filebrowser/insthugo/insthugo.go

289 lines
6.6 KiB
Go

package insthugo
import (
"archive/zip"
"compress/gzip"
"crypto/sha256"
"encoding/hex"
"fmt"
"io"
"log"
"net/http"
"os"
"os/exec"
"os/user"
"path/filepath"
"runtime"
)
const (
version = "0.15"
baseurl = "https://github.com/spf13/hugo/releases/download/v" + version + "/"
)
var (
caddy, bin, temp, hugo, tempfile, zipname, exename string
sha256Hash = map[string]string{
"hugo_0.15_darwin_386.zip": "f9b7353f9b64e7aece5f7981e5aa97dc4b31974ce76251edc070e77691bc03e2",
"hugo_0.15_darwin_amd64.zip": "aeecd6a12d86ab920f5b04e9486474bbe478dc246cdc2242799849b84c61c6f1",
"hugo_0.15_dragonfly_amd64.zip": "e380343789f2b2e0c366c8e1eeb251ccd90eea53dac191ff85d8177b130e53bc",
"hugo_0.15_freebsd_386.zip": "98f9210bfa3dcb48bd154879ea1cfe1b0ed8a3d891fdeacbdb4c3fc69b72aac4",
"hugo_0.15_freebsd_amd64.zip": "aa6a3028899e76e6920b9b5a64c29e14017ae34120efa67276e614e3a69cb100",
"hugo_0.15_freebsd_arm.zip": "de52e1b07caf778bdc3bdb07f39119cd5a1739c8822ebe311cd4f667c43588ac",
"hugo_0.15_linux_386.tar.gz": "af28c4cbb16db765535113f361a38b2249c634ce2d3798dcf5b795de6e4b7ecf",
"hugo_0.15_linux_amd64.tar.gz": "32a6335bd76f72867efdec9306a8a7eb7b9498a2e0478105efa96c1febadb09b",
"hugo_0.15_linux_arm.tar.gz": "886dd1a843c057a46c541011183dd558469250580e81450eedbd1a4d041e9234",
"hugo_0.15_netbsd_386.zip": "6245f5db16b33a09466f149d5b7b68a7899d6d624903de9e7e70c4b6ea869a72",
"hugo_0.15_netbsd_amd64.zip": "103ea8d81d2a3d707c05e3dd68c98fcf8146ddd36b49bf0e65d9874cee230c88",
"hugo_0.15_netbsd_arm.zip": "9c9b5cf4ea3b6169be1b5fc924251a247d9c140dd8a45aa5175031878585ff0a",
"hugo_0.15_openbsd_386.zip": "81dfdb3048a27a61b249650241fe4e8da1eda31a3a7311c615eb419f1cdd06b1",
"hugo_0.15_openbsd_amd64.zip": "e7447cde0dd7628b05b25b86938018774d8db8156ab1330b364e0e2c6501ad87",
"hugo_0.15_windows_386_32-bit-only.zip": "0a72f9a1a929f36c0e52fb1c6272b4d37a2bd1a6bd19ce57a6e7b6803b434756",
"hugo_0.15_windows_amd64.zip": "9f03602e48ae2199e06431d7436fb3b9464538c0d44aac9a76eb98e1d4d5d727",
}
)
// GetPath retrives the Hugo path for the user or install it if it's not found
func GetPath() string {
initializeVariables()
// Check if Hugo is already on $PATH
if hugo, err := exec.LookPath("hugo"); err == nil {
return hugo
}
// Check if Hugo is on $HOME/.caddy/bin
if _, err := os.Stat(hugo); err == nil {
return hugo
}
fmt.Println("Unable to find Hugo on your computer.")
// Create the neccessary folders
os.MkdirAll(caddy, 0774)
os.Mkdir(bin, 0774)
os.Mkdir(temp, 0774)
downloadHugo()
checkSHA256()
fmt.Print("Unziping... ")
var err error
// Unzip or Ungzip the file
switch runtime.GOOS {
case "darwin", "windows":
err = unzip(tempfile, temp)
default:
err = ungzip(tempfile, temp)
}
if err != nil {
fmt.Println(err)
os.Exit(-1)
}
fmt.Println("done.")
var exetorename string
err = filepath.Walk(temp, func(path string, f os.FileInfo, err error) error {
if f.Name() == exename {
exetorename = path
}
return nil
})
err = os.Rename(exetorename, hugo)
if err != nil {
fmt.Println(err)
os.Exit(-1)
}
fmt.Println("Hugo installed at " + hugo)
clean()
return hugo
}
func initializeVariables() {
exename = "hugo_" + version + "_" + runtime.GOOS + "_" + runtime.GOARCH
zipname = exename
usr, err := user.Current()
if err != nil {
fmt.Println(err)
os.Exit(-1)
}
caddy = filepath.Join(usr.HomeDir, ".caddy")
bin = filepath.Join(caddy, "bin")
temp = filepath.Join(caddy, "temp")
hugo = filepath.Join(bin, "hugo")
switch runtime.GOOS {
case "darwin":
zipname += ".zip"
case "windows":
// At least for v0.15 version
if runtime.GOARCH == "386" {
zipname += "32-bit-only"
}
zipname += ".zip"
exename += ".exe"
hugo += ".exe"
default:
zipname += ".tar.gz"
}
}
func downloadHugo() {
tempfile = filepath.Join(temp, zipname)
fmt.Print("Downloading Hugo from GitHub releases... ")
// Create the file
out, err := os.Create(tempfile)
out.Chmod(0774)
if err != nil {
clean()
fmt.Println(err)
os.Exit(-1)
}
defer out.Close()
// Get the data
resp, err := http.Get(baseurl + zipname)
if err != nil {
fmt.Println("An error ocurred while downloading. If this error persists, try downloading Hugo from \"https://github.com/spf13/hugo/releases/\" and put the executable in " + bin + " and rename it to 'hugo' or 'hugo.exe' if you're on Windows.")
fmt.Println(err)
os.Exit(-1)
}
defer resp.Body.Close()
// Writer the body to file
_, err = io.Copy(out, resp.Body)
if err != nil {
fmt.Println(err)
os.Exit(-1)
}
fmt.Println("downloaded.")
}
func checkSHA256() {
fmt.Print("Checking SHA256...")
hasher := sha256.New()
f, err := os.Open(tempfile)
if err != nil {
log.Fatal(err)
}
defer f.Close()
if _, err := io.Copy(hasher, f); err != nil {
log.Fatal(err)
}
if hex.EncodeToString(hasher.Sum(nil)) != sha256Hash[zipname] {
fmt.Println("can't verify SHA256.")
os.Exit(-1)
}
fmt.Println("checked!")
}
func unzip(src, dest string) error {
r, err := zip.OpenReader(src)
if err != nil {
return err
}
defer func() {
if err := r.Close(); err != nil {
panic(err)
}
}()
os.MkdirAll(dest, 0755)
// Closure to address file descriptors issue with all the deferred .Close() methods
extractAndWriteFile := func(f *zip.File) error {
rc, err := f.Open()
if err != nil {
return err
}
defer func() {
if err := rc.Close(); err != nil {
panic(err)
}
}()
path := filepath.Join(dest, f.Name)
if f.FileInfo().IsDir() {
os.MkdirAll(path, f.Mode())
} else {
if _, err := os.Stat(filepath.Dir(path)); os.IsNotExist(err) {
os.MkdirAll(filepath.Dir(path), 0755)
}
f, err := os.OpenFile(path, os.O_WRONLY|os.O_CREATE|os.O_TRUNC, f.Mode())
if err != nil {
return err
}
defer func() {
if err := f.Close(); err != nil {
panic(err)
}
}()
_, err = io.Copy(f, rc)
if err != nil {
return err
}
}
return nil
}
for _, f := range r.File {
err := extractAndWriteFile(f)
if err != nil {
return err
}
}
return nil
}
func ungzip(source, target string) error {
reader, err := os.Open(source)
if err != nil {
return err
}
defer reader.Close()
archive, err := gzip.NewReader(reader)
if err != nil {
return err
}
defer archive.Close()
target = filepath.Join(target, archive.Name)
writer, err := os.Create(target)
if err != nil {
return err
}
defer writer.Close()
_, err = io.Copy(writer, archive)
return err
}
func clean() {
fmt.Print("Removing temporary files... ")
os.RemoveAll(temp)
fmt.Println("done.")
}