stephenmathieson · November 13, 2015 23:29 · Nov 13, 2015
diff --git a/scaffold.go b/scaffold.go
@@ -0,0 +1,67 @@
+package main
+
+import (
+	"fmt"
+	"io/ioutil"
+	"net/http"
+	"os"
+	"regexp"
+)
+
+var fileTemplate = `
+package main
+
+import "fmt"
+
+func main() {
+}
+`
+var directoryFormat = "./examples/%02d-%s"
+var fileFormat = "%s/main.go"
+var expr = regexp.MustCompile(`<li><a href="([\w-]+)">`)
+
+func main() {
+	html, err := request("https://gobyexample.com/")
+	check(err)
+
+	matches := expr.FindAllStringSubmatch(html, -1)
+	for i, name := range matches {
+		dirname := fmt.Sprintf(directoryFormat, i+1, name[1])
+		filename := fmt.Sprintf(fileFormat, dirname)
+
+		err := os.MkdirAll(dirname, 0777)
+		check(err)
+
+		fp, err := os.Create(filename)
+		check(err)
+
+		_, err = fp.WriteString(fileTemplate)
+		check(err)
+
+		defer fp.Close()
+	}
+}
+
+func check(e error) {
+	if e != nil {
+		panic(e)
+	}
+}
+
+func request(url string) (string, error) {
+	res, err := http.Get(url)
+	if err != nil {
+		return "", err
+	}
+
+	defer res.Body.Close()
+
+	body, err := ioutil.ReadAll(res.Body)
+	if err != nil {
+		return "", err
+	}
+
+	html := string(body)
+
+	return html, nil
+}