45 lines
1.0 KiB
Go
45 lines
1.0 KiB
Go
package install
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import (
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"fmt"
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"os"
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"regexp"
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"github.com/posener/script"
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)
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func lineInFile(path string, line string) bool {
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return script.Cat(path).Grep(regexp.MustCompile("^"+line+"$")).Wc().Lines > 0
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}
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func createFile(path string, content string) error {
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return script.Echo(content).ToFile(path)
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}
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func appendFile(path string, content string) error {
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return script.Echo(content).AppendFile(path)
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}
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func removeFromFile(path string, line string) error {
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backupPath := path + ".bck"
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err := script.Cat(path).ToFile(backupPath)
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if err != nil {
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return fmt.Errorf("creating backup file: %s", err)
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}
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tmp, err := script.Cat(path).Modify(script.Grep{Re: regexp.MustCompile("^" + line + "$"), Inverse: true}).ToTempFile()
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if err != nil {
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return fmt.Errorf("failed remove: %s", err)
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}
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defer os.Remove(tmp)
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err = script.Cat(tmp).ToFile(path)
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if err != nil {
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restoreErr := script.Cat(backupPath).ToFile(path)
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if restoreErr != nil {
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return fmt.Errorf("failed write: %s, and failed restore: %s", err, restoreErr)
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}
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}
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return nil
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}
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