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	Various Merge Base fixes (#10786)
* Fix broken merge base migration v128 for merged PR * Allow PRs with deleted base branches to still show diff * as per @lunny Co-authored-by: Lauris BH <lauris@nix.lv>
This commit is contained in:
		@@ -200,6 +200,8 @@ var migrations = []Migration{
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	NewMigration("Add Branch Protection Protected Files Column", addBranchProtectionProtectedFilesColumn),
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	// v133 -> v134
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	NewMigration("Add EmailHash Table", addEmailHashTable),
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	// v134 -> v135
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	NewMigration("Refix merge base for merged pull requests", refixMergeBase),
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}
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// Migrate database to current version
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@@ -53,7 +53,7 @@ func fixMergeBase(x *xorm.Engine) error {
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			break
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		}
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		i += 50
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		i += len(prs)
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		for _, pr := range prs {
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			baseRepo := &Repository{ID: pr.BaseRepoID}
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			has, err := x.Table("repository").Get(baseRepo)
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@@ -81,10 +81,22 @@ func fixMergeBase(x *xorm.Engine) error {
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					}
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				}
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			} else {
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				var err error
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				pr.MergeBase, err = git.NewCommand("merge-base", "--", pr.MergedCommitID+"^", gitRefName).RunInDir(repoPath)
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				parentsString, err := git.NewCommand("rev-list", "--parents", "-n", "1", pr.MergedCommitID).RunInDir(repoPath)
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				if err != nil {
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					log.Error("Unable to get merge base for merged PR ID %d, Index %d in %s/%s. Error: %", pr.ID, pr.Index, baseRepo.OwnerName, baseRepo.Name, err)
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					log.Error("Unable to get parents for merged PR ID %d, Index %d in %s/%s. Error: %v", pr.ID, pr.Index, baseRepo.OwnerName, baseRepo.Name, err)
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					continue
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				}
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				parents := strings.Split(strings.TrimSpace(parentsString), " ")
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				if len(parents) < 2 {
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					continue
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				}
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				args := append([]string{"merge-base", "--"}, parents[1:]...)
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				args = append(args, gitRefName)
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				pr.MergeBase, err = git.NewCommand(args...).RunInDir(repoPath)
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				if err != nil {
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					log.Error("Unable to get merge base for merged PR ID %d, Index %d in %s/%s. Error: %v", pr.ID, pr.Index, baseRepo.OwnerName, baseRepo.Name, err)
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					continue
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				}
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			}
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										96
									
								
								models/migrations/v134.go
									
									
									
									
									
										Normal file
									
								
							
							
						
						
									
										96
									
								
								models/migrations/v134.go
									
									
									
									
									
										Normal file
									
								
							@@ -0,0 +1,96 @@
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// Copyright 2020 The Gitea Authors. All rights reserved.
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// Use of this source code is governed by a MIT-style
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// license that can be found in the LICENSE file.
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package migrations
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import (
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	"fmt"
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	"path/filepath"
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	"strings"
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	"code.gitea.io/gitea/modules/git"
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	"code.gitea.io/gitea/modules/log"
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	"code.gitea.io/gitea/modules/setting"
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	"xorm.io/xorm"
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)
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func refixMergeBase(x *xorm.Engine) error {
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	type Repository struct {
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		ID        int64 `xorm:"pk autoincr"`
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		OwnerID   int64 `xorm:"UNIQUE(s) index"`
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		OwnerName string
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		LowerName string `xorm:"UNIQUE(s) INDEX NOT NULL"`
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		Name      string `xorm:"INDEX NOT NULL"`
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	}
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	type PullRequest struct {
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		ID         int64 `xorm:"pk autoincr"`
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		Index      int64
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		HeadRepoID int64 `xorm:"INDEX"`
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		BaseRepoID int64 `xorm:"INDEX"`
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		HeadBranch string
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		BaseBranch string
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		MergeBase  string `xorm:"VARCHAR(40)"`
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		HasMerged      bool   `xorm:"INDEX"`
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		MergedCommitID string `xorm:"VARCHAR(40)"`
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	}
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	var limit = setting.Database.IterateBufferSize
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	if limit <= 0 {
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		limit = 50
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	}
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	i := 0
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	for {
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		prs := make([]PullRequest, 0, 50)
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		if err := x.Limit(limit, i).Asc("id").Where("has_merged = ?", true).Find(&prs); err != nil {
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			return fmt.Errorf("Find: %v", err)
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		}
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		if len(prs) == 0 {
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			break
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		}
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		i += len(prs)
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		for _, pr := range prs {
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			baseRepo := &Repository{ID: pr.BaseRepoID}
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			has, err := x.Table("repository").Get(baseRepo)
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			if err != nil {
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				return fmt.Errorf("Unable to get base repo %d %v", pr.BaseRepoID, err)
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			}
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			if !has {
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				log.Error("Missing base repo with id %d for PR ID %d", pr.BaseRepoID, pr.ID)
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				continue
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			}
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			userPath := filepath.Join(setting.RepoRootPath, strings.ToLower(baseRepo.OwnerName))
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			repoPath := filepath.Join(userPath, strings.ToLower(baseRepo.Name)+".git")
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			gitRefName := fmt.Sprintf("refs/pull/%d/head", pr.Index)
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			parentsString, err := git.NewCommand("rev-list", "--parents", "-n", "1", pr.MergedCommitID).RunInDir(repoPath)
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			if err != nil {
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				log.Error("Unable to get parents for merged PR ID %d, Index %d in %s/%s. Error: %v", pr.ID, pr.Index, baseRepo.OwnerName, baseRepo.Name, err)
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				continue
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			}
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			parents := strings.Split(strings.TrimSpace(parentsString), " ")
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			if len(parents) < 3 {
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				continue
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			}
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			// we should recalculate
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			args := append([]string{"merge-base", "--"}, parents[1:]...)
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			args = append(args, gitRefName)
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			pr.MergeBase, err = git.NewCommand(args...).RunInDir(repoPath)
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			if err != nil {
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				log.Error("Unable to get merge base for merged PR ID %d, Index %d in %s/%s. Error: %v", pr.ID, pr.Index, baseRepo.OwnerName, baseRepo.Name, err)
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				continue
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			}
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			pr.MergeBase = strings.TrimSpace(pr.MergeBase)
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			x.ID(pr.ID).Cols("merge_base").Update(pr)
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		}
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	}
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	return nil
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}
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@@ -308,7 +308,6 @@ func PrepareMergedViewPullInfo(ctx *context.Context, issue *models.Issue) *git.C
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	compareInfo, err := ctx.Repo.GitRepo.GetCompareInfo(ctx.Repo.Repository.RepoPath(),
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		pull.MergeBase, pull.GetGitRefName())
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	if err != nil {
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		if strings.Contains(err.Error(), "fatal: Not a valid object name") {
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			ctx.Data["IsPullRequestBroken"] = true
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@@ -360,9 +359,40 @@ func PrepareViewPullInfo(ctx *context.Context, issue *models.Issue) *git.Compare
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		ctx.Data["IsPullRequestBroken"] = true
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		ctx.Data["BaseTarget"] = pull.BaseBranch
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		ctx.Data["HeadTarget"] = pull.HeadBranch
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		ctx.Data["NumCommits"] = 0
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		ctx.Data["NumFiles"] = 0
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		return nil
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		sha, err := baseGitRepo.GetRefCommitID(pull.GetGitRefName())
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		if err != nil {
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			ctx.ServerError(fmt.Sprintf("GetRefCommitID(%s)", pull.GetGitRefName()), err)
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			return nil
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		}
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		commitStatuses, err := models.GetLatestCommitStatus(repo, sha, 0)
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		if err != nil {
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			ctx.ServerError("GetLatestCommitStatus", err)
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			return nil
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		}
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		if len(commitStatuses) > 0 {
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			ctx.Data["LatestCommitStatuses"] = commitStatuses
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			ctx.Data["LatestCommitStatus"] = models.CalcCommitStatus(commitStatuses)
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		}
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		compareInfo, err := baseGitRepo.GetCompareInfo(pull.BaseRepo.RepoPath(),
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			pull.MergeBase, pull.GetGitRefName())
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		if err != nil {
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			if strings.Contains(err.Error(), "fatal: Not a valid object name") {
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				ctx.Data["IsPullRequestBroken"] = true
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				ctx.Data["BaseTarget"] = pull.BaseBranch
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				ctx.Data["NumCommits"] = 0
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				ctx.Data["NumFiles"] = 0
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				return nil
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			}
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			ctx.ServerError("GetCompareInfo", err)
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			return nil
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		}
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		ctx.Data["NumCommits"] = compareInfo.Commits.Len()
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		ctx.Data["NumFiles"] = compareInfo.NumFiles
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		return compareInfo
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	}
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	var headBranchExist bool
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		Reference in New Issue
	
	Block a user