# Copyright 2021 The CUE 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
#
#     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.

# The copybara configuration for the cuelang/cue repository
#
# When used in conjunction with the cueckoo/copybara Docker image this
# configuration can be run in two modes:
#
#     github
#     github-pr N
#
# The first mode mirrors Gerrit to GitHub. The second mode imports PR #N from
# GitHub to Gerrit.
#
# See the CUE-defined copybara workflow defined in internal/ci for an example
# of how to pass in Gerrit and GitHub credentials when running an instance of
# the cueckoo/copybara image.

github_url = "https://github.com/cuelang/cue.git"
gerrit_url = "https://cue-review.googlesource.com/cue"

origin_github_pr = git.github_pr_origin(
        baseline_from_branch = True,
        use_merge = True,
        url = github_url,
        )

origin_gerrit = git.origin(
        url = gerrit_url,
        ref = "master",
        )

destination_gerrit = git.gerrit_destination(
        url = gerrit_url,
        fetch = "master",
        push_to_refs_for = "master%hashtag=github-pr",
        )

# Mirror from Gerrit -> GitHub
git.mirror(
        name = "github",
        origin = gerrit_url,
        destination = github_url,
        refspecs = ["refs/*"],
        prune = False,
        )

# Import a PR from GitHub to Gerrit
core.workflow(
        name = "github-pr",
        origin = origin_github_pr,
        destination = destination_gerrit,
        authoring = authoring.pass_thru("CUE team <no-reply@google.com>"),
        transformations = [
            metadata.replace_message(
                "${GITHUB_PR_TITLE}\n\n" +
                "${GITHUB_PR_BODY}\n\n" +
                "Closes #${GITHUB_PR_NUMBER}\n" +
                "https://github.com/cuelang/cue/pull/${GITHUB_PR_NUMBER}",
                ),
            ],
        mode = "CHANGE_REQUEST",
        )