98 lines
2.4 KiB
Go
98 lines
2.4 KiB
Go
// Copyright 2018 Google Inc. All rights reserved.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package makedeps
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import (
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"bytes"
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"fmt"
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"io"
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"strings"
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"android/soong/androidmk/parser"
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)
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type Deps struct {
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Output string
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Inputs []string
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}
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func Parse(filename string, r io.Reader) (*Deps, error) {
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p := parser.NewParser(filename, r)
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nodes, errs := p.Parse()
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if len(errs) == 1 {
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return nil, errs[0]
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} else if len(errs) > 1 {
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return nil, fmt.Errorf("many errors: %v", errs)
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}
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pos := func(node parser.Node) string {
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return p.Unpack(node.Pos()).String() + ": "
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}
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ret := &Deps{}
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for _, node := range nodes {
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switch x := node.(type) {
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case *parser.Comment:
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// Do nothing
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case *parser.Rule:
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if x.Recipe != "" {
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return nil, fmt.Errorf("%sunexpected recipe in rule: %v", pos(node), x)
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}
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if !x.Target.Const() {
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return nil, fmt.Errorf("%sunsupported variable expansion: %v", pos(node), x.Target.Dump())
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}
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outputs := x.Target.Words()
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if len(outputs) > 0 {
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ret.Output = outputs[0].Value(nil)
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} else {
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// TODO(b/141372861): put this back
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//return nil, fmt.Errorf("%smissing output: %v", pos(node), x)
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}
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if !x.Prerequisites.Const() {
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return nil, fmt.Errorf("%sunsupported variable expansion: %v", pos(node), x.Prerequisites.Dump())
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}
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for _, input := range x.Prerequisites.Words() {
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ret.Inputs = append(ret.Inputs, input.Value(nil))
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}
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default:
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return nil, fmt.Errorf("%sunexpected line: %#v", pos(node), node)
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}
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}
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return ret, nil
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}
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func (d *Deps) Print() []byte {
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// We don't really have to escape every \, but it's simpler,
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// and ninja will handle it.
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replacer := strings.NewReplacer(" ", "\\ ",
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":", "\\:",
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"#", "\\#",
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"$", "$$",
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"\\", "\\\\")
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b := &bytes.Buffer{}
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fmt.Fprintf(b, "%s:", replacer.Replace(d.Output))
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for _, input := range d.Inputs {
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fmt.Fprintf(b, " %s", replacer.Replace(input))
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}
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fmt.Fprintln(b)
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return b.Bytes()
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}
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