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host_setup.go
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host_setup.go
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package operations
import (
"context"
"fmt"
"os"
"time"
"github.com/evergreen-ci/evergreen"
"github.com/evergreen-ci/evergreen/model/host"
"github.com/evergreen-ci/evergreen/util"
"github.com/mongodb/grip"
"github.com/mongodb/jasper"
"github.com/pkg/errors"
"github.com/urfave/cli"
)
const (
setupTimeout = 2 * time.Minute
)
func hostSetup() cli.Command {
return cli.Command{
Name: "setup",
Usage: "run setup script on a build host",
Flags: []cli.Flag{
cli.StringFlag{
Name: "working_directory",
Usage: "working directory for the script",
},
cli.BoolFlag{
Name: "setup_as_sudo",
Usage: "run the setup script with sudo",
},
},
Action: func(c *cli.Context) error {
wd := c.String("working_directory")
setupAsSudo := c.Bool("setup_as_sudo")
ctx, cancel := context.WithTimeout(context.Background(), setupTimeout)
defer cancel()
return errors.WithStack(runSetupScript(ctx, wd, setupAsSudo))
},
}
}
func runSetupScript(ctx context.Context, wd string, setupAsSudo bool) error {
grip.Warning(os.MkdirAll(wd, 0777))
if _, err := os.Stat(evergreen.SetupScriptName); err == nil {
setup := host.ShCommandWithSudo(evergreen.TempSetupScriptName, setupAsSudo)
return runScript(ctx,
wd,
evergreen.SetupScriptName,
evergreen.TempSetupScriptName,
setup,
setupAsSudo)
} else if _, err = os.Stat(evergreen.PowerShellSetupScriptName); err == nil {
setup := []string{"powershell", "./" + evergreen.PowerShellTempSetupScriptName}
return runScript(ctx,
wd,
evergreen.PowerShellSetupScriptName,
evergreen.PowerShellTempSetupScriptName,
setup,
setupAsSudo)
}
return nil
}
// runScript ensures a shell script has proper permissions and runs it. The
// script is deleted.
func runScript(ctx context.Context, wd, scriptFileName, tempFileName string, runScriptArgs []string, sudo bool) error {
if err := os.Rename(scriptFileName, tempFileName); os.IsNotExist(err) {
return nil
}
chmod := host.ChmodCommandWithSudo(tempFileName, sudo)
if output, err := runCmd(ctx, chmod); err != nil {
return errors.Wrap(err, output)
}
catcher := grip.NewSimpleCatcher()
output, err := runCmd(ctx, runScriptArgs)
catcher.Add(err)
if err == nil {
fmt.Println(output)
}
catcher.Add(os.Remove(tempFileName))
return errors.Wrap(catcher.Resolve(), output)
}
// runCmd runs the given command and returns the output.
func runCmd(ctx context.Context, args []string) (string, error) {
output := util.NewMBCappedWriter()
cmd := jasper.NewCommand().Add(args).SetCombinedWriter(output)
err := cmd.Run(ctx)
return output.String(), err
}