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added persistent pre/post commands.

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This commit is contained in:
Alexander Thaller 2015-02-17 22:09:49 +01:00 committed by Eric Paris
parent 2df64026ba
commit fbce60cc56
1 changed files with 21 additions and 1 deletions
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20
command.go
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@ -65,6 +65,10 @@ type Command struct {
// PostRun runs the command after run.
// The args are the arguments after the command name.
PostRun func(cmd *Command, args []string)
// PreRun which children of this command will inherit.
PersistentPreRun func(cmd *Command, args []string)
// PostRun which children of this command will inherit.
PersistentPostRun func(cmd *Command, args []string)
// Commands is the list of commands supported by this program.
commands []*Command
// Parent Command for this command
@ -455,6 +459,9 @@ func (c *Command) execute(a []string) (err error) {
c.preRun()
argWoFlags := c.Flags().Args()
if c.PersistentPreRun != nil {
c.PersistentPreRun(c, argWoFlags)
}
if c.PreRun != nil {
c.PreRun(c, argWoFlags)
}
@ -464,6 +471,9 @@ func (c *Command) execute(a []string) (err error) {
if c.PostRun != nil {
c.PostRun(c, argWoFlags)
}
if c.PersistentPostRun != nil {
c.PersistentPostRun(c, argWoFlags)
}
return nil
}
@ -546,6 +556,8 @@ func (c *Command) initHelp() {
Long: `Help provides help for any command in the application.
Simply type ` + c.Name() + ` help [path to command] for full details.`,
Run: c.HelpFunc(),
PersistentPreRun: func(cmd *Command, args []string) {},
PersistentPostRun: func(cmd *Command, args []string) {},
}
}
c.AddCommand(c.helpCommand)
@ -585,6 +597,14 @@ func (c *Command) AddCommand(cmds ...*Command) {
c.commandsMaxNameLen = nameLen
}
c.commands = append(c.commands, x)
// Pass on peristent pre/post functions to children
if x.PersistentPreRun == nil {
x.PersistentPreRun = c.PersistentPreRun
}
if x.PersistentPostRun == nil {
x.PersistentPostRun = c.PersistentPostRun
}
}
}