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Add MaxArgs, NumArgs, clean up returns

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rwxrob 2022-04-14 07:51:13 -04:00
parent 7a319fdcc2
commit 1abb85778c
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GPG Key ID: 2B9111F33082AE77
1 changed files with 18 additions and 5 deletions
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23
z/cmd.go
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@ -55,6 +55,8 @@ type Cmd struct {
// faster than lots of "if" in Call
MinArgs int `json:"-"` // minimum number of args required (including parms)
MaxArgs int `json:"-"` // maximum number of args required (including parms)
NumArgs int `json:"-"` // exact number of args required (including parms)
MinParm int `json:"-"` // minimum number of params required
MaxParm int `json:"-"` // maximum number of params required
ReqConf bool `json:"-"` // requires Z.Conf be assigned
@ -190,8 +192,11 @@ func (x *Cmd) cacheSections() {
// Exiting can be controlled, however, by calling ExitOn or ExitOff
// (primarily for testing). Use Call instead of Run when delegation is
// needed. However, avoid tight-coupling that comes from delegation with
// Call when possible. Use a high-level branch pkg instead (which is
// idiomatic for good Bonzai branch development).
// Call when possible. Also, Call automatically assumes the proper
// number and type of arguments have already been checked (see MinArgs,
// MaxArgs, NumArgs, etc.) which is normally done by Run. Use
// a high-level branch pkg instead (which is idiomatic for good Bonzai
// branch development).
//
// Handling Completion
//
@ -232,6 +237,9 @@ func (x *Cmd) cacheSections() {
func (x *Cmd) Run() {
defer TrapPanic()
// returns throughout are because Exit* can be disabled
// see ExitOff/On
x.cacheSections()
// resolve Z.Aliases (if completion didn't replace them)
@ -245,7 +253,7 @@ func (x *Cmd) Run() {
}
}
// completion mode
// COMPLETION
line := os.Getenv("COMP_LINE")
if line != "" {
@ -267,24 +275,28 @@ func (x *Cmd) Run() {
if v, has := Aliases[list[0]]; has {
fmt.Println(strings.Join(EscAll(v), " "))
Exit()
return
}
}
each.Println(list)
Exit()
return
}
// own completer, delegate
each.Println(cmd.Comp.Complete(cmd, args...))
Exit()
return
}
// delegation mode
// DELEGATION
// seek should never fail to return something, but ...
cmd, args := x.Seek(os.Args[1:])
if cmd == nil {
ExitError(x.UsageError())
ExitError(IncorrectUsage{cmd})
return
}
// default to first Command if no Call defined
@ -322,6 +334,7 @@ func (x *Cmd) Run() {
}
if err := cmd.Call(cmd, args...); err != nil {
ExitError(err)
return
}
Exit()
}