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// Copyright 2021 Google LLC
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package mk2rbc
import "fmt"
// Starlark expression types we use
type starlarkType int
const (
// Variable types. Initially we only know the types of the product
// configuration variables that are lists, and the types of some
// hardwired variables. The remaining variables are first entered as
// having an unknown type and treated as strings, but sometimes we
// can infer variable's type from the value assigned to it.
starlarkTypeUnknown starlarkType = iota
starlarkTypeList starlarkType = iota
starlarkTypeString starlarkType = iota
starlarkTypeInt starlarkType = iota
starlarkTypeBool starlarkType = iota
starlarkTypeVoid starlarkType = iota
)
func (t starlarkType) String() string {
switch t {
case starlarkTypeList:
return "list"
case starlarkTypeString:
return "string"
case starlarkTypeInt:
return "int"
case starlarkTypeBool:
return "bool"
case starlarkTypeVoid:
return "void"
case starlarkTypeUnknown:
return "unknown"
default:
panic(fmt.Sprintf("Unknown starlark type %d", t))
}
}
type hiddenArgType int
const (
// Some functions have an implicitly emitted first argument, which may be
// a global ('g') or configuration ('cfg') variable.
hiddenArgNone hiddenArgType = iota
hiddenArgGlobal hiddenArgType = iota
hiddenArgConfig hiddenArgType = iota
)
type varClass int
const (
VarClassConfig varClass = iota
VarClassSoong varClass = iota
VarClassLocal varClass = iota
)
type variableRegistrar interface {
NewVariable(name string, varClass varClass, valueType starlarkType)
}
// ScopeBase is a placeholder implementation of the mkparser.Scope.
// All our scopes are read-only and resolve only simple variables.
type ScopeBase struct{}
func (s ScopeBase) Set(_, _ string) {
panic("implement me")
}
func (s ScopeBase) Call(_ string, _ []string) []string {
panic("implement me")
}
func (s ScopeBase) SetFunc(_ string, _ func([]string) []string) {
panic("implement me")
}
// Used to find all makefiles in the source tree
type MakefileFinder interface {
Find(root string) []string
}
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