rebase: remove existed comments

internal/linters/git-flow/rebase-suggestion/rebase_suggestion.go

@@ -0,0 +1,172 @@
+/*
+ Copyright 2024 Qiniu Cloud (qiniu.com).
+
+ 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 rebase_suggestion
+
+import (
+	"bytes"
+	"context"
+	"fmt"
+	"regexp"
+	"strings"
+	"text/template"
+
+	"github.com/cr-bot/config"
+	"github.com/cr-bot/internal/linters"
+	"github.com/google/go-github/v57/github"
+	"github.com/qiniu/x/log"
+)
+
+var lintName = "rebase-suggestion"
+
+func init() {
+	linters.RegisterCommentHandler(lintName, rebaseSuggestionHandler)
+}
+
+func rebaseSuggestionHandler(linterConfig config.Linter, agent linters.Agent, event github.PullRequestEvent) error {
+	var (
+		org    = event.GetRepo().GetOwner().GetLogin()
+		repo   = event.GetRepo().GetName()
+		number = event.GetNumber()
+	)
+
+	preFilterCommits, err := listMatchedCommitMessages(context.Background(), agent, org, repo, number)
+	if err != nil {
+		return err
+	}
+
+	existedComments, err := listExistedComments(context.Background(), agent, org, repo, number)
+	if err != nil {
+		return err
+	}
+
+	return handle(context.Background(), agent, org, repo, number, preFilterCommits, existedComments)
+}
+
+var rebaseSuggestionFlag = "**[REBASE SUGGESTION]**"
+
+var rebaseSuggestionTmpl = rebaseSuggestionFlag + ` This PR has commit message like:
+{{range	.}}
+> {{.}}
+{{end}}
+
+Which seems insignificant, recommend to use ` + "`git rebase <upstream> <branch>`" + `to reorganize your PR. 
+
+<details>
+
+If you have any questions about this comment, feel free to raise an issue here:
+
+- **https://github.com/qiniu/cr-bot/issues**
+
+</details>
+ `
+
+func handle(ctx context.Context, agent linters.Agent, org, repo string, number int, prefilterCommits []*github.RepositoryCommit, existedComments []*github.IssueComment) error {
+	var commitMessages []string
+	for _, commit := range prefilterCommits {
+		commitMessages = append(commitMessages, *commit.Commit.Message)
+	}
+
+	tmpl, err := template.New("rebase-suggestion").Parse(rebaseSuggestionTmpl)
+	if err != nil {
+		return err
+	}
+
+	var buf bytes.Buffer
+	if err = tmpl.Execute(&buf, commitMessages); err != nil {
+		return err
+	}
+
+	var expectedComment = buf.String()
+
+	// check if comment already existed
+	for _, comment := range existedComments {
+		if comment.Body != nil && *comment.Body == expectedComment {
+			log.Infof("comment already existed: %v", comment.Body)
+			return nil
+		}
+	}
+
+	// remove old comments
+	for _, comment := range existedComments {
+		if comment.Body != nil && strings.Contains(*comment.Body, rebaseSuggestionFlag) {
+			_, err := agent.GitHubClient().Issues.DeleteComment(context.Background(), org, repo, *comment.ID)
+			if err != nil {
+				log.Warnf("delete comment failed: %v", err)
+				continue
+			}
+		}
+	}
+
+	// add new comment
+	if len(commitMessages) > 0 {
+		c, resp, err := agent.GitHubClient().Issues.CreateComment(context.Background(), org, repo, number, &github.IssueComment{
+			Body: &expectedComment,
+		})
+		if err != nil {
+			return err
+		}
+		if resp.StatusCode != 201 {
+			log.Errorf("create comment failed: %v", resp)
+			return fmt.Errorf("create comment failed: %v", resp.Body)
+		}
+
+		log.Infof("create comment success: %v", c)
+	}
+
+	return nil
+}
+
+func listMatchedCommitMessages(ctx context.Context, agent linters.Agent, org, repo string, number int) ([]*github.RepositoryCommit, error) {
+	var preFilterCommits []*github.RepositoryCommit
+	opts := &github.ListOptions{}
+	commits, response, err := agent.GitHubClient().PullRequests.ListCommits(context.Background(), org, repo, number, opts)
+	if err != nil {
+		return preFilterCommits, err
+	}
+
+	if response.StatusCode != 200 {
+		log.Errorf("list commits failed: %v", response)
+		return preFilterCommits, fmt.Errorf("list commits failed: %v", response.Body)
+	}
+
+	pattern := `^Merge (.*) into (.*)$`
+	reg := regexp.MustCompile(pattern)
+
+	for _, commit := range commits {
+		if commit.Commit != nil && commit.Commit.Message != nil {
+			if reg.MatchString(*commit.Commit.Message) {
+				preFilterCommits = append(preFilterCommits, commit)
+			}
+		}
+	}
+
+	return preFilterCommits, nil
+}
+
+func listExistedComments(ctx context.Context, agent linters.Agent, org, repo string, number int) ([]*github.IssueComment, error) {
+	comments, resp, err := agent.GitHubClient().Issues.ListComments(ctx, org, repo, number, &github.IssueListCommentsOptions{})
+	if err != nil {
+		return nil, err
+	}
+
+	if resp.StatusCode != 200 {
+		log.Errorf("list comments failed: %v", resp)
+		return nil, fmt.Errorf("list comments failed: %v", resp.Body)
+	}
+
+	return comments, nil
+}

internal/linters/git-flow/rebase-suggestion/rebase_suggestion_test.go

@@ -0,0 +1,22 @@
+package rebase_suggestion
+
+import (
+	"bytes"
+	"testing"
+	"text/template"
+)
+
+func TestRebaseSuggestionTmpl(t *testing.T) {
+	tmpl, err := template.New("rebase_suggestion").Parse(rebaseSuggestionTmpl)
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	var buf bytes.Buffer
+	err = tmpl.Execute(&buf, []string{"commit1", "commit2"})
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	t.Log(buf.String())
+}

server.go

@@ -1,12 +1,12 @@
 /*
  Copyright 2024 Qiniu Cloud (qiniu.com).
- 
+
  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.
@@ -158,12 +158,13 @@ func (s *Server) handle(log *xlog.Logger, ctx context.Context, event *github.Pul
 			lingerConfig.WorkDir = r.Directory() + "/" + lingerConfig.WorkDir
 		}
 
+		log.Infof("running %s on repo %v with config %v", name, fmt.Sprintf("%s/%s", org, repo), lingerConfig)
+
 		agent := linters.NewAgent(s.gc, s.gitClientFactory, s.config)
 		if err := fn(lingerConfig, agent, *event); err != nil {
 			log.Errorf("failed to run linter: %v", err)
 			return err
 		}
-		log.Infof("commented on PR %d (%s) successfully\n", num, org+"/"+repo)
 	}
 
 	return nil