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// +build ignore
package main
import (
"archive/zip"
"bufio"
"bytes"
"fmt"
"io"
"io/ioutil"
"log"
"net/http"
"os"
"path"
"path/filepath"
"strings"
"github.com/PuerkitoBio/goquery"
)
func main() {
site := "https://www.sqlite.org/download.html"
fmt.Printf("scraping %v\n", site)
doc, err := goquery.NewDocument(site)
if err != nil {
log.Fatal(err)
}
var url string
doc.Find("a").Each(func(_ int, s *goquery.Selection) {
if url == "" && strings.HasPrefix(s.Text(), "sqlite-amalgamation-") {
url = "https://www.sqlite.org/2017/" + s.Text()
}
})
if url == "" {
return
}
fmt.Printf("downloading %v\n", url)
resp, err := http.Get(url)
if err != nil {
log.Fatal(err)
}
b, err := ioutil.ReadAll(resp.Body)
if err != nil {
resp.Body.Close()
log.Fatal(err)
}
fmt.Printf("extracting %v\n", path.Base(url))
r, err := zip.NewReader(bytes.NewReader(b), resp.ContentLength)
if err != nil {
resp.Body.Close()
log.Fatal(err)
}
resp.Body.Close()
for _, zf := range r.File {
var f *os.File
switch path.Base(zf.Name) {
case "sqlite3.c":
f, err = os.Create("sqlite3-binding.c")
case "sqlite3.h":
f, err = os.Create("sqlite3-binding.h")
case "sqlite3ext.h":
f, err = os.Create("sqlite3ext.h")
default:
continue
}
if err != nil {
log.Fatal(err)
}
zr, err := zf.Open()
if err != nil {
log.Fatal(err)
}
_, err = io.WriteString(f, "#ifndef USE_LIBSQLITE3\n")
if err != nil {
zr.Close()
f.Close()
log.Fatal(err)
}
scanner := bufio.NewScanner(zr)
for scanner.Scan() {
text := scanner.Text()
if text == `#include "sqlite3.h"` {
text = `#include "sqlite3-binding.h"`
}
_, err = fmt.Fprintln(f, text)
if err != nil {
break
}
}
err = scanner.Err()
if err != nil {
zr.Close()
f.Close()
log.Fatal(err)
}
_, err = io.WriteString(f, "#else // USE_LIBSQLITE3\n // If users really want to link against the system sqlite3 we\n// need to make this file a noop.\n #endif")
if err != nil {
zr.Close()
f.Close()
log.Fatal(err)
}
zr.Close()
f.Close()
fmt.Printf("extracted %v\n", filepath.Base(f.Name()))
}
}
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