Handle config, parse flags

internal/config/file.go

@@ -0,0 +1,54 @@
+// This file is part of the happyDeliver (R) project.
+// Copyright (c) 2025 happyDomain
+// Authors: Pierre-Olivier Mercier, et al.
+//
+// This program is offered under a commercial and under the AGPL license.
+// For commercial licensing, contact us at <contact@happydomain.org>.
+//
+// For AGPL licensing:
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Affero General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU Affero General Public License for more details.
+//
+// You should have received a copy of the GNU Affero General Public License
+// along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+package config
+
+import (
+	"bufio"
+	"fmt"
+	"os"
+	"strings"
+)
+
+// parseFile opens the file at the given filename path, then treat each line
+// not starting with '#' as a configuration statement.
+func parseFile(o *Config, filename string) error {
+	fp, err := os.Open(filename)
+	if err != nil {
+		return err
+	}
+	defer fp.Close()
+
+	scanner := bufio.NewScanner(fp)
+	n := 0
+	for scanner.Scan() {
+		n += 1
+		line := strings.TrimSpace(scanner.Text())
+		if len(line) > 0 && !strings.HasPrefix(line, "#") && strings.Index(line, "=") > 0 {
+			err := parseLine(o, line)
+			if err != nil {
+				return fmt.Errorf("%v:%d: error in configuration: %w", filename, n, err)
+			}
+		}
+	}
+
+	return nil
+}