When updating by rebase we need to set the environment for head repo (#22535) (#22536)

Backport #22535

The update by rebase code reuses the merge code but shortcircuits and
pushes back up to the head. However, it doesn't set the correct pushing
environment - and just uses the same environment as the base repo. This
leads to the push update failing and thence the PR becomes out-of-sync
with the head.

This PR fixes this and adjusts the trace logging elsewhere to help make
this clearer.

Fix #18802

Signed-off-by: Andrew Thornton <art27@cantab.net>

Signed-off-by: Andrew Thornton <art27@cantab.net>

CHANGELOG.md

@@ -4,6 +4,18 @@ This changelog goes through all the changes that have been made in each release
 without substantial changes to our git log; to see the highlights of what has
 been added to each release, please refer to the [blog](https://blog.gitea.io).
 
+## [1.18.2](https://github.com/go-gitea/gitea/releases/tag/v1.18.2) - 2023-01-19
+
+* BUGFIXES
+  * When updating by rebase we need to set the environment for head repo (#22535) (#22536)
+  * Fix issue not auto-closing when it includes a reference to a branch (#22514) (#22521)
+  * Fix invalid issue branch reference if not specified in template (#22513) (#22520)
+  * Fix 500 error viewing pull request when fork has pull requests disabled (#22512) (#22515)
+  * Reliable selection of admin user (#22509) (#22511)
+  * Set disable_gravatar/enable_federated_avatar when offline mode is true (#22479) (#22496)
+* BUILD
+  * cgo cross-compile for freebsd (#22397) (#22519)
+
 ## [1.18.1](https://github.com/go-gitea/gitea/releases/tag/v1.18.1) - 2023-01-17
 
 * API

routers/web/repo/issue.go

@@ -786,7 +786,8 @@ func setTemplateIfExists(ctx *context.Context, ctxDataKey string, possibleFiles
 			}
 
 		}
-		if !strings.HasPrefix(template.Ref, "refs/") { // Assume that the ref intended is always a branch - for tags users should use refs/tags/<ref>
+
+		if template.Ref != "" && !strings.HasPrefix(template.Ref, "refs/") { // Assume that the ref intended is always a branch - for tags users should use refs/tags/<ref>
 			template.Ref = git.BranchPrefix + template.Ref
 		}
 		ctx.Data["HasSelectedLabel"] = len(labelIDs) > 0

services/issue/commit.go

@@ -19,6 +19,7 @@ import (
 	repo_model "code.gitea.io/gitea/models/repo"
 	user_model "code.gitea.io/gitea/models/user"
 	"code.gitea.io/gitea/modules/container"
+	"code.gitea.io/gitea/modules/git"
 	"code.gitea.io/gitea/modules/log"
 	"code.gitea.io/gitea/modules/references"
 	"code.gitea.io/gitea/modules/repository"
@@ -176,7 +177,8 @@ func UpdateIssuesCommit(doer *user_model.User, repo *repo_model.Repository, comm
 			if !repo.CloseIssuesViaCommitInAnyBranch {
 				// If the issue was specified to be in a particular branch, don't allow commits in other branches to close it
 				if refIssue.Ref != "" {
-					if branchName != refIssue.Ref {
+					issueBranchName := strings.TrimPrefix(refIssue.Ref, git.BranchPrefix)
+					if branchName != issueBranchName {
 						continue
 					}
 					// Otherwise, only process commits to the default branch

services/pull/merge.go

@@ -584,19 +584,25 @@ func rawMerge(ctx context.Context, pr *issues_model.PullRequest, doer *user_mode
 		headUser = pr.HeadRepo.Owner
 	}
 
-	env = repo_module.FullPushingEnvironment(
-		headUser,
-		doer,
-		pr.BaseRepo,
-		pr.BaseRepo.Name,
-		pr.ID,
-	)
-
 	var pushCmd *git.Command
 	if mergeStyle == repo_model.MergeStyleRebaseUpdate {
 		// force push the rebase result to head branch
+		env = repo_module.FullPushingEnvironment(
+			headUser,
+			doer,
+			pr.HeadRepo,
+			pr.HeadRepo.Name,
+			pr.ID,
+		)
 		pushCmd = git.NewCommand(ctx, "push", "-f", "head_repo").AddDynamicArguments(stagingBranch + ":" + git.BranchPrefix + pr.HeadBranch)
 	} else {
+		env = repo_module.FullPushingEnvironment(
+			headUser,
+			doer,
+			pr.BaseRepo,
+			pr.BaseRepo.Name,
+			pr.ID,
+		)
 		pushCmd = git.NewCommand(ctx, "push", "origin").AddDynamicArguments(baseBranch + ":" + git.BranchPrefix + pr.BaseBranch)
 	}
 

services/repository/push.go

@@ -104,6 +104,8 @@ func pushUpdates(optsList []*repo_module.PushUpdateOptions) error {
 	var pusher *user_model.User
 
 	for _, opts := range optsList {
+		log.Trace("pushUpdates: %-v %s %s %s", repo, opts.OldCommitID, opts.NewCommitID, opts.RefFullName)
+
 		if opts.IsNewRef() && opts.IsDelRef() {
 			return fmt.Errorf("old and new revisions are both %s", git.EmptySHA)
 		}
@@ -129,7 +131,7 @@ func pushUpdates(optsList []*repo_module.PushUpdateOptions) error {
 			} else { // is new tag
 				newCommit, err := gitRepo.GetCommit(opts.NewCommitID)
 				if err != nil {
-					return fmt.Errorf("gitRepo.GetCommit: %w", err)
+					return fmt.Errorf("gitRepo.GetCommit(%s) in %s/%s[%d]: %w", opts.NewCommitID, repo.OwnerName, repo.Name, repo.ID, err)
 				}
 
 				commits := repo_module.NewPushCommits()
@@ -162,7 +164,7 @@ func pushUpdates(optsList []*repo_module.PushUpdateOptions) error {
 
 				newCommit, err := gitRepo.GetCommit(opts.NewCommitID)
 				if err != nil {
-					return fmt.Errorf("gitRepo.GetCommit: %w", err)
+					return fmt.Errorf("gitRepo.GetCommit(%s) in %s/%s[%d]: %w", opts.NewCommitID, repo.OwnerName, repo.Name, repo.ID, err)
 				}
 
 				refName := opts.RefName()