feat: add feature to send library update message (#174)

* feat: add feature to send library update message

Author: shrimalmadhur

cmd/eigenlayer/main.go

@@ -4,8 +4,10 @@ import (
 	"fmt"
 	"os"
 
+	"github.com/Layr-Labs/eigenlayer-cli/internal/versionupdate"
 	"github.com/Layr-Labs/eigenlayer-cli/pkg"
 	"github.com/Layr-Labs/eigenlayer-cli/pkg/utils"
+
 	"github.com/urfave/cli/v2"
 )
 
@@ -32,6 +34,10 @@ func main() {
 
 	// Initialize the dependencies
 	prompter := utils.NewPrompter()
+	app.After = func(c *cli.Context) error {
+		versionupdate.Check(app.Version)
+		return nil
+	}
 
 	app.Commands = append(app.Commands, pkg.OperatorCmd(prompter))
 	app.Commands = append(app.Commands, pkg.RewardsCmd(prompter))

go.mod

@@ -7,6 +7,7 @@ require (
 	github.com/Layr-Labs/eigenlayer-contracts v0.3.0-rc3-holesky-preprod-rewards.0.20240618161038-04a0176562a0
 	github.com/Layr-Labs/eigenlayer-rewards-proofs v0.2.3
 	github.com/Layr-Labs/eigensdk-go v0.1.9
+	github.com/blang/semver/v4 v4.0.0
 	github.com/consensys/gnark-crypto v0.12.1
 	github.com/ethereum/go-ethereum v1.14.5
 	github.com/fatih/color v1.17.0

go.sum

@@ -58,6 +58,8 @@ github.com/beorn7/perks v1.0.1 h1:VlbKKnNfV8bJzeqoa4cOKqO6bYr3WgKZxO8Z16+hsOM=
 github.com/beorn7/perks v1.0.1/go.mod h1:G2ZrVWU2WbWT9wwq4/hrbKbnv/1ERSJQ0ibhJ6rlkpw=
 github.com/bits-and-blooms/bitset v1.10.0 h1:ePXTeiPEazB5+opbv5fr8umg2R/1NlzgDsyepwsSr88=
 github.com/bits-and-blooms/bitset v1.10.0/go.mod h1:7hO7Gc7Pp1vODcmWvKMRA9BNmbv6a/7QIWpPxHddWR8=
+github.com/blang/semver/v4 v4.0.0 h1:1PFHFE6yCCTv8C1TeyNNarDzntLi7wMI5i/pzqYIsAM=
+github.com/blang/semver/v4 v4.0.0/go.mod h1:IbckMUScFkM3pff0VJDNKRiT6TG/YpiHIM2yvyW5YoQ=
 github.com/btcsuite/btcd/btcec/v2 v2.2.0 h1:fzn1qaOt32TuLjFlkzYSsBC35Q3KUjT1SwPxiMSCF5k=
 github.com/btcsuite/btcd/btcec/v2 v2.2.0/go.mod h1:U7MHm051Al6XmscBQ0BoNydpOTsFAn707034b5nY8zU=
 github.com/btcsuite/btcd/chaincfg/chainhash v1.0.1 h1:q0rUy8C/TYNBQS1+CGKw68tLOFYSNEs0TFnxxnS9+4U=

internal/versionupdate/check_version_update.go

@@ -0,0 +1,74 @@
+package versionupdate
+
+import (
+	"encoding/json"
+	"fmt"
+	"io"
+	"net/http"
+
+	"github.com/fatih/color"
+
+	"github.com/blang/semver/v4"
+)
+
+const (
+	organization = "Layr-Labs"
+	repository   = "eigenlayer-cli"
+)
+
+type release struct {
+	TagName string `json:"tag_name"`
+	Name    string `json:"name"`
+}
+
+// Check if there is a new version of the package
+// If there is, print a message to the user
+// If there isn't, do nothing
+// Don't do anything for development version
+// If anything fails in this, it will silently pass since this doesn't affect operations
+func Check(currentVersion string) {
+	if currentVersion == "development" {
+		fmt.Println("Running development version")
+		return
+	}
+
+	// Get latest version from GitHub releases
+	latestReleaseUrl := fmt.Sprintf("https://api.github.com/repos/%s/%s/releases/latest", organization, repository)
+	response, err := http.Get(latestReleaseUrl)
+	if err != nil {
+		return
+	}
+	defer response.Body.Close()
+	respBytes, err := io.ReadAll(response.Body)
+	if err != nil {
+		return
+	}
+	var data release
+
+	err = json.Unmarshal(respBytes, &data)
+	if err != nil {
+		return
+	}
+
+	// GitHub API returns in vX.X.X format so remove v
+	latestVersion := data.TagName[1:]
+	latestSemVer, err := semver.Make(latestVersion)
+	if err != nil {
+		return
+	}
+
+	currentSemVer, err := semver.Make(currentVersion)
+	if err != nil {
+		return
+	}
+
+	if latestSemVer.GT(currentSemVer) {
+		greenVersion := color.GreenString(latestVersion)
+		yellowOldVersion := color.YellowString(currentVersion)
+		fmt.Println()
+		fmt.Printf("There is a new version (%s) for this library available.\n", greenVersion)
+		fmt.Printf("Your current running verison is (%s).\n", yellowOldVersion)
+		fmt.Println("Please update (https://github.com/Layr-Labs/eigenlayer-cli#install-eigenlayer-cli-using-a-binary) to get latest features and bug fixes.")
+		fmt.Println()
+	}
+}