| # Copyright 2021 The Bazel Authors. All rights reserved. |
| # |
| # Licensed under the Apache License, Version 2.0 (the "License"); |
| # you may not use this file except in compliance with the License. |
| # You may obtain a copy of the License at |
| # |
| # http://www.apache.org/licenses/LICENSE-2.0 |
| # |
| # Unless required by applicable law or agreed to in writing, software |
| # distributed under the License is distributed on an "AS IS" BASIS, |
| # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| # See the License for the specific language governing permissions and |
| # limitations under the License. |
| """Get BUILD_TIMESTAMP.""" |
| |
| |
| def get_timestamp(volatile_status_file): |
| """Get BUILD_TIMESTAMP as an integer. |
| |
| Reads a file of "name<space>value" pairs and returns the value |
| of the BUILD_TIMESTAMP. The file should be in the workspace status |
| format: https://docs.bazel.build/versions/master/user-manual.html#workspace_status |
| |
| Args: |
| volatile_status_file: path to input file. Typically ctx.version_file.path. |
| Returns: |
| int: value of BUILD_TIMESTAMP |
| Exceptions: |
| Exception: Raised if there is no BUILD_TIMESTAMP or if it is not a number. |
| """ |
| with open(volatile_status_file, 'r') as status_f: |
| for line in status_f: |
| parts = line.strip().split(' ') |
| if len(parts) > 1 and parts[0] == 'BUILD_TIMESTAMP': |
| return int(parts[1]) |
| raise Exception( |
| "Invalid status file <%s>. Expected to find BUILD_TIMESTAMP" % volatile_status_file) |