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utils.go
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/
utils.go
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/*
* Copyright 2018-2019, CS Systemes d'Information, http://www.c-s.fr
*
* 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 commands
import (
"bufio"
"fmt"
"github.com/CS-SI/SafeScale/lib/utils/scerr"
"os"
"os/exec"
//log "github.com/sirupsen/logrus"
"github.com/urfave/cli"
"github.com/CS-SI/SafeScale/cli/perform/enums/ExitCode"
"github.com/CS-SI/SafeScale/lib/server/cluster"
clusterapi "github.com/CS-SI/SafeScale/lib/server/cluster/api"
"github.com/CS-SI/SafeScale/lib/utils/concurrency"
)
var (
clusterName string
clusterInstance clusterapi.Cluster
nodeName string
serviceName string
featureName string
// RebrandingPrefix is used to store the optional prefix to use when calling external SafeScale commands
RebrandingPrefix string
)
// RebrandCommand allows to prefix a command with cmds.RebrandingPrefix
// ie: with cmds.RebrandingPrefix == "safe "
// "safescale ..." becomes "safe deploy ..."
// with cmds.RebrandingPrefix == "my"
// "perform ..." becomes "myperform ..."
func RebrandCommand(command string) string {
return fmt.Sprintf("%s%s", RebrandingPrefix, command)
}
// func runCommand(cmdStr string) error {
// cmd := exec.Command("bash", "-c", cmdStr)
// err := cmd.Run()
// if err != nil {
// output, _, err := system.ExtractRetCode(err)
// if err != nil {
// msg := fmt.Sprintf("failed to extract return code: %s", err.Error())
// return cli.NewExitError(msg, int(ExitCode.Run))
// }
// msg := fmt.Sprintf("failed to execute command: %s", output)
// return cli.NewExitError(msg, int(ExitCode.Run))
// }
// return nil
// }
func runCommand(cmdStr string) error {
cmd := exec.Command("bash", "-c", cmdStr)
stdout, _ := cmd.StdoutPipe()
stderr, _ := cmd.StderrPipe()
stdoutScanner := bufio.NewScanner(stdout)
stderrScanner := bufio.NewScanner(stderr)
go func() {
for stdoutScanner.Scan() {
fmt.Println(stdoutScanner.Text())
}
}()
go func() {
for stderrScanner.Scan() {
_, _ = fmt.Fprintln(os.Stderr, stderrScanner.Text())
}
}()
err := cmd.Start()
if err != nil {
return cli.NewExitError(err.Error(), int(ExitCode.Run))
}
err = cmd.Wait()
if err != nil {
return cli.NewExitError(err.Error(), int(ExitCode.Run))
}
return nil
}
func extractClusterArgument(c *cli.Context) error {
var err error
if !c.Command.HasName("list") {
clusterName = c.Args().First()
if clusterName == "" {
return cli.NewExitError("Invalid argument CLUSTERNAME", int(ExitCode.InvalidArgument))
}
clusterInstance, err = cluster.Load(concurrency.RootTask(), clusterName)
if err != nil {
if _, ok := err.(scerr.ErrNotFound); ok {
msg := fmt.Sprintf("Cluster '%s' not found\n", clusterName)
return cli.NewExitError(msg, int(ExitCode.NotFound))
}
msg := fmt.Sprintf("failed to get cluster '%s' information: %s\n", clusterName, err.Error())
return cli.NewExitError(msg, int(ExitCode.RPC))
}
if c.Command.HasName("create") {
msg := fmt.Sprintf("Cluster '%s' already exists", clusterName)
return cli.NewExitError(msg, int(ExitCode.Duplicate))
}
}
return nil
}
func extractNodeArgument(c *cli.Context) error {
if !c.Command.HasName("list") {
nodeName = c.Args().Get(1)
if nodeName == "" {
return cli.NewExitError("Invalid argument NODENAME", int(ExitCode.InvalidArgument))
}
}
return nil
}
func extractFeatureArgument(c *cli.Context) error {
if !c.Command.HasName("list") {
featureName := c.Args().Get(1)
if featureName == "" {
return cli.NewExitError("Invalid argument FEATURENAME", int(ExitCode.InvalidArgument))
}
}
return nil
}