[GITEA] Allow release creation on commit

- The code and tests are already there to allow releases to be created
on commits.
- This patch modifies the web code to take into account that an commitID
could've been passed as target.
- Added unit test.
- Resolves https://codeberg.org/forgejo/forgejo/issues/1196

(cherry picked from commit 90863e0ab5)
(cherry picked from commit c805aa23b5)
(cherry picked from commit cf45567ca6)
(cherry picked from commit 672a2b91e5)
(cherry picked from commit 82c930152c)
(cherry picked from commit 95ac2508b3)
(cherry picked from commit b13a81ab98)
(cherry picked from commit 9f463a7c1f)
(cherry picked from commit 758ce84dc5)

Conflicts:
	tests/integration/release_test.go
	https://codeberg.org/forgejo/forgejo/pulls/1550
(cherry picked from commit edf0531aee)
(cherry picked from commit 44b29f3a1d)
(cherry picked from commit b851b67419)
(cherry picked from commit 59c22547d7)
(cherry picked from commit 1eae28475b)
(cherry picked from commit a7b25047b1)

routers/web/repo/release.go

@@ -387,7 +387,9 @@ func NewReleasePost(ctx *context.Context) {
 		return
 	}
 
-	if !ctx.Repo.GitRepo.IsBranchExist(form.Target) {
+	// form.Target can be a branch name or a full commitID.
+	if !ctx.Repo.GitRepo.IsBranchExist(form.Target) &&
+		len(form.Target) == git.SHAFullLength && !ctx.Repo.GitRepo.IsCommitExist(form.Target) {
 		ctx.RenderWithErr(ctx.Tr("form.target_branch_not_exist"), tplReleaseNew, &form)
 		return
 	}

tests/integration/release_test.go

@@ -21,6 +21,10 @@ import (
 )
 
 func createNewRelease(t *testing.T, session *TestSession, repoURL, tag, title string, preRelease, draft bool) {
+	createNewReleaseTarget(t, session, repoURL, tag, title, "master", preRelease, draft)
+}
+
+func createNewReleaseTarget(t *testing.T, session *TestSession, repoURL, tag, title, target string, preRelease, draft bool) {
 	req := NewRequest(t, "GET", repoURL+"/releases/new")
 	resp := session.MakeRequest(t, req, http.StatusOK)
 	htmlDoc := NewHTMLParser(t, resp.Body)
@@ -31,7 +35,7 @@ func createNewRelease(t *testing.T, session *TestSession, repoURL, tag, title st
 	postData := map[string]string{
 		"_csrf":      htmlDoc.GetCSRF(),
 		"tag_name":   tag,
-		"tag_target": "master",
+		"tag_target": target,
 		"title":      title,
 		"content":    "",
 	}
@@ -217,6 +221,15 @@ func TestViewReleaseListLogin(t *testing.T) {
 	}, links)
 }
 
+func TestReleaseOnCommit(t *testing.T) {
+	defer tests.PrepareTestEnv(t)()
+
+	session := loginUser(t, "user2")
+	createNewReleaseTarget(t, session, "/user2/repo1", "v0.0.1", "v0.0.1", "65f1bf27bc3bf70f64657658635e66094edbcb4d", false, false)
+
+	checkLatestReleaseAndCount(t, session, "/user2/repo1", "v0.0.1", translation.NewLocale("en-US").Tr("repo.release.stable"), 4)
+}
+
 func TestViewTagsList(t *testing.T) {
 	defer tests.PrepareTestEnv(t)()