Implement static directory support

config.go

@@ -27,6 +27,7 @@ type Task struct {
 	Output      string `toml:"output"`      // output file extension
 	Template    string `toml:"template"`    // template file extension
 	PostProcess string `toml:"postprocess"` // postprocess directive
+	Static      string `toml:"static"`      // static file directory
 	Destination string `toml:"destination"` // destination directory
 }
 
@@ -58,6 +59,7 @@ func DefaultConfig() *Config {
 		Input:       ".gmi",
 		Output:      ".gmi",
 		Template:    ".gmi",
+		Static:      "static",
 		Destination: "public",
 	}
 	return c

main.go

@@ -3,7 +3,12 @@ package main
 import (
 	"flag"
 	"fmt"
+	"io"
+	"io/fs"
 	"log"
+	"os"
+	"path/filepath"
+	"strings"
 )
 
 func main() {
@@ -71,5 +76,39 @@ func runTask(cfg *Config, task *Task) error {
 	if err := dir.write(task.Destination, task); err != nil {
 		return err
 	}
+	// Copy static files
+	if task.Static != "" {
+		err := copyAll(task.Static, task.Destination)
+		if err != nil {
+			return err
+		}
+	}
 	return nil
 }
+
+func copyAll(srcDir, dstDir string) error {
+	return filepath.Walk(srcDir, func(path string, info fs.FileInfo, err error) error {
+		if info.IsDir() {
+			// Do nothing
+			return nil
+		}
+
+		src, err := os.Open(path)
+		if err != nil {
+			return err
+		}
+		defer src.Close()
+
+		dstPath := filepath.Join(dstDir, strings.TrimPrefix(path, srcDir))
+		dst, err := os.Create(dstPath)
+		if err != nil {
+			return err
+		}
+		defer dst.Close()
+
+		if _, err := io.Copy(dst, src); err != nil {
+			return err
+		}
+		return nil
+	})
+}