Release

internal/gitea/gitea.go

@@ -8,6 +8,8 @@ import (
 	giteaSDK "code.gitea.io/sdk/gitea"
 )
 
+const prMarker = "<!-- stamp-release-pr -->"
+
 // Client wraps the Gitea API.
 type Client struct {
 	client *giteaSDK.Client
@@ -74,6 +76,51 @@ func (c *Client) UploadAsset(releaseID int64, filePath string) error {
 	return nil
 }
 
+// UpsertPR creates or updates a stamp release PR on the given base branch.
+// It identifies the existing PR by scanning open PRs for the hidden marker in the body.
+func (c *Client) UpsertPR(head, base, title, body string) (int64, string, error) {
+	markedBody := prMarker + "\n" + body
+
+	// Search open PRs for an existing stamp release PR (Gitea SDK does not support
+	// filtering by head branch, so we filter client-side).
+	prs, _, err := c.client.ListRepoPullRequests(c.owner, c.repo, giteaSDK.ListPullRequestsOptions{
+		State: giteaSDK.StateOpen,
+	})
+	if err != nil {
+		return 0, "", fmt.Errorf("listing pull requests: %w", err)
+	}
+
+	for _, pr := range prs {
+		if pr.Head != nil && pr.Head.Name != head {
+			continue
+		}
+		if strings.Contains(pr.Body, prMarker) {
+			// Update existing PR.
+			updated, _, err := c.client.EditPullRequest(c.owner, c.repo, pr.Index,
+				giteaSDK.EditPullRequestOption{
+					Title: title,
+					Body:  &markedBody,
+				})
+			if err != nil {
+				return 0, "", fmt.Errorf("updating pull request #%d: %w", pr.Index, err)
+			}
+			return updated.Index, updated.HTMLURL, nil
+		}
+	}
+
+	// Create a new PR.
+	pr, _, err := c.client.CreatePullRequest(c.owner, c.repo, giteaSDK.CreatePullRequestOption{
+		Head:  head,
+		Base:  base,
+		Title: title,
+		Body:  markedBody,
+	})
+	if err != nil {
+		return 0, "", fmt.Errorf("creating pull request: %w", err)
+	}
+	return pr.Index, pr.HTMLURL, nil
+}
+
 // UpsertPRComment posts or updates a stamped PR comment.
 func (c *Client) UpsertPRComment(prNumber int, body string) error {
 	markedBody := commentMarker + "\n" + body