feat:[STO-10833]: set clone cache path as env variable (#46)

* feat:[STO-10833]: updated the env for child process to add clone cache path

Author: dheeraj-varshney

plugin/harness/execer.go

@@ -153,7 +153,8 @@ func (e *Execer) runShellExecutable(ctx context.Context, out *spec) error {
 		script := fmt.Sprintf(
 			"$ErrorActionPreference = 'Stop'; $ProgressPreference = 'SilentlyContinue'; %s", path)
 		cmd := exec.Command("pwsh", "-Command", script)
-		return runCmds(ctx, []*exec.Cmd{cmd}, e.Environ, e.Workdir, e.Stdout, e.Stderr)
+		envWithClonePath := append(e.Environ, fmt.Sprintf("CLONE_CACHE_PATH=%s", e.Source))
+		return runCmds(ctx, []*exec.Cmd{cmd}, envWithClonePath, e.Workdir, e.Stdout, e.Stderr)
 	case "linux", "darwin":
 		path := filepath.Join(e.Source, out.Run.Bash.Path)
 
@@ -166,7 +167,8 @@ func (e *Execer) runShellExecutable(ctx context.Context, out *spec) error {
 		slog.Debug("execute", slog.String("file", path))
 
 		cmd := exec.Command(shell, path)
-		return runCmds(ctx, []*exec.Cmd{cmd}, e.Environ, e.Workdir, e.Stdout, e.Stderr)
+		envWithClonePath := append(e.Environ, fmt.Sprintf("CLONE_CACHE_PATH=%s", e.Source))
+		return runCmds(ctx, []*exec.Cmd{cmd}, envWithClonePath, e.Workdir, e.Stdout, e.Stderr)
 	default:
 		return fmt.Errorf("unsupported operating system: %s", runtime.GOOS)
 	}