Struct SystemFunc

lang/core/os/system.go:73–88

SystemFunc runs a string as a shell command, then produces each line from stdout. If the input string changes, then the commands are executed one after the other and the concatenation of their outputs is produced line by line. Note that in the likely case in which the process emits several lines on

// coordination. If you are using this for an intermediate value, or a
// non-declarative system, then it's likely you are using this wrong.
type SystemFunc struct {
	interfaces.Textarea

	init   *interfaces.Init
	cancel context.CancelFunc

	input chan string // stream of inputs

	last   *string // the active command
	output *string // the last output

	values chan string

	count int
	mutex *sync.Mutex
}

// String returns a simple name for this function. This is needed so this struct
// can satisfy the pgraph.Vertex interface.