blob: 46a759a335584447929b20ada671ce440952034f [file] [log] [blame]
// Copyright 2017 The LUCI 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.
package notify
import (
"context"
"net/http"
"time"
"go.chromium.org/luci/common/api/gitiles"
"go.chromium.org/luci/common/errors"
"go.chromium.org/luci/common/logging"
gitpb "go.chromium.org/luci/common/proto/git"
gitilespb "go.chromium.org/luci/common/proto/gitiles"
"go.chromium.org/luci/grpc/grpcutil"
"go.chromium.org/luci/server/auth"
)
// HistoryFunc is a function that gets a list of commits from Gitiles for a
// specific repository, between oldRevision and newRevision, inclusive.
//
// If oldRevision is not reachable from newRevision, returns an empty slice
// and nil error.
type HistoryFunc func(ctx context.Context, luciProject, gerritHost, gerritProject, oldRevision, newRevision string) ([]*gitpb.Commit, error)
// gitilesHistory is an implementation of a HistoryFunc intended to be used
// in production (not for testing).
func gitilesHistory(ctx context.Context, luciProject, gerritHost, gerritProject, oldRevision, newRevision string) ([]*gitpb.Commit, error) {
ctx, cancel := context.WithTimeout(ctx, 30*time.Second)
defer cancel()
opts := []auth.RPCOption{
auth.WithProject(luciProject),
auth.WithScopes(gitiles.OAuthScope),
}
transport, err := auth.GetRPCTransport(ctx, auth.AsProject, opts...)
if err != nil {
return nil, errors.Annotate(err, "getting RPC Transport").Err()
}
client, err := gitiles.NewRESTClient(&http.Client{Transport: transport}, gerritHost, true)
if err != nil {
return nil, errors.Annotate(err, "creating Gitiles client").Err()
}
req := gitilespb.LogRequest{
Project: gerritProject,
// With ~1, if newCommit.Revision == oldRevision,
// we'll get one commit,
// otherwise we will get 0 commits which is indistinguishable from
// oldRevision not being reachable from newRevision.
ExcludeAncestorsOf: oldRevision + "~1",
Committish: newRevision,
}
logging.Infof(ctx, "Gitiles request to host %q: %q", gerritHost, &req)
res, err := gitiles.PagingLog(ctx, client, req, 0)
switch {
case err != nil:
return nil, grpcutil.WrapIfTransient(errors.Annotate(err, "fetching commit from Gitiles").Err())
case len(res) > 0 && res[0].Id != newRevision: // Sanity check.
return nil, errors.Reason("gitiles returned inconsistent results").Err()
default:
return res, nil
}
}