packer-cn/common/boot_command/boot_command.pigeon

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{
package bootcommand
}
Input <- expr:Expr EOF {
return expr, nil
}
Expr <- l:( Wait / CharToggle / Special / Literal)+ {
return l, nil
}
Wait = ExprStart "wait" duration:( Duration / Integer )? ExprEnd {
var d time.Duration
switch t := duration.(type) {
case time.Duration:
d = t
case int64:
d = time.Duration(t) * time.Second
default:
d = time.Second
}
return &waitExpression{d}, nil
}
CharToggle = ExprStart lit:(Literal) t:(On / Off) ExprEnd {
return &literal{lit.(*literal).s, t.(KeyAction)}, nil
}
Special = ExprStart s:(SpecialKey) t:(On / Off)? ExprEnd {
if t == nil {
return &specialExpression{string(s.([]byte)), KeyPress}, nil
}
return &specialExpression{string(s.([]byte)), t.(KeyAction)}, nil
}
Number = '-'? Integer ( '.' Digit+ )? {
return string(c.text), nil
}
Integer = '0' / NonZeroDigit Digit* {
return strconv.ParseInt(string(c.text), 10, 64)
}
Duration = ( Number TimeUnit )+ {
return time.ParseDuration(string(c.text))
}
On = "on"i {
return KeyOn, nil
}
Off = "off"i {
return KeyOff, nil
}
Literal = . {
r, _ := utf8.DecodeRune(c.text)
return &literal{r, KeyPress}, nil
}
ExprEnd = ">"
ExprStart = "<"
SpecialKey = "bs"i / "del"i / "enter"i / "esc"i / "f10"i / "f11"i / "f12"i
/ "f1"i / "f2"i / "f3"i / "f4"i / "f5"i / "f6"i / "f7"i / "f8"i / "f9"i
/ "return"i / "tab"i / "up"i / "down"i / "spacebar"i / "insert"i / "home"i
/ "end"i / "pageUp"i / "pageDown"i / "leftAlt"i / "leftCtrl"i / "leftShift"i
/ "rightAlt"i / "rightCtrl"i / "rightShift"i / "leftSuper"i / "rightSuper"i
/ "left"i / "right"i
NonZeroDigit = [1-9]
Digit = [0-9]
TimeUnit = ("ns" / "us" / "µs" / "ms" / "s" / "m" / "h")
_ "whitespace" <- [ \n\t\r]*
EOF <- !.