sandbox's virtual directory with that. Creating a new virtual directory object
    163 
    +        # from another hash will be interesting, though...
    164 
    +
    165 
    +        new_dir = CasBasedDirectory(self._get_context(), ref=dir_digest)
    166 
    +        self._set_virtual_directory(new_dir)
    167 
    +
    168 
    +    def run(self, command, flags, *, cwd=None, env=None):
    169 
    +        # Upload sources
    170 
    +        upload_vdir = self.get_virtual_directory()
    171 
    +
    172 
    +        if isinstance(upload_vdir, FileBasedDirectory):
    173 
    +            # Make a new temporary directory to put source in
    174 
    +            upload_vdir = CasBasedDirectory(self._get_context(), ref=None)
    175 
    +            upload_vdir.import_files(self.get_virtual_directory()._get_underlying_directory())
    176 
    +
    177 
    +        upload_vdir.recalculate_hash()
    178 
    +
    179 
    +        cascache = self._get_cascache()
    180 
    +        # Now, push that key (without necessarily needing a ref) to the remote.
    181 
    +        vdir_digest = cascache.push_directory(self._get_project(), upload_vdir)
    182 
    +        if not vdir_digest or not cascache.verify_digest_pushed(self._get_project(), vdir_digest):
    183 
    +            raise SandboxError("Failed to verify that source has been pushed to the remote artifact cache.")
    184 
    +
    185 
    +        # Set up environment and working directory
    186 
    +        if cwd is None:
    187 
    +            cwd = self._get_work_directory()
    188 
    +
    189 
    +        if cwd is None:
    190 
    +            cwd = '/'
    191 
    +
    192 
    +        if env is None:
    193 
    +            env = self._get_environment()
    194 
    +
    195 
    +        # We want command args as a list of strings
    196 
    +        if isinstance(command, str):
    197 
    +            command = [command]
    198 
    +
    199 
    +        # Now transmit the command to execute
    200 
    +        operation = self.run_remote_command(command, upload_vdir.ref, cwd, env)
    201 
    +
    202 
    +        if operation is None:
    203 
    +            # Failure of remote execution, usually due to an error in BuildStream
    204 
    +            # NB This error could be raised in __run_remote_command
    205 
    +            raise SandboxError("No response returned from server")
    206 
    +
    207 
    +        assert not operation.HasField('error') and operation.HasField('response')
    208 
    +
    209 
    +        execution_response = remote_execution_pb2.ExecuteResponse()
    210 
    +        # The response is expected to be an ExecutionResponse message
    211 
    +        assert operation.response.Is(execution_response.DESCRIPTOR)
    212 
    +
    213 
    +        operation.response.Unpack(execution_response)
    214 
    +
    215 
    +        if execution_response.status.code != 0:
    216 
    +            # A normal error during the build: the remote execution system
    217 
    +            # has worked correctly but the command failed.
    218 
    +            # execution_response.error also contains 'message' (str) and
    219 
    +            # 'details' (iterator of Any) which we ignore at the moment.
    220 
    +            return execution_response.status.code
    221 
    +
    222 
    +        action_result = execution_response.result
    223 
    +
    224 
    +        self.process_job_output(action_result.output_directories, action_result.output_files)
    225 
    +
    226 
    +        return 0

  • buildstream/sandbox/sandbox.py
    ... ... @@ -99,9 +99,11 @@ class Sandbox():
    99 99 
             self.__stdout = kwargs['stdout']
    100 100 
             self.__stderr = kwargs['stderr']
    101 101
    102 
    -        # Setup the directories. Root should be available to subclasses, hence
    103 
    -        # being single-underscore. The others are private to this class.
    102 
    +        # Setup the directories. Root and output_directory should be
    103 
    +        # available to subclasses, hence being single-underscore. The
    104 
    +        # others are private to this class.
    104 105 
             self._root = os.path.join(directory, 'root')
    106 
    +        self._output_directory = None
    105 107 
             self.__directory = directory
    106 108 
             self.__scratch = os.path.join(self.__directory, 'scratch')
    107 109 
             for directory_ in [self._root, self.__scratch]:
    ... ... @@ -144,11 +146,17 @@ class Sandbox():
    144 146 
                     self._vdir = FileBasedDirectory(self._root)
    145 147 
             return self._vdir
    146 148
    149 
    +    def _set_virtual_directory(self, virtual_directory):
    150 
    +        """ Sets virtual directory. Useful after remote execution
    151 
    +        has rewritten the working directory.
    152 
    +        """
    153 
    +        self._vdir = virtual_directory
    154 
    +
    147 155 
         def set_environment(self, environment):
    148 156 
             """Sets the environment variables for the sandbox
    149 157
    150 158 
             Args:
    151 
    -           directory (dict): The environment variables to use in the sandbox
    159 
    +           environment (dict): The environment variables to use in the sandbox
    152 160 
             """
    153 161 
             self.__env = environment
    154 162
    ... ... @@ -160,6 +168,15 @@ class Sandbox():
    160 168 
             """
    161 169 
             self.__cwd = directory
    162 170
    171 
    +    def set_output_directory(self, directory):
    172 
    +        """Sets the output directory - the directory which is preserved
    173 
    +        as an artifact after assembly.
    174 
    +
    175 
    +        Args:
    176 
    +           directory (str): An absolute path within the sandbox
    177 
    +        """
    178 
    +        self._output_directory = directory
    179 
    +
    163 180 
         def mark_directory(self, directory, *, artifact=False):
    164 181 
             """Marks a sandbox directory and ensures it will exist
    165 182

  • buildstream/storage/_casbaseddirectory.py
    ... ... @@ -543,6 +543,15 @@ class CasBasedDirectory(Directory):
    543 543 
                     filelist.append(k)
    544 544 
             return filelist
    545 545
    546 
    +    def recalculate_hash(self):
    547 
    +        """ Recalcuates the hash for this directory and store the results in
    548 
    +        the cache. If this directory has a parent, tell it to
    549 
    +        recalculate (since changing this directory changes an entry in
    550 
    +        the parent). Hashes for subdirectories also get recalculated.
    551 
    +        """
    552 
    +        self._recalculate_recursing_up()
    553 
    +        self._recalculate_recursing_down()
    554 
    +
    546 555 
         def _get_identifier(self):
    547 556 
             path = ""
    548 557 
             if self.parent:

  • doc/source/format_project.rst
    ... ... @@ -204,6 +204,24 @@ with an artifact share.
    204 204 
     You can also specify a list of caches here; earlier entries in the list
    205 205 
     will have higher priority than later ones.
    206 206
    207 
    +Remote execution
    208 
    +~~~~~~~~~~~~~~~~
    209 
    +BuildStream supports remote execution using the Google Remote Execution API
    210 
    +(REAPI). A description of how remote execution works is beyond the scope
    211 
    +of this document, but you can specify a remote server complying with the REAPI
    212 
    +using the `remote-execution` option:
    213 
    +
    214 
    +.. code:: yaml
    215 
    +
    216 
    +  remote-execution:
    217 
    +
    218 
    +    # A url defining a remote execution server
    219 
    +    url: http://buildserver.example.com:50051
    220 
    +
    221 
    +The url should contain a hostname and port separated by ':'. Only plain HTTP is
    222 
    +currently suported (no HTTPS).
    223 
    +
    224 
    +The Remote Execution API can be found via https://github.com/bazelbuild/remote-apis.
    207 225
    208 226 
     .. _project_essentials_mirrors:
    209 227

  • tests/artifactcache/project/elements/compose-all.bst
    1 
    +kind: compose
    2 
    +
    3 
    +depends:
    4 
    +- filename: import-bin.bst
    5 
    +  type: build
    6 
    +- filename: import-dev.bst
    7 
    +  type: build
    8 
    +
    9 
    +config:
    10 
    +  # Dont try running the sandbox, we dont have a
    11 
    +  # runtime to run anything in this context.
    12 
    +  integrate: False

  • tests/artifactcache/project/elements/import-bin.bst
    1 
    +kind: import
    2 
    +sources:
    3 
    +- kind: local
    4 
    +  path: files/bin-files

  • tests/artifactcache/project/elements/import-dev.bst
    1 
    +kind: import
    2 
    +sources:
    3 
    +- kind: local
    4 
    +  path: files/dev-files

  • tests/artifactcache/project/elements/target.bst
    1 
    +kind: stack
    2 
    +description: |
    3 
    +
    4 
    +  Main stack target for the bst build test
    5 
    +
    6 
    +depends:
    7 
    +- import-bin.bst
    8 
    +- import-dev.bst
    9 
    +- compose-all.bst

  • tests/artifactcache/project/files/bin-files/usr/bin/hello
    1 
    +#!/bin/bash
    2 
    +
    3 
    +echo "Hello !"

  • tests/artifactcache/project/files/dev-files/usr/include/pony.h
    1 
    +#ifndef __PONY_H__
    2 
    +#define __PONY_H__
    3 
    +
    4 
    +#define PONY_BEGIN "Once upon a time, there was a pony."
    5 
    +#define PONY_END "And they lived happily ever after, the end."
    6 
    +
    7 
    +#define MAKE_PONY(story)  \
    8 
    +  PONY_BEGIN \
    9 
    +  story \
    10 
    +  PONY_END
    11 
    +
    12 
    +#endif /* __PONY_H__ */

  • tests/artifactcache/project/project.conf
    1 
    +# Project config for frontend build test
    2 
    +name: test
    3 
    +
    4 
    +element-path: elements

  • tests/artifactcache/pull.py
    1 
    +import hashlib
    2 
    +import multiprocessing
    3 
    +import os
    4 
    +import signal
    5 
    +
    6 
    +import pytest
    7 
    +
    8 
    +from buildstream import _yaml, _signals, utils
    9 
    +from buildstream._artifactcache.cascache import CASCache
    10 
    +from buildstream._context import Context
    11 
    +from buildstream._project import Project
    12 
    +from buildstream._protos.build.bazel.remote.execution.v2 import remote_execution_pb2
    13 
    +
    14 
    +from tests.testutils import cli, create_artifact_share
    15 
    +
    16 
    +
    17 
    +# Project directory
    18 
    +DATA_DIR = os.path.join(
    19 
    +    os.path.dirname(os.path.realpath(__file__)),
    20 
    +    "project",
    21 
    +)
    22 
    +
    23 
    +
    24 
    +# Handle messages from the pipeline
    25 
    +def message_handler(message, context):
    26 
    +    pass
    27 
    +
    28 
    +
    29 
    +def tree_maker(cas, tree, directory):
    30 
    +    if tree.root.ByteSize() == 0:
    31 
    +        tree.root.CopyFrom(directory)
    32 
    +
    33 
    +    for directory_node in directory.directories:
    34 
    +        child_directory = tree.children.add()
    35 
    +
    36 
    +        with open(cas.objpath(directory_node.digest), 'rb') as f:
    37 
    +            child_directory.ParseFromString(f.read())
    38 
    +
    39 
    +        tree_maker(cas, tree, child_directory)
    40 
    +
    41 
    +
    42 
    +@pytest.mark.datafiles(DATA_DIR)
    43 
    +def test_pull(cli, tmpdir, datafiles):
    44 
    +    project_dir = str(datafiles)
    45 
    +
    46 
    +    # Set up an artifact cache.
    47 
    +    with create_artifact_share(os.path.join(str(tmpdir), 'artifactshare')) as share:
    48 
    +        # Configure artifact share
    49 
    +        artifact_dir = os.path.join(str(tmpdir), 'cache', 'artifacts')
    50 
    +        user_config_file = str(tmpdir.join('buildstream.conf'))
    51 
    +        user_config = {
    52 
    +            'scheduler': {
    53 
    +                'pushers': 1
    54 
    +            },
    55 
    +            'artifacts': {
    56 
    +                'url': share.repo,
    57 
    +                'push': True,
    58 
    +            }
    59 
    +        }
    60 
    +
    61 
    +        # Write down the user configuration file
    62 
    +        _yaml.dump(_yaml.node_sanitize(user_config), filename=user_config_file)
    63 
    +        # Ensure CLI calls will use it
    64 
    +        cli.configure(user_config)
    65 
    +
    66 
    +        # First build the project with the artifact cache configured
    67 
    +        result = cli.run(project=project_dir, args=['build', 'target.bst'])
    68 
    +        result.assert_success()
    69 
    +
    70 
    +        # Assert that we are now cached locally
    71 
    +        assert cli.get_element_state(project_dir, 'target.bst') == 'cached'
    72 
    +        # Assert that we shared/pushed the cached artifact
    73 
    +        element_key = cli.get_element_key(project_dir, 'target.bst')
    74 
    +        assert share.has_artifact('test', 'target.bst', element_key)
    75 
    +
    76 
    +        # Delete the artifact locally
    77 
    +        cli.remove_artifact_from_cache(project_dir, 'target.bst')
    78 
    +
    79 
    +        # Assert that we are not cached locally anymore
    80 
    +        assert cli.get_element_state(project_dir, 'target.bst') != 'cached'
    81 
    +
    82 
    +        # Fake minimal context
    83 
    +        context = Context()
    84 
    +        context.load(config=user_config_file)
    85 
    +        context.artifactdir = os.path.join(str(tmpdir), 'cache', 'artifacts')
    86 
    +        context.set_message_handler(message_handler)
    87 
    +
    88 
    +        # Load the project and CAS cache
    89 
    +        project = Project(project_dir, context)
    90 
    +        project.ensure_fully_loaded()
    91 
    +        cas = CASCache(context)
    92 
    +
    93 
    +        # Assert that the element's artifact is **not** cached
    94 
    +        element = project.load_elements(['target.bst'], cas)[0]
    95 
    +        element_key = cli.get_element_key(project_dir, 'target.bst')
    96 
    +        assert not cas.contains(element, element_key)
    97 
    +
    98 
    +        queue = multiprocessing.Queue()
    99 
    +        # Use subprocess to avoid creation of gRPC threads in main BuildStream process
    100 
    +        # See https://github.com/grpc/grpc/blob/master/doc/fork_support.md for details
    101 
    +        process = multiprocessing.Process(target=_test_pull,
    102 
    +                                          args=(user_config_file, project_dir, artifact_dir,
    103 
    +                                                'target.bst', element_key, queue))
    104 
    +
    105 
    +        try:
    106 
    +            # Keep SIGINT blocked in the child process
    107 
    +            with _signals.blocked([signal.SIGINT], ignore=False):
    108 
    +                process.start()
    109 
    +
    110 
    +            error = queue.get()
    111 
    +            process.join()
    112 
    +        except KeyboardInterrupt:
    113 
    +            utils._kill_process_tree(process.pid)
    114 
    +            raise
    115 
    +
    116 
    +        assert not error
    117 
    +        assert cas.contains(element, element_key)
    118 
    +
    119 
    +
    120 
    +def _test_pull(user_config_file, project_dir, artifact_dir,
    121 
    +               element_name, element_key, queue):
    122 
    +    # Fake minimal context
    123 
    +    context = Context()
    124 
    +    context.load(config=user_config_file)
    125 
    +    context.artifactdir = artifact_dir
    126 
    +    context.set_message_handler(message_handler)
    127 
    +
    128 
    +    # Load the project manually
    129 
    +    project = Project(project_dir, context)
    130 
    +    project.ensure_fully_loaded()
    131 
    +
    132 
    +    # Create a local CAS cache handle
    133 
    +    cas = CASCache(context)
    134 
    +
    135 
    +    # Load the target element
    136 
    +    element = project.load_elements([element_name], cas)[0]
    137 
    +
    138 
    +    # Manually setup the CAS remote
    139 
    +    cas.setup_remotes(use_config=True)
    140 
    +    cas.initialize_remotes()
    141 
    +
    142 
    +    if cas.has_push_remotes(element=element):
    143 
    +        # Push the element's artifact
    144 
    +        if not cas.pull(element, element_key):
    145 
    +            queue.put("Pull operation failed")
    146 
    +        else:
    147 
    +            queue.put(None)
    148 
    +    else:
    149 
    +        queue.put("No remote configured for element {}".format(element_name))
    150 
    +
    151 
    +
    152 
    +@pytest.mark.datafiles(DATA_DIR)
    153 
    +def test_pull_tree(cli, tmpdir, datafiles):
    154 
    +    project_dir = str(datafiles)
    155 
    +
    156 
    +    # Set up an artifact cache.
    157 
    +    with create_artifact_share(os.path.join(str(tmpdir), 'artifactshare')) as share:
    158 
    +        # Configure artifact share
    159 
    +        artifact_dir = os.path.join(str(tmpdir), 'cache', 'artifacts')
    160 
    +        user_config_file = str(tmpdir.join('buildstream.conf'))
    161 
    +        user_config = {
    162 
    +            'scheduler': {
    163 
    +                'pushers': 1
    164 
    +            },
    165 
    +            'artifacts': {
    166 
    +                'url': share.repo,
    167 
    +                'push': True,
    168 
    +            }
    169 
    +        }
    170 
    +
    171 
    +        # Write down the user configuration file
    172 
    +        _yaml.dump(_yaml.node_sanitize(user_config), filename=user_config_file)
    173 
    +        # Ensure CLI calls will use it
    174 
    +        cli.configure(user_config)
    175 
    +
    176 
    +        # First build the project with the artifact cache configured
    177 
    +        result = cli.run(project=project_dir, args=['build', 'target.bst'])
    178 
    +        result.assert_success()
    179 
    +
    180 
    +        # Assert that we are now cached locally
    181 
    +        assert cli.get_element_state(project_dir, 'target.bst') == 'cached'
    182 
    +        # Assert that we shared/pushed the cached artifact
    183 
    +        element_key = cli.get_element_key(project_dir, 'target.bst')
    184 
    +        assert share.has_artifact('test', 'target.bst', element_key)
    185 
    +
    186 
    +        # Fake minimal context
    187 
    +        context = Context()
    188 
    +        context.load(config=user_config_file)
    189 
    +        context.artifactdir = os.path.join(str(tmpdir), 'cache', 'artifacts')
    190 
    +        context.set_message_handler(message_handler)
    191 
    +
    192 
    +        # Load the project and CAS cache
    193 
    +        project = Project(project_dir, context)
    194 
    +        project.ensure_fully_loaded()
    195 
    +        cas = CASCache(context)
    196 
    +
    197 
    +        # Assert that the element's artifact is cached
    198 
    +        element = project.load_elements(['target.bst'], cas)[0]
    199 
    +        element_key = cli.get_element_key(project_dir, 'target.bst')
    200 
    +        assert cas.contains(element, element_key)
    201 
    +
    202 
    +        # Retrieve the Directory object from the cached artifact
    203 
    +        artifact_ref = cas.get_artifact_fullname(element, element_key)
    204 
    +        artifact_digest = cas.resolve_ref(artifact_ref)
    205 
    +
    206 
    +        queue = multiprocessing.Queue()
    207 
    +        # Use subprocess to avoid creation of gRPC threads in main BuildStream process
    208 
    +        # See https://github.com/grpc/grpc/blob/master/doc/fork_support.md for details
    209 
    +        process = multiprocessing.Process(target=_test_push_tree,
    210 
    +                                          args=(user_config_file, project_dir, artifact_dir,
    211 
    +                                                artifact_digest, queue))
    212 
    +
    213 
    +        try:
    214 
    +            # Keep SIGINT blocked in the child process
    215 
    +            with _signals.blocked([signal.SIGINT], ignore=False):
    216 
    +                process.start()
    217 
    +
    218 
    +            tree_hash, tree_size = queue.get()
    219 
    +            process.join()
    220 
    +        except KeyboardInterrupt:
    221 
    +            utils._kill_process_tree(process.pid)
    222 
    +            raise
    223 
    +
    224 
    +        assert tree_hash and tree_size
    225 
    +
    226 
    +        # Now delete the artifact locally
    227 
    +        cli.remove_artifact_from_cache(project_dir, 'target.bst')
    228 
    +
    229 
    +        # Assert that we are not cached locally anymore
    230 
    +        assert cli.get_element_state(project_dir, 'target.bst') != 'cached'
    231 
    +
    232 
    +        tree_digest = remote_execution_pb2.Digest(hash=tree_hash,
    233 
    +                                                  size_bytes=tree_size)
    234 
    +
    235 
    +        queue = multiprocessing.Queue()
    236 
    +        # Use subprocess to avoid creation of gRPC threads in main BuildStream process
    237 
    +        process = multiprocessing.Process(target=_test_pull_tree,
    238 
    +                                          args=(user_config_file, project_dir, artifact_dir,
    239 
    +                                                tree_digest, queue))
    240 
    +
    241 
    +        try:
    242 
    +            # Keep SIGINT blocked in the child process
    243 
    +            with _signals.blocked([signal.SIGINT], ignore=False):
    244 
    +                process.start()
    245 
    +
    246 
    +            directory_hash, directory_size = queue.get()
    247 
    +            process.join()
    248 
    +        except KeyboardInterrupt:
    249 
    +            utils._kill_process_tree(process.pid)
    250 
    +            raise
    251 
    +
    252 
    +        assert directory_hash and directory_size
    253 
    +
    254 
    +        directory_digest = remote_execution_pb2.Digest(hash=directory_hash,
    255 
    +                                                       size_bytes=directory_size)
    256 
    +
    257 
    +        # Ensure the entire Tree stucture has been pulled
    258 
    +        assert os.path.exists(cas.objpath(directory_digest))
    259 
    +
    260 
    +
    261 
    +def _test_push_tree(user_config_file, project_dir, artifact_dir, artifact_digest, queue):
    262 
    +    # Fake minimal context
    263 
    +    context = Context()
    264 
    +    context.load(config=user_config_file)
    265 
    +    context.artifactdir = artifact_dir
    266 
    +    context.set_message_handler(message_handler)
    267 
    +
    268 
    +    # Load the project manually
    269 
    +    project = Project(project_dir, context)
    270 
    +    project.ensure_fully_loaded()
    271 
    +
    272 
    +    # Create a local CAS cache handle
    273 
    +    cas = CASCache(context)
    274 
    +
    275 
    +    # Manually setup the CAS remote
    276 
    +    cas.setup_remotes(use_config=True)
    277 
    +    cas.initialize_remotes()
    278 
    +
    279 
    +    if cas.has_push_remotes():
    280 
    +        directory = remote_execution_pb2.Directory()
    281 
    +
    282 
    +        with open(cas.objpath(artifact_digest), 'rb') as f:
    283 
    +            directory.ParseFromString(f.read())
    284 
    +
    285 
    +        # Build the Tree object while we are still cached
    286 
    +        tree = remote_execution_pb2.Tree()
    287 
    +        tree_maker(cas, tree, directory)
    288 
    +
    289 
    +        # Push the Tree as a regular message
    290 
    +        tree_digest = cas.push_message(project, tree)
    291 
    +
    292 
    +        queue.put((tree_digest.hash, tree_digest.size_bytes))
    293 
    +    else:
    294 
    +        queue.put("No remote configured")
    295 
    +
    296 
    +
    297 
    +def _test_pull_tree(user_config_file, project_dir, artifact_dir, artifact_digest, queue):
    298 
    +    # Fake minimal context
    299 
    +    context = Context()
    300 
    +    context.load(config=user_config_file)
    301 
    +    context.artifactdir = artifact_dir
    302 
    +    context.set_message_handler(message_handler)
    303 
    +
    304 
    +    # Load the project manually
    305 
    +    project = Project(project_dir, context)
    306 
    +    project.ensure_fully_loaded()
    307 
    +
    308 
    +    # Create a local CAS cache handle
    309 
    +    cas = CASCache(context)
    310 
    +
    311 
    +    # Manually setup the CAS remote
    312 
    +    cas.setup_remotes(use_config=True)
    313 
    +    cas.initialize_remotes()
    314 
    +
    315 
    +    if cas.has_push_remotes():
    316 
    +        # Pull the artifact using the Tree object
    317 
    +        directory_digest = cas.pull_tree(project, artifact_digest)
    318 
    +        queue.put((directory_digest.hash, directory_digest.size_bytes))
    319 
    +    else:
    320 
    +        queue.put("No remote configured")

  • tests/artifactcache/push.py
    1 
    +import multiprocessing
    2 
    +import os
    3 
    +import signal
    4 
    +
    5 
    +import pytest
    6 
    +
    7 
    +from pluginbase import PluginBase
    8 
    +from buildstream import _yaml, _signals, utils
    9 
    +from buildstream._artifactcache.cascache import CASCache
    10 
    +from buildstream._context import Context
    11 
    +from buildstream._project import Project
    12 
    +from buildstream._protos.build.bazel.remote.execution.v2 import remote_execution_pb2
    13 
    +from buildstream.storage._casbaseddirectory import CasBasedDirectory
    14 
    +
    15 
    +from tests.testutils import cli, create_artifact_share
    16 
    +
    17 
    +
    18 
    +# Project directory
    19 
    +DATA_DIR = os.path.join(
    20 
    +    os.path.dirname(os.path.realpath(__file__)),
    21 
    +    "project",
    22 
    +)
    23 
    +
    24 
    +
    25 
    +# Handle messages from the pipeline
    26 
    +def message_handler(message, context):
    27 
    +    pass
    28 
    +
    29 
    +
    30 
    +@pytest.mark.datafiles(DATA_DIR)
    31 
    +def test_push(cli, tmpdir, datafiles):
    32 
    +    project_dir = str(datafiles)
    33 
    +
    34 
    +    # First build the project without the artifact cache configured
    35 
    +    result = cli.run(project=project_dir, args=['build', 'target.bst'])
    36 
    +    result.assert_success()
    37 
    +
    38 
    +    # Assert that we are now cached locally
    39 
    +    assert cli.get_element_state(project_dir, 'target.bst') == 'cached'
    40 
    +
    41 
    +    # Set up an artifact cache.
    42 
    +    with create_artifact_share(os.path.join(str(tmpdir), 'artifactshare')) as share:
    43 
    +        # Configure artifact share
    44 
    +        artifact_dir = os.path.join(str(tmpdir), 'cache', 'artifacts')
    45 
    +        user_config_file = str(tmpdir.join('buildstream.conf'))
    46 
    +        user_config = {
    47 
    +            'scheduler': {
    48 
    +                'pushers': 1
    49 
    +            },
    50 
    +            'artifacts': {
    51 
    +                'url': share.repo,
    52 
    +                'push': True,
    53 
    +            }
    54 
    +        }
    55 
    +
    56 
    +        # Write down the user configuration file
    57 
    +        _yaml.dump(_yaml.node_sanitize(user_config), filename=user_config_file)
    58 
    +
    59 
    +        # Fake minimal context
    60 
    +        context = Context()
    61 
    +        context.load(config=user_config_file)
    62 
    +        context.artifactdir = artifact_dir
    63 
    +        context.set_message_handler(message_handler)
    64 
    +
    65 
    +        # Load the project manually
    66 
    +        project = Project(project_dir, context)
    67 
    +        project.ensure_fully_loaded()
    68 
    +
    69 
    +        # Create a local CAS cache handle
    70 
    +        cas = CASCache(context)
    71 
    +
    72 
    +        # Assert that the element's artifact is cached
    73 
    +        element = project.load_elements(['target.bst'], cas)[0]
    74 
    +        element_key = cli.get_element_key(project_dir, 'target.bst')
    75 
    +        assert cas.contains(element, element_key)
    76 
    +
    77 
    +        queue = multiprocessing.Queue()
    78 
    +        # Use subprocess to avoid creation of gRPC threads in main BuildStream process
    79 
    +        # See https://github.com/grpc/grpc/blob/master/doc/fork_support.md for details
    80 
    +        process = multiprocessing.Process(target=_test_push,
    81 
    +                                          args=(user_config_file, project_dir, artifact_dir,
    82 
    +                                                'target.bst', element_key, queue))
    83 
    +
    84 
    +        try:
    85 
    +            # Keep SIGINT blocked in the child process
    86 
    +            with _signals.blocked([signal.SIGINT], ignore=False):
    87 
    +                process.start()
    88 
    +
    89 
    +            error = queue.get()
    90 
    +            process.join()
    91 
    +        except KeyboardInterrupt:
    92 
    +            utils._kill_process_tree(process.pid)
    93 
    +            raise
    94 
    +
    95 
    +        assert not error
    96 
    +        assert share.has_artifact('test', 'target.bst', element_key)
    97 
    +
    98 
    +
    99 
    +def _test_push(user_config_file, project_dir, artifact_dir,
    100 
    +               element_name, element_key, queue):
    101 
    +    # Fake minimal context
    102 
    +    context = Context()
    103 
    +    context.load(config=user_config_file)
    104 
    +    context.artifactdir = artifact_dir
    105 
    +    context.set_message_handler(message_handler)
    106 
    +
    107 
    +    # Load the project manually
    108 
    +    project = Project(project_dir, context)
    109 
    +    project.ensure_fully_loaded()
    110 
    +
    111 
    +    # Create a local CAS cache handle
    112 
    +    cas = CASCache(context)
    113 
    +
    114 
    +    # Load the target element
    115 
    +    element = project.load_elements([element_name], cas)[0]
    116 
    +
    117 
    +    # Manually setup the CAS remote
    118 
    +    cas.setup_remotes(use_config=True)
    119 
    +    cas.initialize_remotes()
    120 
    +
    121 
    +    if cas.has_push_remotes(element=element):
    122 
    +        # Push the element's artifact
    123 
    +        if not cas.push(element, [element_key]):
    124 
    +            queue.put("Push operation failed")
    125 
    +        else:
    126 
    +            queue.put(None)
    127 
    +    else:
    128 
    +        queue.put("No remote configured for element {}".format(element_name))
    129 
    +
    130 
    +
    131 
    +@pytest.mark.datafiles(DATA_DIR)
    132 
    +def test_push_directory(cli, tmpdir, datafiles):
    133 
    +    project_dir = str(datafiles)
    134 
    +
    135 
    +    # First build the project without the artifact cache configured
    136 
    +    result = cli.run(project=project_dir, args=['build', 'target.bst'])
    137 
    +    result.assert_success()
    138 
    +
    139 
    +    # Assert that we are now cached locally
    140 
    +    assert cli.get_element_state(project_dir, 'target.bst') == 'cached'
    141 
    +
    142 
    +    # Set up an artifact cache.
    143 
    +    with create_artifact_share(os.path.join(str(tmpdir), 'artifactshare')) as share:
    144 
    +        # Configure artifact share
    145 
    +        artifact_dir = os.path.join(str(tmpdir), 'cache', 'artifacts')
    146 
    +        user_config_file = str(tmpdir.join('buildstream.conf'))
    147 
    +        user_config = {
    148 
    +            'scheduler': {
    149 
    +                'pushers': 1
    150 
    +            },
    151 
    +            'artifacts': {
    152 
    +                'url': share.repo,
    153 
    +                'push': True,
    154 
    +            }
    155 
    +        }
    156 
    +
    157 
    +        # Write down the user configuration file
    158 
    +        _yaml.dump(_yaml.node_sanitize(user_config), filename=user_config_file)
    159 
    +
    160 
    +        # Fake minimal context
    161 
    +        context = Context()
    162 
    +        context.load(config=user_config_file)
    163 
    +        context.artifactdir = os.path.join(str(tmpdir), 'cache', 'artifacts')
    164 
    +        context.set_message_handler(message_handler)
    165 
    +
    166 
    +        # Load the project and CAS cache
    167 
    +        project = Project(project_dir, context)
    168 
    +        project.ensure_fully_loaded()
    169 
    +        cas = CASCache(context)
    170 
    +
    171 
    +        # Assert that the element's artifact is cached
    172 
    +        element = project.load_elements(['target.bst'], cas)[0]
    173 
    +        element_key = cli.get_element_key(project_dir, 'target.bst')
    174 
    +        assert cas.contains(element, element_key)
    175 
    +
    176 
    +        # Manually setup the CAS remote
    177 
    +        cas.setup_remotes(use_config=True)
    178 
    +        cas.initialize_remotes()
    179 
    +        assert cas.has_push_remotes(element=element)
    180 
    +
    181 
    +        # Recreate the CasBasedDirectory object from the cached artifact
    182 
    +        artifact_ref = cas.get_artifact_fullname(element, element_key)
    183 
    +        artifact_digest = cas.resolve_ref(artifact_ref)
    184 
    +
    185 
    +        queue = multiprocessing.Queue()
    186 
    +        # Use subprocess to avoid creation of gRPC threads in main BuildStream process
    187 
    +        # See https://github.com/grpc/grpc/blob/master/doc/fork_support.md for details
    188 
    +        process = multiprocessing.Process(target=_test_push_directory,
    189 
    +                                          args=(user_config_file, project_dir, artifact_dir,
    190 
    +                                                artifact_digest, queue))
    191 
    +
    192 
    +        try:
    193 
    +            # Keep SIGINT blocked in the child process
    194 
    +            with _signals.blocked([signal.SIGINT], ignore=False):
    195 
    +                process.start()
    196 
    +
    197 
    +            directory_hash = queue.get()
    198 
    +            process.join()
    199 
    +        except KeyboardInterrupt:
    200 
    +            utils._kill_process_tree(process.pid)
    201 
    +            raise
    202 
    +
    203 
    +        assert directory_hash
    204 
    +        assert artifact_digest.hash == directory_hash
    205 
    +        assert share.has_object(artifact_digest)
    206 
    +
    207 
    +
    208 
    +def _test_push_directory(user_config_file, project_dir, artifact_dir, artifact_digest, queue):
    209 
    +    # Fake minimal context
    210 
    +    context = Context()
    211 
    +    context.load(config=user_config_file)
    212 
    +    context.artifactdir = artifact_dir
    213 
    +    context.set_message_handler(message_handler)
    214 
    +
    215 
    +    # Load the project manually
    216 
    +    project = Project(project_dir, context)
    217 
    +    project.ensure_fully_loaded()
    218 
    +
    219 
    +    # Create a local CAS cache handle
    220 
    +    cas = CASCache(context)
    221 
    +
    222 
    +    # Manually setup the CAS remote
    223 
    +    cas.setup_remotes(use_config=True)
    224 
    +    cas.initialize_remotes()
    225 
    +
    226 
    +    if cas.has_push_remotes():
    227 
    +        # Create a CasBasedDirectory from local CAS cache content
    228 
    +        directory = CasBasedDirectory(context, ref=artifact_digest)
    229 
    +
    230 
    +        # Push the CasBasedDirectory object
    231 
    +        directory_digest = cas.push_directory(project, directory)
    232 
    +
    233 
    +        queue.put(directory_digest.hash)
    234 
    +    else:
    235 
    +        queue.put("No remote configured")
    236 
    +
    237 
    +
    238 
    +@pytest.mark.datafiles(DATA_DIR)
    239 
    +def test_push_message(cli, tmpdir, datafiles):
    240 
    +    project_dir = str(datafiles)
    241 
    +
    242 
    +    # Set up an artifact cache.
    243 
    +    with create_artifact_share(os.path.join(str(tmpdir), 'artifactshare')) as share:
    244 
    +        # Configure artifact share
    245 
    +        artifact_dir = os.path.join(str(tmpdir), 'cache', 'artifacts')
    246 
    +        user_config_file = str(tmpdir.join('buildstream.conf'))
    247 
    +        user_config = {
    248 
    +            'scheduler': {
    249 
    +                'pushers': 1
    250 
    +            },
    251 
    +            'artifacts': {
    252 
    +                'url': share.repo,
    253 
    +                'push': True,
    254 
    +            }
    255 
    +        }
    256 
    +
    257 
    +        # Write down the user configuration file
    258 
    +        _yaml.dump(_yaml.node_sanitize(user_config), filename=user_config_file)
    259 
    +
    260 
    +        queue = multiprocessing.Queue()
    261 
    +        # Use subprocess to avoid creation of gRPC threads in main BuildStream process
    262 
    +        # See https://github.com/grpc/grpc/blob/master/doc/fork_support.md for details
    263 
    +        process = multiprocessing.Process(target=_test_push_message,
    264 
    +                                          args=(user_config_file, project_dir, artifact_dir, queue))
    265 
    +
    266 
    +        try:
    267 
    +            # Keep SIGINT blocked in the child process
    268 
    +            with _signals.blocked([signal.SIGINT], ignore=False):
    269 
    +                process.start()
    270 
    +
    271 
    +            message_hash, message_size = queue.get()
    272 
    +            process.join()
    273 
    +        except KeyboardInterrupt:
    274 
    +            utils._kill_process_tree(process.pid)
    275 
    +            raise
    276 
    +
    277 
    +        assert message_hash and message_size
    278 
    +        message_digest = remote_execution_pb2.Digest(hash=message_hash,
    279 
    +                                                     size_bytes=message_size)
    280 
    +        assert share.has_object(message_digest)
    281 
    +
    282 
    +
    283 
    +def _test_push_message(user_config_file, project_dir, artifact_dir, queue):
    284 
    +    # Fake minimal context
    285 
    +    context = Context()
    286 
    +    context.load(config=user_config_file)
    287 
    +    context.artifactdir = artifact_dir
    288 
    +    context.set_message_handler(message_handler)
    289 
    +
    290 
    +    # Load the project manually
    291 
    +    project = Project(project_dir, context)
    292 
    +    project.ensure_fully_loaded()
    293 
    +
    294 
    +    # Create a local CAS cache handle
    295 
    +    cas = CASCache(context)
    296 
    +
    297 
    +    # Manually setup the CAS remote
    298 
    +    cas.setup_remotes(use_config=True)
    299 
    +    cas.initialize_remotes()
    300 
    +
    301 
    +    if cas.has_push_remotes():
    302 
    +        # Create an example message object
    303 
    +        command = remote_execution_pb2.Command(arguments=['/usr/bin/gcc', '--help'],
    304 
    +                                               working_directory='/buildstream-build',
    305 
    +                                               output_directories=['/buildstream-install'])
    306 
    +
    307 
    +        # Push the message object
    308 
    +        command_digest = cas.push_message(project, command)
    309 
    +
    310 
    +        queue.put((command_digest.hash, command_digest.size_bytes))
    311 
    +    else:
    312 
    +        queue.put("No remote configured")

  • tests/testutils/artifactshare.py
    ... ... @@ -15,6 +15,7 @@ from buildstream._artifactcache.cascache import CASCache
    15 15 
     from buildstream._artifactcache.casserver import create_server
    16 16 
     from buildstream._context import Context
    17 17 
     from buildstream._exceptions import ArtifactError
    18 
    +from buildstream._protos.build.bazel.remote.execution.v2 import remote_execution_pb2
    18 19
    19 20
    20 21 
     # ArtifactShare()
    ... ... @@ -87,6 +88,23 @@ class ArtifactShare():
    87 88 
             # Sleep until termination by signal
    88 89 
             signal.pause()
    89 90
    91 
    +    # has_object():
    92 
    +    #
    93 
    +    # Checks whether the object is present in the share
    94 
    +    #
    95 
    +    # Args:
    96 
    +    #    digest (str): The object's digest
    97 
    +    #
    98 
    +    # Returns:
    99 
    +    #    (bool): True if the object exists in the share, otherwise false.
    100 
    +    def has_object(self, digest):
    101 
    +
    102 
    +        assert isinstance(digest, remote_execution_pb2.Digest)
    103 
    +
    104 
    +        object_path = self.cas.objpath(digest)
    105 
    +
    106 
    +        return os.path.exists(object_path)
    107 
    +
    90 108 
         # has_artifact():
    91 109 
         #
    92 110 
         # Checks whether the artifact is present in the share

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