1 files changed, 99 insertions, 0 deletions
diff --git a/tool/upgrade.go b/tool/upgrade.go
new file mode 100644
index 0000000..f93f35c
--- /dev/null
+++ b/tool/upgrade.go
@@ -0,0 +1,99 @@
+// +build ignore
+
+package main
+
+import (
+	"archive/zip"
+	"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)
+		}
+		_, err = io.Copy(f, zr)
+		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()))
+	}
+}