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