91 lines
2.3 KiB
Go
91 lines
2.3 KiB
Go
// Copyright 2009 The "config" Authors
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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 config
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import (
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"bufio"
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"fmt"
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"os"
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"strings"
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)
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// WriteFile saves the configuration representation to a file.
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// The desired file permissions must be passed as in os.Open. The header is a
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// string that is saved as a comment in the first line of the file.
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func (c *Config) WriteFile(fname string, perm os.FileMode, header string) error {
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file, err := os.OpenFile(fname, os.O_WRONLY|os.O_CREATE|os.O_TRUNC, perm)
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if err != nil {
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return err
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}
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buf := bufio.NewWriter(file)
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if err = c.write(buf, header); err != nil {
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return err
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}
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buf.Flush()
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return file.Close()
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}
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func (c *Config) write(buf *bufio.Writer, header string) (err error) {
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if header != "" {
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// Add comment character after of each new line.
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if i := strings.Index(header, "\n"); i != -1 {
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header = strings.Replace(header, "\n", "\n"+c.comment, -1)
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}
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if _, err = buf.WriteString(c.comment + header + "\n"); err != nil {
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return err
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}
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}
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for _, orderedSection := range c.Sections() {
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for section, sectionMap := range c.data {
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if section == orderedSection {
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// Skip default section if empty.
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if section == DEFAULT_SECTION && len(sectionMap) == 0 {
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continue
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}
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if _, err = buf.WriteString("\n[" + section + "]\n"); err != nil {
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return err
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}
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// Follow the input order in options.
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for i := 0; i < c.lastIdOption[section]; i++ {
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for option, tValue := range sectionMap {
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if tValue.position == i {
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if _, err = buf.WriteString(fmt.Sprint(
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option, c.separator, tValue.v, "\n")); err != nil {
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return err
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}
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c.RemoveOption(section, option)
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break
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}
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}
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}
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}
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}
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}
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if _, err = buf.WriteString("\n"); err != nil {
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return err
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}
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return nil
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}
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