| // Copyright 2019 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 cli |
| |
| import ( |
| "context" |
| "flag" |
| "fmt" |
| "net/http" |
| "regexp" |
| "strconv" |
| |
| "go.chromium.org/luci/common/api/gerrit" |
| "go.chromium.org/luci/common/sync/parallel" |
| |
| pb "go.chromium.org/luci/buildbucket/proto" |
| luciflag "go.chromium.org/luci/common/flag" |
| gerritpb "go.chromium.org/luci/common/proto/gerrit" |
| ) |
| |
| type clsFlag struct { |
| cls []string |
| } |
| |
| func (f *clsFlag) Register(fs *flag.FlagSet, help string) { |
| fs.Var(luciflag.StringSlice(&f.cls), "cl", help) |
| } |
| |
| const kRequirePatchset = true |
| |
| // retrieveCLs retrieves GerritChange objects from f.cls. |
| // Makes Gerrit RPCs if necessary, in parallel. |
| func (f *clsFlag) retrieveCLs(ctx context.Context, httpClient *http.Client, requirePatchset bool) ([]*pb.GerritChange, error) { |
| ret := make([]*pb.GerritChange, len(f.cls)) |
| return ret, parallel.FanOutIn(func(work chan<- func() error) { |
| for i, cl := range f.cls { |
| i := i |
| cl := cl |
| work <- func() error { |
| change, err := f.retrieveCL(ctx, cl, httpClient, requirePatchset) |
| if err != nil { |
| return fmt.Errorf("CL %q: %s", cl, err) |
| } |
| ret[i] = change |
| return nil |
| } |
| } |
| }) |
| } |
| |
| // retrieveCL retrieves a GerritChange from a string. |
| // Makes a Gerrit RPC if necessary. |
| func (f *clsFlag) retrieveCL(ctx context.Context, cl string, httpClient *http.Client, requirePatchset bool) (*pb.GerritChange, error) { |
| ret, err := parseCL(cl) |
| switch { |
| case err != nil: |
| return nil, err |
| case requirePatchset && ret.Patchset == 0: |
| return nil, fmt.Errorf("missing patchset number") |
| case ret.Project != "" && ret.Patchset != 0: |
| return ret, nil |
| } |
| |
| // Fetch CL info from Gerrit. |
| client, err := gerrit.NewRESTClient(httpClient, ret.Host, true) |
| if err != nil { |
| return nil, err |
| } |
| change, err := client.GetChange(ctx, &gerritpb.GetChangeRequest{ |
| Number: ret.Change, |
| Options: []gerritpb.QueryOption{gerritpb.QueryOption_CURRENT_REVISION}, |
| }) |
| if err != nil { |
| return nil, fmt.Errorf("failed to fetch CL %d from %q: %s", ret.Change, ret.Host, err) |
| } |
| |
| ret.Project = change.Project |
| if ret.Patchset == 0 { |
| ret.Patchset = int64(change.Revisions[change.CurrentRevision].Number) |
| } |
| return ret, nil |
| } |
| |
| var regexCL = regexp.MustCompile(`((\w+-)+review\.googlesource\.com)/(#/)?c/(([^\+]+)/\+/)?(\d+)(/(\d+))?`) |
| var regexCLCRRev = regexp.MustCompile(`crrev\.com/([ci])/(\d+)(/(\d+))?`) |
| |
| // parseCL tries to retrieve a CL info from a string. |
| // |
| // It is not strict and can consume noisy strings, e.g. |
| // https://chromium-review.googlesource.com/c/infra/luci/luci-go/+/1541677/7/buildbucket/cmd/bb/base_command.go |
| // or incomplete strings, e.g. |
| // https://chromium-review.googlesource.com/c/1541677 |
| // |
| // Supports crrev.com. |
| // |
| // If err is nil, returned change is guaranteed to have Host and Change. |
| func parseCL(s string) (*pb.GerritChange, error) { |
| ret := &pb.GerritChange{} |
| var change, patchSet string |
| if m := regexCLCRRev.FindStringSubmatch(s); m != nil { |
| ret.Host = "chromium-review.googlesource.com" |
| if m[1] == "i" { |
| ret.Host = "chrome-internal-review.googlesource.com" |
| } |
| change = m[2] |
| patchSet = m[4] |
| } else if m := regexCL.FindStringSubmatch(s); m != nil { |
| ret.Host = m[1] |
| ret.Project = m[5] |
| change = m[6] |
| patchSet = m[8] |
| } |
| |
| if ret.Host == "" { |
| return nil, fmt.Errorf("does not match r%q or r%q", regexCL, regexCLCRRev) |
| } |
| |
| var err error |
| ret.Change, err = strconv.ParseInt(change, 10, 64) |
| if err != nil { |
| return nil, fmt.Errorf("invalid change %q: %s", change, err) |
| } |
| |
| if patchSet != "" { |
| ret.Patchset, err = strconv.ParseInt(patchSet, 10, 64) |
| if err != nil { |
| return nil, fmt.Errorf("invalid patchset %q: %s", patchSet, err) |
| } |
| } |
| |
| return ret, nil |
| } |