Support annotated tags when using create release API

This adds a new field, "tag_message", that represents the message
of the annotated tag.

Author: kemzeb

modules/structs/release.go

@@ -33,6 +33,7 @@ type Release struct {
 type CreateReleaseOption struct {
 	// required: true
 	TagName      string `json:"tag_name" binding:"Required"`
+	TagMessage   string `json:"tag_message"`
 	Target       string `json:"target_commitish"`
 	Title        string `json:"name"`
 	Note         string `json:"body"`

routers/api/v1/repo/release.go

@@ -247,7 +247,7 @@ func CreateRelease(ctx *context.APIContext) {
 			IsTag:        false,
 			Repo:         ctx.Repo.Repository,
 		}
-		if err := release_service.CreateRelease(ctx.Repo.GitRepo, rel, nil, ""); err != nil {
+		if err := release_service.CreateRelease(ctx.Repo.GitRepo, rel, nil, form.TagMessage); err != nil {
 			if repo_model.IsErrReleaseAlreadyExist(err) {
 				ctx.APIError(http.StatusConflict, err)
 			} else if release_service.IsErrProtectedTagName(err) {