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/
root.go
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/
root.go
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// Copyright © 2017 Intel Corporation
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package cmd
import (
"fmt"
"os"
"github.com/ciao-project/ciao/client"
"github.com/intel/tfortools"
"github.com/pkg/errors"
"github.com/spf13/cobra"
)
var c client.Client
var template string
var rootUsageFunc (func(cmd *cobra.Command) error)
func render(cmd *cobra.Command, data interface{}) error {
if template == "" && cmd.Annotations != nil {
template = cmd.Annotations["default_template"]
}
if template == "" {
template = "{{ htable (sliceof .) }}"
}
return errors.Wrap(tfortools.OutputToTemplate(os.Stdout, "", template, data, nil),
"Error generating template output")
}
func templatedUsageFunc(cmd *cobra.Command) error {
err := rootUsageFunc(cmd)
if err != nil {
return err
}
if cmd.Annotations == nil {
return nil
}
templateUsage := cmd.Annotations["template_usage"]
if templateUsage != "" {
writer := cmd.OutOrStdout()
fmt.Fprintf(writer, "\nWhen using the template flag the following structure is provided:\n\n")
fmt.Fprintf(writer, templateUsage)
}
return nil
}
const (
ciaoControllerEnv = "CIAO_CONTROLLER"
ciaoCACertFileEnv = "CIAO_CA_CERT_FILE"
ciaoClientCertFileEnv = "CIAO_CLIENT_CERT_FILE"
ciaoTenantIDEnv = "CIAO_TENANT_ID"
)
func getCiaoEnvVariables() {
c.ControllerURL = os.Getenv(ciaoControllerEnv)
c.CACertFile = os.Getenv(ciaoCACertFileEnv)
c.ClientCertFile = os.Getenv(ciaoClientCertFileEnv)
c.TenantID = os.Getenv(ciaoTenantIDEnv)
}
var rootCmd = &cobra.Command{
Use: "ciao",
Long: `
Command line interface for the Cloud Integrated Advanced Orchestrator (CIAO).
The CIAO CLI sends HTTPS requests to the CIAO controller enabling one to control a CIAO cluster.`,
}
// Execute adds all child commands to the root command and sets flags appropriately.
// This is called by main.main(). It only needs to happen once to the rootCmd.
func Execute() {
if err := rootCmd.Execute(); err != nil {
os.Exit(1)
}
}
func init() {
getCiaoEnvVariables()
if err := c.Init(); err != nil {
fmt.Fprintf(os.Stderr, "Failed to init the CLI: %s\n", err)
os.Exit(1)
}
rootUsageFunc = rootCmd.UsageFunc()
rootCmd.SetUsageFunc(templatedUsageFunc)
rootCmd.PersistentFlags().StringVarP(&template, "template", "f", "", "Template used to format output")
rootCmd.SilenceUsage = true
}