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113 lines
2.5 KiB
113 lines
2.5 KiB
4 months ago
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// Copyright 2021 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 response
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import (
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"io"
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"io/ioutil"
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"strings"
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"unicode"
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)
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const noQuote = '\x00'
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// ReadRspFile reads a file in Ninja's response file format and returns its contents.
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func ReadRspFile(r io.Reader) ([]string, error) {
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var files []string
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var file []byte
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buf, err := ioutil.ReadAll(r)
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if err != nil {
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return nil, err
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}
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isEscaping := false
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quotingStart := byte(noQuote)
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for _, c := range buf {
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switch {
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case isEscaping:
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if quotingStart == '"' {
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if !(c == '"' || c == '\\') {
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// '\"' or '\\' will be escaped under double quoting.
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file = append(file, '\\')
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}
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}
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file = append(file, c)
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isEscaping = false
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case c == '\\' && quotingStart != '\'':
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isEscaping = true
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case quotingStart == noQuote && (c == '\'' || c == '"'):
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quotingStart = c
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case quotingStart != noQuote && c == quotingStart:
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quotingStart = noQuote
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case quotingStart == noQuote && unicode.IsSpace(rune(c)):
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// Current character is a space outside quotes
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if len(file) != 0 {
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files = append(files, string(file))
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}
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file = file[:0]
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default:
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file = append(file, c)
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}
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}
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if len(file) != 0 {
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files = append(files, string(file))
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}
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return files, nil
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}
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func rspUnsafeChar(r rune) bool {
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switch {
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case 'A' <= r && r <= 'Z',
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'a' <= r && r <= 'z',
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'0' <= r && r <= '9',
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r == '_',
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r == '+',
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r == '-',
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r == '.',
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r == '/':
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return false
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default:
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return true
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}
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}
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var rspEscaper = strings.NewReplacer(`'`, `'\''`)
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// WriteRspFile writes a list of files to a file in Ninja's response file format.
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func WriteRspFile(w io.Writer, files []string) error {
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for i, f := range files {
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if i != 0 {
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_, err := io.WriteString(w, " ")
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if err != nil {
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return err
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}
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}
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if strings.IndexFunc(f, rspUnsafeChar) != -1 {
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f = `'` + rspEscaper.Replace(f) + `'`
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}
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_, err := io.WriteString(w, f)
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if err != nil {
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return err
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}
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}
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return nil
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}
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