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Render issues, changes and the activity feed from the index

14b5c648a04090d0e718f5920f6abfc2d14c7274 · Keenan Nemetz · 10d ago · parent 9d8dd1bc

Render issues, changes and the activity feed from the index

Stage 3: the pages that still read the metadata branch now read the rows
the request already refreshed.

- The issue page reads its issue, comments, labels, assignees and number
  from the index. Its one remaining git read is the backlink search
  (`log --grep`), which is a content search, not a record lookup.
- A change page reads its one request from the index for a GET. A write
  request still reads git: it has no memo because it may have just
  changed the record, and it must not be answered by the version it
  replaced.
- The activity feed builds its issue, change, comment and approval events
  from the index. It keeps the metadata log for state changes (a reopened
  issue is two events and the file only knows the last), the latest
  commit, and tags: the remaining git calls are content, not duplicates.

Git calls per page on the fixture (40 files, 30 issues, 30 changes):

  issue view     7 -> 3
  change view   12 -> 9
  activity      whole-tree reads -> one log, one commit, one tag listing

The change page's remaining calls are the diff and the merge check; the
issue page's are the backlink search.

server/web/issues.go +3−3

@@ -201,8 +201,8 @@ func (w Web) issueThread(r http.Request, m repo.Meta, iss metadata.Issue, er
	201	201	}, w.commentViews(m, iss.Comments))
	202	202	}
	203	203
	204		// IssueView renders one issue and its thread. The issue is read from git rather
	205		// than the index, so bodies are never stale relative to the branch.
		204	// IssueView renders one issue and its thread. The issue and its comments come
		205	// from the index, which the request refreshed to the branch's current commit.
	206	206	func (w Web) IssueView(rw http.ResponseWriter, r http.Request) {
	207	207	m, ok := w.open(rw, r)
	208	208	if !ok {
@@ -213,7 +213,7 @@ func (w Web) IssueView(rw http.ResponseWriter, r http.Request) {
	213	213	w.notFound(rw, r)
	214	214	return
	215	215	}
	216		iss, err := index.LoadIssue(m, id)
		216	iss, err := w.issueAt(memoOf(r), m, id)
	217	217	if err != nil {
	218	218	w.notFound(rw, r)
	219	219	return