bulk generate PDF files for testing

pdf-spammer.go

package main

import (
	"fmt"
	"os"
	"sync"

	"github.com/go-pdf/fpdf"
)

func main() {
	os.Mkdir("output", os.FileMode(0755))

	var wg sync.WaitGroup

	for i := 0; i < 300; i++ {
		wg.Add(1)
		go func(index int) {
			defer wg.Done()
			pdf := fpdf.New("P", "mm", "A4", "")
			pdf.AddPage()
			pdf.SetFont("Arial", "B", 16)

			content := fmt.Sprintf("Document #%d", index+1)
			pdf.Cell(40, 10, content)
			err := pdf.OutputFileAndClose(fmt.Sprintf("./output/document-%d.pdf", index+1))
			if err != nil {
				fmt.Printf("failed to generate PDF %d\n", index)
				os.Exit(1)
			}
			fmt.Printf("created document %d\n", index)
		}(i)
	}
	wg.Wait()
	fmt.Println("created all the PDFs")
}