69 lines
1.2 KiB
Go
69 lines
1.2 KiB
Go
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package cli
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import (
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"fmt"
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"strings"
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)
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type step struct {
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do func()
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success *step
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error *step
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desc string
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}
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func (s *step) run(p interface{}) {
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s.callDo(p)
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switch {
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case s.success != nil:
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s.success.run(p)
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case p == nil:
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return
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default:
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if code, ok := p.(exit); ok {
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exiter(int(code))
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return
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}
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panic(p)
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}
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}
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func (s *step) callDo(p interface{}) {
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if s.do == nil {
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return
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}
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defer func() {
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if e := recover(); e != nil {
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if s.error == nil {
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panic(p)
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}
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s.error.run(e)
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}
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}()
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s.do()
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}
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func (s *step) dot() string {
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trs := flowDot(s, map[*step]bool{})
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return fmt.Sprintf("digraph G {\n\trankdir=LR\n%s\n}\n", strings.Join(trs, "\n"))
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}
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func flowDot(s *step, visited map[*step]bool) []string {
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res := []string{}
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if visited[s] {
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return res
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}
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visited[s] = true
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if s.success != nil {
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res = append(res, fmt.Sprintf("\t\"%s\" -> \"%s\" [label=\"ok\"]", s.desc, s.success.desc))
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res = append(res, flowDot(s.success, visited)...)
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}
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if s.error != nil {
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res = append(res, fmt.Sprintf("\t\"%s\" -> \"%s\" [label=\"ko\"]", s.desc, s.error.desc))
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res = append(res, flowDot(s.error, visited)...)
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}
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return res
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}
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