feat(winget): sync fork before opening PR

closes https://github.com/goreleaser/goreleaser/issues/4720

Signed-off-by: Carlos Alexandro Becker <caarlos0@users.noreply.github.com>

internal/client/client.go

@@ -90,6 +90,11 @@ type ReleaseNotesGenerator interface {
 	GenerateReleaseNotes(ctx *context.Context, repo Repo, prev, current string) (string, error)
 }
 
+// ForkSyncer can sync forks.
+type ForkSyncer interface {
+	SyncFork(ctx *context.Context, head, base Repo) error
+}
+
 // PullRequestOpener can open pull requests.
 type PullRequestOpener interface {
 	OpenPullRequest(ctx *context.Context, base, head Repo, title string, draft bool) error

internal/client/github.go

@@ -28,6 +28,7 @@ var (
 	_ Client                = &githubClient{}
 	_ ReleaseNotesGenerator = &githubClient{}
 	_ PullRequestOpener     = &githubClient{}
+	_ ForkSyncer            = &githubClient{}
 )
 
 type githubClient struct {
@@ -217,6 +218,7 @@ func (c *githubClient) OpenPullRequest(
 	if len(tpl) > 0 {
 		log.Info("got a pr template")
 	}
+
 	log := log.
 		WithField("base", headString(base, Repo{})).
 		WithField("head", headString(base, head)).
@@ -245,6 +247,31 @@ func (c *githubClient) OpenPullRequest(
 	return nil
 }
 
+func (c *githubClient) SyncFork(ctx *context.Context, head, base Repo) error {
+	branch := base.Branch
+	if branch == "" {
+		def, err := c.getDefaultBranch(ctx, base)
+		if err != nil {
+			return err
+		}
+		branch = def
+	}
+	res, _, err := c.client.Repositories.MergeUpstream(
+		ctx,
+		head.Owner,
+		head.Name,
+		&github.RepoMergeUpstreamRequest{
+			Branch: github.String(branch),
+		},
+	)
+	if res != nil {
+		log.WithField("merge_type", res.GetMergeType()).
+			WithField("base_branch", res.GetBaseBranch()).
+			Info(res.GetMessage())
+	}
+	return err
+}
+
 func (c *githubClient) CreateFile(
 	ctx *context.Context,
 	commitAuthor config.CommitAuthor,

internal/client/mock.go

@@ -16,6 +16,7 @@ var (
 	_ Client                = &Mock{}
 	_ ReleaseNotesGenerator = &Mock{}
 	_ PullRequestOpener     = &Mock{}
+	_ ForkSyncer            = &Mock{}
 )
 
 func NewMock() *Mock {
@@ -42,6 +43,12 @@ type Mock struct {
 	ReleaseNotes         string
 	ReleaseNotesParams   []string
 	OpenedPullRequest    bool
+	SyncedFork           bool
+}
+
+func (c *Mock) SyncFork(ctx *context.Context, head Repo, base Repo) error {
+	c.SyncedFork = true
+	return nil
 }
 
 func (c *Mock) OpenPullRequest(_ *context.Context, _, _ Repo, _ string, _ bool) error {

internal/pipe/winget/winget.go

@@ -315,6 +315,20 @@ func doPublish(ctx *context.Context, cl client.Client, wingets []*artifact.Artif
 		return err
 	}
 
+	base := client.Repo{
+		Name:   winget.Repository.PullRequest.Base.Name,
+		Owner:  winget.Repository.PullRequest.Base.Owner,
+		Branch: winget.Repository.PullRequest.Base.Branch,
+	}
+
+	// try to sync branch
+	fscli, ok := cl.(client.ForkSyncer)
+	if ok && winget.Repository.PullRequest.Enabled {
+		if err := fscli.SyncFork(ctx, repo, base); err != nil {
+			log.WithError(err).Warn("could not sync fork")
+		}
+	}
+
 	for _, file := range files {
 		if err := cl.CreateFile(
 			ctx,
@@ -339,11 +353,7 @@ func doPublish(ctx *context.Context, cl client.Client, wingets []*artifact.Artif
 		return fmt.Errorf("client does not support pull requests")
 	}
 
-	return pcl.OpenPullRequest(ctx, client.Repo{
-		Name:   winget.Repository.PullRequest.Base.Name,
-		Owner:  winget.Repository.PullRequest.Base.Owner,
-		Branch: winget.Repository.PullRequest.Base.Branch,
-	}, repo, msg, winget.Repository.PullRequest.Draft)
+	return pcl.OpenPullRequest(ctx, base, repo, msg, winget.Repository.PullRequest.Draft)
 }
 
 func langserverLineFor(tp artifact.Type) string {

internal/pipe/winget/winget_test.go

@@ -127,6 +127,10 @@ func TestRunPipe(t *testing.T) {
 					Branch: "update-{{.Version}}",
 					PullRequest: config.PullRequest{
 						Enabled: true,
+						Base: config.PullRequestBase{
+							Owner: "ms",
+							Name:  "winget",
+						},
 					},
 				},
 			},
@@ -753,6 +757,7 @@ func TestRunPipe(t *testing.T) {
 			}
 
 			if tt.winget.Repository.PullRequest.Enabled {
+				require.True(t, client.SyncedFork)
 				require.True(t, client.OpenedPullRequest)
 			}
 		})

www/docs/includes/prs.md

@@ -41,6 +41,7 @@ something: # can be nix, brews, etc...
 
 This will:
 
+- Try to sync the `john/repo` fork with `mike/repo:main` (if on GitHub).
 - Create the files into `john/repo`, in the branch `foo-1.2.3` (assuming
   `ProjectName=foo` and `Version=1.2.3`). [^head]
 - Open a pull request from `john/repo` into `mike/repo`, with the branch `main`
@@ -51,8 +52,6 @@ This will:
 
 ### Things that don't work
 
-- **GoReleaser will not keep your fork in sync!!!** It might or might not be a
-  problem in your case, in which case you'll have to sync it manually.
 - Opening pull requests to a forked repository (`go-github` does not have the
   required fields to do it).
 - Since this can fail for a myriad of reasons, if an error happen, it'll log it