update: add initial update command powered by equinox

cmd/root.go

@@ -21,6 +21,7 @@ import (
 	"github.com/spf13/cobra"
 	"go.transparencylog.net/tl/cmd/cat"
 	"go.transparencylog.net/tl/cmd/get"
+	"go.transparencylog.net/tl/cmd/update"
 	"go.transparencylog.net/tl/cmd/verify"
 	"go.transparencylog.net/tl/cmd/version"
 )
@@ -41,6 +42,7 @@ func init() {
 	rootCmd.AddCommand(verify.VerifyCmd)
 	rootCmd.AddCommand(cat.CatCmd)
 	rootCmd.AddCommand(version.Cmd)
+	rootCmd.AddCommand(update.Cmd)
 }
 
 func Execute() {

cmd/update/update.go

@@ -0,0 +1,57 @@
+package update
+
+import (
+	"fmt"
+	"log"
+
+	"github.com/equinox-io/equinox"
+	"github.com/spf13/cobra"
+)
+
+var Cmd = &cobra.Command{
+	Use:   "update",
+	Short: "Update to the latest release",
+
+	Args: cobra.ExactArgs(0),
+
+	Run: update,
+}
+
+// assigned when creating a new application in the dashboard
+const appID = "app_gCwJN1DfmYU"
+
+// public portion of signing key generated by `equinox genkey`
+var publicKey = []byte(`
+-----BEGIN ECDSA PUBLIC KEY-----
+MHYwEAYHKoZIzj0CAQYFK4EEACIDYgAEHk9AJl154cKxZRECl5oO7GaAAM4Rc5e4
+rBytsXGhOWeZdv/QGXWO3gPq134sTFeOwNwu6GJdk1QhAw85YQc/RKFf2vm2Jut4
+Ad3Me5ph2iwXmgG3tPvBNthqeQgIu58f
+-----END ECDSA PUBLIC KEY-----
+`)
+
+func update(cmd *cobra.Command, args []string) {
+	var opts equinox.Options
+	if err := opts.SetPublicKeyPEM(publicKey); err != nil {
+		log.Fatalf("%v", err)
+	}
+
+	// check for the update
+	resp, err := equinox.Check(appID, opts)
+	switch {
+	case err == equinox.NotAvailableErr:
+		fmt.Println("No update available, already at the latest version!")
+		log.Fatalf("%v", err)
+	case err != nil:
+		fmt.Println("Update failed:", err)
+		log.Fatalf("%v", err)
+	}
+
+	// fetch the update and apply it
+	err = resp.Apply()
+	if err != nil {
+		log.Fatalf("%v", err)
+	}
+
+	fmt.Printf("Updated to new version: %s!\n", resp.ReleaseVersion)
+	return
+}

go.mod

@@ -5,6 +5,7 @@ go 1.14
 require (
 	github.com/cavaliercoder/grab v1.0.1-0.20200703095818-d3334b8f122d
 	github.com/dgraph-io/badger/v2 v2.0.3
+	github.com/equinox-io/equinox v1.2.0
 	github.com/mitchellh/go-homedir v1.1.0
 	github.com/spf13/cobra v1.0.0
 	github.com/spf13/pflag v1.0.5 // indirect

go.sum

@@ -38,6 +38,8 @@ github.com/dgryski/go-farm v0.0.0-20190423205320-6a90982ecee2/go.mod h1:SqUrOPUn
 github.com/dgryski/go-sip13 v0.0.0-20181026042036-e10d5fee7954/go.mod h1:vAd38F8PWV+bWy6jNmig1y/TA+kYO4g3RSRF0IAv0no=
 github.com/dustin/go-humanize v1.0.0 h1:VSnTsYCnlFHaM2/igO1h6X3HA71jcobQuxemgkq4zYo=
 github.com/dustin/go-humanize v1.0.0/go.mod h1:HtrtbFcZ19U5GC7JDqmcUSB87Iq5E25KnS6fMYU6eOk=
+github.com/equinox-io/equinox v1.2.0 h1:bBS7Ou+Y7Jwgmy8TWSYxEh85WctuFn7FPlgbUzX4DBA=
+github.com/equinox-io/equinox v1.2.0/go.mod h1:6s3HJB0PYUNgs0mxmI8fHdfVl3TQ25ieA/PVfr+eyVo=
 github.com/fsnotify/fsnotify v1.4.7 h1:IXs+QLmnXW2CcXuY+8Mzv/fWEsPGWxqefPtCP5CnV9I=
 github.com/fsnotify/fsnotify v1.4.7/go.mod h1:jwhsz4b93w/PPRr/qN1Yymfu8t87LnFCMoQvtojpjFo=
 github.com/ghodss/yaml v1.0.0/go.mod h1:4dBDuWmgqj2HViK6kFavaiC9ZROes6MMH2rRYeMEF04=

release

@@ -0,0 +1,7 @@
+equinox release \
+  --version=$(git describe --tags) \
+  --platforms="darwin_amd64 darwin_arm64 linux_arm linux_arm64 linux_amd64 windows_amd64 windows_arm64" \
+  --signing-key=${EQUINOX_KEY} \
+  --app="app_gCwJN1DfmYU" \
+  --token="${EQUINOX_TOKEN}" \
+  go.transparencylog.net/tl