add system install for gitlab runner

Signed-off-by: Nikhil Sharma <nikhilsharma230303@gmail.com>

cmd/system/gitlab_runner.go

@@ -0,0 +1,93 @@
+// Copyright (c) arkade author(s) 2022. All rights reserved.
+// Licensed under the MIT license. See LICENSE file in the project root for full license information.
+
+package system
+
+import (
+	"fmt"
+	"log"
+	"os"
+	"strings"
+
+	"github.com/alexellis/arkade/pkg/env"
+	"github.com/alexellis/arkade/pkg/get"
+	"github.com/spf13/cobra"
+)
+
+func MakeInstallGitLabRunner() *cobra.Command {
+	command := &cobra.Command{
+		Use:   "gitlab-runner",
+		Short: "Install GitLab Runner",
+		Long:  `Install GitLab Runner for self-hosted CI.`,
+		Example: `  arkade system install gitlab-runner
+  arkade system install gitlab-runner --version <version>`,
+		SilenceUsage: true,
+	}
+
+	command.Flags().StringP("version", "v", "", "The version or leave blank to determine the latest available version")
+	command.Flags().String("path", "$HOME/gitlab-runner", "Installation path, where gitlab-runner binary file is downloaded")
+	command.Flags().Bool("progress", true, "Show download progress")
+	command.Flags().String("arch", "", "CPU architecture i.e. amd64")
+
+	command.PreRunE = func(cmd *cobra.Command, args []string) error {
+		return nil
+	}
+
+	command.RunE = func(cmd *cobra.Command, args []string) error {
+		installPath, _ := cmd.Flags().GetString("path")
+		version, _ := cmd.Flags().GetString("version")
+		fmt.Printf("Installing GitLab Runner to %s\n", installPath)
+
+		installPath = strings.ReplaceAll(installPath, "$HOME", os.Getenv("HOME"))
+
+		arch, osVer := env.GetClientArch()
+
+		if strings.ToLower(osVer) != "linux" {
+			return fmt.Errorf("this app only supports Linux")
+		}
+
+		if cmd.Flags().Changed("arch") {
+			arch, _ = cmd.Flags().GetString("arch")
+		}
+
+		dlArch := arch
+		if arch == "x86_64" {
+			dlArch = "amd64"
+		} else if arch == "aarch64" {
+			dlArch = "arm64"
+		} else if arch == "armv7" || arch == "armv7l" {
+			dlArch = "arm"
+		}
+
+		if version == "" {
+			version = "latest"
+		} else if !strings.HasPrefix(version, "v") {
+			version = "v" + version
+		}
+
+		fmt.Printf("Installing version: %s for: %s\n", version, dlArch)
+
+		dlURL := fmt.Sprintf("https://gitlab-runner-downloads.s3.amazonaws.com/%s/binaries/gitlab-runner-linux-%s", version, dlArch)
+
+		fmt.Printf("Downloading from: %s\n", dlURL)
+
+		progress, _ := cmd.Flags().GetBool("progress")
+		outPath, err := get.DownloadFileP(dlURL, progress)
+		if err != nil {
+			return err
+		}
+		defer os.Remove(outPath)
+
+		fmt.Printf("Downloaded to: %s\n", outPath)
+
+		if _, err := get.CopyFile(outPath, installPath); err != nil {
+			log.Fatal(err)
+		}
+
+		fmt.Printf("Binary file copied to: %s\n", installPath)
+
+		return nil
+	}
+
+	return command
+}

cmd/system/install.go

@@ -30,6 +30,7 @@ func MakeInstall() *cobra.Command {
 	command.AddCommand(MakeInstallNode())
 	command.AddCommand(MakeInstallTCRedirectTap())
 	command.AddCommand(MakeInstallRegistry())
+	command.AddCommand(MakeInstallGitLabRunner())
 
 	return command
 }