Added grafana-cli command. Added public documentation for specifying plugin version when installing. (#5665)

pkg/cmd/grafana-cli/commands/listversions_command.go

@@ -0,0 +1,36 @@
+package commands
+
+import (
+	"errors"
+
+	"github.com/grafana/grafana/pkg/cmd/grafana-cli/logger"
+	s "github.com/grafana/grafana/pkg/cmd/grafana-cli/services"
+)
+
+func validateVersionInput(c CommandLine) error {
+	arg := c.Args().First()
+	if arg == "" {
+		return errors.New("please specify plugin to list versions for")
+	}
+
+	return nil
+}
+
+func listversionsCommand(c CommandLine) error {
+	if err := validateVersionInput(c); err != nil {
+		return err
+	}
+
+	pluginToList := c.Args().First()
+
+	plugin, err := s.GetPlugin(pluginToList, c.GlobalString("repo"))
+	if err != nil {
+		return err
+	}
+
+	for _, i := range plugin.Versions {
+		logger.Infof("%v\n", i.Version)
+	}
+
+	return nil
+}