74 lines
1.6 KiB
Go
74 lines
1.6 KiB
Go
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package main
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import (
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"bufio"
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"os"
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)
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func fileExists(path string) (bool, error) {
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_, err := os.Stat(path)
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if err == nil {
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return true, nil
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}
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if os.IsNotExist(err) {
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return false, nil
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}
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return false, err
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}
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func getFileContentLines(path string) ([]string, error) {
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file, err := os.Open(path)
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if err != nil {
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return nil, err
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}
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defer file.Close()
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var lines []string
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scanner := bufio.NewScanner(file)
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for scanner.Scan() {
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lines = append(lines, scanner.Text())
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}
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if err := scanner.Err(); err != nil {
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return nil, err
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}
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return lines, nil
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}
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func writeOverContentInFile(path string, lines []string) error {
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file, err := os.OpenFile(path, os.O_WRONLY|os.O_TRUNC, 0644)
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if err != nil {
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return err
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}
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defer file.Close()
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writer := bufio.NewWriter(file)
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for _, line := range lines {
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_, err := writer.WriteString(line + "\n")
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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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err = writer.Flush()
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if 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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func writeHostsFile(data *workingData) error {
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var newFileContent []string
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newFileContent = append(newFileContent, data.PrefixContent...)
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if len(data.NewContent) > 0 {
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data.NewContent = dedupeSlice(data.NewContent)
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newFileContent = append(newFileContent, "# "+startPattern)
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newFileContent = append(newFileContent, data.NewContent...)
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newFileContent = append(newFileContent, "# "+endPattern)
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}
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newFileContent = append(newFileContent, data.PostfixContent...)
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if slicesEqual(newFileContent, data.DefaultContent) == false {
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err := writeOverContentInFile(data.HostsFileLocation, newFileContent)
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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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