86 lines
2.0 KiB
Go
86 lines
2.0 KiB
Go
package shell
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import (
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"fmt"
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"io"
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"os"
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"os/exec"
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"syscall"
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"github.com/hashicorp/packer/packer"
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"github.com/hashicorp/packer/template/interpolate"
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)
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type Communicator struct {
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ExecuteCommand []string
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Ctx interpolate.Context
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}
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func (c *Communicator) Start(cmd *packer.RemoteCmd) error {
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// Render the template so that we know how to execute the command
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c.Ctx.Data = &ExecuteCommandTemplate{
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Command: cmd.Command,
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}
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for i, field := range c.ExecuteCommand {
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command, err := interpolate.Render(field, &c.Ctx)
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if err != nil {
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return fmt.Errorf("Error processing command: %s", err)
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}
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c.ExecuteCommand[i] = command
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}
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// Build the local command to execute
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localCmd := exec.Command(c.ExecuteCommand[0], c.ExecuteCommand[1:]...)
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localCmd.Stdin = cmd.Stdin
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localCmd.Stdout = cmd.Stdout
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localCmd.Stderr = cmd.Stderr
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// Start it. If it doesn't work, then error right away.
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if err := localCmd.Start(); err != nil {
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return err
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}
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// We've started successfully. Start a goroutine to wait for
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// it to complete and track exit status.
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go func() {
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var exitStatus int
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err := localCmd.Wait()
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if err != nil {
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if exitErr, ok := err.(*exec.ExitError); ok {
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exitStatus = 1
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// There is no process-independent way to get the REAL
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// exit status so we just try to go deeper.
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if status, ok := exitErr.Sys().(syscall.WaitStatus); ok {
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exitStatus = status.ExitStatus()
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}
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}
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}
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cmd.SetExited(exitStatus)
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}()
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return nil
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}
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func (c *Communicator) Upload(string, io.Reader, *os.FileInfo) error {
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return fmt.Errorf("upload not supported")
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}
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func (c *Communicator) UploadDir(string, string, []string) error {
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return fmt.Errorf("uploadDir not supported")
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}
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func (c *Communicator) Download(string, io.Writer) error {
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return fmt.Errorf("download not supported")
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}
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func (c *Communicator) DownloadDir(string, string, []string) error {
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return fmt.Errorf("downloadDir not supported")
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}
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type ExecuteCommandTemplate struct {
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Command string
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}
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