feat: add update checking

go.mod

@@ -6,4 +6,5 @@ require (
 	github.com/pterm/pterm v0.12.17
 	github.com/spf13/cobra v1.1.3
 	github.com/spf13/pflag v1.0.5
+	github.com/tidwall/gjson v1.8.0
 )

go.sum

@@ -175,6 +175,12 @@ github.com/stretchr/testify v1.6.1/go.mod h1:6Fq8oRcR53rry900zMqJjRRixrwX3KX962/
 github.com/stretchr/testify v1.7.0 h1:nwc3DEeHmmLAfoZucVR881uASk0Mfjw8xYJ99tb5CcY=
 github.com/stretchr/testify v1.7.0/go.mod h1:6Fq8oRcR53rry900zMqJjRRixrwX3KX962/h/Wwjteg=
 github.com/subosito/gotenv v1.2.0/go.mod h1:N0PQaV/YGNqwC0u51sEeR/aUtSLEXKX9iv69rRypqCw=
+github.com/tidwall/gjson v1.8.0 h1:Qt+orfosKn0rbNTZqHYDqBrmm3UDA4KRkv70fDzG+PQ=
+github.com/tidwall/gjson v1.8.0/go.mod h1:5/xDoumyyDNerp2U36lyolv46b3uF/9Bu6OfyQ9GImk=
+github.com/tidwall/match v1.0.3 h1:FQUVvBImDutD8wJLN6c5eMzWtjgONK9MwIBCOrUJKeE=
+github.com/tidwall/match v1.0.3/go.mod h1:eRSPERbgtNPcGhD8UCthc6PmLEQXEWd3PRB5JTxsfmM=
+github.com/tidwall/pretty v1.1.0 h1:K3hMW5epkdAVwibsQEfR/7Zj0Qgt4DxtNumTq/VloO8=
+github.com/tidwall/pretty v1.1.0/go.mod h1:XNkn88O1ChpSDQmQeStsy+sBenx6DDtFZJxhVysOjyk=
 github.com/tmc/grpc-websocket-proxy v0.0.0-20190109142713-0ad062ec5ee5/go.mod h1:ncp9v5uamzpCO7NfCPTXjqaC+bZgJeR0sMTm6dMHP7U=
 github.com/xiang90/probing v0.0.0-20190116061207-43a291ad63a2/go.mod h1:UETIi67q53MR2AWcXfiuqkDkRtnGDLqkBTpCHuJHxtU=
 github.com/xo/terminfo v0.0.0-20210125001918-ca9a967f8778 h1:QldyIu/L63oPpyvQmHgvgickp1Yw510KJOqX7H24mg8=

pcli.go

@@ -1,16 +1,23 @@
 package pcli
 
 import (
+	"io/ioutil"
+	"net/http"
+	"runtime"
 	"strings"
 	"time"
 
 	"github.com/pterm/pterm"
 	"github.com/spf13/cobra"
 	"github.com/spf13/pflag"
+	"github.com/tidwall/gjson"
 )
 
 var rootCmd *cobra.Command
 
+// EnableUpdateChecking automatically checks if a new version of your application is pushed, and notifies the user.
+var EnableUpdateChecking = true
+
 // SetRootCmd sets your rootCmd.
 func SetRootCmd(cmd *cobra.Command) {
 	rootCmd = cmd
@@ -28,6 +35,42 @@ func Setup() {
 	rootCmd.SetVersionTemplate(VersionTemplate())
 	rootCmd.SetOut(PcliOut())
 	rootCmd.SetErr(Err())
+	CheckForUpdates()
+}
+
+// CheckForUpdates checks if a new version of your application is pushed, and notifies the user, if EnableUpdateChecking is true.
+func CheckForUpdates() error {
+	if EnableUpdateChecking {
+		resp, err := http.Get(pterm.Sprintf("https://api.github.com/repos/%s/releases/latest", getRepoPath()))
+		if err != nil {
+			return err
+		}
+		defer resp.Body.Close()
+
+		body, err := ioutil.ReadAll(resp.Body)
+		if err != nil {
+			return err
+		}
+
+		tagName := gjson.Get(string(body), "tag_name").String()
+
+		if rootCmd.Version != tagName {
+			format := "A new version of %s is availble (%s)!\n"
+			format += "You can install the new version with: "
+
+			switch runtime.GOOS {
+			case "windows":
+				format += pterm.Magenta(pterm.Sprintf(`iwr instl.sh/%s/windows | iex`, getRepoPath()))
+			case "darwin":
+				format += pterm.Magenta(pterm.Sprintf(`curl -sSL instl.sh/%s/macos | sudo bash`, getRepoPath()))
+			default:
+				format += pterm.Magenta(pterm.Sprintf(`curl -sSL instl.sh/%s/linux | sudo bash`, getRepoPath()))
+			}
+			pterm.Info.Printfln(format, rootCmd.Name(), pterm.Magenta(tagName))
+		}
+	}
+
+	return nil
 }
 
 // GetCiCommand returns a custom crafted CI command. This must be used when using https://github.com/pterm/cli-template.

pterm-ci-cmd.go

@@ -119,6 +119,17 @@ func detectOriginURL() (url string) {
 	return
 }
 
+func getRepo() (username, reponame string) {
+	projectParts := strings.Split(strings.TrimPrefix(detectOriginURL(), "https://github.com/"), "/")
+
+	return projectParts[0], projectParts[1]
+}
+
+func getRepoPath() string {
+	username, reponame := getRepo()
+	return pterm.Sprintf("%s/%s", username, reponame)
+}
+
 func walkOverExt(path, exts string, f func(path string)) {
 	_ = filepath.Walk(getPathTo(path), func(path string, info fs.FileInfo, err error) error {
 		for _, ext := range strings.Split(exts, ",") {