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Show which branch a change request came from

8e1005eb2c104934adef950c5afc090d4025ce06 · Keenan Nemetz · 13d ago · parent b7ac1a00

Show which branch a change request came from

A request records the exact commit under review, and the page showed only
that: `main ← 43f98bcd`. The branch the work is on is how people talk about
a change, fetch it, and find it after it lands, and it was being thrown
away when the request was opened — the web form resolved the chosen branch
to a commit and kept only the commit.

`request.md` now records `head_ref:` beside `head:`. It is a display hint
and nothing else: approvals, checks, the diff and the landing gate still
name the commit, and a test pins that a branch name cannot authorise a
different tip. The request page, the request list and `vole change show`
show it, and the page marks the branch as moved or deleted when it no
longer points at the reviewed commit, so the name reads as provenance
rather than as a claim about what is being reviewed.

It is optional on read: records written before it existed still load, and
a request opened from a bare commit id records no branch.

server/web/writes.go +8

@@ -242,6 +242,13 @@ func (w Web) CreateChangeRequest(rw http.ResponseWriter, r http.Request) {
	242	242	http.Error(rw, "choose a base and a head branch", http.StatusBadRequest)
	243	243	return
	244	244	}
		245	// The head is a commit; the branch it came from is recorded as a display hint.
		246	// It has to be a real branch name, or a hand-edited form could store something
		247	// the metadata reader would refuse.
		248	if !m.Git().ValidBranch(head) {
		249	http.Error(rw, "that head branch does not exist yet; push it first", http.StatusBadRequest)
		250	return
		251	}
	245	252	headRef := "refs/heads/" + head
	246	253	if contributorOnly(ctx.ACL, ctx.Name) {
	247	254	// A contributor's head must be a branch the hook would let them push. The
@@ -266,6 +273,7 @@ func (w Web) CreateChangeRequest(rw http.ResponseWriter, r http.Request) {
	266	273	http.Error(rw, err.Error(), http.StatusBadRequest)
	267	274	return
	268	275	}
		276	req.HeadRef = head
	269	277	// Issues this request promises to close. They are checked when the request is
	270	278	// written, so a typo fails here rather than at the landing.
	271	279	req.Closes = closesField(r.PostFormValue("closes"))