progress

internal/bins/bins.go

@@ -0,0 +1,127 @@
+package bins
+
+import (
+	"compress/bzip2"
+	"encoding/json"
+	"errors"
+	"fmt"
+	"io"
+	"io/ioutil"
+	"net/http"
+	"os"
+	"path"
+	"runtime"
+	"strings"
+
+	"github.com/blang/semver/v4"
+	"github.com/cupcakearmy/autorestic/internal"
+)
+
+const INSTALL_PATH = "/usr/local/bin"
+
+type GithubReleaseAsset struct {
+	Name string `json:"name"`
+	Link string `json:"browser_download_url"`
+}
+type GithubRelease struct {
+	Tag    string               `json:"tag_name"`
+	Assets []GithubReleaseAsset `json:"assets"`
+}
+
+func dlJSON(url string) (GithubRelease, error) {
+	var parsed GithubRelease
+	resp, err := http.Get(url)
+	if err != nil {
+		return parsed, err
+	}
+	defer resp.Body.Close()
+	body, err := ioutil.ReadAll(resp.Body)
+	if err != nil {
+		return parsed, err
+
+	}
+	json.Unmarshal(body, &parsed)
+	return parsed, nil
+}
+
+func InstallRestic() error {
+	installed := internal.CheckIfCommandIsCallable("restic")
+	if installed {
+		fmt.Println("restic already installed")
+		return nil
+	} else {
+		body, err := dlJSON("https://api.github.com/repos/restic/restic/releases/latest")
+		if err != nil {
+			return err
+		}
+		ending := fmt.Sprintf("_%s_%s.bz2", runtime.GOOS, runtime.GOARCH)
+		for _, asset := range body.Assets {
+			if strings.HasSuffix(asset.Name, ending) {
+				// Found
+				fmt.Println(asset.Link)
+
+				// Download archive
+				resp, err := http.Get(asset.Link)
+				if err != nil {
+					return err
+				}
+				defer resp.Body.Close()
+
+				// Uncompress
+				bz := bzip2.NewReader(resp.Body)
+
+				// Save binary
+				file, err := os.Create(path.Join(INSTALL_PATH, "restic"))
+				if err != nil {
+					return err
+				}
+				file.Chmod(0755)
+				defer file.Close()
+				io.Copy(file, bz)
+
+				fmt.Printf("Successfully installed restic under %s\n", INSTALL_PATH)
+				return nil
+			}
+		}
+		return errors.New("could not find right binary for your system, please install restic manually. https://bit.ly/2Y1Rzai")
+	}
+}
+
+func upgradeRestic() error {
+	out, err := internal.ExecuteCommand(internal.ExecuteOptions{
+		Command: "restic",
+	}, "self-update")
+	fmt.Println(out)
+	return err
+}
+
+func Upgrade(restic bool) error {
+	// Upgrade restic
+	if restic {
+		InstallRestic()
+		upgradeRestic()
+	}
+
+	// Upgrade self
+	current, err := semver.ParseTolerant(internal.VERSION)
+	if err != nil {
+		return err
+	}
+	fmt.Println(current)
+
+	body, err := dlJSON("https://api.github.com/repos/cupcakearmy/autorestic/releases/latest")
+	if err != nil {
+		return err
+	}
+	latest, err := semver.ParseTolerant(body.Tag)
+	if err != nil {
+		return err
+	}
+	if current.GT(latest) {
+
+		fmt.Println("Updated autorestic")
+	} else {
+		fmt.Println("Already up to date")
+	}
+	return nil
+}