dir: Combine handling of feeds and deprecated feeds

dir.go

@@ -22,8 +22,7 @@ type Dir struct {
 	Pages     []*Page
 	Dirs      []*Dir
 	index     *Page             // The index page.
-	feed       []byte            // Atom feed (deprecated)
-	extraFiles map[string][]byte // Atom/RSS feeds
+	feeds     map[string][]byte // Atom/RSS/Custom feeds.
 	path      string            // relative to the content dir
 }
 
@@ -159,7 +158,7 @@ func (d *Dir) process(cfg *Site, task *Task) error {
 		if err != nil {
 			return err
 		}
-		d.addExtraFile(feed.Output, b)
+		d.addFeed(feed.Output, b)
 	}
 
 	if task.TemplateExt != "" {
@@ -188,34 +187,6 @@ func (d *Dir) process(cfg *Site, task *Task) error {
 		}
 	}
 
-	// Feed represents a feed.
-	type Feed struct {
-		Title     string    // Feed title.
-		Permalink string    // Feed permalink.
-		Updated   time.Time // Last updated time.
-		Entries   []*Page   // Feed entries.
-	}
-
-	// Create feeds
-	if title, ok := cfg.Feeds[d.Permalink]; ok {
-		var b bytes.Buffer
-		feed := &Feed{
-			Title:     title,
-			Permalink: d.Permalink,
-			Updated:   time.Now(),
-			Entries:   d.Pages,
-		}
-		tmpl, ok := cfg.templates.FindTemplate(d.Permalink, "atom.xml")
-		if ok {
-			if err := tmpl.Execute(&b, feed); err != nil {
-				return err
-			}
-			d.feed = b.Bytes()
-		} else {
-			fmt.Printf("Warning: failed to generate feed %q: missing template \"atom.xml\"\n", title)
-		}
-	}
-
 	// Process subdirectories
 	for _, d := range d.Dirs {
 		if err := d.process(cfg, task); err != nil {
@@ -227,35 +198,55 @@ func (d *Dir) process(cfg *Site, task *Task) error {
 
 // buildFeed build the feed of the directory
 func (d Dir) buildFeed(cfg *Site, feed Feed) ([]byte, error) {
+	// Feed represents a feed.
+	type Feed struct {
+		Title     string
+		Permalink string
+		Updated   time.Time
+		Pages     []*Page
+	}
+
+	// DeprecatedFeed represents a deprecated feed.
+	type DeprecatedFeed struct {
+		Title     string
+		Permalink string
+		Updated   time.Time
+		Entries   []*Page
+	}
+
 	tmpl, ok := cfg.templates.FindTemplate(d.Permalink, feed.Template)
 	if !ok {
-		return nil, fmt.Errorf("missing feed template %q to generate %q", feed.Template, feed.Title)
+		return nil, fmt.Errorf("failed to generate feed %q: missing feed template %q", feed.Title, feed.Template)
 	}
 
 	var b bytes.Buffer
-	data := struct {
-		Title     string    // Feed title.
-		Permalink string    // Feed permalink.
-		Updated   time.Time // Last updated time.
-		Pages     []*Page   // Feed pages.
-	}{
+	var data interface{}
+	if !feed.deprecated {
+		data = Feed{
 			Title:     feed.Title,
 			Permalink: d.Permalink,
 			Updated:   time.Now(),
 			Pages:     d.Pages,
 		}
+	} else {
+		data = DeprecatedFeed{
+			Title:     feed.Title,
+			Permalink: d.Permalink,
+			Updated:   time.Now(),
+			Entries:   d.Pages,
+		}
+	}
 	if err := tmpl.Execute(&b, data); err != nil {
 		return nil, err
 	}
 	return b.Bytes(), nil
 }
 
-func (d *Dir) addExtraFile(name string, content []byte) {
-	if d.extraFiles == nil {
-		d.extraFiles = map[string][]byte{name: content}
-	} else {
-		d.extraFiles[name] = content
+func (d *Dir) addFeed(name string, content []byte) {
+	if d.feeds == nil {
+		d.feeds = map[string][]byte{}
 	}
+	d.feeds[name] = content
 }
 
 // write writes the directory's contents to the provided destination path.
@@ -289,18 +280,8 @@ func (d *Dir) write(dstDir string, task *Task) error {
 		}
 	}
 
-	// Write the atom feed
-	if d.feed != nil {
-		const path = "atom.xml"
-		dstPath := pathpkg.Join(dirPath, path)
-		os.MkdirAll(dirPath, 0755)
-		if err := os.WriteFile(dstPath, d.feed, 0644); err != nil {
-			return err
-		}
-	}
-
 	// Write feeds
-	for name, content := range d.extraFiles {
+	for name, content := range d.feeds {
 		dstPath := pathpkg.Join(dstDir, name)
 		os.MkdirAll(dirPath, 0755)
 		if err := os.WriteFile(dstPath, content, 0644); err != nil {

main.go

@@ -51,11 +51,11 @@ func build() {
 
 	site, err := LoadSite(config)
 	if err != nil {
-		log.Fatal(err)
+		log.Fatalf("ERROR: %v", err)
 	}
 
 	if err := site.run(); err != nil {
-		log.Fatal(err)
+		log.Fatalf("ERROR: %v", err)
 	}
 }
 

site.go

@@ -16,7 +16,7 @@ type Site struct {
 	Title      string            `toml:"title"`
 	URLs       []string          `toml:"urls"`
 	Tasks      []*Task           `toml:"tasks"`
-	Feeds      map[string]string `toml:"feeds"`
+	Feeds      map[string]string `toml:"feeds"` // Deprecated. Use Task.Feeds instead
 	Params     map[string]string `toml:"params"`
 	Permalinks map[string]string `toml:"permalinks"`
 	permalinks map[string]*template.Template
@@ -43,6 +43,9 @@ type Feed struct {
 	Title    string `toml:"title"`
 	Template string `toml:"template"`
 	Output   string `toml:"output"`
+
+	// if true, the feed was specified using deprecated configuration options.
+	deprecated bool
 }
 
 func (t *Task) Match(ext string) bool {
@@ -96,7 +99,25 @@ func LoadSite(config string) (*Site, error) {
 	for _, task := range site.Tasks {
 		task.feeds = map[string][]Feed{}
 		for _, feed := range task.Feeds {
-			task.feeds[feed.InputDir] = append(task.feeds[feed.InputDir], feed)
+			dir := feed.InputDir
+			task.feeds[dir] = append(task.feeds[dir], feed)
+		}
+	}
+
+	// Populate task feeds map with deprecated feeds
+	for dir, title := range site.Feeds {
+		// Deprecated feeds apply to every task
+		for _, task := range site.Tasks {
+			if _, ok := task.feeds[dir]; !ok {
+				dir = strings.TrimSuffix(dir, "/")
+				task.feeds[dir] = append(task.feeds[dir], Feed{
+					InputDir:   dir,
+					Title:      title,
+					Template:   "atom.xml",
+					Output:     path.Join(dir, "atom.xml"),
+					deprecated: true,
+				})
+			}
 		}
 	}