PDF split and recombine script

main.go

package main

import (
	"fmt"
	"github.com/pdfcpu/pdfcpu/pkg/api"
	_ "github.com/pdfcpu/pdfcpu/pkg/api"
	"log"
	"os"
	"path/filepath"
	"strings"
)

func main() {

	inputTitle := "gofaster-master.pdf"
	choppedTitle := "./tmp/chop.pdf"
	blankPage := "page2.pdf"

	// remove the cover sheet and second page from the master
	err := api.TrimFile(inputTitle, choppedTitle, []string{"3-216"}, nil)
	if err != nil {
		log.Fatalln("err")
	}

	// get all nft pdf covers
	files, err := os.ReadDir("./nft")
	if err != nil {
		log.Fatalln(err)
	}

	nfts := []string{}

	for _, file := range files {
		ext := filepath.Ext(file.Name())
		if ext == ".pdf" {
			nfts = append(nfts, fmt.Sprintf("%s/%s", "./nft", file.Name()))
		}
	}

	fmt.Println(nfts)

	for _, n := range nfts {
		number := strings.TrimLeft(n, "./nft/goatspeed-")
		number = strings.TrimRight(number, ".pdf")
		err := api.MergeCreateFile([]string{n, blankPage, choppedTitle}, fmt.Sprintf("./out/gofaster-nft-edition-%s.pdf", number), nil)
		if err != nil {
			log.Fatalln(err)
		}
	}
}