recipe_modules/build/api.py

# Copyright 2021 The Pigweed Authors
#
# 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
#
#     https://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.
"""Calls to build code."""

from recipe_engine import recipe_api


class BuildApi(recipe_api.RecipeApi):
    """Calls to build code."""

    CAS_DIGEST_PROPERTY_NAME = 'cas_build_digest'

    def __init__(self, props, *args, **kwargs):
        super(BuildApi, self).__init__(*args, **kwargs)
        # Make these attributes public so recipes can override them.
        self.gn_args = list(props.gn_args)
        self.ninja_targets = list(props.ninja_targets)
        self.dir = None

    def initialize(self):
        self.dir = self.m.path['start_dir'].join('build')

    def gn_gen(self, checkout_dir):
        cmd = ['gn', 'gen']

        for gn_arg in self.gn_args:
            cmd.append('--args={}'.format(gn_arg))

        # Infrequently needed but harmless to always add this.
        cmd.append('--export-compile-commands')

        cmd.append(self.dir)

        with self.m.context(cwd=checkout_dir):
            self.m.step('gn gen', cmd)

    def get_gn_args(self, checkout_root=None, test_data=None):
        context_kwargs = {'cwd': checkout_root} if checkout_root else {}
        with self.m.context(**context_kwargs):
            cmd = ['gn', 'args', self.dir, '--list', '--json']
            args = self.m.step(
                'all gn args',
                cmd,
                stdout=self.m.json.output(),
                step_test_data=lambda: self.m.json.test_api.output_stream(
                    test_data or []
                ),
            ).stdout
            return {x['name']: x for x in args or ()}

    def ninja(self):
        cmd = ['ninja', '-C', self.dir]
        cmd.extend(self.ninja_targets)

        self.m.step('ninja', cmd)

    def __call__(self, checkout_dir):
        self.gn_gen(checkout_dir)
        self.ninja()

    def archive_to_cas(self):
        # TODO(pwbug/389) Only archive necessary files.
        with self.m.step.nest('archive to cas') as pres:
            digest = self.m.cas.archive('archive', self.dir, self.dir)
            pres.properties[self.CAS_DIGEST_PROPERTY_NAME] = digest

    def download_from_cas(self, digest):
        return self.m.cas.download('download from cas', digest, self.dir)