Method compile

lang/preview.go:92–149

(tree *[]functions.FunctionT, procs *[]Process)

}

func (pc *previewCacheT) compile(tree *[]functions.FunctionT, procs *[]Process) error {
	pc.mutex.Lock()
	defer pc.mutex.Unlock()

	if pc.err != nil {
		return pc.err
	}

	s := make([]string, len(*tree))
	for i := range s {
		s[i] = string((*tree)[i].Raw)
	}

	offset, err := pc.compare(s)
	if err != nil {
		pc.err = err
		return err
	}

	if len(pc.raw) > 0 {

		safe := parser.GetSafeCmds()
		for i := offset + 1; i < len(*tree)-1; i++ {
			cmd := string((*tree)[i].CommandName())
		check:
			switch {
			case cmd == ExpressionFunctionName:
				continue
			case cmd == "exec" && !strings.HasPrefix(s[i], cmd):
				if len((*tree)[i].Parameters) > 0 {
					cmd = string((*tree)[i].Parameters[0])
					goto check
				}
			case !strings.HasPrefix(s[i], cmd):
				return fmt.Errorf("a command executable has changed name: %s", errPressF9)
			case !lists.Match(safe, cmd):
				return fmt.Errorf("a command line change has been made prior to potentially unsafe commands: %s", errPressF9)
			}
		}

	}

	pc.grow(s)

	for i := 0; i < len(*procs)-1; i++ {
		(*procs)[i].cache = new(cacheT)
		(*procs)[i].cache.b = &pc.cache[i]
		(*procs)[i].cache.dt = &pc.dt[i]
		(*procs)[i].Stdout, (*procs)[i].cache.tee.stdout = streams.NewTee((*procs)[i].Stdout)
		(*procs)[i].Stderr, (*procs)[i].cache.tee.stderr = streams.NewTee((*procs)[i].Stderr)

		if i <= offset {
			(*procs)[i].cache.use = true
		}
	}

	return nil
}