Function appendConfigInclude

internal/nix/config.go:128–170

(srcPath, includePath string)

}

func appendConfigInclude(srcPath, includePath string) (appended bool, err error) {
	nixConf, err := os.OpenFile(srcPath, os.O_RDWR, 0)
	if err != nil {
		return false, err
	}
	defer nixConf.Close()

	confb, err := io.ReadAll(nixConf)
	if err != nil {
		return false, err
	}
	for _, line := range strings.Split(string(confb), "\n") {
		line = strings.TrimSpace(line)
		if line == "" {
			// <whitespace>
			continue
		}
		if strings.HasPrefix(line, "#") {
			// # comment
			continue
		}

		path := strings.TrimSpace(strings.TrimPrefix(line, "include"))
		if path == includePath {
			// include devbox-nix.conf
			return false, nil
		}
		path = strings.TrimSpace(strings.TrimPrefix(line, "!include"))
		if path == includePath {
			// !include devbox-nix.conf
			return false, nil
		}
	}

	include := "\ninclude " + includePath + "\n"
	if _, err := nixConf.WriteString(include); err != nil {
		return false, redact.Errorf("append %q to %s: %v", redact.Safe(include), srcPath, err)
	}
	if err := nixConf.Close(); err != nil {
		return false, redact.Errorf("append %q to %s: %v", redact.Safe(include), srcPath, err)
	}
	return true, nil
}