portal/api/s5/generate.go

140 lines
4.1 KiB
Go

// This program downloads the dist assets for the current swagger-ui version and places them into the embed directory
// TODO: Compress?
//go:build ignore
// +build ignore
package main
import (
"archive/tar"
"bytes"
"compress/gzip"
"encoding/json"
"errors"
"fmt"
"io"
"io/fs"
"io/ioutil"
"log"
"net/http"
"os"
"path/filepath"
"regexp"
"strings"
)
type releaseResp []struct {
// TagName is a release tag name
TagName string `json:"tag_name"`
}
func main() {
log.SetFlags(0)
releases := releaseResp{}
// get the releases so we can download the latest one
req, _ := http.NewRequest("GET", "https://api.github.com/repos/swagger-api/swagger-ui/releases", nil)
req.Header.Set("Accept", "application/vnd.github.v3+json")
resp, err := http.DefaultClient.Do(req)
if err != nil {
log.Fatalf("error getting release list: %v", err)
}
if resp.StatusCode != http.StatusOK {
log.Fatalf("got status [%s] on release list download", resp.Status)
}
if err := json.NewDecoder(resp.Body).Decode(&releases); err != nil {
log.Fatalf("error decoding response: %v", err)
}
resp.Body.Close()
if len(releases) == 0 {
log.Fatal("somehow got no releases, nothing to do")
}
tag := releases[0].TagName
current, err := ioutil.ReadFile("current_version.txt")
if err != nil {
switch {
case errors.Is(err, fs.ErrNotExist):
// no problem, just do it
default:
log.Fatalf("unable to check version in current_version.txt: %v", err)
}
}
cv := string(bytes.TrimRight(current, "\n"))
if cv == tag {
log.Print("version is current, nothing to do")
os.Exit(0)
}
log.Printf("downloading release %s...", tag)
resp, err = http.Get(fmt.Sprintf("https://github.com/swagger-api/swagger-ui/archive/%s.tar.gz", tag))
if err != nil {
log.Fatalf("error downloading release archive: %v", err)
}
defer resp.Body.Close()
if resp.StatusCode != http.StatusOK {
log.Fatalf("got status [%s] on release archive download", resp.Status)
}
zr, err := gzip.NewReader(resp.Body)
if err != nil {
log.Fatalf("error opening file as gzip: %v", err)
}
if err := os.RemoveAll("embed"); err != nil {
log.Fatalf("error removing old embed directory")
}
if err := os.Mkdir("embed", 0o700); err != nil {
log.Fatalf("error recreating embed directory")
}
tr := tar.NewReader(zr)
for {
header, err := tr.Next()
if err == io.EOF {
break
}
if err != nil {
log.Fatalf("tar parsing error: %v", err)
}
if header.Typeflag == tar.TypeReg {
// got a file, remove version directory
fname := header.Name[strings.Index(header.Name, `/`):]
if strings.HasPrefix(fname, `/dist`) {
fname = strings.TrimPrefix(fname, `/dist`)
out, err := os.Create(filepath.Join("embed", fname))
if err != nil {
log.Fatalf("error create output file: %v", err)
}
if _, err := io.Copy(out, tr); err != nil {
log.Fatalf("error writing output file: %v", err)
}
}
}
}
// replace the hard-coded JSON file with a generic file and disable the topbar
initFile, err := os.ReadFile(filepath.Join("embed", "swagger-initializer.js"))
if err != nil {
log.Fatalf("error opening swagger-initializer.js for templating :%v", err)
}
newInit := regexp.MustCompile(`url:\s+"[^"]*"`).ReplaceAllLiteral(initFile, []byte(`url: "./swagger_spec"`))
newInit = regexp.MustCompile(`,?\s+SwaggerUIStandalonePreset.*\n`).ReplaceAllLiteral(newInit, []byte("\n"))
newInit = regexp.MustCompile(`(?s),\s+plugins: \[.*],\n`).ReplaceAllLiteral(newInit, []byte("\n"))
newInit = regexp.MustCompile(`\n\s*layout:.*\n`).ReplaceAllLiteral(newInit, []byte("\n"))
//fmt.Println(string(newInit))
newinitFile, err := os.Create(filepath.Join("embed", "swagger-initializer.js"))
if err != nil {
log.Fatalf("error re-creating swagger-initializer.js file: %v", err)
}
defer newinitFile.Close()
if _, err := newinitFile.Write(newInit); err != nil {
log.Fatalf("unable to write to swagger-initializer.js: %v", err)
}
newcv, err := os.Create("current_version.txt")
if err != nil {
log.Fatalf("can't update current_version.txt: %v", err)
}
defer newcv.Close()
newcv.WriteString(tag)
log.Printf("updated swaggerui from %s => %s, please check templated swagger-initializer.js and retag repo", cv, tag)
}