Add an exclude config to avoid crashes when Go template system uses recursive functions on templates with {{embed}} in them.

config/loader.go

@@ -13,6 +13,7 @@ type config struct {
   WatchDelay string `json:"watch_delay"`
   SyncDir string `json:"sync_dir"`
   MetaFiles []string `json:"meta_files"`
+  Exclude []string `json:"exclude"`
 }
 
 var Settings config

example/.ssgod.json

@@ -4,6 +4,7 @@
   "target": "public",
   "watch_delay": "500ms",
   "sync_dir": "static",
+  "exclude": [],
   "meta_files": [
     "pages/sitemap.html"
   ]

main.go

@@ -13,6 +13,8 @@ import (
 	"strings"
 	"text/template"
 	"time"
+	"regexp"
+	"slices"
 
 	"github.com/fsnotify/fsnotify"
 	"github.com/yuin/goldmark"
@@ -187,6 +189,17 @@ func SamePath(a string, b string) bool {
 	return filepath.ToSlash(a) == filepath.ToSlash(b)
 }
 
+func ExcludedPath(fp string) bool {
+	is_layout := fp == config.Settings.Layout
+	is_excluded := slices.ContainsFunc(config.Settings.Exclude, func (s string) bool {
+		matches, err := regexp.MatchString(s, fp)
+		if err != nil { log.Panic("invalid excludes regex", s, "error: ", err) }
+		return matches
+	})
+
+	return is_layout || is_excluded
+}
+
 func ProcessDirEntry(path string, d fs.DirEntry, meta *PageMetaData) error {
 	settings := config.Settings
 	var err error = nil
@@ -194,7 +207,7 @@ func ProcessDirEntry(path string, d fs.DirEntry, meta *PageMetaData) error {
 	if !d.IsDir() && !SamePath(path, config.Settings.Layout) {
 		source_name, ext, found := SplitPathExt(path)
 
-		if found && path != settings.Layout {
+		if found && !ExcludedPath(path) {
 			target_path := RePrefixPath(path, settings.Target)
 
 			err = MkdirPath(target_path)