53 lines
1.4 KiB
Go
53 lines
1.4 KiB
Go
package packer
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import (
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"io"
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"time"
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)
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// RemoteCmd represents a remote command being prepared or run.
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type RemoteCmd struct {
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// Command is the command to run remotely. This is executed as if
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// it were a shell command, so you are expected to do any shell escaping
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// necessary.
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Command string
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// Stdin specifies the process's standard input. If Stdin is
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// nil, the process reads from an empty bytes.Buffer.
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Stdin io.Reader
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// Stdout and Stderr represent the process's standard output and
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// error.
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//
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// If either is nil, it will be set to ioutil.Discard.
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Stdout io.Writer
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Stderr io.Writer
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// This will be set to true when the remote command has exited. It
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// shouldn't be set manually by the user, but there is no harm in
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// doing so.
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Exited bool
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// Once Exited is true, this will contain the exit code of the process.
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ExitStatus int
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}
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// A Communicator is the interface used to communicate with the machine
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// that exists that will eventually be packaged into an image. Communicators
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// allow you to execute remote commands, upload files, etc.
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//
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// Communicators must be safe for concurrency, meaning multiple calls to
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// Start or any other method may be called at the same time.
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type Communicator interface {
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Start(*RemoteCmd) error
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Upload(string, io.Reader) error
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Download(string, io.Writer) error
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}
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// Wait waits for the remote command to complete.
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func (r *RemoteCmd) Wait() {
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for !r.Exited {
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time.Sleep(50 * time.Millisecond)
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}
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}
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