Wordpress captions to Hugo shortcodes. This is a terrible hack, not performant. Only here for reference

caption-transform.go

package main

import (
	"fmt"
	"io/ioutil"
	"log"
	"net/url"
	"os"
	"path/filepath"
	"regexp"
	"strings"
)

func main() {
	if err := realMain(); err != nil {
		log.Fatalln(err)
	}

}

func realMain() error {
	dir, err := os.Getwd()
	if err != nil {
		return err
	}

	files, err := ioutil.ReadDir(dir)
	if err != nil {
		return err
	}

	re := regexp.MustCompile(`!\[.*\]\((.*?)\)(.*?)\[\/caption`)
	reURL := regexp.MustCompile(`!\[.*?\]\((.*?)\)`)

	for _, f := range files {
		if filepath.Ext(f.Name()) == ".go" {
			continue
		}

		if f.Name() == "images" {
			continue
		}

		out, err := ioutil.ReadFile(f.Name())
		if err != nil {
			return err
		}

		content := strings.Split(string(out), "\n")

		for i, line := range content {
			link := ""
			caption := ""

			splitted := re.FindStringSubmatch(line)
			if len(splitted) == 3 {
				caption = strings.TrimSpace(splitted[2])
			}

			links := reURL.FindStringSubmatch(line)
			if len(links) == 2 {
				link = links[1]
			}

			if link == "" {
				continue
			}

			u, err := url.Parse(link)
			if err != nil {
				return err
			}

			path := u.Path
			imageName := filepath.Base(path)
			imagePath := fmt.Sprintf(filepath.Join("/images/", imageName))

			finalLine := fmt.Sprintf(`{{< figure src="%s" >}}`, imagePath)
			if caption != "" {
				finalLine = fmt.Sprintf(`{{< figure src="%s" caption="%s" >}}`, imagePath, caption)
			}
			content[i] = finalLine
		}

		final := strings.Join(content, "\n")
		err = ioutil.WriteFile(f.Name(), []byte(final), 0644)
		if err != nil {
			return err
		}
	}

	return nil
}