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[Notes] [Git][BuildGrid/buildgrid][mablanch/61-bazel-support] 7 commits: Removed old action_cache.py file

Title: GitLab

Martin Blanchard pushed to branch mablanch/61-bazel-support at BuildGrid / buildgrid

Commits:

4 changed files:

Changes:

  • buildgrid/_app/bots/temp_directory.py
    ... ... @@ -19,7 +19,7 @@ import tempfile
    19 19
    20 20 
     from google.protobuf import any_pb2
    21 21
    22 
    -from buildgrid.utils import read_file, create_digest, write_fetch_directory, parse_to_pb2_from_fetch
    22 
    +from buildgrid.utils import output_file_maker, write_fetch_directory, parse_to_pb2_from_fetch
    23 23 
     from buildgrid._protos.build.bazel.remote.execution.v2 import remote_execution_pb2, remote_execution_pb2_grpc
    24 24 
     from buildgrid._protos.google.bytestream import bytestream_pb2_grpc
    25 25
    ... ... @@ -35,54 +35,81 @@ def work_temp_directory(context, lease):
    35 35 
         action_digest = remote_execution_pb2.Digest()
    36 36 
         lease.payload.Unpack(action_digest)
    37 37
    38 
    -    action = remote_execution_pb2.Action()
    38 
    +    action = parse_to_pb2_from_fetch(remote_execution_pb2.Action(),
    39 
    +                                     stub_bytestream, action_digest, instance_name)
    39 40
    40 
    -    action = parse_to_pb2_from_fetch(action, stub_bytestream, action_digest, instance_name)
    41 
    +    with tempfile.TemporaryDirectory() as temp_directory:
    41 42
    42 
    -    with tempfile.TemporaryDirectory() as temp_dir:
    43 
    +        command = parse_to_pb2_from_fetch(remote_execution_pb2.Command(),
    44 
    +                                          stub_bytestream, action.command_digest, instance_name)
    43 45
    44 
    -        command = remote_execution_pb2.Command()
    45 
    -        command = parse_to_pb2_from_fetch(command, stub_bytestream, action.command_digest, instance_name)
    46 
    +        write_fetch_directory(temp_directory, stub_bytestream,
    47 
    +                              action.input_root_digest, instance_name)
    46 48
    47 
    -        arguments = "cd {} &&".format(temp_dir)
    49 
    +        execution_envionment = os.environ.copy()
    50 
    +        for variable in command.environment_variables:
    51 
    +            if variable.name not in ['PATH', 'PWD']:
    52 
    +                execution_envionment[variable.name] = variable.value
    48 53
    54 
    +        command_arguments = list()
    49 55 
             for argument in command.arguments:
    50 
    -            arguments += " {}".format(argument)
    51 
    -
    52 
    -        context.logger.info(arguments)
    53 
    -
    54 
    -        write_fetch_directory(temp_dir, stub_bytestream, action.input_root_digest, instance_name)
    55 
    -
    56 
    -        proc = subprocess.Popen(arguments,
    57 
    -                                shell=True,
    58 
    -                                stdin=subprocess.PIPE,
    59 
    -                                stdout=subprocess.PIPE)
    60 
    -
    61 
    -        # TODO: Should return the std_out to the user
    62 
    -        proc.communicate()
    63 
    -
    64 
    -        result = remote_execution_pb2.ActionResult()
    65 
    -        requests = []
    66 
    -        for output_file in command.output_files:
    67 
    -            path = os.path.join(temp_dir, output_file)
    68 
    -            chunk = read_file(path)
    69 
    -
    70 
    -            digest = create_digest(chunk)
    71 
    -
    72 
    -            result.output_files.extend([remote_execution_pb2.OutputFile(path=output_file,
    73 
    -                                                                        digest=digest)])
    74 
    -
    75 
    -            requests.append(remote_execution_pb2.BatchUpdateBlobsRequest.Request(
    76 
    -                digest=digest, data=chunk))
    77 
    -
    78 
    -        request = remote_execution_pb2.BatchUpdateBlobsRequest(instance_name=instance_name,
    79 
    -                                                               requests=requests)
    56 
    +            command_arguments.append(argument.strip())
    57 
    +
    58 
    +        working_directory = None
    59 
    +        if command.working_directory:
    60 
    +            working_directory = os.path.join(temp_directory,
    61 
    +                                             command.working_directory)
    62 
    +            os.makedirs(working_directory, exist_ok=True)
    63 
    +        else:
    64 
    +            working_directory = temp_directory
    65 
    +
    66 
    +        # Ensure that output files structure exists:
    67 
    +        for output_path in command.output_files:
    68 
    +            directory_path = os.path.join(working_directory,
    69 
    +                                          os.path.dirname(output_path))
    70 
    +            os.makedirs(directory_path, exist_ok=True)
    71 
    +
    72 
    +        process = subprocess.Popen(command_arguments,
    73 
    +                                   cwd=working_directory,
    74 
    +                                   universal_newlines=True,
    75 
    +                                   env=execution_envionment,
    76 
    +                                   stdin=subprocess.PIPE,
    77 
    +                                   stdout=subprocess.PIPE)
    78 
    +        # TODO: Should return the stdout and stderr to the user.
    79 
    +        process.communicate()
    80 
    +
    81 
    +        update_requests = remote_execution_pb2.BatchUpdateBlobsRequest(instance_name=instance_name)
    82 
    +        action_result = remote_execution_pb2.ActionResult()
    83 
    +
    84 
    +        for output_path in command.output_files:
    85 
    +            file_path = os.path.join(working_directory, output_path)
    86 
    +            # Missing outputs should simply be omitted in ActionResult:
    87 
    +            if not os.path.isfile(file_path):
    88 
    +                continue
    89 
    +
    90 
    +            # OutputFile.path should be relative to the working direcory:
    91 
    +            output_file, update_request = output_file_maker(file_path, working_directory)
    92 
    +
    93 
    +            action_result.output_files.extend([output_file])
    94 
    +            update_requests.requests.extend([update_request])
    95 
    +
    96 
    +        for output_path in command.output_directories:
    97 
    +            directory_path = os.path.join(working_directory, output_path)
    98 
    +            # Missing outputs should simply be omitted in ActionResult:
    99 
    +            if not os.path.isdir(directory_path):
    100 
    +                continue
    101 
    +
    102 
    +            # OutputDirectory.path should be relative to the working direcory:
    103 
    +            output_directory, update_request = output_directory_maker(directory_path, working_directory)
    104 
    +
    105 
    +            action_result.output_directories.extend([output_directory])
    106 
    +            update_requests.requests.extend(update_request)
    80 107
    81 108 
             stub_cas = remote_execution_pb2_grpc.ContentAddressableStorageStub(context.channel)
    82 
    -        stub_cas.BatchUpdateBlobs(request)
    109 
    +        stub_cas.BatchUpdateBlobs(update_requests)
    83 110
    84 111 
             result_any = any_pb2.Any()
    85 
    -        result_any.Pack(result)
    112 
    +        result_any.Pack(action_result)
    86 113
    87 114 
             lease.result.CopyFrom(result_any)
    88 115

  • buildgrid/server/action_cache.py deleted
    1 
    -# Copyright (C) 2018 Bloomberg LP
    2 
    -#
    3 
    -# Licensed under the Apache License, Version 2.0 (the "License");
    4 
    -# you may not use this file except in compliance with the License.
    5 
    -# You may obtain a copy of the License at
    6 
    -#
    7 
    -#  <http://www.apache.org/licenses/LICENSE-2.0>
    8 
    -#
    9 
    -# Unless required by applicable law or agreed to in writing, software
    10 
    -# distributed under the License is distributed on an "AS IS" BASIS,
    11 
    -# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    12 
    -# See the License for the specific language governing permissions and
    13 
    -# limitations under the License.
    14 
    -
    15 
    -
    16 
    -"""
    17 
    -ActionCache
    18 
    -===========
    19 
    -
    20 
    -Implements a simple in-memory action cache.
    21 
    -
    22 
    -The action cache maps Action to their corresponding ActionResult. An
    23 
    -ActionResult may be found in cache, for any given Action, if that action has
    24 
    -already been executed.
    25 
    -
    26 
    -Note:
    27 
    -    Action and ActionResult are referenced by their Digest and mapping is stored
    28 
    -    in-memory.
    29 
    -"""
    30 
    -
    31 
    -import collections
    32 
    -
    33 
    -from buildgrid._protos.build.bazel.remote.execution.v2 import remote_execution_pb2 as re_pb2
    34 
    -
    35 
    -
    36 
    -class ActionCache:
    37 
    -    """In-memory Action to ActionResult associative array.
    38 
    -    """
    39 
    -
    40 
    -    def __init__(self, storage, max_cached_actions):
    41 
    -        """Initialises a new ActionCache instance.
    42 
    -
    43 
    -        Args:
    44 
    -            storage (StorageABC): storage backend instance to be used.
    45 
    -            max_cached_actions (int): maximun number of entries to cache.
    46 
    -        """
    47 
    -        self._storage = storage
    48 
    -        self._max_cached_actions = max_cached_actions
    49 
    -        self._digest_map = collections.OrderedDict()
    50 
    -
    51 
    -    def get_action_result(self, action_digest):
    52 
    -        """Retrieves the cached ActionResult for the given Action digest.
    53 
    -
    54 
    -        Args:
    55 
    -            action_digest (Digest): digest of the Action to query.
    56 
    -
    57 
    -        Returns:
    58 
    -            The cached ActionResult matching the given Action digest or None if
    59 
    -            the nothing hass been cached yet for that Action.
    60 
    -        """
    61 
    -        key = (action_digest.hash, action_digest.size_bytes)
    62 
    -        if key in self._digest_map:
    63 
    -            action_result = self._storage.get_message(self._digest_map[key],
    64 
    -                                                      re_pb2.ActionResult)
    65 
    -            if action_result is not None:
    66 
    -                if self._blobs_still_exist(action_result):
    67 
    -                    self._digest_map.move_to_end(key)
    68 
    -                    return action_result
    69 
    -            del self._digest_map[key]
    70 
    -        return None
    71 
    -
    72 
    -    def put_action_result(self, action_digest, action_result):
    73 
    -        """Stores an ActionResult in cache for the given Action digest.
    74 
    -
    75 
    -        If the cache size limit has been reached, the oldest cache entries will
    76 
    -        be dropped before insertion so that the cache size never exceeds the
    77 
    -        maximum numbers of entries allowed.
    78 
    -
    79 
    -        Args:
    80 
    -            action_digest (Digest): digest of the Action to select.
    81 
    -            action_result (ActionResult): result object to store.
    82 
    -        """
    83 
    -        if self._max_cached_actions == 0:
    84 
    -            return
    85 
    -
    86 
    -        while len(self._digest_map) >= self._max_cached_actions:
    87 
    -            self._digest_map.popitem(last=False)
    88 
    -
    89 
    -        key = (action_digest.hash, action_digest.size_bytes)
    90 
    -        action_result_digest = self._storage.put_message(action_result)
    91 
    -        self._digest_map[key] = action_result_digest
    92 
    -
    93 
    -    def _blobs_still_exist(self, action_result):
    94 
    -        """Checks CAS for ActionResult output blobs existance.
    95 
    -
    96 
    -        Args:
    97 
    -            action_result (ActionResult): ActionResult to search referenced
    98 
    -                output blobs for.
    99 
    -
    100 
    -        Returns:
    101 
    -            True if all referenced blobs are present in CAS, False otherwise.
    102 
    -        """
    103 
    -        blobs_needed = []
    104 
    -
    105 
    -        for output_file in action_result.output_files:
    106 
    -            blobs_needed.append(output_file.digest)
    107 
    -
    108 
    -        for output_directory in action_result.output_directories:
    109 
    -            blobs_needed.append(output_directory.tree_digest)
    110 
    -            tree = self._storage.get_message(output_directory.tree_digest,
    111 
    -                                             re_pb2.Tree)
    112 
    -            if tree is None:
    113 
    -                return False
    114 
    -            for file_node in tree.root.files:
    115 
    -                blobs_needed.append(file_node.digest)
    116 
    -            for child in tree.children:
    117 
    -                for file_node in child.files:
    118 
    -                    blobs_needed.append(file_node.digest)
    119 
    -
    120 
    -        if action_result.stdout_digest.hash and not action_result.stdout_raw:
    121 
    -            blobs_needed.append(action_result.stdout_digest)
    122 
    -        if action_result.stderr_digest.hash and not action_result.stderr_raw:
    123 
    -            blobs_needed.append(action_result.stderr_digest)
    124 
    -
    125 
    -        missing = self._storage.missing_blobs(blobs_needed)
    126 
    -        return len(missing) == 0

  • buildgrid/server/scheduler.py
    ... ... @@ -90,7 +90,7 @@ class Scheduler:
    90 90 
             job.update_execute_stage(ExecuteStage.COMPLETED)
    91 91 
             self.jobs[name] = job
    92 92 
             if not job.do_not_cache and self._action_cache is not None:
    93 
    -            self._action_cache.put_action_result(job.action_digest, result)
    93 
    +            self._action_cache.update_action_result(job.action_digest, result)
    94 94
    95 95 
         def get_operations(self):
    96 96 
             response = operations_pb2.ListOperationsResponse()

  • buildgrid/utils.py
    ... ... @@ -13,6 +13,7 @@
    13 13 
     # limitations under the License.
    14 14
    15 15
    16 
    +from operator import attrgetter
    16 17 
     import os
    17 18
    18 19 
     from buildgrid.settings import HASH
    ... ... @@ -31,30 +32,59 @@ def gen_fetch_blob(stub, digest, instance_name=""):
    31 32 
             yield response.data
    32 33
    33 34
    34 
    -def write_fetch_directory(directory, stub, digest, instance_name=""):
    35 
    -    """ Given a directory digest, fetches files and writes them to a directory
    35 
    +def write_fetch_directory(root_directory, stub, digest, instance_name=None):
    36 
    +    """Locally replicates a directory from CAS.
    37 
    +
    38 
    +    Args:
    39 
    +        root_directory (str): local directory to populate.
    40 
    +        stub (): gRPC stub for CAS communication.
    41 
    +        digest (Digest): digest for the directory to fetch from CAS.
    42 
    +        instance_name (str, optional): farm instance name to query data from.
    36 43 
         """
    37 
    -    # TODO: Extend to symlinks and inner directories
    38 
    -    # pathlib.Path('/my/directory').mkdir(parents=True, exist_ok=True)
    44 
    +    if not os.path.isabs(root_directory):
    45 
    +        root_directory = os.path.abspath(root_directory)
    46 
    +    if not os.path.exists(root_directory):
    47 
    +        os.makedirs(root_directory, exist_ok=True)
    39 48
    40 
    -    directory_pb2 = remote_execution_pb2.Directory()
    41 
    -    directory_pb2 = parse_to_pb2_from_fetch(directory_pb2, stub, digest, instance_name)
    49 
    +    directory = parse_to_pb2_from_fetch(remote_execution_pb2.Directory(),
    50 
    +                                        stub, digest, instance_name)
    51 
    +
    52 
    +    for directory_node in directory.directories:
    53 
    +        child_path = os.path.join(root_directory, directory_node.name)
    54 
    +
    55 
    +        write_fetch_directory(child_path, stub, directory_node.digest, instance_name)
    56 
    +
    57 
    +    for file_node in directory.files:
    58 
    +        child_path = os.path.join(root_directory, file_node.name)
    59 
    +
    60 
    +        with open(child_path, 'wb') as child_file:
    61 
    +            write_fetch_blob(child_file, stub, file_node.digest, instance_name)
    62 
    +
    63 
    +    for symlink_node in directory.symlinks:
    64 
    +        child_path = os.path.join(root_directory, symlink_node.name)
    65 
    +
    66 
    +        if os.path.isabs(symlink_node.target):
    67 
    +            continue  # No out of temp-directory links for now.
    68 
    +        target_path = os.path.join(root_directory, symlink_node.target)
    69 
    +
    70 
    +        os.symlink(child_path, target_path)
    42 71
    43 
    -    for file_node in directory_pb2.files:
    44 
    -        path = os.path.join(directory, file_node.name)
    45 
    -        with open(path, 'wb') as f:
    46 
    -            write_fetch_blob(f, stub, file_node.digest, instance_name)
    47 72
    73 
    +def write_fetch_blob(target_file, stub, digest, instance_name=None):
    74 
    +    """Extracts a blob from CAS into a local file.
    48 75
    49 
    -def write_fetch_blob(out, stub, digest, instance_name=""):
    50 
    -    """ Given an output buffer, fetches blob and writes to buffer
    76 
    +    Args:
    77 
    +        target_file (str): local file to write.
    78 
    +        stub (): gRPC stub for CAS communication.
    79 
    +        digest (Digest): digest for the blob to fetch from CAS.
    80 
    +        instance_name (str, optional): farm instance name to query data from.
    51 81 
         """
    52 82
    53 83 
         for stream in gen_fetch_blob(stub, digest, instance_name):
    54 
    -        out.write(stream)
    84 
    +        target_file.write(stream)
    85 
    +    target_file.flush()
    55 86
    56 
    -    out.flush()
    57 
    -    assert digest.size_bytes == os.fstat(out.fileno()).st_size
    87 
    +    assert digest.size_bytes == os.fstat(target_file.fileno()).st_size
    58 88
    59 89
    60 90 
     def parse_to_pb2_from_fetch(pb2, stub, digest, instance_name=""):
    ... ... @@ -70,7 +100,15 @@ def parse_to_pb2_from_fetch(pb2, stub, digest, instance_name=""):
    70 100
    71 101
    72 102 
     def create_digest(bytes_to_digest):
    73 
    -    """ Creates a hash based on the hex digest and returns the digest
    103 
    +    """Computes the :obj:`Digest` of a piece of data.
    104 
    +
    105 
    +    The :obj:`Digest` of a data is a function of its hash **and** size.
    106 
    +
    107 
    +    Args:
    108 
    +        bytes_to_digest (bytes): byte data to digest.
    109 
    +
    110 
    +    Returns:
    111 
    +        :obj:`Digest`: The gRPC :obj:`Digest` for the given byte data.
    74 112 
         """
    75 113 
         return remote_execution_pb2.Digest(hash=HASH(bytes_to_digest).hexdigest(),
    76 114 
                                            size_bytes=len(bytes_to_digest))
    ... ... @@ -107,6 +145,183 @@ def file_maker(file_path, file_digest):
    107 145 
                                              is_executable=os.access(file_path, os.X_OK))
    108 146
    109 147
    110 
    -def read_file(read):
    111 
    -    with open(read, 'rb') as f:
    112 
    -        return f.read()
    148 
    +def directory_maker(directory_path):
    149 
    +    """
    150 
    +    """
    151 
    +    if not os.path.isabs(directory_path):
    152 
    +        directory_path = os.path.abspath(directory_path)
    153 
    +
    154 
    +    child_directories = list()
    155 
    +    update_requests = list()
    156 
    +
    157 
    +    files, directories, symlinks = list(), list(), list()
    158 
    +    for directory_entry in os.scandir(directory_path):
    159 
    +        # Create a FileNode and corresponding BatchUpdateBlobsRequest:
    160 
    +        if directory_entry.is_file(follow_symlinks=False):
    161 
    +            node_blob = read_file(directory_entry.path)
    162 
    +            node_digest = create_digest(node_blob)
    163 
    +
    164 
    +            node = remote_execution_pb2.FileNode()
    165 
    +            node.name = directory_entry.name
    166 
    +            node.digest = node_digest
    167 
    +            node.is_executable = os.access(directory_entry.path, os.X_OK)
    168 
    +
    169 
    +            node_request = remote_execution_pb2.BatchUpdateBlobsRequest.Request(digest=node_digest)
    170 
    +            node_request.data = node_blob
    171 
    +
    172 
    +            update_requests.append(node_request)
    173 
    +            files.append(node)
    174 
    +
    175 
    +        # Create a DirectoryNode and corresponding BatchUpdateBlobsRequest:
    176 
    +        elif directory_entry.is_dir(follow_symlinks=False):
    177 
    +            node_directory, node_children, node_requests = directory_maker(directory_entry.path)
    178 
    +
    179 
    +            node = remote_execution_pb2.DirectoryNode()
    180 
    +            node.name = directory_entry.name
    181 
    +            node.digest = node_requests[-1].digest
    182 
    +
    183 
    +            child_directories.extend(node_children)
    184 
    +            child_directories.append(node_directory)
    185 
    +            update_requests.expend(node_requests)
    186 
    +            directories.append(node)
    187 
    +
    188 
    +        # Create a SymlinkNode if necessary;
    189 
    +        elif os.path.islink(directory_entry.path):
    190 
    +            node_target = os.readlink(directory_entry.path)
    191 
    +
    192 
    +            node = remote_execution_pb2.SymlinkNode()
    193 
    +            node.name = directory_entry.name
    194 
    +            node.target = node_target
    195 
    +
    196 
    +            symlinks.append(node)
    197 
    +
    198 
    +    directory = remote_execution_pb2.Directory()
    199 
    +    directory.files.extend(files.sort(key=attrgetter('name'))
    200 
    +    directory.directories.extend(directories.sort(key=attrgetter('name'))
    201 
    +    directory.symlinks.extend(symlinks.sort(key=attrgetter('name'))
    202 
    +
    203 
    +    directory_blob = directory.SerializeToString()
    204 
    +    directory_digest = create_digest(directory_blob)
    205 
    +
    206 
    +    update_request = remote_execution_pb2.BatchUpdateBlobsRequest.Request(digest=directory_digest)
    207 
    +    update_request.data = directory_blob
    208 
    +
    209 
    +    update_requests.append(update_request)
    210 
    +
    211 
    +    return directory, child_directories, update_requests
    212 
    +
    213 
    +
    214 
    +def read_file(file_path):
    215 
    +    """Loads raw file content in memory.
    216 
    +
    217 
    +    Returns:
    218 
    +        bytes: Raw file's content until EOF.
    219 
    +
    220 
    +    Raises:
    221 
    +        OSError: If `file_path` does not exist or is not readable.
    222 
    +    """
    223 
    +    with open(file_path, 'rb') as byte_file:
    224 
    +        return byte_file.read()
    225 
    +
    226 
    +
    227 
    +def output_file_maker(file_path, input_path):
    228 
    +    """Creates an :obj:`OutputFile` from a local file.
    229 
    +
    230 
    +    `file_path` **must** point inside or be relative to `input_path`.
    231 
    +
    232 
    +    Args:
    233 
    +        file_path (str): absolute or relative path to a local file.
    234 
    +        input_path (str): absolute or relative path to the input root directory.
    235 
    +
    236 
    +    Returns:
    237 
    +        :obj:`OutputFile`, :obj:`BatchUpdateBlobsRequest`: Tuple of a new gRPC
    238 
    +        :obj:`OutputFile` object for the file pointed by `file_path` and the
    239 
    +        corresponding :obj:`BatchUpdateBlobsRequest` for CAS upload.
    240 
    +    """
    241 
    +    if not os.path.isabs(file_path):
    242 
    +        file_path = os.path.abspath(file_path)
    243 
    +    if not os.path.isabs(input_path):
    244 
    +        input_path = os.path.abspath(input_path)
    245 
    +
    246 
    +    file_blob = read_file(file_path)
    247 
    +    file_digest = create_digest(file_blob)
    248 
    +
    249 
    +    output_file = remote_execution_pb2.OutputFile(digest=file_digest)
    250 
    +    output_file.path = os.path.relpath(file_path, start=input_path)
    251 
    +    output_file.is_executable = os.access(file_path, os.X_OK)
    252 
    +
    253 
    +    update_request = remote_execution_pb2.BatchUpdateBlobsRequest.Request(digest=file_digest)
    254 
    +    update_request.data = file_blob
    255 
    +
    256 
    +    return output_file, update_request
    257 
    +
    258 
    +
    259 
    +def output_directory_maker(directory_path, working_path):
    260 
    +    """Creates a gRPC :obj:`OutputDirectory` from a local directory.
    261 
    +
    262 
    +    `directory_path` **must** point inside or be relative to `input_path`.
    263 
    +
    264 
    +    Args:
    265 
    +        directory_path (str): absolute or relative path to a local directory.
    266 
    +        working_path (str): absolute or relative path to the working directory.
    267 
    +
    268 
    +    Returns:
    269 
    +        :obj:`OutputDirectory`, :obj:`BatchUpdateBlobsRequest`: Tuple of a new
    270 
    +        gRPC :obj:`OutputDirectory` for the directory pointed by
    271 
    +        `directory_path` and the corresponding list of
    272 
    +        :obj:`BatchUpdateBlobsRequest` for CAS upload.
    273 
    +    """
    274 
    +    if not os.path.isabs(directory_path):
    275 
    +        directory_path = os.path.abspath(directory_path)
    276 
    +    if not os.path.isabs(working_path):
    277 
    +        working_path = os.path.abspath(working_path)
    278 
    +
    279 
    +    tree, update_requests = tree_maker(directory_path)
    280 
    +
    281 
    +    output_directory = remote_execution_pb2.OutputDirectory()
    282 
    +    output_directory.tree_digest = update_requests[-1].digest
    283 
    +    output_directory.path = os.path.relpath(directory_path, start=working_path)
    284 
    +
    285 
    +    output_directory_blob = output_directory.SerializeToString()
    286 
    +    output_directory_digest = create_digest(output_directory_blob)
    287 
    +
    288 
    +    update_request = remote_execution_pb2.BatchUpdateBlobsRequest.Request(digest=output_directory_digest)
    289 
    +    update_request.data = output_directory_blob
    290 
    +
    291 
    +    update_requests.append(update_request)
    292 
    +
    293 
    +    return output_directory, update_requests
    294 
    +
    295 
    +
    296 
    +def tree_maker(directory_path):
    297 
    +    """Creates a gRPC :obj:`Tree` from a local directory.
    298 
    +
    299 
    +    Args:
    300 
    +        directory_path (str): absolute or relative path to a local directory.
    301 
    +
    302 
    +    Returns:
    303 
    +        :obj:`Tree`, :obj:`BatchUpdateBlobsRequest`: Tuple of a new
    304 
    +        gRPC :obj:`Tree` for the directory pointed by `directory_path` and the
    305 
    +        corresponding list of :obj:`BatchUpdateBlobsRequest` for CAS upload.
    306 
    +
    307 
    +        The :obj:`BatchUpdateBlobsRequest` list may come in any order. However,
    308 
    +        its last element is guaranteed to be the :obj:`Tree`'s request.
    309 
    +    """
    310 
    +    if not os.path.isabs(directory_path):
    311 
    +        directory_path = os.path.abspath(directory_path)
    312 
    +
    313 
    +    directory, child_directories, update_requests directory_maker(directory_path)
    314 
    +
    315 
    +    tree = remote_execution_pb2.Tree()
    316 
    +    tree.children.expend([child_directories])
    317 
    +    tree.root = directory
    318 
    +
    319 
    +    tree_blob = tree.SerializeToString()
    320 
    +    tree_digest = create_digest(file_blob)
    321 
    +
    322 
    +    update_request = remote_execution_pb2.BatchUpdateBlobsRequest.Request(digest=tree_digest)
    323 
    +    update_request.data = tree_blob
    324 
    +
    325 
    +    update_requests.append(update_request)
    326 
    +
    327 
    +    return tree, update_requests

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