Merge pull request #106 from pyelias/rss-grouping

Group recent-changes feeds (#61)

help/en/feeds.myco

@@ -0,0 +1,39 @@
+# Help: Feeds
+Mycorrhiza Wiki has RSS, Atom, and JSON feeds to track the latest changes on the wiki.
+These feeds are linked on the [[/recent-changes | recent changes page]].
+
+## Options
+These feeds have options to combine related changes into groups:
+* {
+    **period** Can be set to lengths of time like `5m`, `24h`, etc.
+    Edits by the same author that happen within this time of each other can be grouped into one item in the feed.
+}
+* {
+    **same** Can be set to `author`, `message`, or `none`.
+    Edits will only be grouped together if they have the same author or message. By default, edits need to have the same author and message. If it is `none`, all edits can be grouped.
+}
+* {
+    **order** Can be set to `old-to-now` (default) or `new-to-old`.
+    This determines what order edits in groups will be shown in in your feed.
+}
+
+If none of these options are set, changes will never be grouped.
+
+## Examples
+URLs for feeds using these options look like this:
+* {
+    `/recent-changes-rss?period=1h`
+    Changes within one hour of each other with the same author and message will be grouped together.
+}
+* {
+    `/recent-changes-atom?period=1h&order=new-to-old`
+    Same as the last one, but the groups will be shown in the opposite order.
+}
+* {
+    `/recent-changes-atom?period=1h&same=none`
+    Changes within one hour of each other will be grouped together, even with different authors and messages.
+}
+* {
+    `/recent-changes-atom?same=author&same=message`
+    Changes with the same author and message will be grouped together no matter how much time passes between them.
+}

history/feed.go

@@ -0,0 +1,318 @@
+package history
+
+import (
+	"errors"
+	"fmt"
+	"net/url"
+	"strings"
+	"time"
+
+	"github.com/bouncepaw/mycorrhiza/cfg"
+
+	"github.com/gorilla/feeds"
+)
+
+const changeGroupMaxSize = 30
+
+func recentChangesFeed(opts FeedOptions) *feeds.Feed {
+	feed := &feeds.Feed{
+		Title:       cfg.WikiName + " (recent changes)",
+		Link:        &feeds.Link{Href: cfg.URL},
+		Description: fmt.Sprintf("List of %d recent changes on the wiki", changeGroupMaxSize),
+		Updated:     time.Now(),
+	}
+	revs := newRecentChangesStream()
+	groups := groupRevisions(revs, opts)
+	for _, grp := range groups {
+		item := grp.feedItem(opts)
+		feed.Add(&item)
+	}
+	return feed
+}
+
+// RecentChangesRSS creates recent changes feed in RSS format.
+func RecentChangesRSS(opts FeedOptions) (string, error) {
+	return recentChangesFeed(opts).ToRss()
+}
+
+// RecentChangesAtom creates recent changes feed in Atom format.
+func RecentChangesAtom(opts FeedOptions) (string, error) {
+	return recentChangesFeed(opts).ToAtom()
+}
+
+// RecentChangesJSON creates recent changes feed in JSON format.
+func RecentChangesJSON(opts FeedOptions) (string, error) {
+	return recentChangesFeed(opts).ToJSON()
+}
+
+// revisionGroup is a slice of revisions, ordered most recent first.
+type revisionGroup []Revision
+
+func newRevisionGroup(rev Revision) revisionGroup {
+	return revisionGroup([]Revision{rev})
+}
+
+func (grp *revisionGroup) addRevision(rev Revision) {
+	*grp = append(*grp, rev)
+}
+
+// orderedIndex returns the ith revision in the group following the given order.
+func (grp *revisionGroup) orderedIndex(i int, order feedGroupOrder) *Revision {
+	switch order {
+	case newToOld:
+		return &(*grp)[i]
+	case oldToNew:
+		return &(*grp)[len(*grp)-1-i]
+	}
+	// unreachable
+	return nil
+}
+
+func groupRevisionsByMonth(revs []Revision) (res []revisionGroup) {
+	var (
+		currentYear  int
+		currentMonth time.Month
+	)
+	for _, rev := range revs {
+		if rev.Time.Month() != currentMonth || rev.Time.Year() != currentYear {
+			currentYear = rev.Time.Year()
+			currentMonth = rev.Time.Month()
+			res = append(res, newRevisionGroup(rev))
+		} else {
+			res[len(res)-1].addRevision(rev)
+		}
+	}
+	return res
+}
+
+// groupRevisions groups revisions for a feed.
+// It returns the first changeGroupMaxSize (30) groups.
+// The grouping parameter determines when two revisions will be grouped.
+func groupRevisions(revs recentChangesStream, opts FeedOptions) (res []revisionGroup) {
+	nextRev := revs.iterator()
+	rev, empty := nextRev()
+	if empty {
+		return res
+	}
+
+	currGroup := newRevisionGroup(rev)
+	for rev, done := nextRev(); !done; rev, done = nextRev() {
+		if opts.canGroup(currGroup, rev) {
+			currGroup.addRevision(rev)
+		} else {
+			res = append(res, currGroup)
+			if len(res) == changeGroupMaxSize {
+				return res
+			}
+			currGroup = newRevisionGroup(rev)
+		}
+	}
+	// no more revisions, haven't added the last group yet
+	return append(res, currGroup)
+}
+
+func (grp revisionGroup) feedItem(opts FeedOptions) feeds.Item {
+	title, author := grp.titleAndAuthor(opts.order)
+	return feeds.Item{
+		Title:       title,
+		Author:      author,
+		Id:          grp[len(grp)-1].Hash,
+		Description: grp.descriptionForFeed(opts.order),
+		Created:     grp[len(grp)-1].Time, // earliest revision
+		Updated:     grp[0].Time,          // latest revision
+		Link:        &feeds.Link{Href: cfg.URL + grp[0].bestLink()},
+	}
+}
+
+// titleAndAuthor creates a title and author for a feed item.
+// If all messages and authors are the same (or there's just one rev), "message by author"
+// If all authors are the same, "num edits (first message, ...) by author"
+// Else (even if all messages are the same), "num edits (first message, ...)"
+func (grp revisionGroup) titleAndAuthor(order feedGroupOrder) (title string, author *feeds.Author) {
+	allMessagesSame := true
+	allAuthorsSame := true
+	for _, rev := range grp[1:] {
+		if rev.Message != grp[0].Message {
+			allMessagesSame = false
+		}
+		if rev.Username != grp[0].Username {
+			allAuthorsSame = false
+		}
+		if !allMessagesSame && !allAuthorsSame {
+			break
+		}
+	}
+
+	if allMessagesSame && allAuthorsSame {
+		title = grp[0].Message
+	} else {
+		title = fmt.Sprintf("%d edits (%s, ...)", len(grp), grp.orderedIndex(0, order).Message)
+	}
+
+	if allAuthorsSame {
+		title += fmt.Sprintf(" by %s", grp[0].Username)
+		author = &feeds.Author{Name: grp[0].Username}
+	} else {
+		author = nil
+	}
+
+	return title, author
+}
+
+func (grp revisionGroup) descriptionForFeed(order feedGroupOrder) string {
+	builder := strings.Builder{}
+	for i := 0; i < len(grp); i++ {
+		desc := grp.orderedIndex(i, order).descriptionForFeed()
+		builder.WriteString(desc)
+	}
+	return builder.String()
+}
+
+type feedOptionParserState struct {
+	isAnythingSet bool
+	conds         []groupingCondition
+	order         feedGroupOrder
+}
+
+// feedGrouping represents a set of conditions that must all be satisfied for revisions to be grouped.
+// If there are no conditions, revisions will never be grouped.
+type FeedOptions struct {
+	conds []groupingCondition
+	order feedGroupOrder
+}
+
+func ParseFeedOptions(query url.Values) (FeedOptions, error) {
+	parser := feedOptionParserState{}
+
+	err := parser.parseFeedGroupingPeriod(query)
+	if err != nil {
+		return FeedOptions{}, err
+	}
+	err = parser.parseFeedGroupingSame(query)
+	if err != nil {
+		return FeedOptions{}, err
+	}
+	err = parser.parseFeedGroupingOrder(query)
+	if err != nil {
+		return FeedOptions{}, err
+	}
+
+	var conds []groupingCondition
+	if parser.isAnythingSet {
+		conds = parser.conds
+	} else {
+		// if no options are applied, do no grouping instead of using the default options
+		conds = nil
+	}
+	return FeedOptions{conds: conds, order: parser.order}, nil
+}
+
+func (parser *feedOptionParserState) parseFeedGroupingPeriod(query url.Values) error {
+	if query["period"] != nil {
+		parser.isAnythingSet = true
+		period, err := time.ParseDuration(query.Get("period"))
+		if err != nil {
+			return err
+		}
+		parser.conds = append(parser.conds, periodGroupingCondition{period})
+	}
+	return nil
+}
+
+func (parser *feedOptionParserState) parseFeedGroupingSame(query url.Values) error {
+	if same := query["same"]; same != nil {
+		parser.isAnythingSet = true
+		if len(same) == 1 && same[0] == "none" {
+			// same=none adds no condition
+			parser.conds = append(parser.conds, sameGroupingCondition{})
+			return nil
+		} else {
+			// handle same=author, same=author&same=message, etc.
+			cond := sameGroupingCondition{}
+			for _, sameCond := range same {
+				switch sameCond {
+				case "author":
+					if cond.author {
+						return errors.New("set same=author twice")
+					}
+					cond.author = true
+				case "message":
+					if cond.message {
+						return errors.New("set same=message twice")
+					}
+					cond.message = true
+				default:
+					return errors.New("unknown same option " + sameCond)
+				}
+			}
+			parser.conds = append(parser.conds, cond)
+			return nil
+		}
+	} else {
+		// same defaults to both author and message
+		// but this won't be applied if no grouping options are set
+		parser.conds = append(parser.conds, sameGroupingCondition{author: true, message: true})
+		return nil
+	}
+}
+
+type feedGroupOrder int
+
+const (
+	newToOld feedGroupOrder = iota
+	oldToNew feedGroupOrder = iota
+)
+
+func (parser *feedOptionParserState) parseFeedGroupingOrder(query url.Values) error {
+	if order := query["order"]; order != nil {
+		parser.isAnythingSet = true
+		switch query.Get("order") {
+		case "old-to-new":
+			parser.order = oldToNew
+		case "new-to-old":
+			parser.order = newToOld
+		default:
+			return errors.New("unknown order option " + query.Get("order"))
+		}
+	} else {
+		parser.order = oldToNew
+	}
+	return nil
+}
+
+// canGroup determines whether a revision can be added to a group.
+func (opts FeedOptions) canGroup(grp revisionGroup, rev Revision) bool {
+	if len(opts.conds) == 0 {
+		return false
+	}
+
+	for _, cond := range opts.conds {
+		if !cond.canGroup(grp, rev) {
+			return false
+		}
+	}
+	return true
+}
+
+type groupingCondition interface {
+	canGroup(grp revisionGroup, rev Revision) bool
+}
+
+// periodGroupingCondition will group two revisions if they are within period of each other.
+type periodGroupingCondition struct {
+	period time.Duration
+}
+
+func (cond periodGroupingCondition) canGroup(grp revisionGroup, rev Revision) bool {
+	return grp[len(grp)-1].Time.Sub(rev.Time) < cond.period
+}
+
+type sameGroupingCondition struct {
+	author  bool
+	message bool
+}
+
+func (c sameGroupingCondition) canGroup(grp revisionGroup, rev Revision) bool {
+	return (!c.author || grp[0].Username == rev.Username) &&
+		(!c.message || grp[0].Message == rev.Message)
+}

history/history.go

@@ -4,14 +4,10 @@ package history
 import (
 	"bytes"
 	"fmt"
-	"html"
 	"log"
 	"os/exec"
 	"path/filepath"
 	"regexp"
-	"strconv"
-	"strings"
-	"time"
 
 	"github.com/bouncepaw/mycorrhiza/files"
 	"github.com/bouncepaw/mycorrhiza/util"
@@ -54,131 +50,6 @@ func InitGitRepo() {
 	}
 }
 
-// Revision represents a revision, duh. Hash is usually short. Username is extracted from email.
-type Revision struct {
-	Hash              string
-	Username          string
-	Time              time.Time
-	Message           string
-	filesAffectedBuf  []string
-	hyphaeAffectedBuf []string
-}
-
-// filesAffected tells what files have been affected by the revision.
-func (rev *Revision) filesAffected() (filenames []string) {
-	if nil != rev.filesAffectedBuf {
-		return rev.filesAffectedBuf
-	}
-	// List of files affected by this revision, one per line.
-	out, err := silentGitsh("diff-tree", "--no-commit-id", "--name-only", "-r", rev.Hash)
-	// There's an error? Well, whatever, let's just assign an empty slice, who cares.
-	if err != nil {
-		rev.filesAffectedBuf = []string{}
-	} else {
-		rev.filesAffectedBuf = strings.Split(out.String(), "\n")
-	}
-	return rev.filesAffectedBuf
-}
-
-// determine what hyphae were affected by this revision
-func (rev *Revision) hyphaeAffected() (hyphae []string) {
-	if nil != rev.hyphaeAffectedBuf {
-		return rev.hyphaeAffectedBuf
-	}
-	hyphae = make([]string, 0)
-	var (
-		// set is used to determine if a certain hypha has been already noted (hyphae are stored in 2 files at most currently).
-		set       = make(map[string]bool)
-		isNewName = func(hyphaName string) bool {
-			if _, present := set[hyphaName]; present {
-				return false
-			}
-			set[hyphaName] = true
-			return true
-		}
-		filesAffected = rev.filesAffected()
-	)
-	for _, filename := range filesAffected {
-		if strings.IndexRune(filename, '.') >= 0 {
-			dotPos := strings.LastIndexByte(filename, '.')
-			hyphaName := string([]byte(filename)[0:dotPos]) // is it safe?
-			if isNewName(hyphaName) {
-				hyphae = append(hyphae, hyphaName)
-			}
-		}
-	}
-	rev.hyphaeAffectedBuf = hyphae
-	return hyphae
-}
-
-// TimeString returns a human readable time representation.
-func (rev Revision) TimeString() string {
-	return rev.Time.Format(time.RFC822)
-}
-
-// HyphaeLinksHTML returns a comma-separated list of hyphae that were affected by this revision as HTML string.
-func (rev Revision) HyphaeLinksHTML() (html string) {
-	hyphae := rev.hyphaeAffected()
-	for i, hyphaName := range hyphae {
-		if i > 0 {
-			html += `<span aria-hidden="true">, </span>`
-		}
-		html += fmt.Sprintf(`<a href="/hypha/%[1]s">%[1]s</a>`, hyphaName)
-	}
-	return html
-}
-
-// descriptionForFeed generates a good enough HTML contents for a web feed.
-func (rev *Revision) descriptionForFeed() (htmlDesc string) {
-	return fmt.Sprintf(
-		`<p>%s</p>
-<p><b>Hyphae affected:</b> %s</p>
-<pre><code>%s</code></pre>`, rev.Message, rev.HyphaeLinksHTML(), html.EscapeString(rev.textDiff()))
-}
-
-// textDiff generates a good enough diff to display in a web feed. It is not html-escaped.
-func (rev *Revision) textDiff() (diff string) {
-	filenames, ok := rev.mycoFiles()
-	if !ok {
-		return "No text changes"
-	}
-	for _, filename := range filenames {
-		text, err := PrimitiveDiffAtRevision(filename, rev.Hash)
-		if err != nil {
-			diff += "\nAn error has occurred with " + filename + "\n"
-		}
-		diff += text + "\n"
-	}
-	return diff
-}
-
-// mycoFiles returns filenames of .myco file. It is not ok if there are no myco files.
-func (rev *Revision) mycoFiles() (filenames []string, ok bool) {
-	filenames = []string{}
-	for _, filename := range rev.filesAffected() {
-		if strings.HasSuffix(filename, ".myco") {
-			filenames = append(filenames, filename)
-		}
-	}
-	return filenames, len(filenames) > 0
-}
-
-// Try and guess what link is the most important by looking at the message.
-func (rev *Revision) bestLink() string {
-	var (
-		revs      = rev.hyphaeAffected()
-		renameRes = renameMsgPattern.FindStringSubmatch(rev.Message)
-	)
-	switch {
-	case renameRes != nil:
-		return "/hypha/" + renameRes[1]
-	case len(revs) == 0:
-		return ""
-	default:
-		return "/hypha/" + revs[0]
-	}
-}
-
 // I pronounce it as [gɪt͡ʃ].
 // gitsh is async-safe, therefore all other git-related functions in this module are too.
 func gitsh(args ...string) (out bytes.Buffer, err error) {
@@ -204,16 +75,6 @@ func silentGitsh(args ...string) (out bytes.Buffer, err error) {
 	return *bytes.NewBuffer(b), err
 }
 
-// Convert a UNIX timestamp as string into a time. If nil is returned, it means that the timestamp could not be converted.
-func unixTimestampAsTime(ts string) *time.Time {
-	i, err := strconv.ParseInt(ts, 10, 64)
-	if err != nil {
-		return nil
-	}
-	tm := time.Unix(i, 0)
-	return &tm
-}
-
 // Rename renames from `from` to `to` using `git mv`.
 func Rename(from, to string) error {
 	log.Println(util.ShorterPath(from), util.ShorterPath(to))

history/information.go

@@ -1,199 +0,0 @@
-package history
-
-// information.go
-// 	Things related to gathering existing information.
-import (
-	"fmt"
-	"log"
-	"regexp"
-	"strconv"
-	"strings"
-	"time"
-
-	"github.com/bouncepaw/mycorrhiza/cfg"
-	"github.com/bouncepaw/mycorrhiza/files"
-
-	"github.com/gorilla/feeds"
-)
-
-func recentChangesFeed() *feeds.Feed {
-	feed := &feeds.Feed{
-		Title:       "Recent changes",
-		Link:        &feeds.Link{Href: cfg.URL},
-		Description: "List of 30 recent changes on the wiki",
-		Author:      &feeds.Author{Name: "Wikimind", Email: "wikimind@mycorrhiza"},
-		Updated:     time.Now(),
-	}
-	var (
-		out, err = silentGitsh(
-			"log", "--oneline", "--no-merges",
-			"--pretty=format:\"%h\t%ae\t%at\t%s\"",
-			"--max-count=30",
-		)
-		revs []Revision
-	)
-	if err == nil {
-		for _, line := range strings.Split(out.String(), "\n") {
-			revs = append(revs, parseRevisionLine(line))
-		}
-	}
-	log.Printf("Found %d recent changes", len(revs))
-	for _, rev := range revs {
-		feed.Add(&feeds.Item{
-			Title:       rev.Message,
-			Author:      &feeds.Author{Name: rev.Username},
-			Id:          rev.Hash,
-			Description: rev.descriptionForFeed(),
-			Created:     rev.Time,
-			Updated:     rev.Time,
-			Link:        &feeds.Link{Href: cfg.URL + rev.bestLink()},
-		})
-	}
-	return feed
-}
-
-// RecentChangesRSS creates recent changes feed in RSS format.
-func RecentChangesRSS() (string, error) {
-	return recentChangesFeed().ToRss()
-}
-
-// RecentChangesAtom creates recent changes feed in Atom format.
-func RecentChangesAtom() (string, error) {
-	return recentChangesFeed().ToAtom()
-}
-
-// RecentChangesJSON creates recent changes feed in JSON format.
-func RecentChangesJSON() (string, error) {
-	return recentChangesFeed().ToJSON()
-}
-
-// RecentChanges gathers an arbitrary number of latest changes in form of revisions slice.
-func RecentChanges(n int) []Revision {
-	var (
-		out, err = silentGitsh(
-			"log", "--oneline", "--no-merges",
-			"--pretty=format:\"%h\t%ae\t%at\t%s\"",
-			"--max-count="+strconv.Itoa(n),
-		)
-		revs []Revision
-	)
-	if err == nil {
-		for _, line := range strings.Split(out.String(), "\n") {
-			revs = append(revs, parseRevisionLine(line))
-		}
-	}
-	log.Printf("Found %d recent changes", len(revs))
-	return revs
-}
-
-// FileChanged tells you if the file has been changed.
-func FileChanged(path string) bool {
-	_, err := gitsh("diff", "--exit-code", path)
-	return err != nil
-}
-
-// Revisions returns slice of revisions for the given hypha name.
-func Revisions(hyphaName string) ([]Revision, error) {
-	var (
-		out, err = silentGitsh(
-			"log", "--oneline", "--no-merges",
-			// Hash, author email, author time, commit msg separated by tab
-			"--pretty=format:\"%h\t%ae\t%at\t%s\"",
-			"--", hyphaName+".*",
-		)
-		revs []Revision
-	)
-	if err == nil {
-		for _, line := range strings.Split(out.String(), "\n") {
-			if line != "" {
-				revs = append(revs, parseRevisionLine(line))
-			}
-		}
-	}
-	log.Printf("Found %d revisions for ‘%s’\n", len(revs), hyphaName)
-	return revs, err
-}
-
-// WithRevisions returns an html representation of `revs` that is meant to be inserted in a history page.
-func WithRevisions(hyphaName string, revs []Revision) (html string) {
-	var (
-		currentYear  int
-		currentMonth time.Month
-	)
-	for i, rev := range revs {
-		if rev.Time.Month() != currentMonth || rev.Time.Year() != currentYear {
-			currentYear = rev.Time.Year()
-			currentMonth = rev.Time.Month()
-			if i != 0 {
-				html += `
-	</ul>
-</section>`
-			}
-			html += fmt.Sprintf(`
-<section class="history__month">
-	<a href="#%[1]d-%[2]d" class="history__month-anchor">
-		<h2 id="%[1]d-%[2]d" class="history__month-title">%[3]s</h2>
-	</a>
-	<ul class="history__entries">`,
-				currentYear, currentMonth,
-				strconv.Itoa(currentYear)+" "+rev.Time.Month().String())
-		}
-		html += rev.asHistoryEntry(hyphaName)
-	}
-	return html
-}
-
-func (rev *Revision) asHistoryEntry(hyphaName string) (html string) {
-	author := ""
-	if rev.Username != "anon" {
-		author = fmt.Sprintf(`
-		<span class="history-entry__author">by <a href="/hypha/%[1]s/%[2]s" rel="author">%[2]s</span>`, cfg.UserHypha, rev.Username)
-	}
-	return fmt.Sprintf(`
-<li class="history__entry">
-	<a class="history-entry" href="/rev/%[3]s/%[1]s">
-		<time class="history-entry__time">%[2]s</time>
-		<span class="history-entry__hash"><a href="/primitive-diff/%[3]s/%[1]s">%[3]s</a></span>
-		<span class="history-entry__msg">%[4]s</span>
-	</a>%[5]s
-</li>
-`, hyphaName, rev.timeToDisplay(), rev.Hash, rev.Message, author)
-}
-
-// Return time like mm-dd 13:42
-func (rev *Revision) timeToDisplay() string {
-	D := rev.Time.Day()
-	h, m, _ := rev.Time.Clock()
-	return fmt.Sprintf("%02d — %02d:%02d", D, h, m)
-}
-
-// This regex is wrapped in "". For some reason, these quotes appear at some time and we have to get rid of them.
-var revisionLinePattern = regexp.MustCompile("\"(.*)\t(.*)@.*\t(.*)\t(.*)\"")
-
-func parseRevisionLine(line string) Revision {
-	results := revisionLinePattern.FindStringSubmatch(line)
-	return Revision{
-		Hash:     results[1],
-		Username: results[2],
-		Time:     *unixTimestampAsTime(results[3]),
-		Message:  results[4],
-	}
-}
-
-// FileAtRevision shows how the file with the given file path looked at the commit with the hash. It may return an error if git fails.
-func FileAtRevision(filepath, hash string) (string, error) {
-	out, err := gitsh("show", hash+":"+strings.TrimPrefix(filepath, files.HyphaeDir()+"/"))
-	if err != nil {
-		return "", err
-	}
-	return out.String(), err
-}
-
-// PrimitiveDiffAtRevision generates a plain-text diff for the given filepath at the commit with the given hash. It may return an error if git fails.
-func PrimitiveDiffAtRevision(filepath, hash string) (string, error) {
-	out, err := silentGitsh("diff", "--unified=1", "--no-color", hash+"~", hash, "--", filepath)
-	if err != nil {
-		return "", err
-	}
-	return out.String(), err
-}

history/operations.go

@@ -95,9 +95,7 @@ func (hop *Op) WithFilesRenamed(pairs map[string]string) *Op {
 				hop.Errs = append(hop.Errs, err)
 				continue
 			}
-			if err := Rename(from, to); err != nil {
+			hop.gitop("mv", "--force", from, to)
-				hop.Errs = append(hop.Errs, err)
-			}
 		}
 	}
 	return hop

history/revision.go

@@ -0,0 +1,254 @@
+package history
+
+import (
+	"fmt"
+	"log"
+	"regexp"
+	"strconv"
+	"strings"
+	"time"
+
+	"github.com/bouncepaw/mycorrhiza/files"
+)
+
+// Revision represents a revision, duh. Hash is usually short. Username is extracted from email.
+type Revision struct {
+	Hash              string
+	Username          string
+	Time              time.Time
+	Message           string
+	filesAffectedBuf  []string
+	hyphaeAffectedBuf []string
+}
+
+// gitLog calls `git log` and parses the results.
+func gitLog(args ...string) ([]Revision, error) {
+	args = append([]string{
+		"log", "--abbrev-commit", "--no-merges",
+		"--pretty=format:%h\t%ae\t%at\t%s",
+	}, args...)
+	out, err := silentGitsh(args...)
+	if err != nil {
+		return nil, err
+	}
+
+	outStr := out.String()
+	if outStr == "" {
+		// if there are no commits to return
+		return nil, nil
+	}
+
+	var revs []Revision
+	for _, line := range strings.Split(outStr, "\n") {
+		revs = append(revs, parseRevisionLine(line))
+	}
+	return revs, nil
+}
+
+type recentChangesStream struct {
+	currHash string
+}
+
+func newRecentChangesStream() recentChangesStream {
+	// next returns the next n revisions from the stream, ordered most recent first.
+	// If there are less than n revisions remaining, it will return only those.
+	return recentChangesStream{currHash: ""}
+}
+
+func (stream *recentChangesStream) next(n int) []Revision {
+	args := []string{"--max-count=" + strconv.Itoa(n)}
+	if stream.currHash == "" {
+		args = append(args, "HEAD")
+	} else {
+		// currHash is the last revision from the last call, so skip it
+		args = append(args, "--skip=1", stream.currHash)
+	}
+	// I don't think this can fail, so ignore the error
+	res, _ := gitLog(args...)
+	if len(res) != 0 {
+		stream.currHash = res[len(res)-1].Hash
+	}
+	return res
+}
+
+// recentChangesIterator returns a function that returns successive revisions from the stream.
+// It buffers revisions to avoid calling git every time.
+func (stream recentChangesStream) iterator() func() (Revision, bool) {
+	var buf []Revision
+	return func() (Revision, bool) {
+		if len(buf) == 0 {
+			// no real reason to choose 30, just needs some large number
+			buf = stream.next(30)
+			if len(buf) == 0 {
+				// revs has no revisions left
+				return Revision{}, true
+			}
+		}
+		rev := buf[0]
+		buf = buf[1:]
+		return rev, false
+	}
+}
+
+// RecentChanges gathers an arbitrary number of latest changes in form of revisions slice, ordered most recent first.
+func RecentChanges(n int) []Revision {
+	stream := newRecentChangesStream()
+	revs := stream.next(n)
+	log.Printf("Found %d recent changes", len(revs))
+	return revs
+}
+
+// Revisions returns slice of revisions for the given hypha name, ordered most recent first.
+func Revisions(hyphaName string) ([]Revision, error) {
+	revs, err := gitLog("--", hyphaName+".*")
+	log.Printf("Found %d revisions for ‘%s’\n", len(revs), hyphaName)
+	return revs, err
+}
+
+// FileChanged tells you if the file has been changed since the last commit.
+func FileChanged(path string) bool {
+	_, err := gitsh("diff", "--exit-code", path)
+	return err != nil
+}
+
+// Return time like dd — 13:42
+func (rev *Revision) timeToDisplay() string {
+	D := rev.Time.Day()
+	h, m, _ := rev.Time.Clock()
+	return fmt.Sprintf("%02d — %02d:%02d", D, h, m)
+}
+
+var revisionLinePattern = regexp.MustCompile("(.*)\t(.*)@.*\t(.*)\t(.*)")
+
+// Convert a UNIX timestamp as string into a time. If nil is returned, it means that the timestamp could not be converted.
+func unixTimestampAsTime(ts string) *time.Time {
+	i, err := strconv.ParseInt(ts, 10, 64)
+	if err != nil {
+		return nil
+	}
+	tm := time.Unix(i, 0)
+	return &tm
+}
+
+func parseRevisionLine(line string) Revision {
+	results := revisionLinePattern.FindStringSubmatch(line)
+	return Revision{
+		Hash:     results[1],
+		Username: results[2],
+		Time:     *unixTimestampAsTime(results[3]),
+		Message:  results[4],
+	}
+}
+
+// filesAffected tells what files have been affected by the revision.
+func (rev *Revision) filesAffected() (filenames []string) {
+	if nil != rev.filesAffectedBuf {
+		return rev.filesAffectedBuf
+	}
+	// List of files affected by this revision, one per line.
+	out, err := silentGitsh("diff-tree", "--no-commit-id", "--name-only", "-r", rev.Hash)
+	// There's an error? Well, whatever, let's just assign an empty slice, who cares.
+	if err != nil {
+		rev.filesAffectedBuf = []string{}
+	} else {
+		rev.filesAffectedBuf = strings.Split(out.String(), "\n")
+	}
+	return rev.filesAffectedBuf
+}
+
+// determine what hyphae were affected by this revision
+func (rev *Revision) hyphaeAffected() (hyphae []string) {
+	if nil != rev.hyphaeAffectedBuf {
+		return rev.hyphaeAffectedBuf
+	}
+	hyphae = make([]string, 0)
+	var (
+		// set is used to determine if a certain hypha has been already noted (hyphae are stored in 2 files at most currently).
+		set       = make(map[string]bool)
+		isNewName = func(hyphaName string) bool {
+			if _, present := set[hyphaName]; present {
+				return false
+			}
+			set[hyphaName] = true
+			return true
+		}
+		filesAffected = rev.filesAffected()
+	)
+	for _, filename := range filesAffected {
+		if strings.IndexRune(filename, '.') >= 0 {
+			dotPos := strings.LastIndexByte(filename, '.')
+			hyphaName := string([]byte(filename)[0:dotPos]) // is it safe?
+			if isNewName(hyphaName) {
+				hyphae = append(hyphae, hyphaName)
+			}
+		}
+	}
+	rev.hyphaeAffectedBuf = hyphae
+	return hyphae
+}
+
+// TimeString returns a human readable time representation.
+func (rev Revision) TimeString() string {
+	return rev.Time.Format(time.RFC822)
+}
+
+// textDiff generates a good enough diff to display in a web feed. It is not html-escaped.
+func (rev *Revision) textDiff() (diff string) {
+	filenames, ok := rev.mycoFiles()
+	if !ok {
+		return "No text changes"
+	}
+	for _, filename := range filenames {
+		text, err := PrimitiveDiffAtRevision(filename, rev.Hash)
+		if err != nil {
+			diff += "\nAn error has occurred with " + filename + "\n"
+		}
+		diff += text + "\n"
+	}
+	return diff
+}
+
+// mycoFiles returns filenames of .myco file. It is not ok if there are no myco files.
+func (rev *Revision) mycoFiles() (filenames []string, ok bool) {
+	filenames = []string{}
+	for _, filename := range rev.filesAffected() {
+		if strings.HasSuffix(filename, ".myco") {
+			filenames = append(filenames, filename)
+		}
+	}
+	return filenames, len(filenames) > 0
+}
+
+// Try and guess what link is the most important by looking at the message.
+func (rev *Revision) bestLink() string {
+	var (
+		revs      = rev.hyphaeAffected()
+		renameRes = renameMsgPattern.FindStringSubmatch(rev.Message)
+	)
+	switch {
+	case renameRes != nil:
+		return "/hypha/" + renameRes[1]
+	case len(revs) == 0:
+		return ""
+	default:
+		return "/hypha/" + revs[0]
+	}
+}
+
+// FileAtRevision shows how the file with the given file path looked at the commit with the hash. It may return an error if git fails.
+func FileAtRevision(filepath, hash string) (string, error) {
+	out, err := gitsh("show", hash+":"+strings.TrimPrefix(filepath, files.HyphaeDir()+"/"))
+	if err != nil {
+		return "", err
+	}
+	return out.String(), err
+}
+
+// PrimitiveDiffAtRevision generates a plain-text diff for the given filepath at the commit with the given hash. It may return an error if git fails.
+func PrimitiveDiffAtRevision(filepath, hash string) (string, error) {
+	out, err := silentGitsh("diff", "--unified=1", "--no-color", hash+"~", hash, "--", filepath)
+	if err != nil {
+		return "", err
+	}
+	return out.String(), err
+}

history/view.qtpl

@@ -0,0 +1,55 @@
+{% import "fmt" %}
+{% import "github.com/bouncepaw/mycorrhiza/cfg" %}
+
+HyphaeLinksHTML returns a comma-separated list of hyphae that were affected by this revision as HTML string.
+{% func (rev Revision) HyphaeLinksHTML() %}
+{% stripspace %}
+	{% for i, hyphaName := range rev.hyphaeAffected() %}
+		{% if i > 0 %}
+			<span aria-hidden="true">, </span>
+		{% endif %}
+		<a href="/primitive-diff/{%s rev.Hash %}/{%s hyphaName %}">{%s hyphaName %}</a>
+	{% endfor %}
+{% endstripspace %}
+{% endfunc %}
+
+descriptionForFeed generates a good enough HTML contents for a web feed.
+{% func (rev *Revision) descriptionForFeed() %}
+<p><b>{%s rev.Message %}</b> (by {%s rev.Username %} at {%s rev.TimeString() %})</p>
+<p>Hyphae affected: {%= rev.HyphaeLinksHTML() %}</p>
+<pre><code>{%s rev.textDiff() %}</code></pre>
+{% endfunc %}
+
+WithRevisions returns an html representation of `revs` that is meant to be inserted in a history page.
+{% func WithRevisions(hyphaName string, revs []Revision) %}
+{% for _, grp := range groupRevisionsByMonth(revs) %}
+	{% code
+    currentYear := grp[0].Time.Year()
+    currentMonth := grp[0].Time.Month()
+    sectionId := fmt.Sprintf("%d-%d", currentYear, currentMonth)
+    %}
+<section class="history__month">
+	<a href="#{%s sectionId %}" class="history__month-anchor">
+		<h2 id="{%s sectionId %}" class="history__month-title">{%d currentYear %} {%s currentMonth.String() %}</h2>
+	</a>
+	<ul class="history__entries">
+        {% for _, rev := range grp %}
+            {%= rev.asHistoryEntry(hyphaName) %}
+        {% endfor %}
+	</ul>
+</section>
+{% endfor %}
+{% endfunc %}
+
+{% func (rev *Revision) asHistoryEntry(hyphaName string) %}
+<li class="history__entry">
+	<a class="history-entry" href="/rev/{%s rev.Hash %}/{%s hyphaName %}">
+        <time class="history-entry__time">{%s rev.timeToDisplay() %}</time>
+    </a>
+	<span class="history-entry__hash"><a href="/primitive-diff/{%s rev.Hash %}/{%s hyphaName %}">{%s rev.Hash %}</a></span>
+	<span class="history-entry__msg">{%s rev.Message %}</span>
+	{% if rev.Username != "anon" %}
+        <span class="history-entry__author">by <a href="/hypha/{%s cfg.UserHypha %}/{%s rev.Username %}" rel="author">{%s rev.Username %}</a></span>
+    {% endif %}
+</li>
+{% endfunc %}

history/view.qtpl.go

@@ -0,0 +1,330 @@
+// Code generated by qtc from "view.qtpl". DO NOT EDIT.
+// See https://github.com/valyala/quicktemplate for details.
+
+//line history/view.qtpl:1
+package history
+
+//line history/view.qtpl:1
+import "fmt"
+
+//line history/view.qtpl:2
+import "github.com/bouncepaw/mycorrhiza/cfg"
+
+// HyphaeLinksHTML returns a comma-separated list of hyphae that were affected by this revision as HTML string.
+
+//line history/view.qtpl:5
+import (
+	qtio422016 "io"
+
+	qt422016 "github.com/valyala/quicktemplate"
+)
+
+//line history/view.qtpl:5
+var (
+	_ = qtio422016.Copy
+	_ = qt422016.AcquireByteBuffer
+)
+
+//line history/view.qtpl:5
+func (rev Revision) StreamHyphaeLinksHTML(qw422016 *qt422016.Writer) {
+//line history/view.qtpl:5
+	qw422016.N().S(`
+`)
+//line history/view.qtpl:7
+	for i, hyphaName := range rev.hyphaeAffected() {
+//line history/view.qtpl:8
+		if i > 0 {
+//line history/view.qtpl:8
+			qw422016.N().S(`<span aria-hidden="true">, </span>`)
+//line history/view.qtpl:10
+		}
+//line history/view.qtpl:10
+		qw422016.N().S(`<a href="/primitive-diff/`)
+//line history/view.qtpl:11
+		qw422016.E().S(rev.Hash)
+//line history/view.qtpl:11
+		qw422016.N().S(`/`)
+//line history/view.qtpl:11
+		qw422016.E().S(hyphaName)
+//line history/view.qtpl:11
+		qw422016.N().S(`">`)
+//line history/view.qtpl:11
+		qw422016.E().S(hyphaName)
+//line history/view.qtpl:11
+		qw422016.N().S(`</a>`)
+//line history/view.qtpl:12
+	}
+//line history/view.qtpl:13
+	qw422016.N().S(`
+`)
+//line history/view.qtpl:14
+}
+
+//line history/view.qtpl:14
+func (rev Revision) WriteHyphaeLinksHTML(qq422016 qtio422016.Writer) {
+//line history/view.qtpl:14
+	qw422016 := qt422016.AcquireWriter(qq422016)
+//line history/view.qtpl:14
+	rev.StreamHyphaeLinksHTML(qw422016)
+//line history/view.qtpl:14
+	qt422016.ReleaseWriter(qw422016)
+//line history/view.qtpl:14
+}
+
+//line history/view.qtpl:14
+func (rev Revision) HyphaeLinksHTML() string {
+//line history/view.qtpl:14
+	qb422016 := qt422016.AcquireByteBuffer()
+//line history/view.qtpl:14
+	rev.WriteHyphaeLinksHTML(qb422016)
+//line history/view.qtpl:14
+	qs422016 := string(qb422016.B)
+//line history/view.qtpl:14
+	qt422016.ReleaseByteBuffer(qb422016)
+//line history/view.qtpl:14
+	return qs422016
+//line history/view.qtpl:14
+}
+
+// descriptionForFeed generates a good enough HTML contents for a web feed.
+
+//line history/view.qtpl:17
+func (rev *Revision) streamdescriptionForFeed(qw422016 *qt422016.Writer) {
+//line history/view.qtpl:17
+	qw422016.N().S(`
+<p><b>`)
+//line history/view.qtpl:18
+	qw422016.E().S(rev.Message)
+//line history/view.qtpl:18
+	qw422016.N().S(`</b> (by `)
+//line history/view.qtpl:18
+	qw422016.E().S(rev.Username)
+//line history/view.qtpl:18
+	qw422016.N().S(` at `)
+//line history/view.qtpl:18
+	qw422016.E().S(rev.TimeString())
+//line history/view.qtpl:18
+	qw422016.N().S(`)</p>
+<p>Hyphae affected: `)
+//line history/view.qtpl:19
+	rev.StreamHyphaeLinksHTML(qw422016)
+//line history/view.qtpl:19
+	qw422016.N().S(`</p>
+<pre><code>`)
+//line history/view.qtpl:20
+	qw422016.E().S(rev.textDiff())
+//line history/view.qtpl:20
+	qw422016.N().S(`</code></pre>
+`)
+//line history/view.qtpl:21
+}
+
+//line history/view.qtpl:21
+func (rev *Revision) writedescriptionForFeed(qq422016 qtio422016.Writer) {
+//line history/view.qtpl:21
+	qw422016 := qt422016.AcquireWriter(qq422016)
+//line history/view.qtpl:21
+	rev.streamdescriptionForFeed(qw422016)
+//line history/view.qtpl:21
+	qt422016.ReleaseWriter(qw422016)
+//line history/view.qtpl:21
+}
+
+//line history/view.qtpl:21
+func (rev *Revision) descriptionForFeed() string {
+//line history/view.qtpl:21
+	qb422016 := qt422016.AcquireByteBuffer()
+//line history/view.qtpl:21
+	rev.writedescriptionForFeed(qb422016)
+//line history/view.qtpl:21
+	qs422016 := string(qb422016.B)
+//line history/view.qtpl:21
+	qt422016.ReleaseByteBuffer(qb422016)
+//line history/view.qtpl:21
+	return qs422016
+//line history/view.qtpl:21
+}
+
+// WithRevisions returns an html representation of `revs` that is meant to be inserted in a history page.
+
+//line history/view.qtpl:24
+func StreamWithRevisions(qw422016 *qt422016.Writer, hyphaName string, revs []Revision) {
+//line history/view.qtpl:24
+	qw422016.N().S(`
+`)
+//line history/view.qtpl:25
+	for _, grp := range groupRevisionsByMonth(revs) {
+//line history/view.qtpl:25
+		qw422016.N().S(`
+	`)
+//line history/view.qtpl:27
+		currentYear := grp[0].Time.Year()
+		currentMonth := grp[0].Time.Month()
+		sectionId := fmt.Sprintf("%d-%d", currentYear, currentMonth)
+
+//line history/view.qtpl:30
+		qw422016.N().S(`
+<section class="history__month">
+	<a href="#`)
+//line history/view.qtpl:32
+		qw422016.E().S(sectionId)
+//line history/view.qtpl:32
+		qw422016.N().S(`" class="history__month-anchor">
+		<h2 id="`)
+//line history/view.qtpl:33
+		qw422016.E().S(sectionId)
+//line history/view.qtpl:33
+		qw422016.N().S(`" class="history__month-title">`)
+//line history/view.qtpl:33
+		qw422016.N().D(currentYear)
+//line history/view.qtpl:33
+		qw422016.N().S(` `)
+//line history/view.qtpl:33
+		qw422016.E().S(currentMonth.String())
+//line history/view.qtpl:33
+		qw422016.N().S(`</h2>
+	</a>
+	<ul class="history__entries">
+        `)
+//line history/view.qtpl:36
+		for _, rev := range grp {
+//line history/view.qtpl:36
+			qw422016.N().S(`
+            `)
+//line history/view.qtpl:37
+			rev.streamasHistoryEntry(qw422016, hyphaName)
+//line history/view.qtpl:37
+			qw422016.N().S(`
+        `)
+//line history/view.qtpl:38
+		}
+//line history/view.qtpl:38
+		qw422016.N().S(`
+	</ul>
+</section>
+`)
+//line history/view.qtpl:41
+	}
+//line history/view.qtpl:41
+	qw422016.N().S(`
+`)
+//line history/view.qtpl:42
+}
+
+//line history/view.qtpl:42
+func WriteWithRevisions(qq422016 qtio422016.Writer, hyphaName string, revs []Revision) {
+//line history/view.qtpl:42
+	qw422016 := qt422016.AcquireWriter(qq422016)
+//line history/view.qtpl:42
+	StreamWithRevisions(qw422016, hyphaName, revs)
+//line history/view.qtpl:42
+	qt422016.ReleaseWriter(qw422016)
+//line history/view.qtpl:42
+}
+
+//line history/view.qtpl:42
+func WithRevisions(hyphaName string, revs []Revision) string {
+//line history/view.qtpl:42
+	qb422016 := qt422016.AcquireByteBuffer()
+//line history/view.qtpl:42
+	WriteWithRevisions(qb422016, hyphaName, revs)
+//line history/view.qtpl:42
+	qs422016 := string(qb422016.B)
+//line history/view.qtpl:42
+	qt422016.ReleaseByteBuffer(qb422016)
+//line history/view.qtpl:42
+	return qs422016
+//line history/view.qtpl:42
+}
+
+//line history/view.qtpl:44
+func (rev *Revision) streamasHistoryEntry(qw422016 *qt422016.Writer, hyphaName string) {
+//line history/view.qtpl:44
+	qw422016.N().S(`
+<li class="history__entry">
+	<a class="history-entry" href="/rev/`)
+//line history/view.qtpl:46
+	qw422016.E().S(rev.Hash)
+//line history/view.qtpl:46
+	qw422016.N().S(`/`)
+//line history/view.qtpl:46
+	qw422016.E().S(hyphaName)
+//line history/view.qtpl:46
+	qw422016.N().S(`">
+        <time class="history-entry__time">`)
+//line history/view.qtpl:47
+	qw422016.E().S(rev.timeToDisplay())
+//line history/view.qtpl:47
+	qw422016.N().S(`</time>
+    </a>
+	<span class="history-entry__hash"><a href="/primitive-diff/`)
+//line history/view.qtpl:49
+	qw422016.E().S(rev.Hash)
+//line history/view.qtpl:49
+	qw422016.N().S(`/`)
+//line history/view.qtpl:49
+	qw422016.E().S(hyphaName)
+//line history/view.qtpl:49
+	qw422016.N().S(`">`)
+//line history/view.qtpl:49
+	qw422016.E().S(rev.Hash)
+//line history/view.qtpl:49
+	qw422016.N().S(`</a></span>
+	<span class="history-entry__msg">`)
+//line history/view.qtpl:50
+	qw422016.E().S(rev.Message)
+//line history/view.qtpl:50
+	qw422016.N().S(`</span>
+	`)
+//line history/view.qtpl:51
+	if rev.Username != "anon" {
+//line history/view.qtpl:51
+		qw422016.N().S(`
+        <span class="history-entry__author">by <a href="/hypha/`)
+//line history/view.qtpl:52
+		qw422016.E().S(cfg.UserHypha)
+//line history/view.qtpl:52
+		qw422016.N().S(`/`)
+//line history/view.qtpl:52
+		qw422016.E().S(rev.Username)
+//line history/view.qtpl:52
+		qw422016.N().S(`" rel="author">`)
+//line history/view.qtpl:52
+		qw422016.E().S(rev.Username)
+//line history/view.qtpl:52
+		qw422016.N().S(`</a></span>
+    `)
+//line history/view.qtpl:53
+	}
+//line history/view.qtpl:53
+	qw422016.N().S(`
+</li>
+`)
+//line history/view.qtpl:55
+}
+
+//line history/view.qtpl:55
+func (rev *Revision) writeasHistoryEntry(qq422016 qtio422016.Writer, hyphaName string) {
+//line history/view.qtpl:55
+	qw422016 := qt422016.AcquireWriter(qq422016)
+//line history/view.qtpl:55
+	rev.streamasHistoryEntry(qw422016, hyphaName)
+//line history/view.qtpl:55
+	qt422016.ReleaseWriter(qw422016)
+//line history/view.qtpl:55
+}
+
+//line history/view.qtpl:55
+func (rev *Revision) asHistoryEntry(hyphaName string) string {
+//line history/view.qtpl:55
+	qb422016 := qt422016.AcquireByteBuffer()
+//line history/view.qtpl:55
+	rev.writeasHistoryEntry(qb422016, hyphaName)
+//line history/view.qtpl:55
+	qs422016 := string(qb422016.B)
+//line history/view.qtpl:55
+	qt422016.ReleaseByteBuffer(qb422016)
+//line history/view.qtpl:55
+	return qs422016
+//line history/view.qtpl:55
+}

l18n/l18n.go

@@ -102,6 +102,7 @@ var localizations = map[string]string{
 	"en.help.empty_error_link":      "contributing",
 	"en.help.empty_error_title":     "This entry does not exist!",
 	"en.help.entry_not_found":       "Entry not found",
+	"en.help.feeds":                 "Feeds",
 	"en.help.hypha":                 "Hypha",
 	"en.help.interface":             "Interface",
 	"en.help.lock":                  "Lock",

l18n_src/en/help.json

@@ -18,6 +18,7 @@
 	"sibling_hyphae": "Sibling hyphae",
 	"special_pages": "Special pages",
 	"recent_changes": "Recent changes",
+	"feeds": "Feeds",
 	"configuration": "Configuration (for administrators)",
 	"lock": "Lock",
 	"whitelist": "Whitelist",

main.go

@@ -1,5 +1,6 @@
 //go:generate qtc -dir=views
 //go:generate qtc -dir=tree
+//go:generate qtc -dir=history
 //go:generate go-localize -input l18n_src -output l18n
 // Command mycorrhiza is a program that runs a mycorrhiza wiki.
 package main

tree/tree.go

@@ -96,7 +96,7 @@ func Tree(hyphaName string) (siblingsHTML, childrenHTML, prev, next string) {
 		wg.Done()
 	}()
 	go func() {
-		children = figureOutChildren(hyphaName, true).children
+		children = figureOutChildren(hyphaName).children
 		wg.Done()
 	}()
 	wg.Wait()
@@ -124,7 +124,7 @@ type child struct {
 	children []child
 }
 
-func figureOutChildren(hyphaName string, exists bool) child {
+func figureOutChildren(hyphaName string) child {
 	var (
 		descPrefix = hyphaName + "/"
 		child      = child{hyphaName, true, make([]child, 0)}

views/stuff.qtpl

@@ -176,6 +176,7 @@ It outputs a poorly formatted JSON, but it works and is valid.
 		<li>{%s lc.GetWithLocale(lang, "help.special_pages") %}
 			<ul>
 				<li><a href="/help/{%s lang %}/recent_changes">{%s lc.GetWithLocale(lang, "help.recent_changes") %}</a></li>
+				<li><a href="/help/{%s lang %}/feeds">{%s lc.GetWithLocale(lang, "help.feeds") %}</a></li>
 			</ul>
 		</li>
 		<li>{%s lc.GetWithLocale(lang, "help.configuration") %}

views/stuff.qtpl.go

@@ -707,41 +707,50 @@ func streamhelpTopicsHTML(qw422016 *qt422016.Writer, lang string, lc *l18n.Local
 //line views/stuff.qtpl:178
 	qw422016.E().S(lc.GetWithLocale(lang, "help.recent_changes"))
 //line views/stuff.qtpl:178
+	qw422016.N().S(`</a></li>
+				<li><a href="/help/`)
+//line views/stuff.qtpl:179
+	qw422016.E().S(lang)
+//line views/stuff.qtpl:179
+	qw422016.N().S(`/feeds">`)
+//line views/stuff.qtpl:179
+	qw422016.E().S(lc.GetWithLocale(lang, "help.feeds"))
+//line views/stuff.qtpl:179
 	qw422016.N().S(`</a></li>
 			</ul>
 		</li>
 		<li>`)
-//line views/stuff.qtpl:181
+//line views/stuff.qtpl:182
 	qw422016.E().S(lc.GetWithLocale(lang, "help.configuration"))
-//line views/stuff.qtpl:181
+//line views/stuff.qtpl:182
 	qw422016.N().S(`
 			<ul>
 				<li><a href="/help/`)
-//line views/stuff.qtpl:183
+//line views/stuff.qtpl:184
 	qw422016.E().S(lang)
-//line views/stuff.qtpl:183
+//line views/stuff.qtpl:184
 	qw422016.N().S(`/lock">`)
-//line views/stuff.qtpl:183
+//line views/stuff.qtpl:184
 	qw422016.E().S(lc.GetWithLocale(lang, "help.lock"))
-//line views/stuff.qtpl:183
+//line views/stuff.qtpl:184
 	qw422016.N().S(`</a></li>
 				<li><a href="/help/`)
-//line views/stuff.qtpl:184
+//line views/stuff.qtpl:185
 	qw422016.E().S(lang)
-//line views/stuff.qtpl:184
+//line views/stuff.qtpl:185
 	qw422016.N().S(`/whitelist">`)
-//line views/stuff.qtpl:184
+//line views/stuff.qtpl:185
 	qw422016.E().S(lc.GetWithLocale(lang, "help.whitelist"))
-//line views/stuff.qtpl:184
+//line views/stuff.qtpl:185
 	qw422016.N().S(`</a></li>
 				<li><a href="/help/`)
-//line views/stuff.qtpl:185
+//line views/stuff.qtpl:186
 	qw422016.E().S(lang)
-//line views/stuff.qtpl:185
+//line views/stuff.qtpl:186
 	qw422016.N().S(`/telegram">`)
-//line views/stuff.qtpl:185
+//line views/stuff.qtpl:186
 	qw422016.E().S(lc.GetWithLocale(lang, "help.telegram"))
-//line views/stuff.qtpl:185
+//line views/stuff.qtpl:186
 	qw422016.N().S(`</a></li>
 				<li>...</li>
 			</ul>
@@ -749,91 +758,91 @@ func streamhelpTopicsHTML(qw422016 *qt422016.Writer, lang string, lc *l18n.Local
 	</ul>
 </aside>
 `)
-//line views/stuff.qtpl:191
+//line views/stuff.qtpl:192
 }
 
-//line views/stuff.qtpl:191
+//line views/stuff.qtpl:192
 func writehelpTopicsHTML(qq422016 qtio422016.Writer, lang string, lc *l18n.Localizer) {
-//line views/stuff.qtpl:191
+//line views/stuff.qtpl:192
 	qw422016 := qt422016.AcquireWriter(qq422016)
-//line views/stuff.qtpl:191
+//line views/stuff.qtpl:192
 	streamhelpTopicsHTML(qw422016, lang, lc)
-//line views/stuff.qtpl:191
+//line views/stuff.qtpl:192
 	qt422016.ReleaseWriter(qw422016)
-//line views/stuff.qtpl:191
+//line views/stuff.qtpl:192
 }
 
-//line views/stuff.qtpl:191
+//line views/stuff.qtpl:192
 func helpTopicsHTML(lang string, lc *l18n.Localizer) string {
-//line views/stuff.qtpl:191
+//line views/stuff.qtpl:192
 	qb422016 := qt422016.AcquireByteBuffer()
-//line views/stuff.qtpl:191
+//line views/stuff.qtpl:192
 	writehelpTopicsHTML(qb422016, lang, lc)
-//line views/stuff.qtpl:191
+//line views/stuff.qtpl:192
 	qs422016 := string(qb422016.B)
-//line views/stuff.qtpl:191
+//line views/stuff.qtpl:192
 	qt422016.ReleaseByteBuffer(qb422016)
-//line views/stuff.qtpl:191
+//line views/stuff.qtpl:192
 	return qs422016
-//line views/stuff.qtpl:191
+//line views/stuff.qtpl:192
 }
 
-//line views/stuff.qtpl:193
+//line views/stuff.qtpl:194
 func streamhelpTopicBadgeHTML(qw422016 *qt422016.Writer, lang, topic string) {
-//line views/stuff.qtpl:193
+//line views/stuff.qtpl:194
 	qw422016.N().S(`
 <a class="help-topic-badge" href="/help/`)
-//line views/stuff.qtpl:194
+//line views/stuff.qtpl:195
 	qw422016.E().S(lang)
-//line views/stuff.qtpl:194
+//line views/stuff.qtpl:195
 	qw422016.N().S(`/`)
-//line views/stuff.qtpl:194
+//line views/stuff.qtpl:195
 	qw422016.E().S(topic)
-//line views/stuff.qtpl:194
+//line views/stuff.qtpl:195
 	qw422016.N().S(`">?</a>
 `)
-//line views/stuff.qtpl:195
+//line views/stuff.qtpl:196
 }
 
-//line views/stuff.qtpl:195
+//line views/stuff.qtpl:196
 func writehelpTopicBadgeHTML(qq422016 qtio422016.Writer, lang, topic string) {
-//line views/stuff.qtpl:195
+//line views/stuff.qtpl:196
 	qw422016 := qt422016.AcquireWriter(qq422016)
-//line views/stuff.qtpl:195
+//line views/stuff.qtpl:196
 	streamhelpTopicBadgeHTML(qw422016, lang, topic)
-//line views/stuff.qtpl:195
+//line views/stuff.qtpl:196
 	qt422016.ReleaseWriter(qw422016)
-//line views/stuff.qtpl:195
+//line views/stuff.qtpl:196
 }
 
-//line views/stuff.qtpl:195
+//line views/stuff.qtpl:196
 func helpTopicBadgeHTML(lang, topic string) string {
-//line views/stuff.qtpl:195
+//line views/stuff.qtpl:196
 	qb422016 := qt422016.AcquireByteBuffer()
-//line views/stuff.qtpl:195
+//line views/stuff.qtpl:196
 	writehelpTopicBadgeHTML(qb422016, lang, topic)
-//line views/stuff.qtpl:195
+//line views/stuff.qtpl:196
 	qs422016 := string(qb422016.B)
-//line views/stuff.qtpl:195
+//line views/stuff.qtpl:196
 	qt422016.ReleaseByteBuffer(qb422016)
-//line views/stuff.qtpl:195
+//line views/stuff.qtpl:196
 	return qs422016
-//line views/stuff.qtpl:195
+//line views/stuff.qtpl:196
 }
 
-//line views/stuff.qtpl:197
+//line views/stuff.qtpl:198
 func StreamUserListHTML(qw422016 *qt422016.Writer, lc *l18n.Localizer) {
-//line views/stuff.qtpl:197
+//line views/stuff.qtpl:198
 	qw422016.N().S(`
 <div class="layout">
 <main class="main-width user-list">
 	<h1>`)
-//line views/stuff.qtpl:200
+//line views/stuff.qtpl:201
 	qw422016.E().S(lc.Get("ui.users_heading"))
-//line views/stuff.qtpl:200
+//line views/stuff.qtpl:201
 	qw422016.N().S(`</h1>
 `)
-//line views/stuff.qtpl:202
+//line views/stuff.qtpl:203
 	var (
 		admins     = make([]string, 0)
 		moderators = make([]string, 0)
@@ -853,149 +862,149 @@ func StreamUserListHTML(qw422016 *qt422016.Writer, lc *l18n.Localizer) {
 	sort.Strings(moderators)
 	sort.Strings(editors)
 
-//line views/stuff.qtpl:220
+//line views/stuff.qtpl:221
 	qw422016.N().S(`
 	<section>
 		<h2>`)
-//line views/stuff.qtpl:222
+//line views/stuff.qtpl:223
 	qw422016.E().S(lc.Get("ui.users_admins"))
-//line views/stuff.qtpl:222
+//line views/stuff.qtpl:223
 	qw422016.N().S(`</h2>
 		<ol>`)
-//line views/stuff.qtpl:223
+//line views/stuff.qtpl:224
 	for _, name := range admins {
-//line views/stuff.qtpl:223
+//line views/stuff.qtpl:224
 		qw422016.N().S(`
 			<li><a href="/hypha/`)
-//line views/stuff.qtpl:224
+//line views/stuff.qtpl:225
 		qw422016.E().S(cfg.UserHypha)
-//line views/stuff.qtpl:224
+//line views/stuff.qtpl:225
 		qw422016.N().S(`/`)
-//line views/stuff.qtpl:224
+//line views/stuff.qtpl:225
 		qw422016.E().S(name)
-//line views/stuff.qtpl:224
+//line views/stuff.qtpl:225
 		qw422016.N().S(`">`)
-//line views/stuff.qtpl:224
+//line views/stuff.qtpl:225
 		qw422016.E().S(name)
-//line views/stuff.qtpl:224
+//line views/stuff.qtpl:225
 		qw422016.N().S(`</a></li>
 		`)
-//line views/stuff.qtpl:225
+//line views/stuff.qtpl:226
 	}
-//line views/stuff.qtpl:225
+//line views/stuff.qtpl:226
 	qw422016.N().S(`</ol>
 	</section>
 	<section>
 		<h2>`)
-//line views/stuff.qtpl:228
+//line views/stuff.qtpl:229
 	qw422016.E().S(lc.Get("ui.users_moderators"))
-//line views/stuff.qtpl:228
+//line views/stuff.qtpl:229
 	qw422016.N().S(`</h2>
 		<ol>`)
-//line views/stuff.qtpl:229
+//line views/stuff.qtpl:230
 	for _, name := range moderators {
-//line views/stuff.qtpl:229
+//line views/stuff.qtpl:230
 		qw422016.N().S(`
 			<li><a href="/hypha/`)
-//line views/stuff.qtpl:230
+//line views/stuff.qtpl:231
 		qw422016.E().S(cfg.UserHypha)
-//line views/stuff.qtpl:230
+//line views/stuff.qtpl:231
 		qw422016.N().S(`/`)
-//line views/stuff.qtpl:230
+//line views/stuff.qtpl:231
 		qw422016.E().S(name)
-//line views/stuff.qtpl:230
+//line views/stuff.qtpl:231
 		qw422016.N().S(`">`)
-//line views/stuff.qtpl:230
+//line views/stuff.qtpl:231
 		qw422016.E().S(name)
-//line views/stuff.qtpl:230
+//line views/stuff.qtpl:231
 		qw422016.N().S(`</a></li>
 		`)
-//line views/stuff.qtpl:231
+//line views/stuff.qtpl:232
 	}
-//line views/stuff.qtpl:231
+//line views/stuff.qtpl:232
 	qw422016.N().S(`</ol>
 	</section>
 	<section>
 		<h2>`)
-//line views/stuff.qtpl:234
+//line views/stuff.qtpl:235
 	qw422016.E().S(lc.Get("ui.users_editors"))
-//line views/stuff.qtpl:234
+//line views/stuff.qtpl:235
 	qw422016.N().S(`</h2>
 		<ol>`)
-//line views/stuff.qtpl:235
+//line views/stuff.qtpl:236
 	for _, name := range editors {
-//line views/stuff.qtpl:235
+//line views/stuff.qtpl:236
 		qw422016.N().S(`
 			<li><a href="/hypha/`)
-//line views/stuff.qtpl:236
+//line views/stuff.qtpl:237
 		qw422016.E().S(cfg.UserHypha)
-//line views/stuff.qtpl:236
+//line views/stuff.qtpl:237
 		qw422016.N().S(`/`)
-//line views/stuff.qtpl:236
+//line views/stuff.qtpl:237
 		qw422016.E().S(name)
-//line views/stuff.qtpl:236
+//line views/stuff.qtpl:237
 		qw422016.N().S(`">`)
-//line views/stuff.qtpl:236
+//line views/stuff.qtpl:237
 		qw422016.E().S(name)
-//line views/stuff.qtpl:236
+//line views/stuff.qtpl:237
 		qw422016.N().S(`</a></li>
 		`)
-//line views/stuff.qtpl:237
+//line views/stuff.qtpl:238
 	}
-//line views/stuff.qtpl:237
+//line views/stuff.qtpl:238
 	qw422016.N().S(`</ol>
 	</section>
 </main>
 </div>
 `)
-//line views/stuff.qtpl:241
+//line views/stuff.qtpl:242
 }
 
-//line views/stuff.qtpl:241
+//line views/stuff.qtpl:242
 func WriteUserListHTML(qq422016 qtio422016.Writer, lc *l18n.Localizer) {
-//line views/stuff.qtpl:241
+//line views/stuff.qtpl:242
 	qw422016 := qt422016.AcquireWriter(qq422016)
-//line views/stuff.qtpl:241
+//line views/stuff.qtpl:242
 	StreamUserListHTML(qw422016, lc)
-//line views/stuff.qtpl:241
+//line views/stuff.qtpl:242
 	qt422016.ReleaseWriter(qw422016)
-//line views/stuff.qtpl:241
+//line views/stuff.qtpl:242
 }
 
-//line views/stuff.qtpl:241
+//line views/stuff.qtpl:242
 func UserListHTML(lc *l18n.Localizer) string {
-//line views/stuff.qtpl:241
+//line views/stuff.qtpl:242
 	qb422016 := qt422016.AcquireByteBuffer()
-//line views/stuff.qtpl:241
+//line views/stuff.qtpl:242
 	WriteUserListHTML(qb422016, lc)
-//line views/stuff.qtpl:241
+//line views/stuff.qtpl:242
 	qs422016 := string(qb422016.B)
-//line views/stuff.qtpl:241
+//line views/stuff.qtpl:242
 	qt422016.ReleaseByteBuffer(qb422016)
-//line views/stuff.qtpl:241
+//line views/stuff.qtpl:242
 	return qs422016
-//line views/stuff.qtpl:241
+//line views/stuff.qtpl:242
 }
 
-//line views/stuff.qtpl:243
+//line views/stuff.qtpl:244
 func StreamHyphaListHTML(qw422016 *qt422016.Writer, lc *l18n.Localizer) {
-//line views/stuff.qtpl:243
+//line views/stuff.qtpl:244
 	qw422016.N().S(`
 <div class="layout">
 <main class="main-width">
 	<h1>`)
-//line views/stuff.qtpl:246
+//line views/stuff.qtpl:247
 	qw422016.E().S(lc.Get("ui.list_heading"))
-//line views/stuff.qtpl:246
+//line views/stuff.qtpl:247
 	qw422016.N().S(`</h1>
 	<p>`)
-//line views/stuff.qtpl:247
+//line views/stuff.qtpl:248
 	qw422016.E().S(lc.GetPlural("ui.list_desc", hyphae.Count()))
-//line views/stuff.qtpl:247
+//line views/stuff.qtpl:248
 	qw422016.N().S(`</p>
 	<ul class="hypha-list">
 		`)
-//line views/stuff.qtpl:250
+//line views/stuff.qtpl:251
 	hyphaNames := make(chan string)
 	sortedHypha := hyphae.PathographicSort(hyphaNames)
 	for hypha := range hyphae.YieldExistingHyphae() {
@@ -1003,252 +1012,252 @@ func StreamHyphaListHTML(qw422016 *qt422016.Writer, lc *l18n.Localizer) {
 	}
 	close(hyphaNames)
 
-//line views/stuff.qtpl:256
+//line views/stuff.qtpl:257
 	qw422016.N().S(`
 		`)
-//line views/stuff.qtpl:257
+//line views/stuff.qtpl:258
 	for hyphaName := range sortedHypha {
-//line views/stuff.qtpl:257
+//line views/stuff.qtpl:258
 		qw422016.N().S(`
 		`)
-//line views/stuff.qtpl:258
+//line views/stuff.qtpl:259
 		hypha := hyphae.ByName(hyphaName)
 
-//line views/stuff.qtpl:258
+//line views/stuff.qtpl:259
 		qw422016.N().S(`
 		<li class="hypha-list__entry">
 			<a class="hypha-list__link" href="/hypha/`)
-//line views/stuff.qtpl:260
+//line views/stuff.qtpl:261
 		qw422016.E().S(hypha.Name)
-//line views/stuff.qtpl:260
+//line views/stuff.qtpl:261
 		qw422016.N().S(`">`)
-//line views/stuff.qtpl:260
+//line views/stuff.qtpl:261
 		qw422016.E().S(util.BeautifulName(hypha.Name))
-//line views/stuff.qtpl:260
+//line views/stuff.qtpl:261
 		qw422016.N().S(`</a>
 			`)
-//line views/stuff.qtpl:261
+//line views/stuff.qtpl:262
 		if hypha.BinaryPath != "" {
-//line views/stuff.qtpl:261
+//line views/stuff.qtpl:262
 			qw422016.N().S(`
 			<span class="hypha-list__amnt-type">`)
-//line views/stuff.qtpl:262
+//line views/stuff.qtpl:263
 			qw422016.E().S(filepath.Ext(hypha.BinaryPath)[1:])
-//line views/stuff.qtpl:262
+//line views/stuff.qtpl:263
 			qw422016.N().S(`</span>
 			`)
-//line views/stuff.qtpl:263
+//line views/stuff.qtpl:264
 		}
-//line views/stuff.qtpl:263
+//line views/stuff.qtpl:264
 		qw422016.N().S(`
 		</li>
 		`)
-//line views/stuff.qtpl:265
+//line views/stuff.qtpl:266
 	}
-//line views/stuff.qtpl:265
+//line views/stuff.qtpl:266
 	qw422016.N().S(`
 	</ul>
 </main>
 </div>
 `)
-//line views/stuff.qtpl:269
+//line views/stuff.qtpl:270
 }
 
-//line views/stuff.qtpl:269
+//line views/stuff.qtpl:270
 func WriteHyphaListHTML(qq422016 qtio422016.Writer, lc *l18n.Localizer) {
-//line views/stuff.qtpl:269
+//line views/stuff.qtpl:270
 	qw422016 := qt422016.AcquireWriter(qq422016)
-//line views/stuff.qtpl:269
+//line views/stuff.qtpl:270
 	StreamHyphaListHTML(qw422016, lc)
-//line views/stuff.qtpl:269
+//line views/stuff.qtpl:270
 	qt422016.ReleaseWriter(qw422016)
-//line views/stuff.qtpl:269
+//line views/stuff.qtpl:270
 }
 
-//line views/stuff.qtpl:269
+//line views/stuff.qtpl:270
 func HyphaListHTML(lc *l18n.Localizer) string {
-//line views/stuff.qtpl:269
+//line views/stuff.qtpl:270
 	qb422016 := qt422016.AcquireByteBuffer()
-//line views/stuff.qtpl:269
+//line views/stuff.qtpl:270
 	WriteHyphaListHTML(qb422016, lc)
-//line views/stuff.qtpl:269
+//line views/stuff.qtpl:270
 	qs422016 := string(qb422016.B)
-//line views/stuff.qtpl:269
+//line views/stuff.qtpl:270
 	qt422016.ReleaseByteBuffer(qb422016)
-//line views/stuff.qtpl:269
+//line views/stuff.qtpl:270
 	return qs422016
-//line views/stuff.qtpl:269
+//line views/stuff.qtpl:270
 }
 
-//line views/stuff.qtpl:271
+//line views/stuff.qtpl:272
 func StreamAboutHTML(qw422016 *qt422016.Writer, lc *l18n.Localizer) {
-//line views/stuff.qtpl:271
+//line views/stuff.qtpl:272
 	qw422016.N().S(`
 <div class="layout">
 <main class="main-width">
 	<section>
 		<h1>`)
-//line views/stuff.qtpl:275
+//line views/stuff.qtpl:276
 	qw422016.E().S(lc.Get("ui.about_title", &l18n.Replacements{"name": cfg.WikiName}))
-//line views/stuff.qtpl:275
+//line views/stuff.qtpl:276
 	qw422016.N().S(`</h1>
 		<ul>
 			<li><b>`)
-//line views/stuff.qtpl:277
+//line views/stuff.qtpl:278
 	qw422016.N().S(lc.Get("ui.about_version", &l18n.Replacements{"pre": "<a href=\"https://mycorrhiza.wiki\">", "post": "</a>"}))
-//line views/stuff.qtpl:277
+//line views/stuff.qtpl:278
 	qw422016.N().S(`</b> 1.5.0</li>
 `)
-//line views/stuff.qtpl:278
+//line views/stuff.qtpl:279
 	if cfg.UseAuth {
-//line views/stuff.qtpl:278
+//line views/stuff.qtpl:279
 		qw422016.N().S(`			<li><b>`)
-//line views/stuff.qtpl:279
+//line views/stuff.qtpl:280
 		qw422016.E().S(lc.Get("ui.about_usercount"))
-//line views/stuff.qtpl:279
+//line views/stuff.qtpl:280
 		qw422016.N().S(`</b> `)
-//line views/stuff.qtpl:279
+//line views/stuff.qtpl:280
 		qw422016.N().DUL(user.Count())
-//line views/stuff.qtpl:279
+//line views/stuff.qtpl:280
 		qw422016.N().S(`</li>
 			<li><b>`)
-//line views/stuff.qtpl:280
+//line views/stuff.qtpl:281
 		qw422016.E().S(lc.Get("ui.about_homepage"))
-//line views/stuff.qtpl:280
+//line views/stuff.qtpl:281
 		qw422016.N().S(`</b> <a href="/">`)
-//line views/stuff.qtpl:280
+//line views/stuff.qtpl:281
 		qw422016.E().S(cfg.HomeHypha)
-//line views/stuff.qtpl:280
+//line views/stuff.qtpl:281
 		qw422016.N().S(`</a></li>
 			<li><b>`)
-//line views/stuff.qtpl:281
+//line views/stuff.qtpl:282
 		qw422016.E().S(lc.Get("ui.about_admins"))
-//line views/stuff.qtpl:281
+//line views/stuff.qtpl:282
 		qw422016.N().S(`</b>`)
-//line views/stuff.qtpl:281
+//line views/stuff.qtpl:282
 		for i, username := range user.ListUsersWithGroup("admin") {
-//line views/stuff.qtpl:282
+//line views/stuff.qtpl:283
 			if i > 0 {
-//line views/stuff.qtpl:282
+//line views/stuff.qtpl:283
 				qw422016.N().S(`<span aria-hidden="true">, </span>
 `)
-//line views/stuff.qtpl:283
+//line views/stuff.qtpl:284
 			}
-//line views/stuff.qtpl:283
+//line views/stuff.qtpl:284
 			qw422016.N().S(`				<a href="/hypha/`)
-//line views/stuff.qtpl:284
+//line views/stuff.qtpl:285
 			qw422016.E().S(cfg.UserHypha)
-//line views/stuff.qtpl:284
+//line views/stuff.qtpl:285
 			qw422016.N().S(`/`)
-//line views/stuff.qtpl:284
+//line views/stuff.qtpl:285
 			qw422016.E().S(username)
-//line views/stuff.qtpl:284
+//line views/stuff.qtpl:285
 			qw422016.N().S(`">`)
-//line views/stuff.qtpl:284
+//line views/stuff.qtpl:285
 			qw422016.E().S(username)
-//line views/stuff.qtpl:284
+//line views/stuff.qtpl:285
 			qw422016.N().S(`</a>`)
-//line views/stuff.qtpl:284
+//line views/stuff.qtpl:285
 		}
-//line views/stuff.qtpl:284
+//line views/stuff.qtpl:285
 		qw422016.N().S(`</li>
 `)
-//line views/stuff.qtpl:285
+//line views/stuff.qtpl:286
 	} else {
-//line views/stuff.qtpl:285
+//line views/stuff.qtpl:286
 		qw422016.N().S(`			<li>`)
-//line views/stuff.qtpl:286
+//line views/stuff.qtpl:287
 		qw422016.E().S(lc.Get("ui.about_noauth"))
-//line views/stuff.qtpl:286
+//line views/stuff.qtpl:287
 		qw422016.N().S(`</li>
 `)
-//line views/stuff.qtpl:287
+//line views/stuff.qtpl:288
 	}
-//line views/stuff.qtpl:287
+//line views/stuff.qtpl:288
 	qw422016.N().S(`		</ul>
 		<p>`)
-//line views/stuff.qtpl:289
+//line views/stuff.qtpl:290
 	qw422016.N().S(lc.Get("ui.about_hyphae", &l18n.Replacements{"link": "<a href=\"/list\">/list</a>"}))
-//line views/stuff.qtpl:289
+//line views/stuff.qtpl:290
 	qw422016.N().S(`</p>
 	</section>
 </main>
 </div>
 `)
-//line views/stuff.qtpl:293
+//line views/stuff.qtpl:294
 }
 
-//line views/stuff.qtpl:293
+//line views/stuff.qtpl:294
 func WriteAboutHTML(qq422016 qtio422016.Writer, lc *l18n.Localizer) {
-//line views/stuff.qtpl:293
+//line views/stuff.qtpl:294
 	qw422016 := qt422016.AcquireWriter(qq422016)
-//line views/stuff.qtpl:293
+//line views/stuff.qtpl:294
 	StreamAboutHTML(qw422016, lc)
-//line views/stuff.qtpl:293
+//line views/stuff.qtpl:294
 	qt422016.ReleaseWriter(qw422016)
-//line views/stuff.qtpl:293
+//line views/stuff.qtpl:294
 }
 
-//line views/stuff.qtpl:293
+//line views/stuff.qtpl:294
 func AboutHTML(lc *l18n.Localizer) string {
-//line views/stuff.qtpl:293
+//line views/stuff.qtpl:294
 	qb422016 := qt422016.AcquireByteBuffer()
-//line views/stuff.qtpl:293
+//line views/stuff.qtpl:294
 	WriteAboutHTML(qb422016, lc)
-//line views/stuff.qtpl:293
+//line views/stuff.qtpl:294
 	qs422016 := string(qb422016.B)
-//line views/stuff.qtpl:293
+//line views/stuff.qtpl:294
 	qt422016.ReleaseByteBuffer(qb422016)
-//line views/stuff.qtpl:293
+//line views/stuff.qtpl:294
 	return qs422016
-//line views/stuff.qtpl:293
+//line views/stuff.qtpl:294
 }
 
-//line views/stuff.qtpl:295
+//line views/stuff.qtpl:296
 func StreamCommonScripts(qw422016 *qt422016.Writer) {
-//line views/stuff.qtpl:295
+//line views/stuff.qtpl:296
 	qw422016.N().S(`
 `)
-//line views/stuff.qtpl:296
+//line views/stuff.qtpl:297
 	for _, scriptPath := range cfg.CommonScripts {
-//line views/stuff.qtpl:296
+//line views/stuff.qtpl:297
 		qw422016.N().S(`
 <script src="`)
-//line views/stuff.qtpl:297
+//line views/stuff.qtpl:298
 		qw422016.E().S(scriptPath)
-//line views/stuff.qtpl:297
+//line views/stuff.qtpl:298
 		qw422016.N().S(`"></script>
 `)
-//line views/stuff.qtpl:298
+//line views/stuff.qtpl:299
 	}
-//line views/stuff.qtpl:298
+//line views/stuff.qtpl:299
 	qw422016.N().S(`
 `)
-//line views/stuff.qtpl:299
+//line views/stuff.qtpl:300
 }
 
-//line views/stuff.qtpl:299
+//line views/stuff.qtpl:300
 func WriteCommonScripts(qq422016 qtio422016.Writer) {
-//line views/stuff.qtpl:299
+//line views/stuff.qtpl:300
 	qw422016 := qt422016.AcquireWriter(qq422016)
-//line views/stuff.qtpl:299
+//line views/stuff.qtpl:300
 	StreamCommonScripts(qw422016)
-//line views/stuff.qtpl:299
+//line views/stuff.qtpl:300
 	qt422016.ReleaseWriter(qw422016)
-//line views/stuff.qtpl:299
+//line views/stuff.qtpl:300
 }
 
-//line views/stuff.qtpl:299
+//line views/stuff.qtpl:300
 func CommonScripts() string {
-//line views/stuff.qtpl:299
+//line views/stuff.qtpl:300
 	qb422016 := qt422016.AcquireByteBuffer()
-//line views/stuff.qtpl:299
+//line views/stuff.qtpl:300
 	WriteCommonScripts(qb422016)
-//line views/stuff.qtpl:299
+//line views/stuff.qtpl:300
 	qs422016 := string(qb422016.B)
-//line views/stuff.qtpl:299
+//line views/stuff.qtpl:300
 	qt422016.ReleaseByteBuffer(qb422016)
-//line views/stuff.qtpl:299
+//line views/stuff.qtpl:300
 	return qs422016
-//line views/stuff.qtpl:299
+//line views/stuff.qtpl:300
 }

web/history.go

@@ -61,8 +61,14 @@ func handlerRecentChanges(w http.ResponseWriter, rq *http.Request) {
 }
 
 // genericHandlerOfFeeds is a helper function for the web feed handlers.
-func genericHandlerOfFeeds(w http.ResponseWriter, rq *http.Request, f func() (string, error), name string, contentType string) {
+func genericHandlerOfFeeds(w http.ResponseWriter, rq *http.Request, f func(history.FeedOptions) (string, error), name string, contentType string) {
-	if content, err := f(); err != nil {
+	opts, err := history.ParseFeedOptions(rq.URL.Query())
+	var content string
+	if err == nil {
+		content, err = f(opts)
+	}
+
+	if err != nil {
 		w.Header().Set("Content-Type", "text/plain;charset=utf-8")
 		w.WriteHeader(http.StatusInternalServerError)
 		fmt.Fprint(w, "An error while generating "+name+": "+err.Error())