96 lines
2.4 KiB
Go
96 lines
2.4 KiB
Go
// Copyright 2018 Google Inc. All rights reserved.
|
|
//
|
|
// 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 main
|
|
|
|
import (
|
|
"bytes"
|
|
"fmt"
|
|
"io"
|
|
"strings"
|
|
|
|
"android/soong/androidmk/parser"
|
|
)
|
|
|
|
type Deps struct {
|
|
Output string
|
|
Inputs []string
|
|
}
|
|
|
|
func Parse(filename string, r io.Reader) (*Deps, error) {
|
|
p := parser.NewParser(filename, r)
|
|
nodes, errs := p.Parse()
|
|
|
|
if len(errs) == 1 {
|
|
return nil, errs[0]
|
|
} else if len(errs) > 1 {
|
|
return nil, fmt.Errorf("many errors: %v", errs)
|
|
}
|
|
|
|
pos := func(node parser.Node) string {
|
|
return p.Unpack(node.Pos()).String() + ": "
|
|
}
|
|
|
|
ret := &Deps{}
|
|
|
|
for _, node := range nodes {
|
|
switch x := node.(type) {
|
|
case *parser.Comment:
|
|
// Do nothing
|
|
case *parser.Rule:
|
|
if x.Recipe != "" {
|
|
return nil, fmt.Errorf("%sunexpected recipe in rule: %v", pos(node), x)
|
|
}
|
|
|
|
if !x.Target.Const() {
|
|
return nil, fmt.Errorf("%sunsupported variable expansion: %v", pos(node), x.Target.Dump())
|
|
}
|
|
outputs := x.Target.Words()
|
|
if len(outputs) == 0 {
|
|
return nil, fmt.Errorf("%smissing output: %v", pos(node), x)
|
|
}
|
|
ret.Output = outputs[0].Value(nil)
|
|
|
|
if !x.Prerequisites.Const() {
|
|
return nil, fmt.Errorf("%sunsupported variable expansion: %v", pos(node), x.Prerequisites.Dump())
|
|
}
|
|
for _, input := range x.Prerequisites.Words() {
|
|
ret.Inputs = append(ret.Inputs, input.Value(nil))
|
|
}
|
|
default:
|
|
return nil, fmt.Errorf("%sunexpected line: %#v", pos(node), node)
|
|
}
|
|
}
|
|
|
|
return ret, nil
|
|
}
|
|
|
|
func (d *Deps) Print() []byte {
|
|
// We don't really have to escape every \, but it's simpler,
|
|
// and ninja will handle it.
|
|
replacer := strings.NewReplacer(" ", "\\ ",
|
|
":", "\\:",
|
|
"#", "\\#",
|
|
"$", "$$",
|
|
"\\", "\\\\")
|
|
|
|
b := &bytes.Buffer{}
|
|
fmt.Fprintf(b, "%s:", replacer.Replace(d.Output))
|
|
for _, input := range d.Inputs {
|
|
fmt.Fprintf(b, " %s", replacer.Replace(input))
|
|
}
|
|
fmt.Fprintln(b)
|
|
return b.Bytes()
|
|
}
|