| // Copyright 2019 Google LLC |
| // |
| // 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 generator provides tools for generating clients. |
| package generator |
| |
| import ( |
| "bytes" |
| "context" |
| "fmt" |
| "log" |
| "os" |
| "os/exec" |
| "path/filepath" |
| "strings" |
| ) |
| |
| // Generate generates genproto and gapics. |
| func Generate(ctx context.Context, googleapisDir, genprotoDir, gocloudDir, protoDir string, gapicToGenerate string) error { |
| if err := regenGenproto(ctx, genprotoDir, googleapisDir, protoDir); err != nil { |
| return fmt.Errorf("error generating genproto (may need to check logs for more errors): %v", err) |
| } |
| |
| if err := generateGapics(ctx, googleapisDir, protoDir, gocloudDir, genprotoDir, gapicToGenerate); err != nil { |
| return fmt.Errorf("error generating gapics (may need to check logs for more errors): %v", err) |
| } |
| |
| if err := recordGoogleapisHash(googleapisDir, genprotoDir); err != nil { |
| return fmt.Errorf("error recording most recent googleapis hash: %v", err) |
| } |
| |
| return nil |
| } |
| |
| // recordGoogleapisHash parses the latest commit in googleapis and records it to |
| // regen.txt in go-genproto. |
| func recordGoogleapisHash(googleapisDir, genprotoDir string) error { |
| out := bytes.NewBuffer(nil) |
| c := command("git", "rev-list", "HEAD^..") |
| c.Stdout = out |
| c.Stderr = os.Stderr |
| c.Dir = googleapisDir |
| if err := c.Run(); err != nil { |
| return err |
| } |
| commits := strings.Split(strings.TrimSpace(out.String()), "\n") |
| if len(commits) != 1 { |
| return fmt.Errorf("only expected one commit, got %d", len(commits)) |
| } |
| |
| f, err := os.OpenFile(filepath.Join(genprotoDir, "regen.txt"), os.O_WRONLY|os.O_CREATE|os.O_TRUNC, 0644) |
| if err != nil { |
| return err |
| } |
| defer f.Close() |
| if _, err := f.WriteString(commits[0]); err != nil { |
| return err |
| } |
| return nil |
| } |
| |
| // build attempts to build all packages recursively from the given directory. |
| func build(dir string) error { |
| c := command("go", "build", "./...") |
| c.Stdout = os.Stdout |
| c.Stderr = os.Stderr |
| c.Dir = dir |
| return c.Run() |
| } |
| |
| // vet runs linters on all .go files recursively from the given directory. |
| func vet(dir string) error { |
| c := command("goimports", "-w", ".") |
| c.Stdout = os.Stdout |
| c.Stderr = os.Stderr |
| c.Dir = dir |
| if err := c.Run(); err != nil { |
| return err |
| } |
| |
| c = command("gofmt", "-s", "-d", "-w", "-l", ".") |
| c.Stdout = os.Stdout |
| c.Stderr = os.Stderr |
| c.Dir = dir |
| return c.Run() |
| } |
| |
| type cmdWrapper struct { |
| *exec.Cmd |
| } |
| |
| func command(name string, arg ...string) *cmdWrapper { |
| return &cmdWrapper{exec.Command(name, arg...)} |
| } |
| |
| func (cw *cmdWrapper) Run() error { |
| log.Printf(">>>> %v <<<<", strings.Join(cw.Cmd.Args, " ")) // NOTE: we have some multi-line commands, make it clear where the command starts and ends |
| return cw.Cmd.Run() |
| } |