156 lines
3.4 KiB
Go
156 lines
3.4 KiB
Go
package ui
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import (
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"log"
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"os"
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"time"
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"bytes"
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"context"
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"errors"
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"fmt"
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"io"
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"io/ioutil"
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"net/http"
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"path/filepath"
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"github.com/codeclysm/extract"
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"github.com/gotk3/gotk3/glib"
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"varia.zone/hui/internal/conf"
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"varia.zone/hui/internal/model"
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)
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// PostInitSpinner handles UI tasks after Hugo is downloaded.
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func PostInitSpinner(m *model.Model) error {
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if err := SwitchStackPage(m, conf.EmptyStackPage); err != nil {
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return err
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}
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if err := ShowSiteButtons(m); err != nil {
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return err
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}
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return nil
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}
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// Initialise initialises the program.
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func Initialise(m *model.Model) error {
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msg := "Downloading Hugo... this could take a minute..."
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if err := SwitchStackPage(m, conf.BusyStackPage, msg); err != nil {
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return err
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}
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go func() {
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if err := initialise(m.User.HomeDir); err != nil {
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glib.IdleAdd(func() bool {
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if err := ShowErrDialog(m, err); err != nil {
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log.Fatal(fmt.Errorf("main: unable to show error dialog: %s", err))
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}
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return false
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})
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}
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}()
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go func() {
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for {
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if _, err := os.Stat(conf.HugoBinPath(m.User.HomeDir)); err == nil {
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break
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}
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time.Sleep(1)
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}
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glib.IdleAdd(func() bool {
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if err := PostInitSpinner(m); err != nil {
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if err := ShowErrDialog(m, err); err != nil {
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log.Fatal(fmt.Errorf("main: unable to show error dialog: %s", err))
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}
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}
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return false
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})
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}()
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return nil
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}
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// initialise deals with initial setup functionality.
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func initialise(homeDir string) error {
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if err := createDirectories(homeDir); err != nil {
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return err
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}
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if err := downloadHugo(homeDir); err != nil {
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return err
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}
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return nil
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}
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// httpGetFile downloads a file from the internet.
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func httpGetFile(filepath, url string) error {
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out, err := os.Create(filepath)
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if err != nil {
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return fmt.Errorf("httpGetFile: unable to create '%s': %s", filepath, err)
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}
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defer out.Close()
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resp, err := http.Get(url)
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if err != nil {
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return fmt.Errorf("httpGetFile: unable to HTTP GET '%s'", url)
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}
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defer resp.Body.Close()
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if resp.StatusCode != http.StatusOK {
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return fmt.Errorf("httpGetFile: HTTP GET response code %v for '%s'", resp.StatusCode, url)
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}
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_, err = io.Copy(out, resp.Body)
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if err != nil {
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return fmt.Errorf("httpGetFile: unable to copy HTTP GET response to disk: %s", err)
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}
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return nil
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}
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// downloadHugo downloads Hugo.
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func downloadHugo(homeDir string) error {
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hugoTarPath := filepath.Join(conf.HugoDir(homeDir), fmt.Sprintf("hugo-%s.tar.gz", conf.HugoVersion))
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if _, err := os.Stat(conf.HugoBinPath(homeDir)); err == nil {
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return nil
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} else if errors.Is(err, os.ErrNotExist) {
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if err := httpGetFile(hugoTarPath, conf.HugoReleaseURL); err != nil {
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return err
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}
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}
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fpath, err := ioutil.ReadFile(hugoTarPath)
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if err != nil {
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return fmt.Errorf("downloadHugo: unable to read file '%s': %s", hugoTarPath, err)
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}
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if err := extract.Gz(context.TODO(), bytes.NewBuffer(fpath), conf.HugoDir(homeDir), nil); err != nil {
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return fmt.Errorf("downloadHugo: unable to extract file '%s': %s", hugoTarPath, err)
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}
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return nil
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}
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// createDirectories creates all necessary application directories.
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func createDirectories(homeDir string) error {
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paths := []string{
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conf.DataDir(homeDir),
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conf.HugoDir(homeDir),
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conf.SitesDir(homeDir),
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}
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for _, fpath := range paths {
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if _, err := os.Stat(fpath); err != nil && os.IsNotExist(err) {
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if err := os.Mkdir(fpath, 0764); err != nil {
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return fmt.Errorf("createDirectories: unable to create '%s': %s", fpath, err)
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}
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}
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}
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return nil
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}
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