为什么以下使用 cobra 包的 CLI 程序在运行时会抛出堆栈溢出错误go run /tmp/test.go branch leaf,但当叶子命令直接连接到 root 时不会出错(如主函数中所述)?这表明我没有正确使用 cobra PersistenRun* 功能。我对 PersistenRun* 函数的理解是它们仅适用于命令的子级。问题似乎是命令的父级已以某种方式设置为命令本身。package mainimport ( "fmt" "os" "path" "github.com/spf13/cobra")var programName = path.Base(os.Args[0])var rootCmd = &cobra.Command{ Use: programName, PersistentPreRun: func(cmd *cobra.Command, args []string) { fmt.Println("in root pre run") },}var branchCmd = &cobra.Command{ Use: "branch", PersistentPreRun: func(cmd *cobra.Command, args []string) { cmd.Parent().PersistentPreRun(cmd, args) fmt.Println("in branch pre run") },}var leafCmd = &cobra.Command{ Use: "leaf", PersistentPreRun: func(cmd *cobra.Command, args []string) { cmd.Parent().PersistentPreRun(cmd, args) fmt.Println("in leaf pre run") }, Run: func(cmd *cobra.Command, args []string) { fmt.Println("in leaf run") },}func main() { branchCmd.AddCommand(leafCmd) rootCmd.AddCommand(branchCmd) rootCmd.Execute() // If I connect the root to the leaf directly, like the following, then // the program no longer stack overflow // rootCmd.AddCommand(leafCmd) // rootCmd.Execute()}
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凤凰求蛊
TA贡献1825条经验 获得超4个赞
NVM,我想通了。
而不是
PersistentPreRun: func(cmd *cobra.Command, args []string) {
cmd.Parent().PersistentPreRun(cmd, args)
fmt.Println("in * pre run")
},
它应该是:
PersistentPreRun: func(cmd *cobra.Command, args []string) {
cmd.Parent().PersistentPreRun(cmd.Parent(), args)
fmt.Println("in * pre run")
},
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