Make a PDF using golang

Have you ever needed to make a PDF programatically? There's a library for this:

https://github.com/jung-kurt/gofpdf

package main

import (
  "fmt"

  "github.com/jung-kurt/gofpdf"
)

func main() {
  fmt.Println("Running...")
  pdf := gofpdf.New("L", "mm", "A4", "")
  pdf.AddPage()
  pdf.Image("photo1.jpg", 9, 9, 200, 133, false, "", 0, "")
  err := pdf.OutputFileAndClose("example.pdf")
  if err == nil {
    fmt.Println("Done!")
  } else {
    fmt.Println("Error", err)
  }
} 

Here we added just 1 photo. But what if we have a directory with many images? Lets add them all.

package main

import (
  "fmt"
  "io/ioutil"

  "github.com/jung-kurt/gofpdf"
)

func main() {
  fmt.Println("Running...")
  pdf := gofpdf.New("L", "mm", "A4", "")

  files, _ := ioutil.ReadDir("images")
  for _, file := range files {
    pdf.AddPage()
    pdf.Image(fmt.Sprintf("images/%s", file.Name()), 9, 9, 200, 133, false, "", 0, "")
  }
  err := pdf.OutputFileAndClose("example.pdf")
  if err == nil {
    fmt.Println("Done!")
  } else {
    fmt.Println("Error", err)
  }
}

Now we have a new page for each image in the directory!